Caterpillarpipelayer(no series)
Caterpillar 594
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 594 is a crawler-tractor-based sideboom pipelayer built for lifting and moving large-diameter pipe along a pipeline right-of-way. Caterpillar built it in two factory generations on the same D9-lineage chassis and undercarriage: the base 594 (serial prefix 62H, roughly 1966-1975) ran a naturally aspirated Cat D353 inline-six diesel rated around 385 hp; the 594H (serial prefix 96V, roughly 1975-1986) carried a turbocharged and aftercooled D353TA making about 410 hp (306 kW). Both generations use a power-shift transmission with a torque divider, driving through steering clutches and final drives from the same driveline family as Cat's D9-class dozer, and both control the sideboom hoist and lowering rigging with mechanical clutch-and-brake drums rather than hydraulics. Operating weight runs roughly 121,500-123,600 lb (about 55,100-56,000 kg) depending on boom length and counterweight rigging, with rated maximum lift around 200,000 lb (90,700 kg). Caterpillar offered the line with different boom lengths and counterweight packages to match pipe diameter and reach on a given job.
The 594H's turbocharged D353TA lifted output roughly 25 hp over the base 594 without changing the core chassis, torque divider, or mechanical hoist system, so the two generations share most structural and undercarriage parts even though their engine internals differ. Caterpillar closed out this mechanical, clutch-and-brake sideboom design - 594H included - by 1986; no later factory model carried the '594' name forward, and the company's larger pipelayers moved to hydraulically operated, high-drive designs after that. In the used and parts market the 594/594H stays relevant because of that D9-family driveline and undercarriage commonality: sprockets, rollers, idlers, final drive components, and torque-divider parts overlap with a widely supported dozer platform, which keeps a rebuilt 594 economically viable long after Cat stopped building new ones. Pipeline contractors still run overhauled units where mechanical simplicity and rebuild cost beat buying new.
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 594 specifications
Engine
| Engine model | Cat D353, inline-six diesel. The base 594 (serial prefix 62H, roughly 1966-1975) is documented at approximately 385 hp with a naturally aspirated D353; the related 594H (serial prefix 96V, roughly 1975-1986) steps up to a turbocharged and aftercooled D353TA at approximately 410 hp (306 kW). Many spec listings show the 410 hp/turbocharged figures under the plain "594" name — treat those as likely 594H figures and confirm engine and rating against the machine's own data plate. |
| Configuration | Inline 6-cylinder diesel, overhead valve |
| Gross/net power | Approximately 385 hp for the base 594 (naturally aspirated D353), per period spec sheets. Figures of 305-306 kW (410-416 hp) appear widely under the "594" name but track closely to the confirmed 594H D353TA rating — verify which generation and engine a specific machine carries before relying on a horsepower figure. |
| Displacement | Approximately 24.2-24.6 L (1,473-1,502 cu in) for the D353 family shared across both generations. Bore 159 mm (6.25 in) x stroke 202-203 mm (8.0 in). |
| Emissions tier | Not applicable. Mechanically governed diesel from the 1975–1986 production era, predates EPA/EU nonroad emission tier standards. |
Weights
| Operating weight | Approximately 55,100–56,000 kg (121,500–123,600 lb). Figure varies by counterweight and boom configuration and by listing source. |
| Gross weight, full counterweight/transport package | Up to about 146,200 kg (322,300 lb) reported for a fully rigged sideboom unit carrying its complete counterweight set. This is a configuration-specific transport figure, not a standard base-machine catalog weight — treat with caution. |
| Ground pressure | Not published in available spec sheets. |
Dimensions
| Overall length | 5.49–5.94 m (18'0"–19'6"). Varies by source and boom configuration. |
| Width over tracks (base undercarriage) | 2.29 m (7'6") |
| Overall transport width, sideboom configuration | Up to about 4.47–4.62 m (14'8"–15'2") with side boom and counterweights mounted. |
| Height to top of cab | 3.11 m (10'2") base configuration; up to 3.91 m (12'10") reported for a fully equipped sideboom configuration. |
| Track gauge | 2.54 m (100 in) |
| Track length on ground | 3.35 m (11'0") |
| Boom length | 7.32 m (24 ft) |
Performance
| Max lift capacity | 90,700 kg (200,000 lb) rated maximum for the sideboom attachment. |
| Travel speed | Not documented in available spec sheets for this exact configuration. Power-shift transmission with multiple forward/reverse ranges is referenced in dealer listings, but numeric speed values are not published — verify with the operation and maintenance manual or a dealer. |
| Gradeability | Not published. |
Service capacities (summary)
| Fuel tank | Approximately 760 L (200 US gal), reported for the sideboom configuration. Not corroborated by every spec listing — treat as approximate. |
| Hydraulic system | Fluid capacity approximately 120 L (31.8 US gal). Variable-displacement, load-sensing pump with maximum flow around 286 L/min (75.6 gpm) at a maximum relief-valve pressure around 320 bar (4,640 psi). |
| Engine oil | Not documented for this specific application — verify with the operation and maintenance manual or a dealer. |
| Cooling system | Not documented for this specific application — verify with the operation and maintenance manual or a dealer. |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
594 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) - Cat D353 diesel (naturally aspirated on the base 594; turbocharged/aftercooled D353TA on the later 594H generation) | Not published in any accessible spec sheet for this serial range. One unverified secondary reference for the D353 engine family cites roughly 60 L (16 US gal) for a complete oil-and-filter service fill - treat as indicative only, not confirmed, and check the dealer OMM copy for the exact figure. | Caterpillar diesel engine oil, graded by ambient temperature per Cat's standard chart - lighter SAE 10W grade in cold climates ranging up to SAE 40 in hot climates. Exact grade letter and API/Cat spec not confirmed for this machine; verify in the OMM. |
| Cooling system | Not documented in any accessible source for the 594 or 594H serial ranges reviewed. Verify against the dealer OMM copy. | Caterpillar heavy-duty diesel engine coolant/antifreeze, mixed per Cat's standard water-glycol ratio for the machine's climate. Specific Cat coolant product name not confirmed for this machine in the sources reviewed. |
| Fuel tank | 760 L (about 200 US gal / 167 imp gal) - documented repeatedly for 594H-designated units of this generation (late-1970s to mid-1980s listings). Not independently confirmed for the base 594; treat as varies by configuration/series. | Diesel fuel per Cat's standard No. 2-D specification. No branded fuel additive named in the sources reviewed. |
| Transmission (3-speed power shift with torque converter/clutch) | Not documented in any accessible source for this machine. Verify against the dealer OMM copy. | Caterpillar Transmission/Drive Train Oil (Cat TDTO) - the standard fill Cat specifies for its power-shift transmissions, final drives, and wet-brake compartments of this class and era. |
| Final drives (each side) | Not documented in any accessible source for this machine. Verify against the dealer OMM copy. | Caterpillar TDTO, same spec family as the transmission fill, per Cat's standard practice of sharing one drive-train oil spec across transmission, final drives, and brakes on crawler-based power-shift machines. |
| Hydraulic system and tank | 120 L (31.8 US gal, commonly rounded to about 32 US gal) tank capacity - cross-verified across multiple independent spec listings for the 594. | Caterpillar Hydraulic Oil (Cat HYDO family), grade selected by ambient temperature per Cat's standard viscosity chart. Exact grade split by climate not documented in the sources reviewed. |
| Grease points (spec only) | No reservoir capacity - lubricated by grease gun at scheduled service intervals at boom, pins, bushings, and undercarriage points. | Caterpillar multipurpose grease (Cat MPGM), NLGI 2 lithium-complex - Cat's standard grease spec for crawler-based pipelayers of this era. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 594 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 6,000 h |
|
Servicing the 594 beyond the schedule
Predictive Maintenance & Fluid Analysis
The 594/594H runs fully mechanical fuel injection and analog gauges - no ECM, no fault codes. Predictive work means reading the panel (oil pressure, coolant temp, torque-divider oil temp) at every start and pulling scheduled oil samples from the D353/D353TA crankcase, power-shift transmission, and final drives. Watch sample trends for coolant intrusion around the 594H's turbocharger seals and for metal in torque divider oil, the earliest sign of clutch pack wear. Treat gauge drift as a real fault, not a sensor glitch.
