Caterpillarexcavator
Caterpillar 320B LU
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 320B LU is the long-undercarriage variant of Cat's 320B medium hydraulic excavator, a 20-ton-class crawler machine built through the 1990s. It runs the Cat 3066T turbocharged diesel, a 6-cylinder, 6.4 L engine rated at about 95 kW (128 hp) net / 100 kW (134 hp) gross. Operating weight on the LU chassis runs about 20,620 kg (45,459 lb), roughly 1,200 kg (1,850 lb) heavier than the standard-gauge 320B at about 19,400 kg (42,770 lb), the extra mass coming from the wider, longer track frame. The 320B line followed Cat's original 320/320 L launch excavator and preceded the electronically controlled 320C. Cat offered the platform across a spread of undercarriage widths and lengths: standard 320B and 320B L, wide-gauge LL, narrow N, and LU long-undercarriage, plus a lower-output 320B S variant on the smaller 3116T engine and a 320B U configuration, letting buyers match ground pressure and stability to the job rather than to the digging package alone.
Inside the 320B family, undercarriage length and gauge were the main variable. The LU's stretched frame trades a slightly larger footprint and turning radius for better lift capacity and stability on wide trenching, pipe-laying, and lift-heavy work where the standard or narrow chassis would need more counterweight or outrigger support. The 320B kept Cat's mechanically controlled, pilot-hydraulic system, simpler to diagnose and repair in the field than the sensor-driven electronics Cat introduced on the following 320C. That mechanical simplicity, combined with the huge number of hours the 3066T logged across 320, 320B, and early 320C applications worldwide, keeps the 320B LU relevant today: it is a low-cost, parts-common entry point into 20-ton-class digging for buyers who want proven mechanical reliability, and its running gear, engine, and hydraulic components remain widely stocked in the used and aftermarket parts channels serving the broader 320-family fleet still in service.
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 320B LU specifications
Engine
| Model | Cat 3066T, turbocharged inline-6 diesel |
| Cylinders | 6 |
| Gross power | 134 hp (99.9 kW) |
| Net power | 128 hp (95.4 kW) at 1800 rpm |
| Displacement | 6.4 L (389 cu in) |
Weights
| Operating weight, long-undercarriage (LU) configuration | 20,620 kg (45,459 lb) |
| Operating weight, standard-gauge 320B (for comparison) | 19,400 kg (42,770 lb) |
| Ground pressure | Not documented in available factory spec sheets for this configuration — verify with your dealer. |
Dimensions
| Transport length | 9.00-9.51 m (29.5-31.2 ft), varies by boom/stick configuration |
| Transport width, over tracks | 3.18-3.20 m (10.4-10.5 ft) |
| Height, top of cab | 2.96 m (9.7 ft) |
| Shipping height | 2.93-3.43 m (9.6-11.3 ft), varies by boom configuration |
| Tail swing radius | 2.77 m (9.1 ft) |
| Track shoe width, standard | 800 mm (31.5 in) |
| Ground clearance | 0.48-0.49 m (1.56-1.61 ft) |
| Track length on ground | 3.65 m (12.0 ft) |
| Track gauge | 2.38-2.41 m (7.8-7.9 ft) |
Performance
| Max digging depth | 5.64-7.58 m (18.5-24.9 ft), varies by boom/stick configuration |
| Max reach at ground level | 8.78-10.69 m (28.8-35.1 ft), varies by boom/stick configuration |
| Max cutting height | 8.78-9.75 m (28.8-32.0 ft), varies by boom/stick configuration |
| Max dump/loading height | approx. 6.95 m (22.8 ft), configuration-dependent |
| Swing speed | 10.7 rpm |
| Travel speed | 5.5 km/h (3.4 mph) |
| Drawbar pull | 177 kN (39,800 lbf) |
| Bucket capacity | reference 0.92 m3 (1.2 yd3); range 0.38-1.53 m3 (0.5-2.0 yd3) depending on bucket selection |
| Gradeability | Not documented in available factory spec sheets for this configuration — verify with your dealer. |
Forces
| Bucket digging force | Not documented in available factory spec sheets for this era/configuration — verify with your dealer. |
| Stick/arm digging force | Not documented in available factory spec sheets for this era/configuration — verify with your dealer. |
Service capacities (summary)
| Fuel tank | 340 L (89.9-90.0 gal US) |
| Hydraulic system | 220 L (58.0-58.2 gal US) |
| Engine oil | 19.3-20.8 L (5.1-5.5 gal US) |
| Cooling system | 25.0-25.4 L (6.6-6.7 gal US) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
320B LU fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 19.3 L (5.1 US gal) | Cat DEO 15W-40 for ambient -9.5 to 50°C; Cat DEO 10W-30 for ambient -18 to 40°C. Oil must meet Cat's diesel engine oil performance spec for the turbocharged 6-cylinder diesel used on this platform. |
| Cooling system | 25.0 L (6.6 US gal) | Cat DEAC (Diesel Engine Antifreeze/Coolant), mixed 50/50 with water; freeze protection to -37°C. Cat ELC extended-life coolant is the later factory-approved upgrade path; do not mix ELC and DEAC in the same system. |
| Fuel tank | 340.7 L (90 US gal) | Diesel fuel meeting Cat's fuel specification; use a winter-blend or anti-gel conditioner below 0°C ambient. |
| Hydraulic system (total, including tank) | 219.6 L (58 US gal) | Cat HYDO Advanced 10 for ambient -20 to 40°C (standard choice); Cat HYDO Advanced 30 for sustained ambient above 40°C. |
| Hydraulic tank (refill only) | Not published as a separate line item in this platform's service refill table; folded into the 219.6 L (58 US gal) system total above. | Same fluid as hydraulic system: Cat HYDO Advanced 10 or 30 selected by ambient climate. |
| Final drive (each) | 9.8 L (2.6 US gal) per side | Cat TDTO: SAE 30 for -20 to 10°C, SAE 40 for -10 to 30°C, SAE 50 for 0 to 50°C. Cat TDTO-TMS multigrade covers -20 to 40°C in a single fill. |
| Swing drive | 6.1 L (1.6 US gal) | Cat TDTO, same climate-based grade selection as the final drives (SAE 30/40/50, or TDTO-TMS multigrade). |
| Grease (spec only) | Applied at grease fittings per the lubrication schedule; not a refill volume. | Cat Multipurpose Grease (NLGI 2, lithium-complex EP) for normal climates. Cat Arctic Platinum or an equivalent NLGI 1/0 EP grease for sustained sub-freezing cold. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 320B LU maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 50 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 4,000 h |
|
| Every 6,000 h |
|
Servicing the 320B LU beyond the schedule
Predictive Maintenance & Fluid Analysis
Run S.O.S sampling on the 3066T's engine oil, hydraulic tank, swing drive, and both final drives at every scheduled change. Watch iron and chromium trends in the final-drive samples; rising counts flag face-seal wear before gear oil starts weeping at the sprocket. Track hydraulic sample particle counts closely; this era's pilot-hydraulic system has no self-diagnostics, so oil analysis is the earliest warning of pump or cylinder seal wear. Log turbocharger boost and exhaust temperature trends to catch shaft bearing wear before it strands the machine.
Corrective & Common Repairs
Expect final-drive face-seal leaks first on a 320B LU worked in abrasive dirt or demolition rubble; the long undercarriage packs debris into the sprocket area faster than the standard-gauge chassis. Swing bearing bolt torque and gear backlash need regular checks; a loose bearing shows up as knocking during slew before it damages the swing gear. The pilot-hydraulic control valves are mechanically simple to troubleshoot with test gauges, no electronic scan tool needed, which keeps diagnostic time and repair cost down compared to the 320C that followed.
Overhaul & Rebuild Points
Undercarriage wear is the main rebuild driver on an LU-configured 320B: the extended track frame carries more chain, rollers, and idlers than the standard chassis, so measure link and bushing wear against the OMM's gauge limits rather than by hours alone. Main hydraulic pump and swing motor internal leakage should be flow-tested around major service intervals; both are rebuildable rather than throwaway on this generation. Turbocharger and injector reconditioning on the 3066T is routine mid-life work, well supported by the rebuilt-component aftermarket serving this engine family.
Seasonal & Environment Servicing
Cold-climate 320B LU operation needs a block heater and winter-viscosity engine and hydraulic oil; the mechanically governed 3066T has no cold-start electronics to compensate for thickened fluid. Verify coolant freeze protection and corrosion inhibitor level before winter layup. In hot, dusty, or abrasive-ground work, clean the radiator and hydraulic-oil cooler cores daily and wash packed material out of the long undercarriage each shift to protect the final-drive face seals, the component most exposed by the LU's extra track-frame length.
