Caterpillarengine - marinemarine engine
Caterpillar 3412D
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 3412D marine is a V12, four-stroke diesel built for propulsion and auxiliary/generator-drive duty aboard commercial and pleasure vessels. It uses Caterpillar's 27 L (1,649 cu in) 3400-family block with a 137 mm x 152 mm (5.4 in x 6.0 in) bore and stroke, direct injection, and a mechanical/hydromechanical governor paired with turbocharging and aftercooling (single-turbo DITA, or twin-turbo on the higher-output builds). Factory ratings span roughly 480 bhp on continuous duty up to 850+ bhp on high-output/intermittent ratings, at rated speeds between about 1800 and 2300 rpm depending on the specific rating plate. Dry weight runs roughly 2,300-2,800 kg (5,100-6,100 lb) depending on rating and accessories, before the reduction gear. The 3412D sits inside the 3412 family Caterpillar built from the early 1980s into the mid-2000s: it followed the earlier mechanically-injected 3412 and 3412C, ran alongside the electronically controlled 3412E introduced in 1996, and was phased out of the new-build marine catalog in favor of the ACERT-generation C27. Caterpillar offered it as straight propulsion units with heat-exchanger or keel-cooled packages, and as auxiliary/genset drive engines.
What set the 3412D apart inside its own family was the fuel system, not the block. Where the 3412E moved to electronically controlled HEUI injection for tighter emissions and fuel control, the 3412D kept a mechanical/hydromechanical governor and unit injectors, and Caterpillar sold both side by side through the 1990s because commercial operators running offshore supply vessels, tugs, and fishing boats often wanted a fuel system a shipboard engineer could troubleshoot without a laptop. That preference for mechanical simplicity, plus the high output available on its top ratings, kept the 3412D going into tugs, crew boats, and motoryacht installations well after Caterpillar moved its new marine lineup to ACERT electronics. In the used and parts market today, the 3412D matters because of that installed base: a large population of hours-proven units is still working in older commercial hulls and repowers, wear parts carry over closely with the 3412/3412C family, and mechanical-injection simplicity keeps field rebuilds practical for shops without electronic diagnostic support.
Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.
Caterpillar 3412D specifications
Engine
| Model / series | Caterpillar 3412D, part of the 3412 marine diesel family (3412, 3412C, 3412D, 3412E). V-12, 4-stroke-cycle diesel. The 3412D nameplate covers a single-turbo aftercooled (TA) build and twin-turbo aftercooled builds (DITA/TTA/DITTA). |
| Power rating (gross) | Varies by turbo arrangement and rated speed, roughly 400-630 bkW (540-850 bhp) across the 3412D lineup. A commonly cataloged continuous rating is 460 bkW (617 bhp) at 1800 rpm on the single-turbo aftercooled (TA) build with mechanical governor. Twin-turbo aftercooled (DITA/DITTA) builds reach approximately 560-630 bkW (750-848 bhp). A lower continuous 3412D-TTA rating near 400 bkW (542 bhp) is also cataloged. Confirm exact rating against the engine arrangement number and duty-cycle classification. |
| Displacement | 27 L (1,649 cu in) |
| Cylinders / configuration | 12-cylinder V, 4-stroke-cycle. Bore 137 mm (5.4 in), stroke 152 mm (6.0 in). |
| Compression ratio | 14.1:1 |
| Aspiration | Turbocharged and aftercooled. Single-turbo (TA) on the lower continuous ratings; twin-turbo aftercooled (DITA/TTA/DITTA) on the higher-output ratings. |
| Governor | Mechanical on TA-rated builds; hydromechanical reported on twin-turbo DITTA builds. |
| Emissions | Later production units are marked to an EPA Tier 1 marine rating; earlier builds predate formal marine emissions tiers. Confirm tier by serial number and build date with a dealer. |
Weights
| Engine weight, net dry (TA-rated build) | Approximately 2,300-2,620 kg (5,100-5,780 lb) per factory spec sheet data; exact figure depends on accessories fitted. |
| Packaged weight, twin-turbo builds (incl. shipping skid) | Approximately 2,630-2,950 kg (5,800-6,500 lb) as offered by used-engine sellers, varies with configuration and accessories. |
Dimensions
| Length | Approximately 2.18-2.31 m (86-91 in), varies by turbo/aftercooler configuration and accessory fit |
| Width | Approximately 1.37-1.53 m (54-60 in), varies by configuration |
| Height | Approximately 1.6-1.78 m (63-70 in), varies by configuration |
| Note | Dimensions above are as-shipped figures from used-engine listings, which typically include the wood shipping skid; bare-engine footprint may run slightly smaller. No single factory figure applies across all 3412D turbo configurations. |
Performance
| Rated engine speed | 1800 rpm on continuous-duty, TA-rated propulsion builds. Higher-output twin-turbo builds are cataloged up to roughly 2100-2300 rpm on intermittent/high-output duty ratings. Exact rated speed depends on the duty-cycle classification (continuous, intermittent, or high-output). |
| Direction of rotation | Counterclockwise, viewed from the flywheel end |
| Cooling arrangement | Heat-exchanger or keel-cooled circuit depending on installation. Thermostat full-open around 92 degC (198 degF). |
Service capacities (summary)
| Engine oil (lube system) | 68.1 L (18.0 gal) |
| Cooling system | Not published as a single figure across configurations. Capacity depends on whether the installation is heat-exchanger or keel-cooled and on the vessel piping run. Confirm with the installation drawing or dealer. |
| Fuel tank | Not applicable to the engine itself. Fuel tank is vessel-supplied and sized per installation. |
| Hydraulic system | Not applicable. This is a marine propulsion diesel with no onboard hydraulic system. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
3412D fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (lube oil system, with filter, deep-sump pan) | 68.1 L (18.0 US gal) for the B-rating (626 mhp / 460 bkW) propulsion package; varies with sump depth and rating across the 3412D marine line | Caterpillar Diesel Engine Oil (Cat DEO), SAE 10W-30 or SAE 15W-40, deep-sump oil pan. Use 10W-30 in cooler ambient ranges for easier cold start; 15W-40 suits warmer, sustained-load operation. Change interval 500 hours. |
| Cooling system (jacket water, heat exchanger, expansion tank) | 67.0 L (17.7 US gal) on the B-rating heat-exchanger-cooled package; higher-output TTA/DITA marine ratings in the 3412D line report roughly 100+ L - capacity varies by power rating/configuration | Caterpillar coolant, mixed with water per climate. Cat ELC (Extended Life Coolant) is the preferred long-life fill; Cat DEAC (conventional Diesel Engine Antifreeze/Coolant) is the lower-upfront-cost alternative requiring supplemental additive top-off on schedule. |
| Fuel system | Not a fixed engine refill spec - the engine carries only a fuel filter, transfer pump, and priming pump; usable fuel volume is set by the vessel's own tank installation, not the engine OMM | Clean diesel fuel per Caterpillar fuel specification; no engine-side reservoir capacity to report. |
| Marine gear / reduction gear (transmission) | Not covered by the 3412D engine documentation - the reduction/marine gear is a separate bolt-on unit | Follow the specific marine gear manufacturer's own fluid chart; the engine's cooling system does supply a transmission oil cooler, but gear oil type and fill volume are set by the gear maker, not the 3412D engine OMM. |
| Final drives | Not applicable | Not applicable - marine propulsion engine, no final drive assemblies. |
| Hydraulic system and tank | Not applicable | Not applicable - mechanically governed diesel propulsion engine; no onboard hydraulic circuit. |
| Axles / differentials | Not applicable | Not applicable - engine only, no axle assemblies. |
| Grease points | Spec only - no engine-side reservoir volume listed | Cat Multipurpose Marine Grease (or equivalent Cat marine-rated multipurpose grease) for any accessible grease fittings; formulated for wide ambient range and resists fresh/salt-water washout. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 3412D maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 6,000 h |
|
Servicing the 3412D beyond the schedule
Predictive Maintenance & Fluid Analysis
Pull an oil sample at every 250-hour service and trend wear metals and soot loading across the V12's mechanical injection train, not just at the drain interval. Test coolant SCA/additive concentration alongside every sample to catch liner-pitting risk before it shows up as coolant loss. On raw-water-cooled installs, log heat exchanger outlet temperature and jacket-water pressure against baseline so scaling or pump wear shows up as a trend, not a high-temperature alarm underway.
Corrective & Common Repairs
Most 3412D corrective work traces to fuel and cooling, not the block. Contaminated or water-cut marine fuel fouls injectors and drives the black-smoke, power-loss complaints owners report; check the primary separator before chasing the injection pump. Heat exchanger tube fouling and a worn raw-water pump impeller are the top cause of high-temperature shutdowns. On repowers, check engine-to-reduction-gear alignment after any mount or coupling work, since misalignment on this heavy V12 accelerates main and thrust bearing wear.
Overhaul & Rebuild Points
Plan a top-end overhaul around cylinder liner, piston, and ring wear limits once compression and blow-by trend outside factory spec, typically well past the 6,000-hour mark on continuous-duty ratings. Bench-test and rebuild fuel injection nozzles as a set rather than one at a time so cylinder-to-cylinder output stays balanced. A turbocharger cartridge rebuild, jacket-water pump overhaul, and full engine-to-gear alignment check belong on the same overhaul, since disturbing the mounts resets the alignment baseline.
Seasonal & Environment Servicing
Lay-up season is a raw-water job on the 3412D: flush and drain the raw-water side, pull and inspect every zinc/pencil anode, and fog or protect cylinders per the OMM before extended idle. Salt air corrodes exposed wiring, sensor connectors, and alternator terminals faster than the engine itself wears, so clean and dielectric-grease connections at haul-out. Keep the fuel/water separator on a short inspection cycle in humid bilges, and check keel-cooler or heat exchanger zincs more often in warm, high-salinity water.