Corrective & Common Repairs
Boom hoist and lowering brake band relining is the highest-frequency repair; drum scoring from overheated bands shows up on machines run hard lifting pipe. Steering clutch and torque divider clutch pack wear presents as slipping under load. Injection pump and nozzle service keeps the D353/D353TA running clean; on 594H units, turbocharger seal and bearing wear lets oil into the intake. Track pin, bushing, and roller wear from right-of-way travel is routine, not exceptional, on this driveline.
Overhaul & Rebuild Points
Major rebuild targets are the D353/D353TA (liners, pistons, bearings, injection pump, and turbocharger cartridge on the 594H), the torque divider and power-shift clutch packs, and the boom hoist drum, bands, cable, and sheaves. Undercarriage rebuild - sprockets, rollers, idlers, pins, and bushings - follows D9-family wear-limit charts since the chassis shares that lineage. Inspect boom, A-frame, and counterweight welds at every major rebuild; these structural points carry the highest cyclic load on the machine.
Seasonal & Environment Servicing
Cold-climate starts need coolant concentration checked, block heater use, and fuel treated against gelling before the D353/D353TA will crank reliably - there's no electronic cold-start assist to fall back on. Hot, dusty right-of-way work loads the radiator core and air intake precleaner fast; clean both more often than the base interval calls for. Wet or soft ground calls for wider track shoes and closer track-sag checks to keep a loaded sideboom stable underfoot.
594 common service parts
| Part number | Part | Notes | |
|---|---|---|---|
| 2M-7828 | Fuel Filter | Fuel system service | Check fitment → |
| 6H-6000 | Film-Warning Left Side Of Filter Opening On Seat Frame | Scheduled service item | Check fitment → |
Always confirm against your machine's serial number — cross-check any part in Heavy Parts AI before ordering.
594 attachments & work tools
Sideboom crane arm (boom) and load/boom hoist drums
The 594 is a crawler sideboom pipelayer, not a boom-attachment machine in the excavator sense — the boom itself is the primary work tool, offered in a choice of lengths for this lift class. For this size class the reeving is typically a multi-part line (around 5 parts of line) using roughly 19 mm wire rope, with drum capacity in the 70-75 m range; separate hoist drums handle boom angle and load independently.
Counterweight system
Rear-mounted counterweight on a pivoting linkage (four-bar type on hydraulically controlled versions) that swings out to add stability opposite the suspended load. Weight is built up from removable counterweight leaves (roughly 600-650 kg / ~1,400 lb each for this class), stacking to a total extendable counterweight near 15,000 kg (about 33,000 lb) depending on job requirements — verify exact leaf count and weight for a specific unit.
Hook block and load block
Size-matched load blocks for the 561-594 pipelayer class share common features: flame-hardened sheave grooves, roll guards over the sheaves, and a rotating hook fitted with a safety latch. Block selection is matched to wire rope size and reeving, not a bolt-on "attachment" choice — it is specified with the machine.
Boom/counterweight mounting to base tractor
The pipelayer package (A-frame, upper and lower hardbar, boom, and counterweight assembly) bolts and pins directly to the base crawler tractor's frame rails as an integrated conversion rather than using a quick-coupler system. Factory-built 594 units (serial prefix 62H, production beginning mid-1960s) were assembled this way on a D9-class Cat crawler chassis; the same mounting approach is used by aftermarket rebuilders converting Cat D7-D9 class (and comparable Komatsu D155-class) crawlers into 594-lift-class sideboom pipelayers.
Hydraulic control kit / arrangement
Later and remanufactured/converted machines in this lift class use a hydraulic kit to drive the boom and load functions in place of older cable/clutch control: a variable-displacement, load-sensing pump feeding the boom and load winches, typical maximum flow around 286 L/min (75 gal/min) and working pressure near 320 bar (4,640 psi), with a hydraulic reservoir in the 120 L (32 gal) range. This hydraulic arrangement is associated with the later 594-class hydraulic pipelayer generation and with hydraulic conversion kits fitted to earlier cable-controlled 594 units — treat it as a series/configuration option rather than a universal factory spec for every 594 built.
Controls and cab guarding
Hydraulically controlled units use multi-axis joystick control for simultaneous boom and load functions, plus separate lever-operated remote valves for the counterweight swing and a two-speed function. Operator station is fitted with a rollover protective structure (ROPS); factory literature for this pipelayer class also notes wire-rope reeving sized to meet standard sheave pitch-diameter guidance (sheave pitch diameter at least about 18 times nominal rope diameter) for the boom hoist reeving.
Engine / power rating — series-dependent, verify by data plate
Sources disagree here and likely reflect two different eras sold under related model numbers: the original cable/clutch-controlled 594 (mid-1960s to mid-1970s) is documented at roughly 385 hp, while the later hydraulically controlled generation in this same 200,000 lb lift class is documented at roughly 410 hp with a large-displacement Cat diesel. Several spec aggregators publish the 410 hp / hydraulic-system figures under the plain "594" name, which may actually describe the later hydraulic-generation machine — confirm engine model and control type against the data plate and serial prefix rather than the model name alone.