320B LU fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| 2302 | Governor actuator feedback signal erratic or outside expected range. | Worn or intermittent feedback potentiometer in the governor actuator, corroded connector pins, or a chafed harness between the actuator and the monitor/controller. | Check the governor actuator connector for corrosion and secure pins, inspect harness routing near the actuator for chafing, then run the monitor panel governor calibration/sweep test before replacing the actuator. |
| 2201 | Governor actuator feedback sensor circuit reading abnormal voltage - open circuit or shorted to battery voltage. | Broken wire, disconnected connector, or a short to a hot circuit in the governor actuator feedback wiring. | Key off, disconnect the governor actuator connector, and check circuit continuity and voltage against spec before reconnecting; repair or replace damaged wiring. |
| 2202 | Governor actuator feedback sensor circuit shorted to chassis ground. | Chafed harness insulation contacting the frame, or moisture intrusion at the actuator connector. | Inspect the feedback circuit wiring for grounded insulation damage and check the connector for water intrusion; repair the short and reseal the connector. |
| 3201 | Governor/monitor calibration data error or out-of-range calibration value. | Governor actuator or throttle control was serviced without completing the calibration procedure, or calibration was interrupted. | Enter the monitor panel service mode and run the governor actuator calibration procedure from start to finish without interruption. |
| 1302 | Engine oil pressure below the acceptable threshold for current engine speed. | Low oil level, worn oil pump, plugged oil filter, or a faulty oil pressure sending unit. | Shut down and check engine oil level and condition first; if level is correct, verify actual pressure with a mechanical gauge before condemning the sender. |
| 1303 | Engine coolant temperature above the normal operating threshold. | Low coolant level, plugged radiator core, slipping or damaged fan drive, or a stuck thermostat. | Check coolant level when cool and inspect the radiator core and fan drive for debris or slippage before checking the coolant temperature sender. |
| 1304 | Hydraulic oil temperature above the normal operating threshold. | Low hydraulic oil level, clogged oil cooler core, cooling fan malfunction, or sustained high-load operation in hot ambient conditions. | Check hydraulic oil level and inspect the oil cooler core for debris; confirm the cooling fan is turning at expected speed before further diagnosis. |
| A203 | Communication fault between the machine monitor panel and the engine/governor controller. | Damaged or corroded data link wiring between the monitor and controller, or a weak connection at a controller ground/power pin. | Check the data link harness and connectors between the monitor panel and controller for damage or corrosion, and verify controller power/ground before replacing either module. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
320B LU attachments & work tools
Buckets
General-purpose and heavy-duty buckets for this 20-21 t class run roughly 0.64-1.36 m³ (0.84-1.78 yd³), with widths from about 750 mm to 1370 mm (30-54 in) depending on duty. Severe-duty/rock buckets sit at the narrow, high-capacity-per-tooth end of that range for tougher digging conditions. Buckets use 80 mm pins on the standard B-linkage stick/bucket geometry, mounted either pin-on or through a pin-grabber quick coupler.
Hydraulic hammers
This size class takes a medium-duty breaker in roughly the 1,500-2,500 kg operating-weight bracket, matching the common carrier-to-hammer weight ratio used for a 20 t excavator. Typical circuit needs run about 110-180 bar working pressure and 120-170 L/min flow, varies by hammer brand/model, so match the tool's spec plate to the machine's auxiliary relief and flow before hookup.
Quick couplers
Standard fitment is a hydraulic pin-grabber (B-linkage style) coupler sized for 80 mm bucket pins, matching the same pin spacing used across this size class of Cat excavators. Mechanical wedge-style couplers built to the same 80 mm pin centers are also used where a hydraulic coupler circuit isn't fitted.
Thumbs/grapples
Hydraulic thumbs (progressive-link, typically two-tooth) mount to the stick on the same 80 mm main pin and run off a single cylinder, sized to pair with buckets around 900 mm (36 in) and up. Grapples, fixed or rotating, attach through the same coupler/pin interface for sorting, demolition, and material-handling work.
Rippers
Single-shank rippers pin to the stick through the same 80 mm B-linkage bracket used for buckets, for breaking up asphalt, hardpan, or frozen ground ahead of digging or trenching.
Hydraulic kit notes
The base machine circuit supports standard boom/stick/bucket functions; running a hammer, thumb, or grapple needs a dedicated auxiliary attachment line with its own flow and pressure relief, and not all units came factory-fitted with one. Confirm whether the specific machine carries the aux circuit and its relief setting before ordering a tool, since hydraulic kit provisioning varies by configuration/series across this family.
All 320B LU assemblies by section
Every catalogued assembly group for the Caterpillar 320B LU. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
1601965 Air Cleaner Gp
| 16***65 | Air Cleaner Group | 1 |
5i7589 Cartridge As-Turbocharger
| 5I***89 | Cartridge As-Turbocharger | 1 |
1601869 Lines Gp-Air
| 16***69 | Lines Group-Air | 1 |
5i7766 Lines Gp-Air
| 5I***66 | Lines Group-Air; (Air) | 1 |
1189828 Lines Gp-Drain
| 11***28 | Lines Group-Muffler Drain | 1 |
5i7765 Manifold Gp-Exhaust
| 5I***65 | Manifold Group-Exhaust; (Exhaust) | 1 |
5i7764 Manifold Gp-Inlet
| 5I***64 | Manifold Group-Inlet; (Inlet) | 1 |
1601865 Mounting Gp-Air Cleaner
| 16***65 | Mounting Group-Air Cleaner | 1 |
5i8033 Muffler Gp
| 5I***33 | Muffler Group | 1 |
5i8018 Turbocharger Gp
| 5I***18 | Turbocharger Group | 1 |
Basic Engine
5i7755 Camshaft Gp
| 5I***55 | Camshaft Group | 1 |
5i7753 Cover Gp-Valve Mechanism
| 5I***53 | Cover Group-Valve Mechanism; (Valve Mechanism) | 1 |
5i7972 Crankshaft Gp
| 5I***72 | Crankshaft Group | 1 |
1252955 Crankshaft Gp
| 12***55 | Crankshaft Group | 1 |
1352339 Cylinder Block Gp
| 13***39 | Cylinder Block Group | 1 |
1352340 Cylinder Block Gp
| 13***40 | Cylinder Block Group | 1 |
5i7751 Cylinder Head Gp
| 5I***51 | Cylinder Head Group | 1 |
5i8027 Flywheel Gp
| 5I***27 | Flywheel Group | 1 |
5i8032 Gear Gp-Front