3412D common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 1D-4540 | Bolt,Machine Fuel Filter Mounting | Fuel system service | Check fitment → |
| 1R-0749 | Filter-Fuel | Fuel system service | Check fitment → |
| 1R-1808 | Filter As-Engine Oil | Lubrication service | Check fitment → |
| 4N-7082 | Shield-Oil Filter | Lubrication service | Check fitment → |
| 1R-0716 | Filter As-Engine Oil | Lubrication service | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
3412D fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| CID 0100 FMI 03 | Engine oil pressure sensor circuit: voltage above normal, open circuit or short to +battery | Damaged sensor wiring, corroded connector pins, or a failed oil pressure sensor | Inspect the sensor connector and harness for damage or corrosion, check sensor supply voltage, replace the sensor if wiring checks out good |
| CID 0100 FMI 01 | Engine oil pressure data valid but below the normal operating range | Low oil level, worn oil pump, plugged filter or suction screen, or worn main/rod bearings | Shut engine down if an alarm or shutdown is active, verify oil level and filter condition, cross-check the reading against a mechanical gauge before further teardown |
| CID 0110 FMI 00 | Engine coolant temperature data valid but above the normal operating range | Low coolant level, fouled heat exchanger or raw-water side, worn raw-water pump impeller, or restricted raw-water flow | Reduce load and let the engine cool, check raw-water flow and impeller condition, inspect heat exchanger and expansion tank coolant level |
| CID 0110 FMI 04 | Coolant temperature sensor circuit voltage below normal, shorted low | Damaged sensor, corroded connector pins, or chafed harness grounding the signal wire | Inspect connector and wiring for chafe or corrosion, test sensor resistance against spec, replace sensor if the circuit test fails |
| CID 0168 FMI 02 | System or battery voltage data erratic, intermittent, or incorrect | Loose or corroded battery terminals, a failing charging system, or a poor ECM ground | Check battery connections and charging voltage, clean and tighten ECM ground points, load-test the alternator/charging circuit |
| CID 0190 FMI 08 | Engine speed/timing sensor signal has an abnormal frequency, pulse width, or period | Damaged speed/timing sensor, incorrect sensor air gap, debris on the sensor tip, or a damaged timing wheel | Inspect sensor mounting and air gap, clean the sensor tip, check wiring continuity, replace the sensor if the signal stays abnormal |
| CID 0021 FMI 00 | Boost (turbocharger inlet manifold) pressure data valid but above the normal range | Turbocharger wastegate malfunction, restricted air intake, or a drifted boost sensor | Inspect air intake and turbocharger for restriction or damage, verify the sensor reading against a manual gauge before replacing parts |
| CID 0253 FMI 02 | Personality module (ECM calibration/software) data erratic or mismatched to the engine | Incorrect or corrupted engine calibration file, or an ECM fault | Connect the Caterpillar electronic service tool, verify the flash file matches the engine rating and serial number, reflash or replace the ECM as needed |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
3412D attachments & work tools
Reduction/reverse marine gear
The 3412D bolts to a separate marine reduction/reverse gearbox rather than a direct-drive coupling; gearboxes in this engine class are offered in multiple reduction ratios to match propeller and vessel service (commonly in the roughly 2:1 to 4.5:1 range across the platform). Exact ratio and gear model are matched per installation and duty cycle, so confirm the specific gearbox pairing with the gear manufacturer or dealer for a given rated output.
Power/duty-rating configurations
The 3412D marine propulsion engine is factory-offered at several duty ratings on the same 27L V12 twin-turbo-aftercooled block: lower continuous-duty ratings around 540-620 bhp (roughly 400-460 bkW) up through higher intermittent ratings near 750-850 bhp, selected per vessel service and duty cycle. A TTA (twin-turbocharged, aftercooled) continuous-rated variant is also cataloged alongside the standard intermittent ratings.
Cooling system: heat exchanger vs keel cooling
Two cooling arrangements are offered for the 3412D marine engine: a heat-exchanger circuit (gear-driven sea water and jacket water pumps, expansion tank with heat exchanger and deaerator, plus oil cooler) or full keel cooling, which cools the fresh-water jacket circuit through hull-mounted keel coolers and removes the raw-water side of the loop. Selection depends on vessel type and operating water (open sea vs silty/debris-laden water favors keel cooling).
Exhaust system
Standard configuration is a water-cooled exhaust manifold and turbocharger with a round flanged outlet of about 130 mm (5.1 in). This flange is the engine's factory exhaust connection point; whether the installation runs wet or dry beyond that point is determined by the boat builder's exhaust design, not a factory engine option itself.
Propulsion vs auxiliary/genset application
The 3412D marine platform is built for both main propulsion (frequently installed as twin engines in tugs, crew boats, and offshore supply vessels) and as a marine auxiliary or generator-set prime mover. Genset output for this engine platform is a separate, lower continuous rating than the propulsion ratings; exact genset kW varies by the specific rating and generator end selected, so verify against the applicable spec sheet rather than assuming a propulsion-rating figure applies.
All 3412D assemblies by section
Every catalogued assembly group for the Caterpillar 3412D. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
242-6168 Aftercooler Gp
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 1 |
| 0T***73 | Bolt (3/8) (63.5mm Long) (On Cab Of Cover Assem.) | 14 |
| 10***32 | Bracket As | 1 |
130-8220 Air Cleaner Gp
| 13***20 | Air Cleaner Group | 1 |
| 6I***37 | Screen As | 2 |
| 8T***88 | Clamp-Hose | 2 |
7s-4411 Cap As-Rain -Exhaust Pipe
| 7S***11 | Cap As-Rain; -Exhaust Pipe | 1 |
6n-6093 Elbow Gp-Exhaust
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 25***63 | Gasket | 1 |
| 3J***89 | Plug Fuel Pump Bracket Turbocharger Oil Hole | 2 |
5n-9223 Elbow Gp-Exhaust
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 25***63 | Gasket | 1 |
| 4J***82 | Plug-Pipe; (1/2-14 Nptf) | 1 |
128-4113 Elbow Gp-Exhaust
| 11***14 | Washer; (10.3x18.3x2.66-mm Thk) | 4 |
| 12***13 | Elbow Group-Exhaust | 1 |
| 12***14 | Elbow As-Exhaust | 1 |
8l-9859 Elbow-Exhaust
| 8L***59 | Elbow-Exhaust | 1 |
2w-7847 Fitting Gp-Exhaust -Flexible
| 1B***58 | Nut-Full; (5/8-11-Thd) | 4 |
| 2W***47 | Fitting Group-Exhaust; -Flexible | 1 |
| 3N***17 | Adapter As; (Flexible) | 1 |
2w-7851 Flange Gp-Exhaust
| 1A***35 | Bolt 2.00 In. (5.08 cm) Long | 4 |
| 1B***58 | Nut-Full; (5/8-11-Thd) | 4 |
| 2W***51 | Flange Group-Exhaust | 1 |
2w-7863 Flange Gp-Exhaust
| 1B***57 | Nut-Full; 19.05mm(.75in)O.D. | 8 |
| 2W***63 | Flange Group-Exhaust | 1 |
| 2W***64 | Flange-Exhaust | 1 |
2w-7860 Flange Gp-Exhaust
| 1B***57 | Nut-Full; 19.05mm(.75in)O.D. | 6 |
| 2W***60 | Flange Group-Exhaust | 1 |
| 2W***61 | Flange-Exhaust | 1 |
4p-7477 Lines Gp-Air
| 10***15 | Adapter | 2 |
| 11***14 | Washer; (10.3x18.3x2.66-mm Thk) | 8 |
| 3E***73 | Seal-O-Ring | 2 |
4p-7478 Manifold Gp-Exhaust
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 4 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 6 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 4 |
2w-4073 Muffler
| 2W***73 | Muffler | 1 |
2w-4072 Muffler
| 2W***72 | Muffler | 1 |
4l-5801 Pipe Gp-Exhaust
| 0S***66 | Bolt-Pulley To Crankshaft Adapter | 4 |
| 1B***58 | Nut-Full; (5/8-11-Thd) | 4 |
| 4L***01 | Pipe Group-Exhaust | 1 |
245-9734 Turbocharger Gp
| 0L***24 | Plug (2.25" Diameter) | 6 |
| 14***99 | Cartridge Group-Turbocharger | 1 |
| 24***34 | Turbocharger Group | 1 |
240-4567 Turbocharger Gp
| 0L***24 | Plug (2.25" Diameter) | 6 |
| 14***99 | Cartridge Group-Turbocharger | 1 |
| 24***67 | Turbocharger Group | 1 |
241-1832 Turbocharger Gp
| 24***67 | Turbocharger Group | 2 |
| 24***32 | Turbocharger Group | 1 |
| 7M***73 | Gasket; (Turbocharger) | 2 |
Basic Engine
295-1571 Bracket Gp-Mounting
| 0T***65 | Bolt--3/8" X 3 1/2"--Use As Required; Bolt 5t***56 Plate To Cover Gp 4n***72 | 1 |
| 29***71 | Bracket Group-Mounting | 1 |
| 2F***67 | Spacer; (10.5x19x5.512-mm Thk) | 2 |
4n-0965 Camshaft Gp
| 0S***09 | Bolt (3/4") Filler Tube Assembly To Transfer Drive Case | 2 |
| 10***74 | Gear-Camshaft Drive; (86-Teeth) | 1 |
| 1B***05 | Key; (Woodruff) | 1 |
5n-3790 Clutch As
| 0L***39 | Bolt (3/8-24x2.25in); (3/8-24x2.25-In) | 2 |
| 1K***11 | Collar Assem. | 1 |
| 1K***21 | Shim | 2 |
5n-3789 Clutch As
| 0L***39 | Bolt (3/8-24x2.25in); (3/8-24x2.25-In) | 2 |
| 2L***67 | Locknut; (3/8-24-Thd) | 2 |