All 594 assemblies by section
Every catalogued assembly group for the Caterpillar 594. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Attachments
9s1932 Cover Group
| 9S***32 | Cover Group | 1 |
9s8366 Alternator Arrangement--24 Volt, 50 Ampere
| 8M***92 | Gauge As-Ammeter; (Ammeter) | 1 |
| 9S***74 | Circuit Breaker As; (60-Ampere)(Alternator) | 1 |
| 9S***66 | Alternator Arrangement | 1 |
9s8998 Alternator Group--24 Volt, 50 Ampere
| 9S***98 | Alternator Group | 1 |
Battery And Wiring (9s5378 N/S)--12 Volt--As Viewed From Right Hand Side Of Machine--Type 2--Part 2 Of 2
| 9S***78 | Battery And Wiring | 1 |
Battery And Wiring (9s5378 N/S)--12 Volt--Top View--Type 1--Part 1 Of 2
| 9S***78 | Battery And Wiring | 1 |
Battery And Wiring (9s5378 N/S)--12 Volt--As Viewed From Right Hand Side Of Machine--Type 1--Part 2 Of 2
| 9S***78 | Battery And Wiring | 1 |
Battery And Wiring (9s5378 N/S)--12 Volt--Top View--Type 2--Part 1 Of 2
| 9S***78 | Battery And Wiring | 1 |
Battery Box (9s5326 N/S)
| 9S***26 | Battery Box | 1 |
1p8678 Protection Cover Group--Fuel Tank Cap
| 1P***78 | Cap Group-Protection; Protection Cover Group Fuel Tank Cap | 1 |
9s2604 Complete Gasoline Starting Arrangement
| 0L***29 | Bolt- 7.63 cm(3 In.) Long - Location "H" | 2 |
| 0S***87 | Bolt-Bracket Assembly To Timing Gear | 1 |
| 0S***91 | Screw,Cap,Hexagon Bearing Retainer; Part Of Kit P/N 1w***82 | 1 |
2s3025 Protection Cover Group--Oil Filler Cap
| 2S***25 | Cover Group-Protection; Protection Cover Group | 1 |
2s6096 Protection Cover Group--Radiator Cap
| 2S***96 | Cover Group-Protection; Protection Cover Group-- Radiator Cap | 1 |
1p6382 Cylinder Head Assembly--Field Installation
| 1P***82 | Cylinder Head As | 1 |
1s4793 Fan Group--Reversible Blade
| 1S***93 | Fan Group | 1 |
9s1025 Field Conversion Lubrication System--18 Gallons Per Minute--Part 2 Of 2
| 9S***25 | Field Conversion Lubrication System | 1 |
9s1025 Field Conversion Lubrication System--18 Gallons Per Minute--Part 1 Of 2
| 9S***25 | Field Conversion Lubrication System | 1 |
2m856 Flood Lamp Assembly--12 Volt
| 2M***56 | Flood Lamp Assembly | 1 |
7s6281 Gasoline Starting Engine Arrangement
| 3S***64 | Oil Pump Group | 1 |
| 3S***77 | Manifold Carburetor And Air Cleaner Group | 1 |
| 7M***93 | Electric Starter Group | 1 |
1p1447 Generator Group--12 Volt, 24 Ampere
| 1P***47 | Generator Group | 1 |
8f9866 Grease Gun--Type 2
| 8F***66 | Grease Gun As | 1 |
8f9866 Grease Gun--Type 1
| 8F***66 | Grease Gun As | 1 |
9s9999 High Speed Oil Change Group
| 9S***99 | High Speed Oil Change Group | 1 |
5s8658 Front Pull Hook Group
| 5S***58 | Hook Group-Front Pull | 1 |
7j602 Hydraulic Pump Assembly
| 7J***02 | Hydraulic Pump Assembly | 1 |
1m1882 Flood Lamp Assembly--24 Volt--Type 1
| 1M***82 | Lamp Group | 1 |
1m1882 Flood Lamp Assembly--24 Volt--Type 2
| 1M***82 | Lamp Group | 1 |
8s5339 Lighting System--24 Volt, 4 Lamp--Top View--Part 2 Of 2
| 8S***39 | Lighting System | 1 |
4s5014 Lighting System Group--12 Volt, 4 Lamp--Top View--Part 2 Of 2
| 4S***14 | Lighting System | 1 |
8s5339 Lighting System--24 Volt, 4 Lamp--Top View--Part 1 Of 2
| 8S***39 | Lighting System | 1 |
4s5014 Lighting System Group--12 Volt, 4 Lamp--Top View--Part 1 Of 2
| 4S***14 | Lighting System | 1 |
8s5441 Muffler Group
| 8S***41 | Muffler Group | 1 |
Name Plates And Transfer
| 2M***84 | Plate (Caution); Plate --Caution | 1 |
| 2M***31 | Plate; Serial Number On R.H. Side Of Cylinder Block And R.H. Side Of Loader Frame | 3 |
| 2P***45 | Plate-- Lubrication | 1 |
1p1 Oil Pan Service Group--Field Installation
| 1P***01 | Oil Pan Service Group | 1 |
2s2787 Protection Cap Group--Starting Engine Fuel Tank
| 2S***87 | Protection Cap Group | 1 |
5s8033 Protection Cover Group--Fuel Tank Cap
| 5S***33 | Protection Cover Group | 1 |
1s6307 Protection Cover Group--Fuel Tank Cap
| 1S***07 | Protection Cover Group | 1 |
7s7400 Scavenge And Circulating Pump Group
| 7S***00 | Pump Group-Scavenge & Circulating | 1 |
8s2802 Radiator Core Protector Grid Group--Type 1
| 8S***02 | Radiator Core Protector Grid Group | 1 |
8s2802 Radiator Core Protector Grid Group--Type 2
| 8S***02 | Radiator Core Protector Grid Group | 1 |
1s4153 Rain Cap Group--Starting Engine
| 1S***53 | Rain Cap Group | 1 |
7s6285 Sand Blast Grid Group
| 7S***85 | Sand Blast Grid Group | 1 |
8s3202 Sand Blast Grid Group--Field Installation
| 8S***02 | Sand Blast Grid Group | 1 |
2m2832 Seat Belt Group
| 2M***32 | Seat Belt Group | 1 |
9m21 Tool Group
| 9M***21 | Tool Group | 1 |
Tools
8s4308 Torque Converter Oil Cooler And Lines Group--Field Installation
| 8S***08 | Torque Converter Oil Cooler And Lines Group | 1 |
1p1546 Track Group--40" Grouser Shoe--2 Required
| 1P***46 | Track Group | 1 |
1p1545 Track Group--34" Grouser Shoe--2 Required
| 1P***45 | Track Group | 1 |
8s1747 Track Group--34" Grouser Shoe--2 Required
| 8S***47 | Track Group | 1 |
7s9136 Track Group--40" Grouser Shoe--2 Required
| 7S***36 | Track Group | 1 |
7s9135 Track Group--30" Grouser Shoe--2 Required
| 7S***35 | Track Group | 1 |
7s7342 Track Group--30" Grouser Shoe--2 Required
| 7S***42 | Track Group | 1 |
8s1741 Track Group--40" Grouser Shoe--2 Required
| 8S***41 | Track Group | 1 |
4s7654 Track Group--40" Grouser Shoe--2 Required
| 4S***54 | Track Group | 1 |
4s7645 Track Group--30" Grouser Shoe--2 Required
| 4S***45 | Track Group | 1 |
7s7343 Track Group--40" Grouser Shoe--2 Required