| 5I***32 | Gear Group-Front; (Front) | 1 |
1252953 Housing Gp-Flywheel
| 12***53 | Housing Group-Flywheel | 1 |
5i7971 Housing Gp-Front
| 5I***71 | Housing Group-Front; (Front) | 1 |
5i7757 Housing Gp-Front
| 5I***57 | Housing Group-Front; (Front) | 1 |
1601870 Mounting Gp-Engine
| 16***70 | Mounting Group-Engine | 1 |
1519776 Pan Gp-Oil
| 15***76 | Pan Group-Oil; (Oil) | 1 |
5i7760 Piston & Rod Gp
| 5I***60 | Piston & Rod Group | 1 |
5i7752 Valve Mechanism Gp
| 5I***52 | Valve Mechanism Group | 1 |
Cooling System
1252956 Cooler Gp-Engine Oil
| 12***56 | Cooler Group-Engine Oil; (Engine Oil) | 1 |
1765035 Cooling Ar
| 13***32 | Guard Group-Fan; (Fan) | 1 |
| 17***35 | Cooling Ar | 1 |
| 17***73 | Engine Ar | 1 |
5i7774 Fan Gp-Suction
| 5I***74 | Fan Group-Suction; (Suction) | 1 |
1398732 Guard Gp-Fan
| 13***32 | Guard Group-Fan; (Fan) | 1 |
1252959 Lines Gp-Water
| 12***59 | Lines Group-Water; (Water) | 1 |
5i7973 Pump Gp-Water
| 5I***73 | Pump Group-Water; (Water) | 1 |
1253016 Pump Gp-Water
| 12***16 | Pump Group-Water; (Water) | 1 |
1843893 Radiator & Hyd Oil Cooler Gp
| 18***93 | Radiator & Hydraulic Oil Cooler Group | 1 |
1601868 Radiator & Hyd Oil Cooler Gp
| 16***68 | Radiator & Hydraulic Oil Cooler Group | 1 |
1601867 Radiator & Hyd Oil Cooler Gp
| 16***67 | Radiator & Hydraulic Oil Cooler Group | 1 |
Electrical And Starting System
1706872 Alarm Gp-Travel
| 17***72 | Alarm Group-Travel | 1 |
5i8085 Alternator Gp-Charging
| 5I***85 | Alternator Group | 1 |
1252994 Alternator Gp-Charging
| 12***94 | Alternator Group-Charging; (Charging) | 1 |
1709454 Battery & Wiring Gp-Part 2 Of 3
| 17***54 | Battery & Wiring Group | 1 |
1709454 Battery & Wiring Gp-Part 1 Of 3
| 17***54 | Battery & Wiring Group | 1 |
1709454 Battery & Wiring Gp-Part 3 Of 3
| 17***54 | Battery & Wiring Group | 1 |
1636646 Battery & Wiring Gp-Cold Weath
| 16***46 | Battery & Wiring Group; -Cold Weather | 1 |
1613077 Cable As
| 16***77 | Cable As | 1 |
1613076 Cable As
| 16***76 | Cable As | 1 |
1160080 Cable As
| 11***80 | Cable As; (Jumper) | 1 |
1573219 Control & Mtg Gp-Electronic
| 15***19 | Control & Mtg Group-Electronic | 1 |
1507021 Converter Gp-Electrical
| 15***21 | Converter Group-Electrical | 1 |
1706861 Harness As-Part 3 Of 3
| 17***61 | Harness As | 1 |
1507024 Harness As
| 15***24 | Harness As | 1 |
1673595 Harness As
| 16***95 | Harness As | 1 |
1673494 Harness As
| 16***94 | Harness As | 1 |
1706861 Harness As-Part 2 Of 3
| 17***61 | Harness As | 1 |
1160260 Harness As
| 11***60 | Harness As | 1 |
1160243 Harness As
| 11***43 | Harness As; (Cab) | 1 |
1613089 Harness As
| 16***89 | Harness As | 1 |
1160258 Harness As
| 11***58 | Harness As | 1 |
| 11***59 | Harness As | 1 |
| 11***60 | Harness As | 1 |
1613088 Harness As
| 16***88 | Harness As | 1 |
1507022 Harness As
| 15***22 | Harness As | 1 |
| 15***23 | Harness As | 1 |
| 15***24 | Harness As | 1 |
1160259 Harness As
| 11***59 | Harness As | 1 |
1706861 Harness As-Part 1 Of 3
| 17***61 | Harness As | 1 |
1830996 Harness As-Part 3 Of 3
| 18***96 | Harness As | 1 |
1507023 Harness As
| 15***23 | Harness As | 1 |
1830996 Harness As-Part 1 Of 3
| 18***96 | Harness As | 1 |
1830996 Harness As-Part 2 Of 3
| 18***96 | Harness As | 1 |
1507001 Harness As-Console-Part 2 Of 2
| 15***01 | Harness As-Console; (Console) | 1 |
1507000 Harness As-Console-Part 2 Of 2
| 15***00 | Harness As-Console; (Console) | 1 |
1532491 Harness As-Console
| 15***91 | Harness As-Console | 1 |
1507000 Harness As-Console-Part 1 Of 2
| 15***00 | Harness As-Console; (Console) | 1 |
1507001 Harness As-Console-Part 1 Of 2
| 15***01 | Harness As-Console; (Console) | 1 |
1506999 Harness As-Console
| 15***99 | Harness As-Console | 1 |
| 15***00 | Harness As-Console; (Console) | 1 |
| 15***01 | Harness As-Console; (Console) | 1 |
1532555 Harness As-Wiring
| 15***55 | Harness As-Wiring | 1 |
| 15***56 | Harness As-Wiring; (Wiring) | 1 |
| 15***57 | Harness As-Wiring; (Wiring) | 1 |
1532557 Harness As-Wiring
| 15***57 | Harness As-Wiring; (Wiring) | 1 |
1506990 Harness As-Wiring
| 15***90 | Harness As-Wiring; (Wiring) | 1 |
1532556 Harness As-Wiring
| 15***56 | Harness As-Wiring; (Wiring) | 1 |
1506991 Harness As-Wiring
| 15***91 | Harness As-Wiring; (Wiring) | 1 |
1506989 Harness As-Wiring
| 15***89 | Harness As-Wiring | 1 |
| 15***90 | Harness As-Wiring; (Wiring) | 1 |
| 15***91 | Harness As-Wiring; (Wiring) | 1 |
1114813 Lamp Gp-Flood
| 11***13 | Lamp Group-Flood; -Cab | 1 |
1532523 Lamp Gp-Flood
| 15***23 | Lamp Group-Flood; -Horizontal Rh | 1 |
1532521 Lamp Gp-Flood
| 15***21 | Lamp Group-Flood; -Chassis, Boom-Boom, Rear | 1 |
1160214 Lighting Gp-Boom
| 11***14 | Lighting Group-Boom; -Long Boom, Rh | 1 |
1385160 Lighting Gp-Boom
| 13***60 | Lighting Group-Boom; (Boom) | 1 |
1114694 Lighting Gp-Cab
| 11***94 | Lighting Group-Cab | 1 |
7y8189 Lighting Gp-Cab
| 7Y***89 | Lighting Group-Cab | 1 |
4i5409 Lighting Gp-Chassis
| 4I***09 | Lighting Group-Chassis; -Front, Rh | 1 |
1252962 Mounting Gp-Alternator
| 12***62 | Mounting Group-Alternator; (Alternator) | 1 |
1352344 Mounting Gp-Alternator
| 13***44 | Mounting Group-Alternator; (Alternator) | 1 |
1252963 Mounting Gp-Starting Motor
| 12***63 | Mounting Group-Starting Motor | 1 |
1160151 Panel Gp-Circuit Breaker-Part 2 Of 2
| 11***51 | Panel Group-Circuit Breaker | 1 |
1160151 Panel Gp-Circuit Breaker-Part 1 Of 2
| 11***51 | Panel Group-Circuit Breaker | 1 |
1507030 Speaker Gp-Radio
| 15***30 | Speaker Group-Radio | 1 |
1252988 Starting Motor Gp-Electric
| 12***88 | Starting Motor Group-Electric | 1 |
1114799 Switch As
| 11***99 | Switch As; (Hydraulic Lockout, Neutral Start) | 1 |
7n0718 Switch As-Disconnect
| 7N***18 | Switch As-Disconnect; -Battery-Ground Level | 1 |
1752313 Switch As-Magnetic
| 17***13 | Switch As-Magnetic; (Magnetic) | 1 |
1752314 Switch As-Magnetic
| 17***14 | Switch As-Magnetic; (Magnetic) | 1 |
1107884 Switch As-Toggle
| 11***84 | Switch As-Toggle; (Momentary)(Manual Engine Speed Control) | 1 |
1140421 Switch As-Toggle
| 11***21 | Switch As-Toggle; (Counterweight Removal) | 1 |
1251302 Switch As-Magnetic
| 12***02 | Switch Group-Magnetic; -Starting Motor, Start Relay | 1 |
| 17***13 | Switch As-Magnetic; (Magnetic) | 1 |
| 17***14 | Switch As-Magnetic; (Magnetic) | 1 |
1060107 Switch As-Rotary
| 10***07 | Switch Group-Rotary; -Autodig Material Select-Throttle Position | 1 |
9g7641 Switch Gp-Start
| 9G***41 | Switch Group-Start; -Engine, Key-Vims Service | 1 |
1114870 Timer As
| 11***70 | Timer As; (On Delay) | 1 |
1160159 Wiring Gp
| 11***59 | Wiring Group-Cab | 1 |
1060054 Wiring Gp-Cab