| 2L***56 | Plate-Hub & Back | 1 |
5n-7329 Clutch Gp
| 01***50 | Plug To Aftercooler Inlet Elbow | 2 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 1 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 2 |
5n-7330 Clutch Gp
| 01***50 | Plug To Aftercooler Inlet Elbow | 2 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 1 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 2 |
125-4360 Cover Gp-Cylinder Block
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 66 |
| 12***60 | Cover Group-Cylinder Block | 1 |
| 12***15 | Cover | 2 |
121-2014 Cover Gp-Flywheel Housing
| 0S***89 | Bolt, Hex. Hd., 5/8"-11 N.C. X 1 3/4" | 3 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 2 |
| 0S***19 | Bolt,Machine Gear Retaining Part Of Kit P/N 1w***46 | 2 |
4n-7798 Cover Gp-Flywheel Housing
| 0S***66 | Bolt-Pulley To Crankshaft Adapter | 3 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 3 |
| 0S***19 | Bolt,Machine Gear Retaining Part Of Kit P/N 1w***46 | 1 |
4n-6798 Cover Gp-Front Housing
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 6 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 3 |
| 1A***29 | Bolt (1-1/8") Tube Assembly To Transfer Drive Case | 2 |
4p-9248 Cover Gp-Valve Mechanism
| 27***83 | Seal-O-Ring | 2 |
| 4P***48 | Cover Group-Valve Mechanism | 1 |
| 4W***80 | Base-Valve Mechanism Cover | 4 |
213-3219 Crankshaft Gp
| 15***40 | Gear-Crankshaft; (99-Teeth) | 1 |
| 21***03 | Crankshaft As | 1 |
| 21***19 | Crankshaft Group | 1 |
261-4946 Cylinder Block As
| 15***09 | Seal-Liner | 12 |
| 15***10 | Seal-Liner | 12 |
| 15***93 | Seal-Liner | 12 |
238-8196 Cylinder Block As
| 15***09 | Seal-Liner | 12 |
| 15***10 | Seal-Liner | 12 |
| 15***93 | Seal-Liner | 12 |
324-6128 Cylinder Block As
| 15***09 | Seal-Liner | 12 |
| 15***10 | Seal-Liner | 12 |
| 15***93 | Seal-Liner | 12 |
238-8195 Cylinder Block Gp
| 11***27 | Seal-O-Ring; (19.18mm Id) | 5 |
| 22***00 | Plate-Spacer | 2 |
| 23***95 | Cylinder Block Group | 1 |
143-0047 Cylinder Head As
| 14***46 | Cylinder Head As | 1 |
| 14***47 | Cylinder Head As | 1 |
| 17***88 | Guide-Valve; (Standard) | 24 |
143-0046 Cylinder Head As
| 14***46 | Cylinder Head As | 1 |
| 1W***83 | Insert-Valve Seat; (Exhaust)(Standard) | 12 |
| 3B***23 | Core Plug--Flywheel Housing Pinion Shaft Hole | 12 |
269-3676 Cylinder Head Gp
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 19 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 0S***08 | Bolt-Support To Starting Engine Timing Gear Housing | 1 |
141-3228 Cylinder Head Gp
| 12***21 | Valve-Exhaust | 12 |
| 12***22 | Valve-Inlet | 12 |
| 14***28 | Cylinder Head Group | 1 |
4w-7007 Cylinder Head Gp
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 19 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 0S***08 | Bolt-Support To Starting Engine Timing Gear Housing | 1 |
5n-5322 Damper & Pulley Gp
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 12 |
| 16***30 | Damper As | 1 |
| 1B***38 | Bolt; (5/8-18x5.75-In) | 9 |
1n-3270 Drive Gp-Auxiliary
| 1B***17 | Ball Bearing | 1 |
| 1K***85 | Ring Part Of Kit P/N 1w***46 | 1 |
| 1N***31 | Pulley-Auxiliary Drive; (3-Groove) | 1 |
7n-8750 Drive Gp-Auxiliary
| 0T***73 | Bolt (3/8) (63.5mm Long) (On Cab Of Cover Assem.) | 1 |
| 1B***17 | Ball Bearing | 1 |
| 1K***85 | Ring Part Of Kit P/N 1w***46 | 1 |
7n-8881 Drive Gp-Auxiliary
| 0T***73 | Bolt (3/8) (63.5mm Long) (On Cab Of Cover Assem.) | 1 |
| 1B***17 | Ball Bearing | 1 |
| 1K***85 | Ring Part Of Kit P/N 1w***46 | 1 |
7n-2645 Drive Gp-Pump
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 2 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 4 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 6 |
7n-2642 Drive Gp-Pump
| 0S***85 | Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine | 2 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 6 |
| 1Y***74 | Capscrew; (Socket Hd 3/8-16x2-1/2 Gd8) | 4 |
4n-0805 Flywheel Gp
| 4D***04 | Washer,Flat Cover Mtg,Accessory Drive | 12 |
| 4N***05 | Flywheel Group | 1 |
| 4N***85 | Flywheel As | 1 |
7n-3079 Flywheel Gp
| 0S***02 | Bolt; (5/8-18x3.5-In) | 12 |
| 4D***04 | Washer,Flat Cover Mtg,Accessory Drive | 12 |
| 7N***79 | Flywheel Group; Flywheel Group | 1 |
4n-6341 Gear Gp-Front -Timing
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 1 |
| 0T***73 | Bolt (3/8) (63.5mm Long) (On Cab Of Cover Assem.) | 1 |
| 11***17 | Plate-Thrust | 1 |
4n-3825 Gear Gp-Rear
| 1B***75 | Bolt (" " " ); Bolt ( " " " ) | 4 |
| 4N***25 | Gear Group-Rear; Rear Timing Gear Group | 1 |
| 4W***85 | Gear-Camshaft; (86-Teeth) | 1 |
1w-1630 Guard Gp-Belt
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 6 |
| 0T***73 | Bolt (3/8) (63.5mm Long) (On Cab Of Cover Assem.) | 1 |
| 1D***17 | Nut-Plate And Angle Assembly To Hydraulic And Fuel Tanks; Nut Plate And Angle Assembly To Hydraulic And Fuel Tanks | 2 |
6n-2890 Guard Gp-Damper
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 4 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
| 1D***17 | Nut-Plate And Angle Assembly To Hydraulic And Fuel Tanks; Nut Plate And Angle Assembly To Hydraulic And Fuel Tanks | 2 |
120-8668 Housing Gp-Flywheel
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 4 |
| 0T***73 | Bolt (3/8) (63.5mm Long) (On Cab Of Cover Assem.) | 4 |
| 12***68 | Housing Group-Flywheel | 1 |
4n-5226 Housing Gp-Front
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 3 |
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 2 |
| 16***45 | Gasket-Cylinder Block | 1 |
241-9370 Lifting Gp-Engine
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 1 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 2 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 2 |
7w-4071 Mounting Gp-Alternator
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 4 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 1 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
7w-4072 Mounting Gp-Alternator
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 4 |
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 1 |
| 1F***58 | Nut-Full; (1/2-13-Thd)(Air Lines) | 1 |
4n-7182 Pan Gp-Oil -Engine
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 40 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 10***64 | Pan As-Oil; (Engine) | 1 |
235-1844 Piston & Rod Gp
| 15***56 | Bolt-Special; (Oil Jet) | 1 |
| 18***50 | Pin-Piston | 1 |
| 18***03 | Ring-Piston; (Intermediate) | 1 |
127-3512 Plug Gp-Cylinder Block
| 12***12 | Plug Group-Cylinder Block | 1 |
| 6V***89 | Seal-O-Ring (Id=19.18mm) | 6 |
| 7W***34 | Plug-Pipe (3/8-18 Nptf Thd) | 4 |
273-8668 Plug Gp-Cylinder Head
| 27***68 | Plug Group-Cylinder Head | 1 |
| 4N***32 | Plug-Cup | 2 |
| 5P***63 | Plug-Cup | 2 |
4w-9829 Power Take-Off Gp
| 0S***66 | Bolt-Pulley To Crankshaft Adapter | 2 |
| 0S***73 | Bolt (102mm Long); (1/2-13x4-In) | 8 |
| 0S***85 | Bolt; 12.7 mm (1/2") Diameter X 38.1 mm (1 1/2") Length Generator To Engine | 1 |
4w-9830 Power Take-Off Gp
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 8 |
| 0S***66 | Bolt-Pulley To Crankshaft Adapter | 2 |
| 0S***73 | Bolt (102mm Long); (1/2-13x4-In) | 8 |
6n-4581 Pulley Gp-Crankshaft
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 8 |
| 6N***80 | Pulley; (2-Groove) | 1 |
| 6N***81 | Pulley Group-Crankshaft | 1 |
7w-5927 Rocker Arm Gp -Rear, Rh; Front, Lh
| 00***03 | Ring-Retaining | 2 |
| 0L***22 | Plug (.656" Dia.) | 2 |
| 10***03 | Screw; (3/8-24x1.67-In)(Intake) | 6 |
7w-5926 Rocker Arm Gp -Front, Rh; Rear, Lh
| 00***03 | Ring-Retaining | 2 |
| 0L***22 | Plug (.656" Dia.) | 2 |
| 10***03 | Screw; (3/8-24x1.67-In)(Intake) | 6 |
319-0785 Seal Gp-Crankshaft -Rear
| 14***68 | Seal-Crankshaft; (Rear)(Flywheel Housing) | 1 |
| 31***85 | Seal Group-Crankshaft; -Rear | 1 |
319-7401 Seal Gp-Crankshaft -Front
| 14***67 | Seal Group-Crankshaft; (Front) | 1 |
| 31***01 | Seal Group-Crankshaft; -Front | 1 |
8n-9338 Support Gp-Engine -Front
| 0S***73 | Bolt (102mm Long); (1/2-13x4-In) | 8 |
| 1D***16 | Bolt 15.24 cm(6 In.) Long | 2 |
| 2B***15 | Bolt 165 mm(6.5 In.)Long; 165.1mm(6.5 In.)Long | 2 |
5f-3581 V-Belt Gp -Fan Drive-Bilge Pump
| 5F***81 | V-Belt Group; -Fan Drive-Bilge Pump | 1 |
4n-7352 Valve Mechanism Gp
| 10***89 | Bridge-Valve | 24 |
| 10***88 | Valve Lifter Assem | 24 |
| 23***85 | Bolt-12 Point Head; (3/4-16x11.5-In) | 1 |
Cooling System
4n-7050 Connection Gp-Expansion Tank
| 1H***37 | Bolt-Mount 9w***75 Fuel Level Sensor | 6 |
| 2N***45 | Flange | 1 |
| 4L***36 | Gasket | 1 |
5n-8623 Connection Gp-Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 4 |
| 1A***29 | Bolt (1-1/8") Tube Assembly To Transfer Drive Case | 7 |
| 2M***95 | Gasket-Tube As To Regulator Housing | 4 |
2w-0247 Coolant Conditioner Gp -Lh
| 00***43 | Elbow 5wd342 - Up Including 5wd329 - 335, 5wd337 - 340 | 1 |
| 2N***37 | Elbow-Flared | 1 |
| 2W***46 | Plate | 1 |
7n-9844 Coolant Conditioner Gp
| 11***71 | Filter-Coolant Conditioner; (Maintenance) | 2 |