| 7S***43 | Track Group | 1 |
9s2326 Water Pressure Gauge Group--Field Installation
| 9S***26 | Water Pressure Gauge Group | 1 |
Wiring Diagram--12 Volt System
9s9565 Wiring Harness--12 Volt
| 9S***65 | Wiring Harness | 1 |
Diesel Engine
Aftercooler (9s2625 N/S)
| 9S***25 | Aftercooler | 1 |
Aftercooler (7m895 N/S)
| 7M***95 | Aftercooler | 1 |
Air Cleaner
Air Cleaner (3s4530 N/S)
| 3S***30 | Air Cleaner | 1 |
Air Cleaner (7s3686 N/S)
| 7S***86 | Air Cleaner | 1 |
Air Cleaner Indicator (3s4734 N/S)
| 3S***34 | Air Cleaner Indicator Group | 1 |
Belt Tightener (2s9014 N/S)
| 2S***14 | Belt Tightener | 1 |
Blower Fan And Guard (7s5907 N/S)
| 7S***07 | Blower Fan And Guard | 1 |
Blower Fan And Shroud (5s5206 N/S)
| 5S***06 | Blower Fan And Shroud | 1 |
Blower Fan And Shroud
Camshaft
Camshaft And Power Take-Off Idler Gears
Compression Release Control (4s6610 N/S)
| 4S***10 | Compression Release Control | 1 |
Connecting Rod And Piston (7m4922 N/S)--6 Required
| 7M***22 | Connecting Rod And Piston | 1 |
Connecting Rod And Piston (6l4937 N/S)--6 Required
| 6L***37 | Connecting Rod And Piston Group; Connecting Rod & Piston Group | 1 |
Crankshaft (5s5156 N/S)
| 5S***56 | Crankshaft | 1 |
Crankshaft (5m9179 N/S)
| 5M***79 | Crankshaft | 1 |
Crankshaft Bearing Replacement Groups
Cylinder Head And Valve Mechanism (5h1102 N/S)--Side View--Part 1 Of 2
| 5H***02 | Cyl Head & Valve Mechanism Group | 1 |
Cylinder Head And Valve Mechanism (5h1102 N/S)--End View--Part 2 Of 2
| 5H***02 | Cyl Head & Valve Mechanism Group | 1 |
Cylinder Block And Covers (8s8081 N/S)--Side View--Part 1 Of 2
| 8S***81 | Cylinder Block And Covers | 1 |
Cylinder Block And Covers--Rear View--Part 2 Of 2
Cylinder Block And Covers (5s1720 N/S)--Rear View--Part 2 Of 2
| 5S***20 | Cylinder Block And Covers | 1 |
Cylinder Block And Covers (8s8081 N/S)--End View--Part 2 Of 2
| 8S***81 | Cylinder Block And Covers | 1 |
Cylinder Block And Covers--Side View--Part 1 Of 2
Cylinder Block And Covers (5s1720 N/S)--Side View--Part 1 Of 2
| 5S***20 | Cylinder Block And Covers | 1 |
5s5098 Cylinder Block Assembly--Type 1
| 5S***98 | Cylinder Block Assembly | 1 |
4m7000 Cylinder Block Assembly
| 4M***00 | Cylinder Block Assembly | 1 |
Cylinder Block Assembly (8s8068 N/S)
| 8S***68 | Cylinder Block Assembly | 1 |
5s5098 Cylinder Block Assembly--Type 2
| 5S***98 | Cylinder Block Assembly | 1 |
Cylinder Head And Valve Mechanism (9s2605 N/S)--End View--Part 2 Of 2
| 9S***05 | Cylinder Head And Valve Mechanism | 1 |
Cylinder Head And Valve Mechanism--End View--Part 2 Of 2
Cylinder Head And Valve Mechanism (9s2605 N/S)--Side View--Part 1 Of 2
| 9S***05 | Cylinder Head And Valve Mechanism | 1 |
Cylinder Head And Valve Mechanism--Side View--Part 1 Of 2
Oil Pump Drive (5h1429 N/S)
| 5H***29 | Drive Group-Pump; Oil Pump Drive Group | 1 |
Exhaust Extension
Exhaust Extension (5m8288 N/S)
| 5M***88 | Exhaust Extension | 1 |
Fan And Drive Support (7s5908 N/S)
| 7S***08 | Fan And Drive Support | 1 |
8m4665 Fan Drive Clutch Assembly
| 8M***65 | Fan Drive Clutch Assembly | 1 |
5h1111 Breather And Oil Filler Group
| 5H***11 | Filler & Breather Group; Breather And Filler Group | 1 |
Oil Filter (5h1113 N/S)
| 5H***13 | Filter Group-Engine Oil; Oil Filter Group | 1 |
Fuel Filter (1p9318 N/S)
| 1P***18 | Filter Group-Fuel | 1 |
8h4681 Primary Fuel Filter Group
| 8H***81 | Filter Group-Primary Fuel; Primary Fuel Filter Group | 1 |
Primary Fuel Filter And Lines (8s8061 N/S)
| 8S***61 | Filter Group-Primary Fuel | 1 |
Flywheel (7m1733 N/S)
| 7M***33 | Flywheel | 1 |
Flywheel (9s2428 N/S)
| 9S***28 | Flywheel Group | 1 |
Front Accessory Drive (5h1384 N/S)
| 5H***84 | Front Accessory Drive | 1 |
Fuel Filter (2m7828 N/S)
| 2M***28 | Fuel Filter | 1 |
Fuel Injection Valves And Lines (7m7423 N/S)
| 7M***23 | Fuel Injection Valves And Lines | 1 |
Fuel Pump Housing And Governor Drive
Fuel Pump Housing (3s5456 N/S)
| 3S***56 | Fuel Pump Housing Group | 1 |
8s2704 Fuel Transfer Pump Assembly
| 8S***04 | Fuel Transfer Pump | 1 |
4m9275 Fuel Transfer Pump Assembly
| 4M***75 | Fuel Transfer Pump Assembly | 1 |
Gasket Kits
| 2P***36 | Transmission | 0 |
| 3P***17 | Diesel Engine Basic | 0 |
| 3P***18 | Diesel Engine Supplementary | 0 |
3s5160 Glow Plug And Wiring Group
| 3S***60 | Glow Plug And Wiring Group; Glow Plug Group | 1 |
Governor Control
4s9281 Governor Group--Part 3 Of 3
| 4S***81 | Governor Group | 1 |
4s9281 Governor Group--Part 2 Of 3
| 4S***81 | Governor Group | 1 |
4s9281 Governor Group--Part 1 Of 3
| 4S***81 | Governor Group | 1 |
Governor Torque Spring (2s4482 N/S)
| 2S***82 | Governor Torque Spring | 1 |
Governor Torque Spring (9s4641 N/S)
| 9S***41 | Governor Torque Spring | 1 |
Crankcase Guard (4s6614 N/S)
| 4S***14 | Guard Group-Crankcase | 1 |
Fuel Lines (5s423 N/S)
| 5S***23 | Lines Group-Fuel | 1 |
Manifolds (9s2624 N/S)
| 9S***24 | Manifolds | 1 |
Manifolds (3s4120 N/S)
| 3S***20 | Manifolds | 1 |
Service Meter (9s9350 N/S)
| 9S***50 | Meter Group-Service | 1 |
Oil Filter
Oil Gauge, Fuel Gauge And Heat Indicator
Oil Gauge, Fuel Gauge And Heat Indicator (5m6580 N/S)
| 5M***80 | Oil Gauge, Fuel Gauge And Heat Indicator | 1 |
Oil Lines (5s5196 N/S)
| 5S***96 | Oil Lines | 1 |
Oil Lines
Primary Fuel Filter And Lines (1m3340 N/S)
| 1M***40 | Primary Fuel Filter And Lines | 1 |
2s308 Fuel Priming Pump Assembly
| 2S***08 | Pump As-Fuel Priming | 1 |