| 10***54 | Wiring Group-Cab | 1 |
1060058 Wiring Gp-Console
| 10***58 | Wiring Group-Console; -Rh | 1 |
1060057 Wiring Gp-Console
| 10***57 | Wiring Group-Console; (Console) | 1 |
1060056 Wiring Gp-Console
| 10***56 | Wiring Group-Console | 1 |
| 10***57 | Wiring Group-Console; (Console) | 1 |
| 10***58 | Wiring Group-Console; -Rh | 1 |
1507025 Wiring Gp-Radio
| 15***25 | Wiring Group-Radio | 1 |
Engine Arrangement
1765073 Engine Ar-Part 1 Of 2
| 12***53 | Housing Group-Flywheel | 1 |
| 12***57 | Filter Group-Engine Oil; (Engine Oil) | 1 |
| 13***40 | Cylinder Block Group | 1 |
1765032 Engine Ar-Part 1 Of 2
| 12***53 | Housing Group-Flywheel | 1 |
| 12***55 | Crankshaft Group | 1 |
| 12***57 | Filter Group-Engine Oil; (Engine Oil) | 1 |
1765032 Engine Ar-Part 2 Of 2
| 12***56 | Cooler Group-Engine Oil; (Engine Oil) | 1 |
| 12***59 | Lines Group-Water; (Water) | 1 |
| 12***60 | Lines Group-Fuel; (Fuel) | 1 |
1765073 Engine Ar-Part 2 Of 2
| 12***56 | Cooler Group-Engine Oil; (Engine Oil) | 1 |
| 12***59 | Lines Group-Water; (Water) | 1 |
| 12***60 | Lines Group-Fuel; (Fuel) | 1 |
Frame And Body
1519807 Box & Mtg Gp-Storage
| 15***07 | Box & Mtg Group-Storage | 1 |
1519808 Box Gp-Storage
| 15***08 | Box Group-Storage | 1 |
1519800 Counterweight Gp
| 15***00 | Counterweight Group | 1 |
1519801 Counterweight Gp
| 15***01 | Counterweight Group | 1 |
1843868 Door Gp
| 18***68 | Door Group | 1 |
1617706 Door Gp-Hood
| 16***06 | Door Group-Hood | 1 |
1617699 Door Gp-Hood
| 16***99 | Door Group-Hood | 1 |
1519804 Fender & Cover Gp
| 15***04 | Fender & Cover Group | 1 |
1175476 Frame As-Undercarriage
| 11***76 | Frame As-Undercarriage | 1 |
1175483 Frame As-Undercarriage
| 11***83 | Frame As-Undercarriage | 1 |
1519752 Frame Gp-Upper
| 15***52 | Frame Group-Upper | 1 |
1141340 Gear & Bearing Gp-Part 1 Of 2
| 11***40 | Gear & Bearing Group-Swing | 1 |
1141341 Gear & Bearing Gp-Part 1 Of 2
| 11***41 | Gear & Bearing Group-Swing | 1 |
1141340 Gear & Bearing Gp-Part 2 Of 2
| 11***40 | Gear & Bearing Group-Swing | 1 |
1141341 Gear & Bearing Gp-Part 2 Of 2
| 11***41 | Gear & Bearing Group-Swing | 1 |
1843887 Guard Ar-Bottom
| 12***26 | Guard Group-Travel Motor | 1 |
| 13***50 | Guard Group-Swivel; (Swivel) | 1 |
| 16***79 | Guard Group-Bottom; (Bottom) | 1 |
1624379 Guard Gp-Bottom
| 16***79 | Guard Group-Bottom; (Bottom) | 1 |
1519802 Guard Gp-Bottom
| 15***02 | Guard Group-Bottom | 1 |
1348850 Guard Gp-Swivel
| 13***50 | Guard Group-Swivel; (Swivel) | 1 |
0875908 Guard Gp-Track Guide
| 08***08 | Guard Group-Track Guide; -Center | 1 |
1175490 Guard Gp-Travel Motor
| 11***90 | Guard Group-Travel Motor | 1 |
1271426 Guard Gp-Travel Motor
| 12***26 | Guard Group-Travel Motor | 1 |
1713279 Handhold Gp
| 17***79 | Handhold Group | 1 |
1519805 Handhold Gp
| 15***05 | Handhold Group | 1 |
1620849 Handle Gp-Storage Door
| 16***49 | Handle Group-Storage Door | 1 |
1519803 Hood & Guard Gp-Part 3 Of 3
| 15***03 | Hood & Guard Group | 1 |
1519803 Hood & Guard Gp-Part 2 Of 3
| 15***03 | Hood & Guard Group | 1 |
1519803 Hood & Guard Gp-Part 1 Of 3
| 15***03 | Hood & Guard Group | 1 |
1663174 Hood Gp-Engine
| 16***74 | Hood Group-Engine | 1 |
1765082 Hood Gp-Perforated
| 17***82 | Hood Group-Perforated; (Perforated) | 1 |
1132907 Idler Gp-Front
| 11***07 | Idler Group-Front; (Front) (C) | 1 |
1156421 Idler Gp-Front
| 11***21 | Idler Group-Front; -Lh | 1 |
1156419 Idler Gp-Front
| 11***19 | Idler Group-Front | 1 |
1156420 Idler Gp-Front
| 11***20 | Idler Group-Front; -Rh | 1 |
9w9353 Link As-Track
| 9W***53 | Link As-Track; -Sealed, Lubricated | 1 |
1941608 Link As-Track
| 19***08 | Link As-Track; (Track) | 1 |
9w9354 Link As-Track
| 9W***54 | Link As-Track; (Track) | 1 |
1941609 Link As-Track
| 19***09 | Link As-Track; (Track) | 1 |
7y1607 Roller Ar-Track & Carrier
| 7Y***07 | Roller Ar-Track & Carrier | 1 |
7y1608 Roller Ar-Track & Carrier
| 7Y***08 | Roller Ar-Track & Carrier | 1 |
8e5600 Roller Gp-Track Carrier
| 8E***00 | Roller Group-Track Carrier; (Track Carrier) | 1 |
1634143 Roller Gp-Track-Single Flange
| 16***43 | Roller Group-Track-Single Flange; (Track) (Single Flange) | 1 |
1156422 Track Adjuster & Recoil Gp
| 11***22 | Track Adjuster & Recoil Group; -Rh | 1 |
1156425 Track Adjuster & Recoil Gp
| 11***25 | Track Adjuster & Recoil Group | 1 |
1156424 Track Adjuster & Recoil Gp
| 11***24 | Track Adjuster & Recoil Group | 1 |
1156423 Track Adjuster & Recoil Gp
| 11***23 | Track Adjuster & Recoil Group; -Lh | 1 |
9w9361 Track Gp
| 9W***61 | Nut - Track (M20x1.5-6g Thd) | 180 |
| 9W***19 | Bolt - Track (M20x1.5x55mm) | 180 |
| 9W***51 | Shoe-Track; (800mm Wide) | 45 |
1941921 Track Gp
| 19***09 | Link As-Track; (Track) | 1 |
| 19***21 | Track Group; -2-Required | 1 |
| 9W***61 | Nut - Track (M20x1.5-6g Thd) | 180 |
9w9357 Track Gp
| 9W***61 | Nut - Track (M20x1.5-6g Thd) | 196 |
| 9W***19 | Bolt - Track (M20x1.5x55mm) | 196 |
| 9W***51 | Shoe-Track; (800mm Wide) | 49 |
1941912 Track Gp
| 19***08 | Link As-Track; (Track) | 1 |
| 19***12 | Track Group; -2-Required | 1 |
| 9W***61 | Nut - Track (M20x1.5-6g Thd) | 196 |
9w9360 Track Gp
| 12***62 | Shoe; (Track) | 45 |
| 9W***61 | Nut - Track (M20x1.5-6g Thd) | 180 |
| 9W***19 | Bolt - Track (M20x1.5x55mm) | 180 |
9w9356 Track Gp
1177120 Track Gp
| 11***20 | Track Group | 1 |
| 6I***54 | Shoe-Track | 45 |
| 9W***61 | Nut - Track (M20x1.5-6g Thd) | 180 |
1941920 Track Gp
| 12***62 | Shoe; (Track) | 45 |
| 19***09 | Link As-Track; (Track) | 1 |
| 19***20 | Track Group; -2-Required | 1 |
1941917 Track Gp
| 19***09 | Link As-Track; (Track) | 1 |
| 19***17 | Track Group; -2-Required | 1 |
| 9W***61 | Nut - Track (M20x1.5-6g Thd) | 180 |
1941910 Track Gp
| 12***62 | Shoe; (Track) | 49 |
| 19***08 | Link As-Track; (Track) | 1 |
| 19***10 | Track Group; -2-Required | 1 |
Fuel System
1573130 Control Gp-Governor
| 15***30 | Control Group-Governor | 1 |
5i7954 Filter Gp-Fuel
| 5I***54 | Filter Group-Fuel | 1 |
1765030 Lines Gp-Fuel
| 17***30 | Lines Group-Fuel | 1 |
1252960 Lines Gp-Fuel
| 12***60 | Lines Group-Fuel; (Fuel) | 1 |
5i7706 Nozzle Gp-Unit Injector
| 5I***06 | Nozzle Group-Unit Injector | 1 |
1540648 Pump Gp-Fuel Injection-Part 4 Of 6
| 15***48 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1540648 Pump Gp-Fuel Injection-Part 3 Of 6
| 15***48 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1843961 Pump Gp-Fuel Injection-Part 7 Of 7
| 18***61 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1843961 Pump Gp-Fuel Injection-Part 4 Of 7
| 18***61 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1843961 Pump Gp-Fuel Injection-Part 1 Of 7