| 7N***44 | Coolant Conditioner Group | 1 |
| 9N***67 | Coolant Conditioner Element As (Pre - Charge); (Use When System Drained And Refilled) | 2 |
9n-3382 Filter Gp-Coolant
| 9N***67 | Coolant Conditioner Element As (Pre - Charge); (Use When System Drained And Refilled) | 1 |
| 9N***68 | Coolant Conditioner Element As (Maintenance); (For Routine Replacement - System Not Drained) | 1 |
| 9N***82 | Coolant Conditioner Group | 1 |
4n-2388 Cooler Gp-Engine Oil
| 10***77 | Seal-O-Ring; (100.97mm Id) | 2 |
| 4N***88 | Cooler Group-Engine Oil; Engine Oil Cooler Group | 1 |
| 7C***45 | Core As-Oil Cooler; (Water Lines) | 1 |
6n-2887 Cooler Gp-Marine Tmsn Oil
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 6 |
| 3J***89 | Plug Fuel Pump Bracket Turbocharger Oil Hole | 2 |
7c-8419 Cover Gp-Cooling System
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 5 |
| 3J***89 | Plug Fuel Pump Bracket Turbocharger Oil Hole | 1 |
| 4N***99 | Gasket (Flange To Bonnet) | 1 |
6n-0671 Filler & Cap Gp -Radiator
| 0S***15 | Bolt 19 mm (.75 In.) Long Return Air Console To Enclosed Rops | 6 |
| 3L***93 | Tube-Overflow | 1 |
| 4L***36 | Gasket | 1 |
3n-8889 Heat Exchanger Gp-Sea Water
| 2N***63 | Flange | 2 |
| 3N***88 | Heat Exchanger Group; Heat Exchanger Group-High Capacity | 1 |
| 3N***89 | Heat Exchanger Group; Heat Exchanger Group-High Capacity | 1 |
3n-8891 Heat Exchanger Gp-Sea Water
| 2N***63 | Flange | 2 |
| 3N***90 | Heat Exchanger Group | 1 |
| 3N***91 | Heat Exchanger Group | 1 |
3n-9094 Heat Exchanger Gp-Sea Water
| 3N***55 | Flange | 2 |
| 3N***92 | Heat Exchanger Group; Heat Exchanger Group High Capacity | 1 |
| 3N***94 | Heat Exchanger Group; Heat Exchanger Group High Capacity | 1 |
3n-8888 Heat Exchanger Gp-Sea Water
| 0T***20 | Bolt (1.25 In. Long X .438 In. Dia.) | 12 |
| 0T***68 | Bolt,Machine; Tube Mounting And Tube To Junction Block Uoc:Bsv,Bsx | 12 |
| 1H***00 | Pin--To Compression Release Shaft | 1 |
3n-7992 Heat Exchanger Gp-Sea Water
| 1H***00 | Pin--To Compression Release Shaft | 1 |
| 29***06 | Core As; (Heat Exchanger) | 1 |
| 3B***06 | Washer,Lock; Flange,Elbow,Clamp Assembly,Tube To Pump,Tube Assembly To Screen,Clip Mounting,And Tube Assembly To Transmission | 20 |
3n-8890 Heat Exchanger Gp-Sea Water
| 0T***20 | Bolt (1.25 In. Long X .438 In. Dia.) | 12 |
| 0T***68 | Bolt,Machine; Tube Mounting And Tube To Junction Block Uoc:Bsv,Bsx | 12 |
| 1H***00 | Pin--To Compression Release Shaft | 1 |
3n-8991 Heat Exchanger Gp-Sea Water
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 8 |
| 1A***29 | Bolt (1-1/8") Tube Assembly To Transfer Drive Case | 8 |
| 1D***17 | Nut-Plate And Angle Assembly To Hydraulic And Fuel Tanks; Nut Plate And Angle Assembly To Hydraulic And Fuel Tanks | 8 |
3n-8990 Heat Exchanger Gp-Sea Water
| 0T***20 | Bolt (1.25 In. Long X .438 In. Dia.) | 12 |
| 0T***68 | Bolt,Machine; Tube Mounting And Tube To Junction Block Uoc:Bsv,Bsx | 12 |
| 1H***00 | Pin--To Compression Release Shaft | 1 |
6n-2550 Lines Gp-Water
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 2 |
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 1 |
6n-1898 Lines Gp-Water
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 5 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 3 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
242-3853 Lines Gp-Water
| 00***01 | Elbow (To Serial No 1md225) | 2 |
| 00***40 | Connector; (37 Degree) | 1 |
| 03***07 | Connector; (Flared) | 1 |
5n-7491 Pump Gp-Auxiliary Sea Water
| 2H***34 | Seal Transfer Pump To Plate | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 3N***01 | Adapter-Pump Mounting | 1 |
7c-3614 Pump Gp-Auxiliary Sea Water
| 10***18 | Plug | 1 |
| 10***10 | Bolt-High Temperature; (7/16-14x1.00 In) | 4 |
| 10***65 | Circlip | 1 |
7c-3613 Pump Gp-Auxiliary Sea Water
| 10***18 | Plug | 1 |
| 10***10 | Bolt-High Temperature; (7/16-14x1.00 In) | 4 |
| 10***65 | Circlip | 1 |
3n-8561 Pump Gp-Auxiliary Sea Water
| 2H***34 | Seal Transfer Pump To Plate | 1 |
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 3N***01 | Adapter-Pump Mounting | 1 |
4w-0050 Pump Gp-Auxiliary Sea Water
| 1L***90 | Ring-Retaining | 1 |
| 2N***48 | Spacer; (17.3x22.2x6.5-mm Thk) | 1 |
| 2N***50 | Ball Bearing | 1 |
4w-0049 Pump Gp-Auxiliary Sea Water
| 2M***80 | Seal--To Connector Pump Outlet | 1 |
| 3V***53 | Hose Assem. 43 cm(16.93 In.) | 1 |
| 4W***49 | Pump Group-Auxiliary Sea Water | 1 |
107-4606 Pump Gp-Auxiliary Sea Water
| 10***06 | Pump Group-Auxiliary Sea Water | 1 |
| 23***25 | Plug-Pipe | 1 |
| 3N***01 | Adapter-Pump Mounting | 1 |
6i-1898 Pump Gp-Auxiliary Sea Water
| 10***61 | . Idler; 20***45 (This Part Is Interchangeable With The Following Part.), Shim; (0.127-mm Thk) | 1 |
| 10***62 | Shim; (0.254-mm Thk) | 1 |
| 10***63 | Shim; (0.305-mm Thk) | 1 |
102-0459 Pump Gp-Water
| 10***49 | Adapter-Inlet | 1 |
| 10***59 | Pump Group-Water | 1 |
| 11***79 | Seal-O-Ring | 1 |
6l-5856 Pump Gp-Water
| 20***67 | Pump As-Bilge | 1 |
| 3B***04 | Lockwasher--Sheet Assembly To Angle Assembly | 4 |
| 4B***55 | Screw-Machine (1/4-20x.750 In) | 3 |
137-1339 Pump Gp-Water
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
| 10***30 | Bearing As-Roller | 1 |
| 11***21 | Plug-Felt; (Water Pump Housing) | 1 |
105-8042 Switch Gp-Coolant Level
| 00***40 | Connector; (Flared) | 1 |
| 10***64 | Mount-Sandwich | 2 |
| 10***42 | Switch Group-Coolant Level | 1 |
241-9368 Tank Gp-Expansion
| 09***19 | Plug-Pipe | 1 |
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 4 |
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 4 |
Electrical And Starting System
4n-3987 Alternator Gp-Charging
| 13***78 | Regulator Group-Voltage; (24 Volt)(Alternator) | 1 |
| 14***04 | Kit-Hardware; (Alternator) | 1 |
| 14***05 | Kit-Terminal; (Alternator) | 1 |
6t-1395 Alternator Gp-Charging
| 10***31 | Fan-Alternator; (11-Blade) | 1 |
| 18***34 | Nut-Flange; (5/8-18-Thd) | 1 |
| 1H***44 | Lockwasher (Bracket To Cab) | 1 |
4n-3986 Alternator Gp-Charging
| 10***31 | Fan-Alternator; (11-Blade) | 1 |
| 10***32 | Collar; (Alternator) | 1 |
| 10***62 | Kit-Alternator Terminal | 1 |
266-7227 Alternator Gp-Charging
| 10***31 | Fan-Alternator; (11-Blade) | 1 |
| 18***34 | Nut-Flange; (5/8-18-Thd) | 1 |
| 1H***44 | Lockwasher (Bracket To Cab) | 1 |
333-1184 Alternator Gp-Charging
| 33***84 | Alternator Group-Charging | 1 |
331-5717 Alternator Gp-Charging
| 10***31 | Fan-Alternator; (11-Blade) | 1 |
| 18***34 | Nut-Flange; (5/8-18-Thd) | 1 |
| 1H***44 | Lockwasher (Bracket To Cab) | 1 |
266-7228 Alternator Gp-Charging
| 10***31 | Fan-Alternator; (11-Blade) | 1 |
| 18***34 | Nut-Flange; (5/8-18-Thd) | 1 |
| 1H***44 | Lockwasher (Bracket To Cab) | 1 |
7w-0408 Battery Charger
| 1M***19 | Bolt; (5/16-18x1.375-In)(5/16-18x1.375 In) | 2 |
| 1M***20 | Nut-Battery Terminal (5/16-18 Thd); (5/16-18-Thd)(5/16-18x1.375 In) | 2 |
| 2V***97 | Cable Assem. | 1 |
160-5447 Battery Gp
| 10***07 | Switch-Operator; (Secondary Stop Push Button) | 1 |
| 11***23 | Block-Contact; (1-Pole)(Normally Open) | 1 |
| 11***25 | Block-Contact; (2-Pole) | 1 |
7l-7872 Battery Gp
| 11***21 | Battery Group | 2 |
| 12***73 | Cap As-Filler; (Battery) | 6 |
| 1M***19 | Bolt; (5/16-18x1.375-In)(5/16-18x1.375 In) | 2 |
9x-9730 Battery Gp -Dry
| 7W***01 | Junction Box Group | 1 |
| 7W***51 | Switch Group; -Shutoff | 1 |
| 9X***30 | Battery Group; (12 Volt)(Dry)(Each Includes) | 1 |
319-6831 Cable-Communication
| 25***62 | Kit-Bracket; (Camera) | 1 |
| 31***31 | Cable-Communication | 1 |
296-0603 Camera Gp
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 16***82 | Switch As-Pressure; (Engine Oil) | 1 |
| 29***03 | Camera Group | 1 |
336-6897 Camera Gp
| 33***97 | Camera Group | 1 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
| 4J***22 | Seal-Interface Between 3rd & Tilt Valve | 1 |
286-4271 Camera Gp
| 28***71 | Camera Group | 1 |
| 7N***79 | Socket-Governor Solenoid Wire To Housing | 1 |
| 7N***80 | Pin-Connector; (14-Ga To 18-Ga) | 2 |
5n-8857 Contactor As-Water Temp
| 1S***93 | Strap; (Cable) (0.62in Dia) | 3 |
| 5N***57 | Contactor As-Water Temp | 1 |
| 5P***09 | Tube-Heat Shrink; (9.52-mm Dia)(0.03-M Each) | 0 |
5n-5725 Contactor Gp -Oil Pressure & Water Temperature
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
| 5N***25 | Contactor Group; Contactor Group Oil Pressure And Water Temperature | 1 |
| 9S***84 | Plug To Hydraulic Tank | 1 |
7c-9368 Contactor Gp-Alarm
| 5N***88 | Diode As | 2 |
| 5N***59 | Jumper-Strip | 1 |
| 7C***68 | Contactor Group-Alarm | 1 |
5n-9175 Control Gp-Voltage
| 2W***19 | Wire As | 1 |
| 3S***93 | Strap-Cable-To Tie Harnesses Together | 13 |
| 3S***89 | Bracket | 2 |
7w-6392 Conversion Gp-Wiring
| 15***57 | Kit-Connecting Plug; (12-Pin) | 1 |
| 7W***92 | Conversion Group-Wiring | 1 |
7w-8052 Diode Gp
| 15***57 | Kit-Connecting Plug; (12-Pin) | 0 |
| 7W***52 | Diode Group | 1 |
7c-6393 Fastener Gp-Wiring Harness