9m1068 Oil Pump Assembly
| 9M***68 | Pump Group-Engine Oil | 1 |
8s2706 Fuel Priming Pump Group
| 8S***06 | Pump Group-Fuel Priming | 1 |
Radiator--Rear View--Part 1 Of 2
Radiator (7m4432 N/S)--Side View--Part 2 Of 2
| 7M***32 | Radiator | 1 |
Radiator (8s6780 N/S)--Side View--Part 2 Of 2
| 8S***80 | Radiator | 1 |
Radiator (7m4432 N/S)--Rear View--Part 1 Of 2
| 7M***32 | Radiator | 1 |
Radiator--Side View--Part 2 Of 2
Radiator (8s6780 N/S)--Rear View--Part 1 Of 2
| 8S***80 | Radiator | 1 |
Radiator Guard (9s9610 N/S)
| 9S***10 | Radiator Guard | 1 |
Radiator Guard (5s3334 N/S)
| 5S***34 | Radiator Guard | 1 |
Radiator Guard (3s3364 N/S)
| 3S***64 | Radiator Guard | 1 |
3s3578 Service Meter Group
| 3S***78 | Service Meter Group | 1 |
Engine Support (5s30 N/S)
| 5S***30 | Support Group-Engine | 1 |
Torque Converter And Engine Oil Cooler (2m7823 N/S)
| 2M***23 | Torque Converter And Engine Oil Cooler | 1 |
Torque Converter And Engine Oil Cooler
Torque Converter And Engine Oil Cooler (8s3912 N/S)
| 8S***12 | Torque Converter And Engine Oil Cooler | 1 |
8s6471 Turbocharger Assembly
| 8S***71 | Turbocharger Assembly | 1 |
2s9804 Turbocharger Assembly
| 2S***04 | Turbocharger Assembly | 1 |
Water Lines (9s9734 N/S)
| 9S***34 | Water Lines | 1 |
Water Lines
Water Lines (4s5478 N/S)
| 4S***78 | Water Lines | 1 |
2m9042 Water Pump Group
| 2M***42 | Water Pump Group | 1 |
7s6297 Water Pump Group
| 7S***97 | Water Pump Group | 1 |
Pipelayer And Hydraulic Control
Winch Drum Shaft (9h284 N/S)
| 9H***84 | Shaft Group-Winch Drum | 1 |
Sheave Block And Cable Arrangement (4s6649 N/S)--Load Line
| 4S***49 | Block & Cable Ar-Sheave | 1 |
Sheave Block And Cable (4s6648 N/S)--Boom Line
| 4S***48 | Block & Cable Ar-Sheave | 1 |
7s7627 Boom Group--24 Foot
| 7S***27 | Boom Group | 1 |
4s6640 Boom Group--28 Foot--Type 2
| 4S***40 | Boom Group | 1 |
4s6640 Boom Group--28 Foot--Type 1
| 4S***40 | Boom Group | 1 |
Clutch And Drive (4s6659 N/S)--Top View--Part 2 Of 2
| 4S***59 | Clutch & Drive Group | 1 |
Clutch And Drive (4s6659 N/S)--Front View--Part 1 Of 2
| 4S***59 | Clutch & Drive Group | 1 |
7s7962 Power Take-Off Clutch Assembly
| 7S***62 | Clutch As-Power Take-Off | 1 |
Winch Clutch And Brake Control (4s6644 N/S)--Top View--Part 2 Of 2
| 4S***44 | Control Group-Clutch & Brake | 1 |
Winch Clutch And Brake Control (4s6644 N/S)--Side View--Part 1 Of 2
| 4S***44 | Control Group-Clutch & Brake | 1 |
Power Take-Off Clutch Control (4s6641 N/S)
| 4S***41 | Control Group-Power Take-Off | 1 |
Transmission Reverse Lock Control (4s6643 N/S)
| 4S***43 | Control Group-Reverse Lock | 1 |
Transmission Control (4s6642 N/S)
| 4S***42 | Control Group-Transmission | 1 |
Counterweight (4s6645 N/S)--25,050 Pounds
| 4S***45 | Counterweight Group | 1 |
6j416 Lift Cylinder Group--5" Bore X 22.97" Stroke--2 Groups Required
| 6J***16 | Cylinder Group | 1 |
Rear Power Take-Off Drive (4s6625 N/S)
| 4S***25 | Drive Group-Power Take-Off | 1 |
2k7062 Drive Shaft Assembly
| 2K***62 | Drive Shaft Group | 1 |
Frame (4s6646 N/S)--Part 2 Of 2
| 4S***46 | Frame Group | 1 |
Frame (4s6646 N/S)--Part 1 Of 2
| 4S***46 | Frame Group | 1 |
5s4007 Reverse Gear Group
| 5S***07 | Gear Group-Reverse | 1 |
2j3883 Hydraulic Oil Filter Group
| 2J***83 | Hydraulic Oil Filter Group; Hydraulic Oil-Filter Group | 1 |
6j49 Hydraulic Pump Assembly
| 6J***49 | Hydraulic Pump Assembly | 1 |
Hydraulic Lines (4s6647 N/S)--Part 2 Of 2
| 4S***47 | Lines Group-Hydraulic | 1 |
Hydraulic Lines (4s6647 N/S)--Part 1 Of 2
| 4S***47 | Lines Group-Hydraulic | 1 |
Pump Lines (4s6636 N/S)
| 4S***36 | Lines Group-Pump | 1 |
Hydraulic Control Mounting (4s6637 N/S)
| 4S***37 | Mounting Group-Hydraulic Control | 1 |
Power Take-Off--Part 2 Of 2
Power Take-Off--Part 1 Of 2
9m2888 Power Take-Off Clutch Assembly
| 9M***88 | Power Take-Off Clutch Assembly | 1 |
4s9882 Drive Shaft Assembly
| 4S***82 | Shaft Group-Drive | 1 |
Sheave Block
Tank And Valve
2k1636 Transmission Group--Part 1 Of 2
| 2K***36 | Transmission Group-Winch | 1 |
2k1636 Transmission Group--Part 2 Of 2
| 2K***36 | Transmission Group-Winch | 1 |
3j189 Control Valve Group
| 3J***89 | Valve Group-Control | 1 |
3j1050 Relief Valve Group
| 3J***50 | Valve Group-Relief | 1 |
Winch Base
Winch Brake
Winch Guard
Starting System
Alternator (9s9826 N/S)--24 Volt, 50 Ampere
Alternator (1p4407 N/S)--24 Volt, 19 Ampere
9s4070 Alternator Assembly--24 Volt, 19 Ampere
8s3583 Alternator Group--24 Volt, 50 Ampere
5s9088 Alternator Assembly--Part 1 Of 2
5s9088 Alternator Assembly--Part 2 Of 2
Battery And Wiring (1p4882 N/S)--24 Volt--As Viewed From R.H. Side Of Machine--Part 1 Of 2
Battery And Wiring (1p4882 N/S)--24 Volt--Top View--Part 2 Of 2
Battery And Wiring--12 Volt--Top View--Part 1 Of 2
Battery And Wiring--12 Volt--As Viewed From Right Hand Side Of Machine--Part 2 Of 2
Battery And Wiring (9s4552 N/S)--24 Volt--Top View--Part 1 Of 2
Battery And Wiring (9s4552 N/S)--24 Volt--As Viewed From Right Hand Side Of Machine--Part 2 Of 2
Battery And Wiring (3s2097 N/S)--12 Volt--Top View--Part 1 Of 2
Battery And Wiring (9s4552 N/S)--24 Volt--As Viewed From R.H. Side Of Machine--Part 2 Of 2
Battery And Wiring (3s2097 N/S)--12 Volt--As Viewed From Right Hand Side Of Machine--Part 2 Of 2
9s5327 Battery Box Group
Camshaft And Governor (9m9923 N/S)
| 9M***23 | Camshaft And Governor | 1 |
Camshaft And Governor (7s6287 N/S)
| 7S***87 | Camshaft And Governor Group | 1 |