| 18***61 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1540648 Pump Gp-Fuel Injection-Part 5 Of 6
| 15***48 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1540648 Pump Gp-Fuel Injection-Part 2 Of 6
| 15***48 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1540648 Pump Gp-Fuel Injection-Part 1 Of 6
| 15***48 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1540648 Pump Gp-Fuel Injection-Part 6 Of 6
| 15***48 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1843961 Pump Gp-Fuel Injection-Part 6 Of 7
| 18***61 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1843961 Pump Gp-Fuel Injection-Part 3 Of 7
| 18***61 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1843961 Pump Gp-Fuel Injection-Part 5 Of 7
| 18***61 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1843961 Pump Gp-Fuel Injection-Part 2 Of 7
| 18***61 | Pump Group-Fuel Injection; (Fuel Injection) | 1 |
1458862 Separator Gp-Water
| 14***62 | Separator Group-Water | 1 |
1519788 Tank & Mtg Gp-Fuel
| 15***88 | Tank & Mtg Group-Fuel | 1 |
1519789 Tank Gp-Fuel
| 15***89 | Tank Group-Fuel | 1 |
Hydraulic System
5i8416 Accumulator Gp
| 5I***16 | Accumulator Group-Hydraulic; -Charged-Pilot Oil | 1 |
0874454 Accumulator Gp
| 08***54 | Accumulator Group-Hydraulic; -Charged-Pilot Oil | 1 |
0874456 Accumulator Gp
| 08***56 | Accumulator Group-Hydraulic; -Charged-Pilot Oil | 1 |
| 4I***36 | Accumulator Group-Hydraulic; -Charged-Pilot Oil | 1 |
| 5I***16 | Accumulator Group-Hydraulic; -Charged-Pilot Oil | 1 |
4i1536 Accumulator Gp
| 4I***36 | Accumulator Group-Hydraulic; -Charged-Pilot Oil | 1 |
1843883 Control Ar-Auxiliary
| 11***28 | Control Group-Hydraulic Pedal; -Auxiliary | 1 |
| 15***49 | Lines Group-Front; (Front) | 1 |
| 15***50 | Lines Group-Pilot; (Pilot) | 1 |
1540569 Control Gp-Pilot Operated Hyd
| 15***69 | Control Group-Handle | 1 |
1337899 Control Gp-Pilot Operated Hyd
| 13***99 | Control Group-Handle; -Lh Joystick | 1 |
1337900 Control Gp-Pilot Operated Hyd
| 13***00 | Control Group-Handle; -Rh Joystick | 1 |
1116428 Control Gp-Hydraulic
| 11***28 | Control Group-Hydraulic Pedal; -Auxiliary | 1 |
1764985 Valve Gp-Pilot
| 17***85 | Control Group-Joystick; -Rh-Boom & Work Tool | 1 |
1764986 Valve Gp-Pilot
| 17***86 | Control Group-Joystick; -Lh-Stick & Swing | 1 |
1116284 Control Gp-Pilot Operated Hyd
| 11***84 | Control Group-Pilot Operated Hydraulic | 1 |
| 15***68 | Control Group-Travel | 1 |
| 15***69 | Control Group-Handle | 1 |
1241669 Coupling Gp-Pump
| 12***69 | Coupling Group-Pump | 1 |
1232011 Cover Gp-Pump Control
| 12***11 | Cover Group-Pump Control | 1 |
1183948 Cylinder & Lines Gp-Boom
| 11***48 | Cylinder & Lines Group-Boom; (Boom) | 1 |
| 11***49 | Lines Group-Boom Cylinder; -Lh | 1 |
| 11***23 | Cylinder & Seal Group-Boom; (Boom) | 1 |
1183956 Cylinder & Lines Gp-Boom
| 11***56 | Cylinder & Lines Group-Boom; (Boom) | 1 |
| 11***57 | Lines Group-Boom Cylinder; -Rh | 1 |
| 11***23 | Cylinder & Seal Group-Boom; (Boom) | 1 |
1183966 Cylinder & Lines Gp-Bucket
| 11***66 | Cylinder & Lines Group-Bucket; (Bucket) | 1 |
| 11***68 | Lines Group-Bucket Cylinder; (Bucket Cylinder) | 1 |
| 17***79 | Cylinder & Seal Group-Bucket; (Bucket) | 1 |
1183950 Cylinder & Lines Gp-Stick
| 11***50 | Cylinder & Lines Group-Stick; (Stick) | 1 |
| 11***51 | Lines Group-Stick Cylinder; (Stick Cylinder) | 1 |
| 11***55 | Cylinder & Seal Group-Stick; (Stick) | 1 |
1184023 Cylinder & Seal Gp-Boom
| 11***23 | Cylinder & Seal Group-Boom; (Boom) | 1 |
1713379 Cylinder & Seal Gp-Bucket
| 17***79 | Cylinder & Seal Group-Bucket; (Bucket) | 1 |
1183955 Cylinder & Seal Gp-Stick
| 11***55 | Cylinder & Seal Group-Stick; (Stick) | 1 |
1601862 Drive Gp-Swing
| 16***62 | Drive Group-Swing | 1 |
1141320 Drive Gp-Swing
| 11***20 | Drive Group-Swing | 1 |
1843930 Filter Gp-Hydraulic
| 18***30 | Filter Group-Oil; -Hydraulic, Pilot Supply | 1 |
1620919 Head Gp-Pump Control
| 16***19 | Head Group-Pump Control | 1 |
1620918 Head Gp-Pump Control
| 16***18 | Head Group-Pump Control | 1 |
1282133 Knob As
| 12***33 | Knob As; (Lh)(Control) | 1 |
1282132 Knob As
| 12***32 | Knob As; (Rh)(Control) | 1 |
1211872 Lines Ar-Auxiliary Hydraulic
| 12***72 | Lines Ar-Auxiliary Hydraulic | 1 |
| 12***73 | Stick Group | 1 |
| 14***61 | Lines Group-Auxiliary Hydraulic; (Auxiliary Hydraulic) | 1 |
1579253 Lines Gp-Auxiliary Hydraulic
| 15***53 | Lines Group-Auxiliary Hydraulic | 1 |
1426661 Lines Gp-Auxiliary Hydraulic
| 14***61 | Lines Group-Auxiliary Hydraulic; (Auxiliary Hydraulic) | 1 |
1579239 Lines Gp-Boom
| 15***39 | Lines Group-Boom; (Boom) | 1 |
1183957 Lines Gp-Boom Cylinder
| 11***57 | Lines Group-Boom Cylinder; -Rh | 1 |
1183949 Lines Gp-Boom Cylinder
| 11***49 | Lines Group-Boom Cylinder; -Lh | 1 |
1183968 Lines Gp-Bucket Cylinder
| 11***68 | Lines Group-Bucket Cylinder; (Bucket Cylinder) | 1 |
1601855 Lines Gp-Front-Part 1 Of 2
| 16***55 | Lines Group-Front | 1 |
1601855 Lines Gp-Front-Part 2 Of 2
| 16***55 | Lines Group-Front | 1 |
1579249 Lines Gp-Front
| 15***49 | Lines Group-Front; (Front) | 1 |
1579256 Lines Gp-Pilot
| 15***56 | Lines Group-Pilot; (Pilot) | 1 |
1601858 Lines Gp-Pilot
| 16***58 | Lines Group-Pilot | 1 |
1579251 Lines Gp-Pilot
| 15***51 | Lines Group-Pilot; (Pilot) | 1 |
1579250 Lines Gp-Pilot
| 15***50 | Lines Group-Pilot; (Pilot) | 1 |
1601857 Lines Gp-Pilot
| 16***57 | Lines Group-Pilot | 1 |
1601850 Lines Gp-Pump-Part 1 Of 2
| 16***50 | Lines Group-Pump | 1 |
1601850 Lines Gp-Pump-Part 2 Of 2
| 16***50 | Lines Group-Pump | 1 |
1601851 Lines Gp-Return & Filter-Part 1 Of 2
| 16***51 | Lines Group-Return & Filter | 1 |
1601851 Lines Gp-Return & Filter-Part 2 Of 2
| 16***51 | Lines Group-Return & Filter | 1 |
0875466 Lines Gp-Stick
| 08***66 | Lines Group-Stick; (Stick) | 1 |
1183951 Lines Gp-Stick Cylinder
| 11***51 | Lines Group-Stick Cylinder; (Stick Cylinder) | 1 |
1601854 Lines Gp-Swing Motor
| 16***54 | Lines Group-Swing Motor | 1 |
1601853 Lines Gp-Travel Motor
| 16***53 | Lines Group-Travel Motor | 1 |
1617929 Lines Gp-Travel Motor
| 16***29 | Lines Group-Travel Motor | 1 |
1119950 Valve Gp-Manifold & Reducing
| 11***50 | Manifold Group-Control; -Pilot Manifold | 1 |
1623687 Motor & Mtg Gp-Swing
| 16***87 | Motor & Mtg Group-Swing | 1 |
1077028 Motor & Mtg Gp-Travel
| 10***28 | Motor & Mtg Group-Travel | 1 |
1077029 Motor Gp-Travel
| 10***29 | Motor Group-Piston | 1 |
1765107 Motor Gp-Swing-Part 2 Of 2
| 17***07 | Motor Group-Swing | 1 |
1623689 Motor Gp-Swing
| 16***89 | Motor Group-Swing | 1 |
1765107 Motor Gp-Swing-Part 1 Of 2
| 17***07 | Motor Group-Swing | 1 |