| 15***57 | Kit-Connecting Plug; (12-Pin) | 0 |
| 7C***93 | Fastener Group-Wiring Harness | 1 |
319-6827 Harness As-Sensor
| 15***57 | Kit-Connecting Plug; (12-Pin) | 0 |
| 31***27 | Harness As-Sensor | 1 |
319-6830 Harness As-Sensor
| 31***30 | Harness As-Sensor | 1 |
319-6828 Harness As-Sensor
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 10***05 | Kit-Receptacle; (6-Pin)(Display Monitor Harness) | 1 |
| 15***60 | Kit-Connecting Plug; (3-Pin)(Engine Sensor Wiring Harness) | 4 |
319-6829 Harness As-Sensor
| 18***80 | Kit-Seal; (Air Motor Lubricator) | 1 |
| 31***29 | Harness As-Sensor | 1 |
102-5955 Harness As-Wiring -Control Panel
| 10***55 | Harness As-Wiring; -Control Panel | 1 |
| 27***68 | Module Group-Interface | 1 |
7w-8001 Box Gp-Junction
| 25***62 | Kit-Bracket; (Camera) | 1 |
| 7W***01 | Junction Box Group | 1 |
2w-8901 Box Gp-Junction
| 2W***01 | Junction Box Group | 1 |
| 4W***01 | Junction Box Group | 1 |
| 7W***52 | Diode Group | 1 |
4w-9601 Box Gp-Junction
| 4W***01 | Junction Box Group | 1 |
172-0208 Lubricator Gp-Air Motor
| 17***08 | Lubricator Group-Air Motor | 1 |
| 1H***36 | Wire Assembly--Alternator To Engine; Wire Assembly- Alternator To Engine | 1 |
| 2A***47 | Washer; (0.656x1.125x0.688-In Thk) | 1 |
5n-8757 Sensor Gp-Speed -Engine
| 1W***70 | Switch As-Start | 1 |
| 2W***34 | Wire As | 1 |
| 5B***79 | Nut,Plain,Hexagon Governor And Decelerator Control | 1 |
274-8068 Module Gp-Interface
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 1A***73 | Bolt; (5/8-18x1.25-In) | 1 |
275-2076 Module Gp-Interface
| 17***49 | Strap; (Marker) | 1 |
| 27***76 | Module Group-Interface | 1 |
| 7N***79 | Socket-Governor Solenoid Wire To Housing | 1 |
6n-3221 Starting Motor Gp-Electric
| 03***21 | Shim Lever Housing | 1 |
| 03***23 | Bolt; (1/4-28x1-In) | 13 |
| 04***65 | Screw 19.05 mm(.750 In.) Long | 4 |
4w-9580 Mounting Gp-Contactor
| 3E***86 | Sensor Group-Speed; -Magnetic, Low Output | 1 |
| 4B***81 | Washer--Use With Customer'S Ground Bolt | 1 |
| 4W***80 | Mounting Group-Contactor | 1 |
4w-6332 Mounting Gp-Contactor
| 15***63 | Wedge-Plug Lock; (6-Pin) | 1 |
| 15***74 | Kit-Connecting Plug; (6-Pin)(Cat Electronic Display Harness) | 1 |
| 4B***81 | Washer--Use With Customer'S Ground Bolt | 1 |
3e-7886 Sensor Gp-Speed -Engine
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 14***36 | Pin-Connector; (14-Ga To 18-Ga) | 2 |
| 17***49 | Strap; (Marker) | 1 |
189-5746 Sensor Gp-Speed
| 03***17 | Washer-Spring | 2 |
| 18***46 | Sensor Group-Speed; -Low Output-Engine Timing-Transmission | 1 |
| 1L***97 | Ring-Snap; (External) | 1 |
7w-3355 Sensor Gp-Speed -Engine
| 03***17 | Washer-Spring | 2 |
| 1L***97 | Ring-Snap; (External) | 1 |
| 2W***78 | Pinion-Drive; (12-Teeth) | 1 |
1w-1223 Shutoff Gp-Electrical
| 03***17 | Washer-Spring | 2 |
| 09***33 | Bolt-Socket Head; (M5x0.8x20-mm) | 1 |
| 1L***97 | Ring-Snap; (External) | 1 |
2s-7227 Starting Motor Gp-Electric
| 20***64 | Starting Motor Group-Electric | 1 |
| 2S***27 | Starter Group-Electric; Electric Starter Group | 1 |
| 4H***69 | Gasket Starter Mtg Part Of Kit P/N 5r***25 | 1 |
4w-5106 Starting Motor Gp-Air
| 05***72 | Tee-Swivel | 1 |
| 0S***73 | Bolt (102mm Long); (1/2-13x4-In) | 2 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 2 |
5n-8744 Starting Motor Gp-Air -Lh
| 4N***59 | Gasket; (Starting Motor) | 1 |
| 5N***44 | Starting Motor Group-Air; -Lh | 1 |
| 6V***27 | Starting Motor Group-Electric | 1 |
4w-5105 Starting Motor Gp-Air
| 05***72 | Tee-Swivel | 2 |
| 17***08 | Lubricator Group-Air Motor | 1 |
| 2N***87 | Elbow-Flared Needed For Customer; (Used Without Brakesaver) | 1 |
4w-5107 Starting Motor Gp-Air
| 03***17 | Washer-Spring | 2 |
| 09***33 | Bolt-Socket Head; (M5x0.8x20-mm) | 1 |
| 11***99 | Housing-Motor | 1 |
7c-3372 Starting Motor Gp-Air
| 23***62 | Starting Motor Group-Electric | 1 |
| 4N***59 | Gasket; (Starting Motor) | 1 |
| 7C***72 | Starting Motor Group-Air; -Vane | 1 |
5n-8745 Starting Motor Gp-Air -Rh
| 4N***59 | Gasket; (Starting Motor) | 1 |
| 5N***45 | Starting Motor Group-Air; -Rh | 1 |
| 6V***90 | Starting Motor Group-Electric; (Delco Remy) | 1 |
237-1962 Starting Motor Gp-Electric
| 01***80 | Lockwasher | 2 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 2 |
6v-0927 Starting Motor Gp-Electric
| 03***23 | Bolt; (1/4-28x1-In) | 5 |
| 25***79 | Kit-Solenoid; (24-Volt)(Starting Motor) | 1 |
| 27***92 | Connector | 1 |
4n-1061 Starting Motor Gp-Electric
| 4H***69 | Gasket Starter Mtg Part Of Kit P/N 5r***25 | 1 |
| 4N***61 | Starting Motor Group-Electric | 1 |
| 6V***08 | Starting Motor Group-Electric | 1 |
6v-0501 Starting Motor Gp-Electric
| 03***21 | Shim Lever Housing | 1 |
| 03***23 | Bolt; (1/4-28x1-In) | 13 |
| 04***65 | Screw 19.05 mm(.750 In.) Long | 4 |
6n-3229 Starting Motor Gp-Electric
| 03***21 | Shim Lever Housing | 1 |
| 03***23 | Bolt; (1/4-28x1-In) | 13 |
| 04***65 | Screw 19.05 mm(.750 In.) Long | 4 |
6n-4515 Starting Motor Gp-Electric
| 03***21 | Shim Lever Housing | 1 |
| 03***23 | Bolt; (1/4-28x1-In) | 13 |
| 04***65 | Screw 19.05 mm(.750 In.) Long | 4 |
207-1556 Starting Motor Gp-Electric
| 20***56 | Starting Motor Group-Electric; (24-Volt) | 1 |
| 5N***61 | Guard | 1 |
| 5N***64 | Switch As-Toggle; (Engine Start) | 1 |
338-3454 Starting Motor Gp-Electric
| 01***80 | Lockwasher | 2 |
| 10***02 | Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness) | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 2 |
207-1549 Starting Motor Gp-Electric
| 03***21 | Shim Lever Housing | 1 |
| 04***65 | Screw 19.05 mm(.750 In.) Long | 4 |
| 0S***97 | Capscrew (1/4 - 28 Nf X 1 Gd8, Hex) | 13 |
207-1564 Starting Motor Gp-Electric
| 17***22 | Switch Group-Magnetic; -Air Inlet Heater, Start Relay | 1 |
| 17***24 | Switch Group-Magnetic; -Air Inlet Heater, Start Relay | 1 |
| 20***64 | Starting Motor Group-Electric | 1 |
6v-0890 Starting Motor Gp-Electric
| 0S***97 | Capscrew (1/4 - 28 Nf X 1 Gd8, Hex) | 5 |
| 25***79 | Kit-Solenoid; (24-Volt)(Starting Motor) | 1 |
| 28***07 | Kit-Connector; (Starting Motor) | 1 |
4n-1062 Starting Motor Gp-Electric
| 1S***51 | Terminal-Cable; (00-Ga, 1/2-In Screw) | 4 |
| 20***49 | Starting Motor Group-Electric | 1 |
| 20***64 | Starting Motor Group-Electric | 1 |
6v-0508 Starting Motor Gp-Electric
| 03***23 | Bolt; (1/4-28x1-In) | 5 |
| 19***70 | Solenoid As-Starting Motor; (24-Volt)(Starting Motor) | 1 |
| 3E***75 | Housing Assem. | 1 |
9w-1077 Switch Gp-Start
| 0T***20 | Bolt (1.25 In. Long X .438 In. Dia.) | 1 |
| 1H***69 | Button-Spring | 1 |
| 1H***70 | Chamber | 1 |
7c-9365 Switch Gp-Temperature -Water
| 10***55 | Harness As-Wiring; -Control Panel | 1 |
| 7C***93 | Fastener Group-Wiring Harness | 1 |
| 7C***65 | Switch As-Temperature; (Water Temperature) | 1 |
7w-8051 Switch Gp-Engine -Shutoff
| 7W***51 | Switch Group; -Shutoff | 1 |
| 8J***85 | Plate-Instruction; (Start Switch)(Remote) | 1 |
| 9W***77 | Switch As-Start; -Heat-Remote | 1 |
8n-6132 Switch Gp-Start
| 10***03 | Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge) | 1 |
| 18***35 | Pin-Connector; (16-Ga To 18-Ga) | 3 |
| 3E***71 | Wedge; (Receptacle Lock) (3 Pin) | 1 |
8n-5881 Switch Gp-Start
| 7N***79 | Socket-Governor Solenoid Wire To Housing | 1 |
| 7N***80 | Pin-Connector; (14-Ga To 18-Ga) | 2 |
| 7N***81 | Housing-Receptacle; (14-Ga To 18-Ga) | 1 |
175-2324 Switch Gp-Magnetic -Starting Motor
| 17***24 | Switch Group-Magnetic; -Air Inlet Heater, Start Relay | 1 |
| 3B***01 | Lockwasher (Part Of 3f***99 Switch) | 1 |
| 5L***00 | Screw (Part Of 2s***42 Assem.) | 1 |
3e-0075 Switch Gp-Magnetic -Starting Motor
| 3E***75 | Switch Group-Magnetic; -Air Inlet Heater, Start Relay | 1 |
| 8J***85 | Plate-Instruction; (Start Switch)(Remote) | 1 |
| 9W***77 | Switch As-Start; -Heat-Remote | 1 |
175-2322 Switch Gp-Magnetic -Starting Motor
| 17***22 | Switch Group-Magnetic; -Air Inlet Heater, Start Relay | 1 |
| 1D***17 | Nut-Plate And Angle Assembly To Hydraulic And Fuel Tanks; Nut Plate And Angle Assembly To Hydraulic And Fuel Tanks | 2 |
| 4J***02 | Spacer; (0.49x0.69x3.0-In Thk) | 2 |
3n-8782 Switch Gp-Remote Starting
| 3N***82 | Switch Group-Remote Starting | 1 |
| 6V***01 | Nut; (3/8-16-Thd)(Plate To Rh And Lh Bracket As) | 2 |
| 8J***85 | Plate-Instruction; (Start Switch)(Remote) | 1 |
115-8040 Switch Gp-Start
| 11***40 | Switch Group-Start; -Engine | 1 |
| 1L***99 | Marker-(Wire Code) | 1 |
| 2L***49 | Terminal-Ring 6 Ga. (No. 10 Screw) | 2 |
108-3190 Switch Gp-Temperature -Water
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 2 |
| 10***90 | Switch Group-Temperature; -Engine Coolant | 1 |
| 11***67 | Elbow | 4 |
1l-2073 Valve Gp-Pressure Reducing -Rh
| 1L***73 | Valve Group-Pressure Reducing; -Rh | 1 |
| 3N***90 | Film-Gauge Identification; (Ammeter) | 1 |
| 3N***92 | Ammeter As; (60-Ampere) | 1 |
103-1965 Wiring Gp-Panel
| 10***65 | Wiring Group-Panel | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