7m6038 Carburetor Assembly
| 7M***38 | Carburetor Assembly | 1 |
1s411 Choke And Throttle Control Group
| 1S***11 | Choke And Throttle Control Group | 1 |
4m751 Clutch And Pinion Control Group
| 4M***51 | Clutch And Pinion Control Group | 1 |
9h4826 Clutch Group
| 9H***26 | Clutch Group | 1 |
Connecting Rod And Piston (8m2572 N/S)--2 Required
| 8M***72 | Connecting Rod And Piston | 1 |
Crankshaft (3s5532 N/S)
| 3S***32 | Crankshaft | 1 |
Crankshaft (8m2574 N/S)
| 8M***74 | Crankshaft | 1 |
Cylinder Block, Cylinder Head And Valve Mechanism (9m7751 N/S)--Part 2 Of 2
| 9M***51 | Cylinder Block, Cylinder Head And Valve Mechanism | 1 |
Cylinder Block, Cylinder Head And Valve Mechanism (7s6260 N/S)--Part 1 Of 2
| 7S***60 | Cylinder Block, Cylinder Head And Valve Mechanism | 1 |
Cylinder Block, Cylinder Head And Valve Mechanism (7s6260 N/S)--Part 2 Of 2
| 7S***60 | Cylinder Block, Cylinder Head And Valve Mechanism | 1 |
Cylinder Block, Cylinder Head And Valve Mechanism (9m7751 N/S)--Part 1 Of 2
| 9M***51 | Cylinder Block, Cylinder Head And Valve Mechanism | 1 |
7m7793 Electric Starter Group--12 Volt
7s6240 Engine Support Group
| 7S***40 | Engine Support Group | 1 |
4m5879 Fuel System Group--As Viewed From L.H. Side Of Engine
| 4M***79 | Fuel System Group; Starting Engine Fuel System | 1 |
Generator (5s5049 N/S)--12 Volt, 24 Ampere
1s150 Generator Assembly--12 Volt, 24 Ampere
1s1420 Generator Assembly--12 Volt, 24 Ampere
4m418 Generator Group--12 Volt, 24 Ampere
8s5332 Wiring Harness Assembly--24 Volt
9s9570 Wiring Harness Assembly--24 Volt
9h6203 Ignition System Group
| 9H***03 | Ignition System Group | 1 |
4m2471 Dash Lamp Assembly--12 Volt
9m1305 Dash Lamp Assembly--24 Volt
3s2987 Magneto Assembly
| 3S***87 | Magneto Assembly | 1 |
3s4777 Manifold, Carburetor And Air Cleaner Group
| 3S***77 | Manifold Carburetor And Air Cleaner Group | 1 |
9m7894 Manual Starting Crank Group
| 9M***94 | Manual Starting Crank Group | 1 |
8s3196 Electric Starter Group--24 Volt
9m1713 Oil Pump Group
| 9M***13 | Oil Pump Assembly | 1 |
3s2364 Oil Pump Group
| 3S***64 | Oil Pump Group | 1 |
8m8809 Regulator Assembly--12 Volt, 24 Ampere
3s4458 Starting Motor Assembly--24 Volt--Part 2 Of 2
3s4458 Starting Motor Assembly--24 Volt--Part 1 Of 2
1p9182 Electric Starting Motor Group--24 Volt--Part 1 Of 2
1p9182 Electric Starting Motor Group--24 Volt--Part 2 Of 2
9m7896 Engine Support Group
| 9M***96 | Support Group | 1 |
7h7290 Disconnect Switch Assembly
4m1812 Solenoid Switch Assembly
1p9181 Solenoid Switch Assembly
9m7761 Transmission And Starter Pinion Group--Part 1 Of 2
| 9M***61 | Transmission And Starter Pinion Group | 1 |
9m7761 Transmission And Starter Pinion Group--Part 2 Of 2
| 9M***61 | Transmission And Starter Pinion Group | 1 |
9m7895 Water Lines Group
| 9M***95 | Water Lines Group | 1 |
Wiring Diagram--24 Volt System
Wiring Diagram--12 Volt System
3s3949 Wiring Harness--12 Volt
3s3940 Wiring Harness--12 Volt
5s5731 Wiring Harness--12 Volt
5s6520 Wiring Harness--12 Volt
8s5882 Wiring Harness Assembly--24 Volt
Transmission And Chassis
Transmission Hydraulic Control (4m1788 N/S)
| 4M***88 | Transmission Hydraulic Control Group | 1 |
Adjustable Seat Cushions And Frame (2s8594 N/S)
| 2S***94 | Adjustable Seat Cushions And Frame | 1 |
Bevel Gear And Steering Clutch Case And Covers (4s6627 N/S)
| 4S***27 | Bevel Gear And Steering Clutch Case And Covers | 1 |
3s840 Brake Hydraulic Mechanism Group
| 3S***40 | Brake Hydraulic Mechanism Group | 1 |
Brakes--Top View - Part 2 Of 2
Brakes--Side View - Part 1 Of 2
Brakes (4m1700 N/S)--Top View - Part 2 Of 2
| 4M***00 | Brakes | 1 |
Brakes (4m1700 N/S)--Side View - Part 1 Of 2
| 4M***00 | Brakes | 1 |
Bumper (4s6356 N/S)
| 4S***56 | Bumper | 1 |
Transmission Control Linkage (4m4871 N/S)
| 4M***71 | Control Group-Transmission | 1 |
Transmission Control Linkage (4m4871 N/S)--Side View--Part 2 Of 2
| 4M***71 | Control Group-Transmission | 1 |
Transmission Control Linkage (4m4871 N/S)--Top View--Part 1 Of 2
| 4M***71 | Control Group-Transmission | 1 |
4m1742 Directional Valve Group
| 4M***42 | Directional Valve Group | 1 |
9s2789 Directional Valve Group
| 9S***89 | Directional Valve Group | 1 |
Drawbar (4s6611 N/S)
| 4S***11 | Drawbar Group | 1 |
Fenders (4s6612 N/S)--Part 2 Of 2
| 4S***12 | Fender Group | 1 |
Fenders (4s6612 N/S)--Part 1 Of 2
| 4S***12 | Fender Group | 1 |
Final Drive--Upper Half--Part 1 Of 2
Final Drive--Lower Half--Part 2 Of 2
Final Drive (4s6628 N/S)--Lower Half--Part 2 Of 2
| 4S***28 | Final Drive Group | 1 |
Final Drive (4s6628 N/S)--Upper Half--Part 1 Of 2
| 4S***28 | Final Drive Group | 1 |
Final Drive Lubrication System
Track Roller Frame (4s6630 N/S)
| 4S***30 | Frame Group-Track Roller | 1 |
Front Idler (4s6633 N/S)--Part 2 Of 2
| 4S***33 | Front Idler | 1 |
Front Idler (4s6633 N/S)--Part 1 Of 2
| 4S***33 | Front Idler | 1 |
Transfer Gear (4m5888 N/S)
| 4M***88 | Gear Group-Transfer | 1 |
Transfer Gears (4m5888 N/S)
| 4M***88 | Gear Group-Transfer | 1 |
Track Roller Guards (4s6632 N/S)--Top View
| 4S***32 | Guard Group-Track Roller | 1 |
Hood And Dash (5s1890 N/S)
| 5S***90 | Hood And Dash | 1 |
Hood And Dash
7s9622 Oil Filter Group
| 7S***22 | Oil Filter Group | 1 |
3s838 Oil Filter Group
| 3S***38 | Oil Filter Group | 1 |
8s4786 Oil Filter Group
| 8S***86 | Oil Filter Group | 1 |
5m6701 Oil Pump Group
| 5M***01 | Oil Pump Group | 1 |