1601849 Mounting Gp-Valve
| 16***49 | Mounting Group-Valve | 1 |
6e4793 Plug Gp
| 6E***93 | Plug Group-Control Valve | 1 |
6e2746 Plug Gp
| 6E***46 | Plug Group-Control Valve | 1 |
6e4816 Plug Gp
| 6E***46 | Plug Group-Control Valve | 1 |
| 6E***93 | Plug Group-Control Valve | 1 |
| 6E***16 | Plug Group-Control Valve | 1 |
1621325 Pump & Mounting Gp
| 16***25 | Pump & Mounting Group | 1 |
1620917 Pump Gp-Double Piston
| 16***17 | Pump Group-Double Piston | 1 |
1262083 Pump Gp-Gear
| 12***83 | Pump Group-Gear; (Gear) | 1 |
1336896 Pump Gp-Gear
| 13***96 | Pump Group-Gear | 1 |
1336911 Pump Gp-Gear
| 12***83 | Pump Group-Gear; (Gear) | 1 |
| 13***96 | Pump Group-Gear | 1 |
| 13***11 | Pump Group-Gear | 1 |
1262073 Pump Gp-Hydraulic
| 12***73 | Pump Group-Main Hydraulic | 1 |
0874781 Rotating Gp-Pump
| 08***81 | Rotating Group-Pump | 1 |
0874780 Rotating Gp-Pump
| 08***80 | Rotating Group-Pump | 1 |
0874782 Rotating Gp-Pump
| 08***82 | Rotating Group-Pump | 1 |
4i6263 Rotor Gp-Swivel
| 4I***63 | Rotor Group-Swivel; (Swivel) | 1 |
1373706 Screen Gp
| 13***06 | Screen Group | 1 |
1597841 Swivel Gp
| 15***41 | Swivel Group; Swivel Gp-025 6 | 1 |
1519779 Tank & Filter Gp-Hydraulic-Part 1 Of 2
| 15***79 | Tank & Filter Group-Hydraulic | 1 |
1519778 Tank & Mtg Gp-Hydraulic
| 15***78 | Tank & Mtg Group-Hydraulic | 1 |
1843850 Valve Ar
| 12***01 | Film Group | 1 |
| 15***56 | Lines Group-Pilot; (Pilot) | 1 |
| 18***50 | Valve Ar | 1 |
4i6363 Valve As-Ball
| 4I***63 | Valve As-Ball; (1-Pump/2-Pump Flow) | 1 |
1913149 Valve As-Ball
| 19***49 | Valve As-Manual | 1 |
1519746 Valve Gp-Check
| 15***46 | Valve Group-Check | 1 |
4i0890 Valve Gp-Check
| 4I***90 | Valve Group-Check | 1 |
7i8136 Valve Gp-Check
| 7I***36 | Valve Group-Check | 1 |
4i6301 Valve Gp-Check & Relief
| 4I***01 | Valve Group-Check & Relief | 1 |
1765075 Valve Gp-Control
| 17***75 | Valve Group-Control | 1 |
1663198 Valve Gp-Control
| 16***98 | Valve Group-Control | 1 |
1765074 Valve Gp-Control-Part 2 Of 2
| 17***74 | Valve Group-Control | 1 |
1663199 Valve Gp-Control-Part 2 Of 2
| 16***99 | Valve Group-Control | 1 |
1663199 Valve Gp-Control-Part 1 Of 2
| 16***99 | Valve Group-Control | 1 |
1765074 Valve Gp-Control-Part 1 Of 2
| 17***74 | Valve Group-Control | 1 |
1057266 Valve Gp-Flow Control
| 10***66 | Valve Group-Flow Control | 1 |
1111141 Valve Gp-Flow Control
| 11***41 | Valve Group-Flow Control | 1 |
1663200 Valve Gp-Main Control
| 16***00 | Valve Group-Main Control | 1 |
1371594 Valve As-Ball
| 13***94 | Valve Group-Manual | 1 |
| 13***43 | Valve Group-Manual | 1 |
| 13***44 | Valve Group-Manual | 1 |
1384243 Valve As-Ball
| 13***43 | Valve Group-Manual | 1 |
1384244 Valve As
| 13***44 | Valve Group-Manual | 1 |
1232419 Valve Gp-Pilot
| 12***19 | Valve Group-Pilot; -Boom Lowering, Drift Reduction | 1 |
1843900 Valve Gp-Pilot
| 18***00 | Valve Group-Pilot; (Middle) | 1 |
1764984 Valve Gp-Pilot
| 17***84 | Valve Group-Pilot; -Joystick-Implement, Swing | 1 |
0856455 Valve Gp-Pilot
| 08***55 | Valve Group-Pilot; -Control Pattern Change | 1 |
1843899 Valve Gp-Pilot
| 18***99 | Valve Group-Pilot; (Quick) | 1 |
1232148 Valve Gp-Pilot
| 12***48 | Valve Group-Pilot; -Platform Travel | 1 |
1557067 Valve Gp-Pilot
| 15***67 | Valve Group-Pilot; (Stick Drift Reduction) | 1 |
1232604 Valve Gp-Pilot
| 12***04 | Valve Group-Pilot; -Third Pedal, Straight Travel | 1 |
1195219 Valve Gp-Pilot
| 11***19 | Valve Group-Pilot; -1-Pump, 2-Pump, Boom Priority | 1 |
6e4281 Valve Gp-Pressure Control
| 6E***81 | Valve Group-Pressure Control | 1 |
1262136 Head Gp-Pump Control
| 12***36 | Valve Group-Pump Control | 1 |
1298030 Valve Gp-Relief
| 12***30 | Valve Group-Relief; -Crossover | 1 |
1710030 Valve Gp-Relief
| 17***30 | Valve Group-Relief; -Work Tool Supply Oil | 1 |
1680547 Valve Gp-Relief
| 16***47 | Valve Group-Relief | 1 |
1092667 Valve Gp-Relief
| 10***67 | Valve Group-Relief; -Negative Flow Control | 1 |
1163600 Valve Gp-Relief
| 11***00 | Valve Group-Relief; -Line-Grapple | 1 |
| 11***01 | Oil Line; (Sub For Ffsb115155), Valve Group-Relief; -Line, Boom Cylinder Head End | 1 |
| 11***10 | Valve Group-Relief; -Line, Boom Cylinder Head End | 1 |
6e5234 Valve Gp-Relief
| 6E***34 | Valve Group-Relief; (Auxiliary Over-Load) | 1 |
1185410 Valve Gp-Relief
| 11***10 | Valve Group-Relief; -Line, Boom Cylinder Head End | 1 |
1095152 Valve Gp-Relief
| 10***52 | Valve Group-Relief; -Negative Flow Control | 1 |
1163601 Valve Gp-Pilot Relief
| 11***01 | Oil Line; (Sub For Ffsb115155), Valve Group-Relief; -Line, Boom Cylinder Head End | 1 |
1077058 Valve Gp-Selector
| 10***58 | Valve Group-Selector; -Hydraulic Activation Control | 1 |
1232496 Valve Gp-Shuttle
| 12***96 | Valve Group-Shuttle | 1 |
1211491 Valve Gp-Solenoid
| 12***91 | Valve Group-Solenoid; -Hydraulic Activation Control | 1 |
1373637 Valve Gp-Solenoid
| 13***37 | Valve Group-Solenoid | 1 |
1211490 Valve Gp-Solenoid
| 12***90 | Valve Group-Solenoid; -Travel | 1 |
1119916 Valve Gp-Press Reducing Sol
| 11***16 | Valve Group-Solenoid; -Grapple Signal-Ground Saw, Grapple Control | 1 |
1163420 Valve Gp-Cushion Crossover Rlf
| 11***20 | Valve Group-Swing Cushion; -Anti-Reaction, Fine Swing | 1 |
1373718 Valve Gp-Traction Control
| 13***18 | Valve Group-Travel Counterbalance | 1 |
Implements
7y2219 Adjuster Gp-Bucket
| 7Y***19 | Adjuster Group-Bucket; -B-Family | 1 |
1579237 Boom Ar-1 Piece Long
| 11***97 | Lines Group-Grease; (Grease) | 1 |
| 11***48 | Cylinder & Lines Group-Boom; (Boom) | 1 |
| 11***50 | Cylinder & Lines Group-Stick; (Stick) | 1 |
1579238 Boom Gp
| 15***38 | Boom Group | 1 |
1422545 Bucket & Adjuster Gp
| 14***45 | Bucket & Adjuster Group; -Excavation, B-Family | 1 |
| 14***52 | Bucket As-Excavation; -B-Family | 1 |
| 7Y***19 | Adjuster Group-Bucket; -B-Family | 1 |
1422552 Bucket As
| 14***52 | Bucket As-Excavation; -B-Family | 1 |
1175497 Lines Gp-Grease
| 11***97 | Lines Group-Grease; (Grease) | 1 |
1174142 Linkage Ar-Bucket
| 11***42 | Linkage Ar-Bucket; -B-Family | 1 |
| 11***66 | Cylinder & Lines Group-Bucket; (Bucket) | 1 |
| 13***33 | Linkage Group-Bucket; (Bucket) | 1 |
1332433 Linkage Gp-Bucket
| 13***33 | Linkage Group-Bucket; (Bucket) | 1 |
1122482 Protector Gp
| 11***82 | Protector Group-Side Bar | 1 |
1122481 Sidecutter Gp
| 11***81 | Sidecutter Group; -Rh, Lh | 1 |
7y0729 Sidecutter Gp
| 7Y***29 | Sidecutter Group; -B-Family | 1 |
1263793 Stick Ar-Hoe
| 08***66 | Lines Group-Stick; (Stick) | 1 |
| 12***93 | Stick Ar-Hoe | 1 |
| 12***61 | Stick Group-Hoe; (Hoe) | 1 |
1211873 Stick Gp
| 12***73 | Stick Group | 1 |
1271161 Stick Gp-Hoe