253-6138 Wiring Gp-Sensor -Oil, Fuel Pressure, Lh Service
| 25***38 | Wiring Group-Sensor; -Oil, Fuel Pressure, Lh Service | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
1n-8509 Wiring Gp-Alternator
| 1N***09 | Wiring Group-System; -Alternator | 1 |
| 1W***14 | Gauge-Ammeter; (Ammeter) | 1 |
| 6V***07 | Seal-Rectangular | 1 |
Engine Arrangement
238-8190 Engine Ar
| 10***59 | Pump Group-Water | 1 |
| 11***01 | Lines Group-Turbocharger Oil | 1 |
| 12***68 | Housing Group-Flywheel | 1 |
238-8191 Engine Ar
| 10***59 | Pump Group-Water | 1 |
| 11***01 | Lines Group-Turbocharger Oil | 1 |
| 12***68 | Housing Group-Flywheel | 1 |
Fuel System
5n-3220 Actuator Gp-Air -Governor Control
| 01***80 | Setscrew-Square Head | 2 |
| 0S***19 | Bolt,Machine Gear Retaining Part Of Kit P/N 1w***46 | 4 |
| 11***60 | Diaphragm | 1 |
242-4235 Control Gp-Fuel
| 12***74 | Clip-Loop; (12.7mm Id) | 1 |
| 24***05 | Control Group-Fuel Ratio | 1 |
| 24***35 | Control Group-Fuel | 1 |
240-8105 Control Gp-Fuel Ratio
| 11***68 | Retainer | 1 |
| 11***69 | Extension | 1 |
| 12***68 | Gasket-Fuel Ratio Control | 1 |
3n-8029 Control Gp-Governor
| 06***84 | Rod 7.62 cm(3 In.) Long | 1 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 4 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
6n-2846 Control Gp-Governor
| 4M***61 | Bolt-To Assemble Valve As And Plates | 2 |
| 4N***28 | Control Group-Governor | 1 |
| 6N***12 | Spacer; (Governor Control) | 1 |
4n-3828 Control Gp-Governor
| 4N***28 | Control Group-Governor | 1 |
| 4N***19 | Quadrant-Control | 1 |
| 4N***20 | Guide | 1 |
9n-3331 Torque Control Gp
| 10***31 | Fan-Alternator; (11-Blade) | 1 |
| 10***32 | Collar; (Alternator) | 1 |
| 10***62 | Kit-Alternator Terminal | 1 |
6n-3537 Torque Control Gp
| 1P***52 | Insulator,Bushing Governor | 1 |
| 1P***58 | Insulator .813mm(.032 In.) Thick | 1 |
| 2S***91 | Bar-Stop; 2.997mm(.118in)Thick | 1 |
4w-1727 Cover Gp-Fuel Transfer
| 0S***15 | Bolt 19 mm (.75 In.) Long Return Air Console To Enclosed Rops | 2 |
| 4M***03 | Packing,Preformed Hourmeter Mtg | 1 |
| 4W***27 | Cover Group-Fuel Transfer | 1 |
225-8575 Cover-Filter -Fuel Filter
| 22***75 | Cover-Filter; (Fuel Filter) | 1 |
2w-5100 Drain Gp-Fuel -Lh Lines And Alarm Switch
| 0S***88 | Bolt,Machine; Hose Assembly Mounting,Hose Assembly To Transmission,And To Torque Converter | 2 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 2 |
| 2B***04 | Clip (1.062" Long); (1/4 In Id Opening) | 2 |
2w-3986 Drive Gp-Governor & Fuel Pump
| 2W***83 | Spring; (Inner) | 2 |
| 2W***84 | Spring; (Middle) | 2 |
| 2W***85 | Spring; (Outer) | 2 |
9n-3959 Drive Gp-Governor & Fuel Pump
| 5J***93 | Bolt-12 Point Head; (1/2-13x1.75-In)(Marked Z) | 4 |
| 6N***93 | Ring | 1 |
| 6N***23 | Slide | 2 |
6n-8791 Drive Gp-Tachometer
| 2W***15 | Adapter As; (Tachometer Drive) | 1 |
| 2W***16 | Adapter As; (Tachometer Drive) | 1 |
| 4M***03 | Packing,Preformed Hourmeter Mtg | 2 |
9y-3336 Fastener Gp-Fuel Inj Pump
| 05***94 | Bolt-12 Point Head; (3/8-16x1.75-In) | 1 |
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 4 |
6n-6289 Filter Gp-Fuel -Duplex-Lh
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 3 |
| 1R***49 | Filter-Fuel; (Advanced Efficiency)(Secondary) | 3 |
| 26***89 | Indicator As; (Fuel Pressure) | 2 |
4n-6925 Filter Gp-Fuel
| 1R***49 | Filter-Fuel; (Advanced Efficiency)(Secondary) | 2 |
| 3J***07 | Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve | 1 |
| 4N***25 | Filter Group-Fuel; Filter Group-Fuel | 1 |
6n-6258 Filter Gp-Fuel -Duplex-Rh
| 03***47 | Elbow-Filtered Fuel From Based Assembly | 3 |
| 03***62 | Elbow, Swivel Nut 45 Degrees (-6) | 1 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 3 |
8h-7204 Filter Gp-Fuel
| 1L***69 | Ring-Retaining | 1 |
| 1N***83 | Base-Fuel Filter | 1 |
| 2H***29 | Ring - Retaining External | 1 |
4w-3502 Governor Gp
| 03***15 | Bolt 5t***53 Cable As To 5t***18 Lever | 4 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 1 |
| 1B***30 | Nut-- Flame Arrestor Or Adapter To Pipe Assembly | 2 |
7n-6124 Housing Gp-Fuel Pump
| 1P***32 | Ball,Bearing | 12 |
| 1P***34 | Pin,Grooved | 12 |
| 1S***99 | Dowel | 1 |
3n-6668 Lines Gp-Flexible Fuel
| 00***43 | Elbow 5wd342 - Up Including 5wd329 - 335, 5wd337 - 340 | 1 |
| 2L***31 | Connector-Pipe | 2 |
| 3N***67 | Hose Assem. | 2 |
110-5160 Lines Gp-Fuel
| 10***39 | Screw As | 6 |
| 11***60 | Lines Group-Fuel | 1 |
| 11***17 | Plate | 1 |
110-5159 Lines Gp-Fuel
| 10***31 | Plate As | 1 |
| 10***28 | Name-Plate (Name Of Machine: Zaxis210lck), Clamp As; (Non-Threaded) | 2 |
| 11***59 | Lines Group-Fuel | 1 |
248-8841 Lines Gp-Fuel
| 03***42 | Elbow Hose Assembly To | 1 |
| 03***47 | Elbow-Filtered Fuel From Based Assembly | 3 |
| 03***08 | Tee | 1 |
6n-9316 Lines Gp-Fuel Filter
| 03***42 | Elbow Hose Assembly To | 1 |
| 03***47 | Elbow-Filtered Fuel From Based Assembly | 2 |
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 1 |
6n-4609 Lines Gp-Fuel Filter
| 03***42 | Elbow Hose Assembly To | 1 |
| 03***47 | Elbow-Filtered Fuel From Based Assembly | 1 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 8 |
8n-1634 Lines Gp-Fuel Filter
| 11***85 | Seal-O-Ring; (13.94mm Id) | 12 |
| 1A***79 | Capscrew (5/16 - 18 Nc X 1 1/2 Gd5, Hex) | 1 |
| 1B***54 | Nut-Full; (5/16-18-Thd) | 12 |
239-9636 Lines Gp-Fuel Injection
| 00***43 | Elbow 5wd342 - Up Including 5wd329 - 335, 5wd337 - 340 | 1 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 2 |
| 1A***29 | Bolt (1-1/8") Tube Assembly To Transfer Drive Case | 2 |
7w-0128 Lines Gp-Fuel Injection
| 06***38 | Spacer; (11.12x19.05x7.9-mm Thk) | 4 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 4 |
239-9635 Lines Gp-Fuel Injection
| 06***38 | Spacer; (11.12x19.05x7.9-mm Thk) | 4 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 1 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 4 |
6n-3212 Mounting Gp-Primary Fuel Fltr
| 11***62 | Seal-O-Ring | 1 |
| 23***32 | Tip As | 1 |
| 27***89 | Seal-Washer | 1 |
239-9634 Nozzle As-Fuel Valve
| 23***34 | Nozzle As-Fuel Valve | 1 |
| 4N***07 | Cylinder-Servo | 1 |
| 5P***57 | Seal-O-Ring; (18.77mm Id) | 1 |
6n-5314 Piston Gp-Governor Servo
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 2 |
| 1S***40 | Dowel; (Dim 4.755mm) | 2 |
| 1W***40 | Seat-Spring | 1 |
4w-3501 Plate Gp-Governor Adapter
| 0S***18 | Bolt; (5/16-18x1-In)(Hydraulic Pump) | 3 |
| 11***18 | Seal-O-Ring; (26.64mm Id) | 12 |
| 1T***84 | Bolt-Socket Head; (5/16-18x1-In) | 1 |
4w-8680 Pump Gp-Fuel Injection
| 1W***87 | Valve As-Check; (Fuel Injection Pump) | 1 |
| 1W***71 | Bonnet-Valve | 1 |
| 4W***80 | Pump Group-Fuel Injection | 1 |
7w-0561 Pump Gp-Fuel Injection
| 13***41 | Pump Group-Fuel Priming; (Hand) | 1 |
| 1B***90 | Bolt; (5/16-18x1.375-In)(Rh Front Cover) | 1 |
| 1P***36 | Gasket; (Fuel Priming Pump)(Fuel Priming Pump) | 1 |
145-8855 Pump Gp-Fuel Priming
| 0S***17 | Bolt --Use Open Hole In Compressor Body | 2 |
| 14***55 | Pump Group-Fuel Priming | 1 |
| 2D***76 | Bearing-Flange | 1 |
4n-1101 Pump Gp-Fuel Transfer
| 13***36 | Gasket-Liquid; (8-Oz Can) | 0 |
| 1J***71 | Seal (10.52 Degrees I.D.); Seal-O-Ring -- To Adapter | 1 |
| 1W***77 | Shaft-Idler | 1 |
4w-5477 Pump Gp-Fuel Transfer
| 2N***28 | Washer; (Spring-Two Waves) | 2 |
| 2P***43 | Gasket | 1 |
| 2P***56 | Washer; (1.17x1.5x0.06-In Thk)(Flat) | 1 |
239-9637 Pump Gp-Gov, Fuel Inj & Tfr
| 23***37 | Pump Group-Gov, Fuel Inj & Tfr | 1 |
| 2N***28 | Washer; (Spring-Two Waves) | 2 |
| 2P***43 | Gasket | 1 |
239-9638 Pump Gp-Gov, Fuel Inj & Tfr
| 23***38 | Pump Group-Gov, Fuel Inj & Tfr | 1 |
| 2W***35 | Base Assem. | 1 |
| 2W***36 | Case Assem. | 1 |
2w-4234 Separator Gp-Water
| 1P***52 | Insulator,Bushing Governor | 1 |
| 1P***58 | Insulator .813mm(.032 In.) Thick | 1 |
| 2S***91 | Bar-Stop; 2.997mm(.118in)Thick | 1 |
Lubrication System
2n-8220 Breather Gp -Crankcase
| 2N***09 | Clamp; (V-Band) | 1 |
| 2N***20 | Breather Group; Breather Gp-Crankcase | 1 |
| 4F***90 | Seal (2.10" Inside Diameter) | 1 |
225-8576 Cover-Filter -Engine
| 22***76 | Cover-Filter; -Engine | 1 |
6n-6291 Fastener Gp-Gauge
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 2 |
| 2A***39 | Bolt,Machine Tube To Torque Converter And Tube To Oil Cooler | 2 |
| 5M***94 | Washer; Bracket To Tee, Bracket To Block, Tube As. To Tee, Tube As. To Oil Cooler | 2 |
4n-2481 Fastener Gp-Oil Pump Mounting -Engine
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 2 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 1 |
| 4N***81 | Fastener Group-Oil Pump Mounting; Oil Pump Mounting Fastener Group | 1 |
6n-5011 Filter Gp-Engine Oil
| 03***37 | Spacer; (10.93x19.05x25.4-mm Thk) | 1 |
| 0L***51 | Bolt Starting Engine Fuel Tank Bracket To Diesel Intake Manifold | 1 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 15 |
4n-2759 Filter Gp-Engine Oil
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 2 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 2 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 4 |