Planetary Transmission--As Viewed From Right Hand Side Of Machine--Part 1 Of 2
Planetary Transmission--As Viewed From Right Hand Side Of Machine--Part 2 Of 2
Planetary Transmission (4m4893 N/S)--As Viewed From Right Hand Side Of Machine--Part 1 Of 2
| 4M***93 | Planetary Transmission Group | 1 |
Planetary Transmission (4m4893 N/S)--As Viewed From Right Hand Side Of Machine--Part 2 Of 2
| 4M***93 | Planetary Transmission Group | 1 |
Planetary Transmission (4m4893 N/S)--As Viewed From R.H. Side Of Machine--Part 2 Of 2
| 4M***93 | Planetary Transmission Group | 1 |
5s4440 Pressure Control Group
| 5S***40 | Pressure Control Group | 1 |
9s4380 Pressure Control Group
| 9S***80 | Pressure Control Group | 1 |
8s3485 Pressure Control Group
| 8S***85 | Pressure Control Group | 1 |
7s7400 Scavenge And Circulating Pump Group
| 7S***00 | Pump Group-Scavenge & Circulating | 1 |
2s7866 Relief Valve Group
| 2S***66 | Relief Valve Group | 1 |
7m1220 Relief Valve Group
| 7M***20 | Relief Valve Group | 1 |
2s7873 Scavenge And Circulating Pump Group
| 2S***73 | Scavenge And Recirculating Pump Group | 1 |
9m8669 Magnetic Screen Group
| 9M***69 | Screen Group-Magnetic; -Differential Lock | 1 |
3s1704 Seat Assembly
| 3S***04 | Seat Assembly | 1 |
5s45 Seat Assembly
| 5S***45 | Seat Group | 1 |
Adjustable Seat Cushions And Frame (9s5310 N/S)
| 9S***10 | Seat Group-Adjustable | 1 |
Steering Clutch (2m7039 N/S)
| 2M***39 | Steering Clutch | 1 |
Steering Clutch Hydraulic Control--As Viewed From R.H. Side Of Machine--Part 1 Of 2
Steering Clutch Hydraulic Control (4m4818 N/S)--Top View--Part 2 Of 2
| 4M***18 | Steering Clutch Hydraulic Control | 1 |
Steering Clutch Hydraulic Control (4m4818 N/S)--As Viewed From R.H. Side Of Machine--Part 1 Of 2
| 4M***18 | Steering Clutch Hydraulic Control | 1 |
Steering Clutch Hydraulic Control--Top View--Part 2 Of 2
Steering Clutch Hydraulic Control (4m4818 N/S)--Top View - Part 2 Of 2
| 4M***18 | Steering Clutch Hydraulic Control | 1 |
4s8931 Steering Clutch Hydraulic Valve Group
| 4S***31 | Steering Clutch Hydraulic Valve Group | 1 |
Main Frame Support (4s6618 N/S)
| 4S***18 | Support Group-Frame | 1 |
Fuel Tank (5s5801 N/S)--200 U.S. Gallon
| 5S***01 | Tank Group-Fuel | 1 |
3b3460 Tool Box Group
| 3B***60 | Tool Box Group | 1 |
9s5625 Tool Box Group
| 9S***25 | Tool Box Group | 1 |
1t611 Hydraulic Torque Converter Assembly
| 1T***11 | Torque Converter As | 1 |
Torque Divider--As Viewed From Right Hand Side Of Machine
Torque Divider (5m7960 N/S)--Side View--Part 1 Of 2
| 5M***60 | Torque Divider | 1 |
Torque Divider (5m7960 N/S)--As Viewed From Right Hand Side Of Machine
| 5M***60 | Torque Divider | 1 |
Torque Divider (5m7960 N/S)--End View--Part 2 Of 2
| 5M***60 | Torque Divider | 1 |
7m5288 Track Carrier Roller Group--4 Groups Required
| 7M***88 | Track Carrier Roller Group | 1 |
4s6634 Track Group--30" Grouser Shoe--2 Required
| 4S***34 | Track Group | 1 |
8s7029 Track Group--34" Grouser Shoe--2 Required
| 8S***29 | Track Group | 1 |
8s1739 Track Group--34" Grouser Shoe--2 Required
| 8S***39 | Track Group | 1 |
8s7030 Track Group--34" Grouser Shoe--2 Required
| 8S***30 | Track Group | 1 |
1p1544 Track Group--34" Grouser Shoe--2 Required
| 1P***44 | Track Group | 1 |
Track Roller Frame Guards
4m584 Track Roller Group--Single Flange--6 Required
| 4M***84 | Track Roller Group | 1 |
7s7672 Track Roller Group--Single Flange--6 Required
| 7S***72 | Track Roller Group | 1 |
Transmission & Steering Clutch Lubrication System (2s9332 N/S)--As Viewed From Front Of Machine--Part 3 Of 3
| 2S***32 | Transmission And Steering Clutch Lubrication System | 1 |
Transmission & Steering Clutch Lubrication System (2s9332 N/S)--As Viewed From R.H. Side Of Machine--Part 1 Of 3
| 2S***32 | Transmission And Steering Clutch Lubrication System | 1 |
Transmission & Steering Clutch Lubrication System (2s9332 N/S)--As Viewed From R.H. Side Of Machine--Part 2 Of 3
| 2S***32 | Transmission And Steering Clutch Lubrication System | 1 |
Transmission And Steering Clutch Lubrication System--As Viewed From R.H. Side Of Machine--Part 2 Of 3
Transmission And Steering Clutch Lubrication System--As Viewed From R.H. Side Of Machine--Part 1 Of 3
Transmission And Steering Clutch Lubrication System--As Viewed From Front Of Machine--Part 3 Of 3
2s7902 Transmission Arrangement
| 2S***02 | Transmission Arrangement | 1 |
Transmission Case And Covers (2s7876 N/S)--As Viewed From Right Hand Side Of Machine
| 2S***76 | Transmission Case And Covers | 1 |
Transmission Gauges (3s5219 N/S)
| 3S***19 | Transmission Gauges | 1 |
Transmission Gauges (9s4237 N/S)
| 9S***37 | Transmission Gauges | 1 |
Transmission Oil Cooler Lines (3s839 N/S)
| 3S***39 | Transmission Oil Cooler Lines | 1 |
1s8754 Universal Joint Assembly
| 1S***54 | Universal Joint Group | 1 |
8m2502 Selector Housing And Valve Group
| 8M***02 | Valve Group-Selector | 1 |
594 serial number reference
On a machine this old the PIN/serial plate is a small stamped or riveted data tag, typically mounted on the frame or clutch housing near the operator's station rather than stamped into a single fixed panel like later PIN systems. The pre-2001 Caterpillar format reads as a 3-character letter-number prefix (here 62H) followed by a sequential unit number; the prefix identifies the model/configuration line, and the number after it is the individual machine's build sequence, not a date code.