| 12***61 | Stick Group-Hoe; (Hoe) | 1 |
9w6472 Tip Gp
| 9W***72 | Tip Group; -Center, J-350 | 1 |
9w6473 Tip Gp
| 9W***73 | Tip Group; -J-350 | 1 |
3g3236 Tip Gp-Penetration
| 3G***36 | Tip Group; -J-350 | 1 |
8e3757 Tip Gp-Abrasion
| 8E***57 | Tip Group-Abrasion; -J-350, Heavy-Duty | 1 |
8e3752 Tip Gp-Long
| 8E***52 | Tip Group-Long; -J-350, Heavy-Duty | 1 |
8j4955 Tip Gp-Long
| 8J***55 | Tip Group-Long; -J-350 | 1 |
8j4954 Tip Gp-Short
| 8J***54 | Tip Group-Short; -J-350 | 1 |
8j4953 Tip Gp-Wide
| 8J***53 | Tip Group-Wide; -J-350 | 1 |
Lubrication System
5i7754 Breather Gp
| 5I***54 | Breather Group | 1 |
1252957 Filter Gp-Engine Oil
| 12***57 | Filter Group-Engine Oil; (Engine Oil) | 1 |
1601871 Lines Gp-Drain
| 16***71 | Lines Group-Drain | 1 |
1602043 Lines Gp-Engine Oil
| 16***43 | Lines Group-Engine Oil; (Engine Oil) | 1 |
5i7770 Lines Gp-Turbocharger Oil
| 5I***70 | Lines Group-Turbocharger Oil; (Turbocharger Oil) | 1 |
Operator Station
1557022 Air Conditioner & Mounting Gp
| 15***22 | Air Conditioner & Mounting Group | 1 |
1597855 Air Conditioner Gp
| 15***55 | Air Conditioner Group | 1 |
1680808 Air Conditioner Gp
| 16***08 | Air Conditioner Group | 1 |
1557021 Air Conditioner Gp
| 12***48 | Duct Group-Defroster | 1 |
| 12***49 | Duct Group-Cab Air | 1 |
| 12***50 | Duct Group-Air | 1 |
1229602 Arm As-Wiper
| 12***02 | Arm As-Wiper | 1 |
1474833 Blower Gp
| 14***33 | Blower Group-Cab | 1 |
6i5444 Box Gp-Storage
| 6I***44 | Box Group-Storage | 1 |
1557020 Cab Gp (Basic)-Part 2 Of 2
| 15***20 | Cab Group | 1 |
1557019 Cab Gp (Basic)-Part 2 Of 2
| 15***19 | Cab Group | 1 |
1557019 Cab Gp (Basic)-Part 1 Of 2
| 15***19 | Cab Group | 1 |
1540674 Cab Gp
| 15***74 | Cab Group | 1 |
1556995 Cab Gp
| 15***95 | Cab Group | 1 |
1557020 Cab Gp (Basic)-Part 1 Of 2
| 15***20 | Cab Group | 1 |
1540445 Compressor Gp-Refrigerant
| 15***45 | Compressor Group-Refrigerant | 1 |
1765034 Condenser & Mtg Gp-Air Cond
| 17***34 | Condenser & Mtg Group-Air Cond | 1 |
1557084 Console Gp
| 15***84 | Console Group-Operator; -Rh | 1 |
1116278 Console Gp-Operator
| 11***78 | Console Group-Operator | 1 |
1557008 Console Gp
| 15***08 | Console Group-Operator; -Lh | 1 |
1557039 Cover Gp
| 15***39 | Cover Group-Console | 1 |
1116277 Cover Gp-Storage
| 11***77 | Cover Group-Storage | 1 |
1557027 Cover Gp-Storage
| 15***27 | Cover Group-Storage | 1 |
1680746 Distributor As
| 16***46 | Distributor As | 1 |
1557054 Door Gp-Cab
| 15***54 | Door Group-Cab | 1 |
1557053 Door Gp-Cab
| 15***53 | Door Group-Cab | 1 |
1352255 Duct As
| 13***55 | Duct As | 1 |
1397151 Duct As
| 13***51 | Duct As | 1 |
1282150 Duct Gp-Air
| 12***50 | Duct Group-Air | 1 |
1397150 Duct Gp-Air
| 13***50 | Duct Group-Cab Air | 1 |
1282149 Duct Gp-Air
| 12***49 | Duct Group-Cab Air | 1 |
1282148 Duct Gp-Defrost
| 12***48 | Duct Group-Defroster | 1 |
4i1273 Hatch Gp
| 4I***73 | Hatch Group | 1 |
4i4204 Hatch Gp
| 4I***04 | Hatch Group-Roof | 1 |
1229648 Headrest As
| 12***48 | Headrest As-Seat | 1 |
7y3813 Horn Gp-Electric
| 7Y***13 | Horn Group-Electric | 1 |
1597744 Lever As
| 15***44 | Lever Group-Control; (Hydraulic Controls Lockout) (Hydraulic Activation Control) | 1 |
1765031 Lines Gp-Air Conditioner-Part 1 Of 2
| 17***31 | Lines Group-Air Conditioner | 1 |
1765031 Lines Gp-Air Conditioner-Part 2 Of 2
| 17***31 | Lines Group-Air Conditioner | 1 |
7y0059 Literature Gp
| 09***45 | Cable; (Lanyard) | 1 |
| 5P***58 | Sleeve; (Cable Splice) | 2 |
| 5P***00 | Key Total 2 Pieces Per Unit; (Literature Compartment) | 2 |
1519806 Mirror Gp-Rear View
| 15***06 | Mirror Group-Rear View | 1 |
1060176 Monitor Gp-Operator
| 10***76 | Monitor & Mtg Group-Operator | 1 |
1229603 Motor As-Window Wiper
| 12***03 | Motor As-Window Wiper | 1 |
1540591 Platform Gp-Operator
| 15***91 | Platform Group-Operator | 1 |
1597672 Seat As
| 15***72 | Seat As | 1 |
1540775 Seat As
| 15***75 | Seat As; (Bucket) | 1 |
1229625 Seat Belt Gp
| 12***25 | Seat Belt Group; -Retractable, 3-In | 1 |
1116283 Seat Gp
| 11***83 | Seat Group | 1 |
1243925 Seat Gp
| 12***25 | Seat Group | 1 |
1502200 Seat Gp
| 15***00 | Seat Group | 1 |
1116282 Seat Gp
| 11***82 | Seat Group | 1 |
1519617 Seat Gp
| 15***17 | Seat Group-Suspension | 1 |
1116281 Support Gp-Seat
| 11***81 | Support Group-Seat | 1 |
1300340 Suspension As-Seat
| 13***40 | Suspension As-Seat | 1 |
1243926 Suspension Gp-Seat
| 12***26 | Suspension Group-Seat | 1 |
1116391 Suspension Gp-Seat
| 11***91 | Suspension Group-Seat | 1 |
4i0559 Tank As-Window Washer
| 4I***59 | Tank As-Windshield Washer | 1 |
1519809 Washer Gp-Window
| 15***09 | Washer Group-Window | 1 |
1843965 Window Ar-Cab
| 18***65 | Window Ar-Cab | 1 |
| 18***03 | Window Group-Cab | 1 |
| 18***04 | Film Group; -Cab Window, Rear | 1 |
1844003 Window Gp-Cab
| 18***03 | Window Group-Cab | 1 |
1843966 Window Gp
| 18***66 | Window Group-Cab; -Rear | 1 |
1557058 Window As-Door
| 15***58 | Window Group-Door | 1 |
1557045 Window Gp
| 15***45 | Window Group-Front | 1 |
1557043 Window Gp
| 15***43 | Window Group-Front | 1 |
1557041 Wiper Gp-Window
| 15***41 | Wiper Group-Window | 1 |
Power Train
1601863 Fastener Gp-Swing & Final Dr
| 16***63 | Fastener Group-Swing & Final Dr | 1 |
1141483 Final Drive Gp
| 11***83 | Final Drive Group | 1 |
1141484 Final Drive Gp-Part 1 Of 2
| 11***84 | Final Drive Group | 1 |
1141484 Final Drive Gp-Part 2 Of 2
| 11***84 | Final Drive Group | 1 |
7y1605 Sprocket Gp-Nonsegmented
| 7Y***05 | Sprocket Group-Nonsegmented | 1 |
Service Equipment And Supplies
1844004 Film Gp
| 18***04 | Film Group; -Cab Window, Rear | 1 |
1205101 Film Gp
| 12***01 | Film Group | 1 |
1843888 Film Gp
1765038 Plate & Film Gp-Part 2 Of 3
| 17***38 | Plate & Film Group | 1 |
1765038 Plate & Film Gp-Part 3 Of 3
| 17***38 | Plate & Film Group | 1 |
1765038 Plate & Film Gp-Part 1 Of 3
| 17***38 | Plate & Film Group | 1 |
1765029 Plate & Film Gp-Part 3 Of 3
| 17***29 | Plate & Film Group | 1 |
1765029 Plate & Film Gp-Part 1 Of 3
| 17***29 | Plate & Film Group | 1 |
1765029 Plate & Film Gp-Part 2 Of 3
| 17***29 | Plate & Film Group | 1 |
320B LU serial number reference
The PIN plate is riveted to the upper frame, usually on the right side near the cab/operator platform, and the number is also stamped into the frame itself as a backup if the plate is lost or painted over. For this era the PIN runs 8 characters: a 3-letter prefix followed by a 5-digit sequential number (example: 7ZZ00001). The letters identify the model/build block; match them against a model-prefix reference to confirm the configuration, and the digits show the unit's position in that production run.