8n-1177 Gauge Gp-Oil Level (Dipstick) -Engine
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 5 |
| 11***68 | Seal-O-Ring; (15.54mm Id) | 1 |
| 23***72 | Seal-Integral | 2 |
4n-2645 Gauge Gp-Oil Level (Dipstick) -Engine
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 5 |
| 11***68 | Seal-O-Ring; (15.54mm Id) | 1 |
| 12***74 | Clip-Loop; (12.7mm Id) | 1 |
4n-2646 Lines Gp-Engine Oil
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 1 |
| 0L***52 | Capscrew (3/8 - 16 Nc X 3 1/4 Gd8, Hex) | 2 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 3 |
6n-5217 Lines Gp-Engine Oil
| 0L***65 | Stud; (3/8-16x1.75-In) | 1 |
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 4 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 4 |
6n-4485 Lines Gp-Engine Oil
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 4 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 4 |
| 0S***90 | Bolt; (3/8-16x2in)(Clip Thru Spacer To Bracket As) | 2 |
191-6199 Lines Gp-Oil
| 0L***65 | Stud; (3/8-16x1.75-In) | 1 |
| 0L***43 | Bolt 63.5 mm (3/8" X 2 1/2" -Cover Assembly To Fender | 4 |
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 4 |
302-5983 Lines Gp-Oil Supply
| 03***41 | Elbow; (7/16-20 Str Thd) | 1 |
| 03***95 | Connector-Flared | 1 |
| 03***53 | Seal-O-Ring; (08.92mm Id) | 2 |
7n-3054 Lines Gp-Oil Supply -Engine
| 03***41 | Elbow; (7/16-20 Str Thd) | 1 |
| 03***95 | Connector-Flared | 1 |
| 03***53 | Seal-O-Ring; (08.92mm Id) | 2 |
7n-3053 Lines Gp-Oil Supply -Engine
| 03***10 | Hose As | 1 |
| 03***41 | Elbow; (7/16-20 Str Thd) | 1 |
| 03***95 | Connector-Flared | 1 |
4p-2254 Lines Gp-Sump
| 03***01 | . Tube; Cyl., Elbow; (To Adapter) | 1 |
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 1 |
| 3N***11 | Hose Assem. 1.12 M(44 In.) | 1 |
4p-2253 Lines Gp-Sump
| 03***01 | . Tube; Cyl., Elbow; (To Adapter) | 1 |
| 3K***60 | Seal Pilot Manifold On; Seal To Boom Check Valve Drain | 1 |
| 3N***94 | Hose As; (Elbow To Sump Pump) | 1 |
4p-0445 Lines Gp-Sump
| 3B***59 | Elbow-- Hose Assembly To Tank | 1 |
| 3N***94 | Hose As; (Elbow To Sump Pump) | 1 |
| 4P***45 | Lines Group-Sump | 1 |
7n-3057 Lines Gp-Oil Supply -Engine
| 03***46 | Elbow, 90 Deg Adj., 1/4in. J.I.C. X 7/16in.-14 Str. Thd. | 1 |
| 03***53 | Seal-O-Ring; (08.92mm Id) | 2 |
| 13***27 | Seal-O-Ring; (19.18mm Id Base Side) | 1 |
119-8201 Lines Gp-Turbocharger Oil
| 0L***70 | Bolt (2-1/4") Filler Tube Assembly To Transfer Drive Case | 4 |
| 0S***71 | Screw,Cap,Hexagon; Tube Assembly To Turbocharger And Elbow Mounting | 4 |
| 10***17 | Tube As-Oil | 1 |
8n-0625 Mounting Gp-Sump Pump
| 0S***66 | Bolt-Pulley To Crankshaft Adapter | 2 |
| 4B***43 | Bolt -Cover To Flywheel Housing | 4 |
| 4K***67 | Nut Rear Support To Frame | 2 |
6n-1030 Pump Gp-Engine Oil
| 12***56 | Cover As-Pump | 1 |
| 1M***44 | Bolt; (3/8-16x2-1/4 In) | 2 |
| 1W***38 | Shaft As-Pump Drive; (8-Teeth) | 1 |
2n-8908 Pump Gp-Sump
| 2A***62 | Screw,Cap,Hexagon H Diode Pig Tail To Grd; (1/4-20x.625 In) | 6 |
| 2N***08 | Pump Group-Sump | 1 |
| 3N***97 | Pin-Tapered | 2 |
9y-9583 Pump Gp-Sump
| 00***70 | Nipple-Strainer To Flange | 1 |
| 0S***94 | Bolt (1 In. Long 3/8 In. Dia.); Plate Assembly To Support Assembly | 4 |
| 1L***44 | Tee | 1 |
Operator Station
8m-7892 Ammeter Gp
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
| 8M***92 | Gauge As-Ammeter; (Ammeter) | 1 |
3n-9012 Ammeter Gp
| 3L***87 | Lockwasher 7.24mm(.285in.)O.D.; (3.7x7.24x.48mm Thk) | 3 |
| 3N***12 | Gauge Group-Ammeter; (60-Ampere) | 1 |
| 4B***24 | Washer; (3.9x9.6x1.2-mm Thk) | 3 |
262-4922 Gauge Gp-Coolant Temperature -Engine
| 26***22 | Gauge Group-Coolant Temperature; -Engine | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
275-2081 Gauge Gp-Coolant Temperature -Engine
| 27***81 | Gauge Group-Coolant Temperature; -Engine | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
262-4921 Gauge Gp-Engine Oil Pressure
| 26***21 | Gauge Group-Engine Oil Pressure | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
7w-2937 Gauge Gp-Engine Oil Pressure
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
| 7W***37 | Gauge Group-Engine Oil Pressure | 1 |
275-2096 Gauge Gp-Engine Oil Pressure
| 27***96 | Gauge Group-Engine Oil Pressure | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
275-2100 Gauge Gp-Engine Percent Load
| 27***00 | Gauge Group-Engine Percent Load | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
275-2089 Gauge Gp-Fuel Consumption Rate
| 27***89 | Gauge Group-Fuel Consumption Rate | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
275-2090 Gauge Gp-Fuel Consumption Rate
| 27***90 | Gauge Group-Fuel Consumption Rate | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
275-2088 Gauge Gp-Fuel Consumption Rate
| 27***88 | Gauge Group-Fuel Consumption Rate | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
275-2085 Gauge Gp-Fuel Level
| 27***85 | Gauge Group-Fuel Level | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
262-4927 Gauge Gp-Fuel Level
| 26***27 | Gauge Group-Fuel Level | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
275-2086 Gauge Gp-Fuel Pressure
| 27***86 | Gauge Group-Fuel Pressure | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 1 |
| 6V***07 | Seal-Rectangular | 1 |
275-2092 Gauge Gp-Fuel Temperature
| 27***92 | Gauge Group-Fuel Temperature | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
262-4925 Gauge Gp-Gear Oil Pressure -Transmission
| 26***25 | Gauge Group-Gear Oil Pressure; -Transmission | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
275-2106 Gauge Gp-Gear Oil Pressure -Transmission
| 11***55 | Film-Gauge Identification; (Transmission Oil Temp) | 1 |
| 27***06 | Gauge Group-Gear Oil Pressure; -Transmission | 1 |
| 4B***49 | Nut-Valve To Bracket; 3.18mm(.125in)Thk | 2 |
275-2094 Gauge Gp-Manifold Air Temp -Inlet
| 27***94 | Gauge Group-Manifold Air Temp; -Inlet | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
275-2083 Gauge Gp-Manifold Air Temp -Exhaust
| 27***83 | Gauge Group-Manifold Air Temp; -Exhaust | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
275-2079 Gauge Gp-Manifold Pressure -Inlet
| 27***79 | Gauge Group-Manifold Pressure; -Inlet | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
3n-9011 Gauge Gp-Marine Gear Oil
| 3N***11 | Hose Assem. 45.72 cm(18 In.) | 1 |
| 3N***68 | Hose Assem. 141.5 cm(55.71 In.) | 1 |
| 3N***11 | Gauge Group-Marine Gear Oil; Marine Gear Oil Gauge Group | 1 |
262-4926 Gauge Gp-Oil Temperature -Transmission
| 1P***23 | Kit-Meter Window Service; (Window) | 1 |
| 26***26 | Gauge Group-Oil Temperature; -Transmission | 1 |
| 4M***03 | Packing,Preformed Hourmeter Mtg | 1 |
275-2098 Gauge Gp-Oil Temperature -Engine
| 1D***16 | Nut,Plain,Hexagon Clip Uoc:Bsv,Bsx | 2 |
| 27***98 | Gauge Group-Oil Temperature; -Engine | 1 |
| 2H***55 | Bolt 15.88mm(.625in.); 1.59cm(.62in.)Lg. | 2 |
275-2108 Gauge Gp-Oil Temperature -Transmission
| 03***42 | Reducer-Flared | 1 |
| 03***95 | Connector-Flared | 1 |
| 06***58 | Tee Hose Assembly To | 1 |
7c-8984 Lines Gp-Instrument Panel -Rh
| 03***42 | Reducer-Flared | 1 |
| 03***95 | Connector-Flared | 1 |
| 03***35 | Spacer; (0.438x1.0x0.188-In Thk) | 2 |
7c-3433 Meter Gp-Service
| 23***37 | Sender As-Pressure; (Marine Gear Oil) | 2 |
| 2D***25 | Tee-To Shut-Off Control Group | 4 |
| 2W***11 | Gauge-Ammeter; (Ammeter) | 2 |
4n-2328 Meter Gp-Service
| 4N***28 | Meter Group-Service; Meter Group-Service | 1 |
| 5K***06 | Bolt-Plt; (5/16unc X 5/8) | 2 |
| 6V***89 | Nut-Full (5/16 X 18 Thd) | 2 |
6n-6306 Mounting Gp-Instrument Panel
| 23***37 | Sender As-Pressure; (Marine Gear Oil) | 1 |
| 2D***25 | Tee-To Shut-Off Control Group | 2 |
| 2W***11 | Gauge-Ammeter; (Ammeter) | 1 |
8n-7438 Mounting Gp-Instrument Panel -Lh
| 20***21 | Indicator | 1 |
| 21***13 | Adapter | 1 |
| 2D***25 | Tee-To Shut-Off Control Group | 1 |
7l-4535 Mounting Gp-Tachometer
| 03***42 | Reducer-Flared | 1 |
| 06***58 | Tee Hose Assembly To | 1 |
| 1L***61 | Plug (Use Without Ammeter); (Mtd. On Instr. Panel) | 1 |
6n-9685 Panel Gp-Instrument -Lh
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6N***85 | Panel Group-Instrument; -Lh | 1 |
| 9B***33 | Lockwasher; (Int'L Tooth) | 2 |
5n-8283 Panel Gp-Instrument
| 19***48 | Tachometer Group | 1 |
| 5N***83 | Panel Group-Instrument | 1 |
| 6V***77 | Nut (8-32 Thd) | 2 |
6n-9039 Panel Gp-Instrument -Rh
| 19***47 | Tachometer Group-Electric | 1 |
| 6N***39 | Panel Group-Instrument; -Rh | 1 |
| 6V***77 | Nut (8-32 Thd) | 2 |
5n-8282 Panel Gp-Instrument
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 5N***82 | Panel Group-Instrument | 1 |
| 9B***33 | Lockwasher; (Int'L Tooth) | 2 |
5n-8281 Panel Gp-Instrument
| 03***42 | Reducer-Flared | 1 |
| 06***58 | Tee Hose Assembly To | 1 |
| 1L***61 | Plug (Use Without Ammeter); (Mtd. On Instr. Panel) | 1 |
262-4920 Speedometer Gp