| Prefix | Identifies | Notes |
|---|---|---|
| 62H | 594 Pipelayer, power shift transmission | Documented as 62H00001-UP for the base 594 pipelayer, power shift (not 594H). Appears to be the only serial prefix used across this model's production run, roughly mid-1960s to mid-1970s; exact start/end years are not confirmed in primary Cat literature, so treat as approximate. Engine and horsepower for the 62H-prefix machine are not reliably documented apart from the later 594H: some spec listings for the base 594 show roughly 385 hp, others show 410 hp that matches the 594H's confirmed D353TA rating exactly, which points to reused 594H data rather than a genuine 62H figure. Confirm engine and horsepower against the machine's own data plate rather than a spec sheet. |
Frequently asked questions
What engine does the Caterpillar 594 pipelayer use?
It depends on the generation. The base 594 (serial prefix 62H, built roughly 1966-1975) uses a naturally aspirated Cat D353 inline-six diesel rated around 385 hp. The 594H (serial prefix 96V, roughly 1975-1986) uses a turbocharged and aftercooled D353TA rated around 410 hp (306 kW). Both are fully mechanical diesels with no electronic engine controls.
What is the operating weight of the Cat 594 pipelayer?
Operating weight runs roughly 121,500-123,600 lb (about 55,100-56,000 kg), varying by boom length and counterweight rigging. Fully rigged transport configurations with a complete counterweight set can report gross figures well above that; treat the base range as the standard machine weight and confirm exact rigging weight for a specific unit.
What replaced the Caterpillar 594H pipelayer?
No single factory model directly succeeded the 594H by name. Caterpillar ended its mechanical, clutch-and-brake sideboom line - which included the 594H - by 1986 and moved its large-pipelayer lineup to hydraulically operated, high-drive designs afterward. Check with a Cat dealer for the current-production model that fills the same lift-capacity class today.
What 594 owners discuss
What's the real difference between the Cat 594 and the 594H, and does it matter for parts and service?
Yes. The 594 (62H-prefix, built roughly 1966-1975) ran the D353 diesel, rated around 385 hp (287 kW) per period spec sheets. The 594H (96V-prefix, 1975-1986) is a later generation of the same pipelayer family, stepped up to the turbocharged D353TA rated around 410 hp (306 kW). Same engine family, different breathing and different injection/turbo calibration - don't cross-spec fuel rack settings or turbo parts between the two. Confirm which prefix you actually have before ordering engine components; listings and parts references frequently blur the two generations together.
Is the 594 "cable controlled" or hydraulic, and what does that mean for how it drives and lifts?
Both generations use a power-shift transmission with a torque divider for ground travel, not a straight mechanical drawbar. What's cable/clutch-controlled is the boom rigging: hoist and lower functions run off clutch-and-brake drums rather than hydraulic winch motors. Some machines were later converted to full hydraulic boom control (piston-type main pumps driving hydraulic winch motors) as part of major rebuilds, so a 594 in front of you may not match factory rigging. Check what's actually installed rather than assuming from the model tag.
Operators say these old clutch-and-brake pipelayers hold a suspended load better than hydraulic ones - is that true?
That's the common line among people who've run both types. A properly adjusted clutch-and-brake drum shouldn't creep when dogged off, because it's a positive mechanical lock rather than a hydraulic circuit holding back pressure. The catch is adjustment discipline: a worn or mis-adjusted clutch or brake erases that no-drift reputation fast. Test any specific machine dogged off and loaded before trusting it - have your dealer or a qualified rigger verify holding-brake and clutch adjustment before working under a suspended pipe section.
What undercarriage wear pattern should I expect on a machine that's spent its life as a sideboom?
Uneven, side-to-side wear is normal on this machine type, not automatically a red flag. Sideboom work loads one track harder than the other because the counterweight and boom sit on opposite ends of the machine and the boom side carries the lateral pull. Check rails, rollers, idlers, sprocket segments and pads on both sides separately and compare them rather than averaging. Also inspect the track frame, sway bars and stabilizer bars for scarring from contact with rock or hard right-of-way surfaces - more common on machines that worked rocky pipeline routes.
The machine pulls to one side when traveling - what usually causes that on this platform?
On this D9-derived chassis it's almost always one of a handful of things: a slipping steering clutch (uneven power side to side, a hot housing on the bad side), a brake not fully releasing (constant drag on one track), a final drive running unequal torque (hotter housing or contaminated oil on the bad side), mismatched track tension, or, on hydraulically steered variants, a pressure imbalance between the left and right circuits. Diagnose with temperature and pressure checks before swapping parts on a guess. Steering and braking are safety systems on a machine handling a suspended load - have your dealer verify clutch, brake and final drive condition before returning it to lifting work.
What electrical or sensor issues come up on these machines?
These predate electronic engine controls, so there's no ECM or sensor troubleshooting involved. The recurring complaints sit in the starting and charging system: glow plug relays that run hot and weaken over time (a real factor on prechamber-style D353 starts, which build combustion heat slowly and need a genuine warm-up before hard use), and charging systems that need clean grounds and a healthy alternator or generator on a machine that idles a lot on a pipeline right-of-way. Some owners lean on ether injection to help cold starts, but it's a get-you-going measure, not a fix for weak glow plugs or a tired battery bank - have your dealer verify the starting aid system rather than relying on ether as routine practice.
What should I check before buying a used Cat 594?
Confirm the serial prefix (62H vs 96V) actually matches the engine and specs the seller is quoting - the two generations get mixed up in listings. Walk the undercarriage on both sides and note percentage remaining on rails, rollers, idlers, sprockets and pads separately per side. Inspect the boom for cracks, bends or dents, check the paint around main pivot points for fatigue cracking, and confirm there's a current boom certification decal. Check hoist and boom wire rope for corrosion, fraying, kinks or broken strands. Look the counterweight over for unauthorized modification, since that affects rated capacity. Open the engine covers and look for chafed wires, wet spots and worn hoses. Run the boom, hoist and counterweight controls and listen for abnormal noise. Pull service records if available. Given the age of these machines and the stakes of a suspended-load lift, have a qualified pipelayer mechanic or your dealer do a full inspection before relying on it for lifting work.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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