| Prefix | Identifies | Notes |
|---|---|---|
| 7ZZ | 320B LU | Long-undercarriage 320B, built at Caterpillar's Akashi, Japan plant. Runs the Cat 3066T turbocharged diesel, about 128 hp (95 kW) net, common to the 320B line. |
| BBG | 320B LU | Long-undercarriage 320B, built at Caterpillar's Akashi, Japan plant, same 3066T engine as the rest of the 320B line. Second dedicated LU serial block alongside 7ZZ on the factory model/prefix reference, separate from the 320B U block; electrical wiring diagrams are shared across the Akashi-built 320B U/LU family. |
Frequently asked questions
What engine powers the Caterpillar 320B LU?
The 320B LU runs the Cat 3066T, a turbocharged 6-cylinder diesel of about 6.4 L displacement rated near 95 kW (128 hp) net / 100 kW (134 hp) gross.
What is the operating weight of a Caterpillar 320B LU?
On the long-undercarriage chassis, the 320B LU weighs about 20,620 kg (45,459 lb), roughly 1,200 kg (1,850 lb) more than the standard-gauge 320B at about 19,400 kg (42,770 lb).
What replaced the Caterpillar 320B LU?
The 320B family was succeeded by the Cat 320C, an all-new generation with electronic engine and hydraulic controls; Cat carried the 320 nameplate forward through the 320D and later Next Generation 320 models.
What 320B LU owners discuss
What do owners and mechanics generally say about the 320B LU's overall reputation?
Community consensus treats the 320B LU as a straightforward mechanical-era workhorse: not flashy, but the 3066T pulls decent power, starts reliably in cold weather, and burns less fuel than some larger classmates. Controls are described as simple enough for a less experienced operator to pick up quickly, and parts commonalty with the wider 320B family keeps replacement components easy to source. The recurring complaints are the usual wear-item costs (undercarriage, hydraulic hoses/seals) and a cab some operators call tight after long shifts. Net take: buy on mechanical/hydraulic condition and maintenance history, not on badge alone.
What hydraulic behavior (pressure loss, stalling under load) do techs commonly report, and how is it diagnosed?
Reports of pressure dropping and the engine bogging or stalling when running two or more functions together usually trace to restricted return flow rather than worn pumps - varnish buildup inside the oil cooler is a frequently cited cause. On the pressure-control side, techs have found simple loose mounting bolts on a pressure regulator cover mimicking a pump or valve fault; retorquing the cover resolved it. Consensus troubleshooting order before condemning a pump: check the negative-flow-control circuit and PRV supply to the pumps, inspect/clean the oil cooler, and verify regulator hardware is tight, then move to pump-output testing. Any hydraulic pressure work involving high-pressure circuits or component removal - have your dealer verify.
Is there a known swing/swing-brake quirk as the machine warms up?
A recurring complaint is the swing function going dead once hydraulic oil reaches operating temperature after working fine cold. Owners and techs point to the swing brake solenoid and its wiring as the first suspect, since power-connection faults at the solenoid are a common root cause on these machines. A second pattern on repeat swing-motor failures is elevated case-drain pressure when several functions run simultaneously, which can cavitate the swing motor over time; separating/isolating the case drain circuit has bought time on affected units. Because serial breaks on this family can carry both a standard swing brake solenoid and a separate fine-swing solenoid, wiring mix-ups during repair are common. Swing brake and solenoid wiring affect machine control on a slope - have your dealer verify the repair before returning to service.
What engine quirks are specific to the mechanically injected 3066T in this era of 320B?
The most cited engine complaint is head gasket seepage. The 3066T uses a dry cylinder liner, so the liner itself does not leak, but the head-to-block seal commonly does, showing up as a slowly dropping coolant level with no visible external puddle. Root cause is often liner protrusion out of tolerance or gasket mismatch, and more than one shop has reported the leak returning even after a straightforward gasket swap, meaning block/head resurfacing or liner protrusion measurement is usually needed rather than a simple reseal. Separately, dark grey-to-black exhaust smoke on a cold start is commonly reported and considered normal for the mechanical injection system if it clears once the engine reaches operating temperature; smoke that persists at operating temperature points to injection timing or pump condition and warrants a proper check.
What electrical or sensor issues come up most often on this generation of 320B?
Two patterns recur. First, auto-throttle mode failing to raise engine rpm while manual throttle works normally - this is treated as a controller/sensor calibration issue rather than an engine problem, and the fix commonly involves recalibrating the speed-sensing setup. Second, speed/timing sensor calibration attempts throwing a fault and refusing to complete; in more than one documented case the sensor itself was fine and the actual fault was a broken or chafed wire feeding the ECM, found only after checking voltage directly at the connector. Community rule of thumb: recalibrate the engine speed controller any time it or its sensor has been removed and reinstalled, and check harness continuity to the ECM before replacing a sensor that tests correctly in isolation.
Does the long-undercarriage (LU) configuration change wear patterns compared to a standard-undercarriage 320B?
The longer track frame and increased ground contact on an LU-style undercarriage is chosen for added stability and flotation on soft or uneven ground, which can reduce ground-bearing pressure per unit area versus a standard-gauge machine. That said, owner consensus is that tracks, rollers, and idlers on these long frames still wear at a normal-to-accelerated pace when the machine works abrasive or rocky material, and because the chain runs longer than a standard undercarriage, replacement cost is higher. Operators recommend tracking undercarriage wear as a percentage during routine checks rather than relying on hours alone, since ground conditions affect wear rate more than runtime does; this applies across the 320B family regardless of undercarriage length.
What should a buyer check specifically before purchasing a used 320B LU?
Rotate the upper house through at least a quarter turn while watching/feeling for play at the swing bearing connection - a worn slew ring is one of the costliest repairs on this class of machine, so budget accordingly if any play is felt. Check boom, stick, and bucket pin/bushing connections for looseness, open the hydraulic pump compartment and inspect all hoses, fittings, and cylinder rods for seepage, and confirm the auto-throttle and gauge cluster function correctly (a known weak point on this series). Ask for maintenance records rather than relying on the hour meter alone, and assess undercarriage wear as a percentage, not just visually. Start the engine cold and note smoke behavior - brief dark smoke that clears is typical for the mechanical injection system, but smoke persisting at operating temperature or any coolant loss without an external leak point toward the head gasket issue common to this engine. Have your dealer verify slew ring condition and any structural or hydraulic findings before finalizing the purchase.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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