| 26***20 | Speedometer Group | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
262-4919 Tachometer Gp-Electric
| 26***19 | Tachometer Group-Electric | 1 |
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
7c-1072 Tachometer Gp-Electric
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
| 7C***72 | Tachometer Group-Electric | 1 |
7e-3156 Tachometer Gp-Electric
| 4B***43 | Nut,Plain,Hexagon Plate Mtg | 2 |
| 6V***07 | Seal-Rectangular | 1 |
| 7E***56 | Tachometer Group-Electric | 1 |
262-4923 Voltmeter Gp
| 10***02 | Film; (Coolant Information) | 1 |
| 11***52 | Plate & Film Group; -Engine Information | 2 |
| 17***80 | Film Group | 1 |
275-2110 Voltmeter Gp
| 27***10 | Voltmeter Group | 1 |
275-2112 Voltmeter Gp
| 27***12 | Voltmeter Group | 1 |
262-4924 Voltmeter Gp
| 26***24 | Voltmeter Group | 1 |
Service Equipment And Supplies
6l-4502 Chart-Plate & Film
| 6L***02 | Chart-Plate & Film | 1 |
286-9119 Film Gp
| 28***19 | Film Group | 1 |
115-5852 Plate & Film Gp -Engine Information
| 11***52 | Plate & Film Group; -Engine Information | 1 |
3412D serial number reference
On these mechanically-governed 3400-series marine engines, the serial data plate sits on the valve cover or timing cover at the front of the engine, listing the Engine Serial Number and Arrangement Number; the same serial is also stamped directly into the block on the forward, port (left) side. Read the first three letters as the prefix, which identifies the specific engine build and configuration; the digits that follow are the sequential unit number within that build.
| Prefix | Identifies | Notes |
|---|---|---|
| REA | 3412D Marine Engine - DITTA (twin turbocharged, aftercooled) | Identified prefix for the D-generation V12 marine propulsion engine. Real-world units in this prefix run a twin-turbo aftercooled (DITTA) rating from roughly 560 to 630 kW (750 to 850 bhp). Units seen carry build dates around late 2004. The prefix opens at REA1-Up with no published end break, so later serials may extend beyond that batch. Separate from the plain 3412, 3412C, and 3412E marine engines, each of which carries its own distinct prefix set - do not cross-apply those to the 3412D. |
Frequently asked questions
What engine is the Caterpillar 3412D marine?
It's a Caterpillar 3400-family V12 four-stroke diesel: 27 L (1,649 cu in) displacement, 137 mm x 152 mm (5.4 in x 6.0 in) bore and stroke, direct injection with a mechanical/hydromechanical governor, turbocharged and aftercooled (DITA, with twin-turbo builds on the higher-output ratings). It is not the electronically controlled 3412E, and it predates Caterpillar's ACERT-era C27.
How much does a Caterpillar 3412D marine engine weigh?
Dry weight runs roughly 2,300-2,800 kg (5,100-6,100 lb) depending on the power rating and accessory package, before the reduction gear or marine gear is added. Add coolant, lube oil, and any wet-mounted accessories for an in-service (wet) weight, and confirm the exact figure against the nameplate rating for your unit since it varies by configuration.
What replaced the Caterpillar 3412D marine engine?
Inside the 3412 family it ran alongside the electronically controlled 3412E. In Caterpillar's marine catalog, the 3412D's slot was eventually taken over by the ACERT-generation C27 (and the larger C32 at the high end), which carried the same 27 L displacement forward under electronic engine management.
What 3412D owners discuss
How much power does the 3412D marine engine actually make?
Cat rated 3412D marine propulsion engines across duty classes A through E. Continuous-duty A/B ratings hold lower power for 24-hour running (tugs, trawlers); high-performance E ratings for pleasure craft push more power for short bursts. One common continuous propulsion rating documented is about 460 bkW (617-626 bhp) at 1800 rpm. Horsepower varies by rating class and reduction gear - match the plate rating to the boat's real duty cycle, not just the horsepower figure. Two engines both stamped "3412D" can carry very different life expectancy if one is A-rated and the other E-rated.
Why do owners say the 3412D dodged the aftercooler-core problem common on other 3412 variants?
Seawater-cooled 3412 variants run raw saltwater directly through the aftercooler core, and Cat's own service directive called for replacing that core on a roughly 6-year interval due to corrosion and erosion - an expensive job. The 3412D instead uses a coolant-cooled aftercooler, so the core sits in the fresh coolant loop rather than the raw seawater path. Mechanics note this cuts down the corrosion-driven aftercooler failures seen on other 3412 variants. The raw seawater side of the heat exchanger and oil cooler still needs normal saltwater maintenance and zinc anode replacement.
What's the injection and governor setup on the 3412D, and what quirks come with it?
The 3412D uses Cat's PEEC (Programmable Electronic Engine Control): mechanical unit injectors with an electronically actuated rack and governor, not the hydraulic HEUI injection used later on 3412E. PEEC must finish its startup self-check and come out of "cold mode" before throttle response is normal. A common no-fault-code complaint is a stuck or unresponsive throttle traced to the control head signal, a corroded connector, or chafed low-voltage sensor wiring rather than the ECM itself. A mechanically stuck rack usually points to a worn or failed drive to the governor flyweight assembly, not the injectors. Have your dealer verify whether a throttle fault is electronic or mechanical before replacing parts.
What wear patterns show up on high-hour 3412D engines?
The failure chain mechanics report most is cooling- and lubrication-related more than pure hours. Coolant or water intrusion into the oil drives bearing shell cavitation, erosion, and crankshaft scoring. Blocked or scaled heat exchangers and a worn raw water pump impeller push operating temperature up and accelerate oil breakdown, showing up as knocking and metal in the oil in advanced cases. Turbo bearings and shafts wear steadily, especially after any period of oil starvation. On engines with a rough rebuild history, overtightened fasteners and fittings forced into non-threaded holes point to prior amateur work, not a design fault.
What electrical and sensor issues come up most on this engine?
Because the 3412D runs PEEC's electronic governor rather than a straight mechanical linkage, sensor and wiring faults present as driveability problems: throttle-response trouble traced to the control head or its harness, corroded terminals in the damp engine room, and chafed low-voltage sensor supply wiring routed near hot exhaust or fuel-return sections. None of these are unique design flaws - they're standard marine wiring-harness wear items - but they get misdiagnosed as fuel or governor problems when a tech skips the electronic self-check first. Have your dealer pull ECM fault history before replacing mechanical fuel-system parts.
What's the recurring feedback on turbocharger life in marine service?
Turbo condition is one of the most frequently flagged wear items across the 3412 family in saltwater service, including reports of full seizure, internal corrosion pitting, and oil migrating into the charge-air side from worn seals. Owners describe gradually falling boost, rising exhaust temperature, and blue-black smoke under load rather than sudden failure. Because the 3412D's aftercooler runs on coolant rather than raw seawater, corrosion carried from a failed aftercooler core into the charge-air side is less of a factor than on seawater-cooled siblings, but turbo bearing wear itself is an hours-and-maintenance item common to the whole family. Have your dealer verify boost and exhaust pyrometer readings against the baseline for the specific rating before condemning a turbo.
What should a buyer check before purchasing a used 3412D?
Confirm the duty rating (A through E) stamped on the engine plate and compare it against how the boat was actually run - a pleasure-craft E-rated engine worked like a commercial A-rated engine shows wear well ahead of its hour meter. Ask for records covering coolant type and change history (contaminated coolant is tied to bearing and liner damage), oil analysis history, raw water pump impeller and zinc anode intervals, and any turbo or injector work. On a sea trial, watch for smooth PEEC throttle response with no hesitation once out of cold mode, steady oil pressure and coolant temperature at cruise and wide-open throttle, and normal exhaust smoke color under load. Have a qualified marine diesel mechanic or your dealer pull ECM fault history and inspect the aftercooler and heat exchanger cores before closing the deal.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
Serial-range & configuration variants
This page covers the Caterpillar 3412D. Related factory variants of the same model family:
3412D
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