Caterpillarexcavator
Caterpillar 320B U
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 320B U is a hydraulic crawler excavator in the 20 to 23 tonne class, part of the second-generation Cat 320 platform built through the mid-to-late 1990s into the early 2000s. Every 320B variant, including the U, uses the Cat 3066T turbocharged diesel: a mechanically governed inline-injection engine displacing 6.4 liters, rated around 128 hp (95 kW) net and 134 hp gross. Operating weight across the 320B family runs roughly 19.4 to 20.6 tonnes (about 42,800 to 45,500 lb) in standard trim, and configurations with longer sticks, wider shoes, or added counterweight push toward the top of the class. The 320B followed the original 320/320 L series and was later succeeded by the 320C generation. Caterpillar sold the 320B under several factory undercarriage and boom-stick configurations, including L for transport-focused versatility, LL for extended reach, N and S for narrow-gauge and severe-duty ground conditions, and U for another dedicated configuration within that same model family.
Changes across the 320B run centered on undercarriage width, counterweight, and boom-stick pairing rather than a new engine or hydraulic architecture. The 3066T and Caterpillar's mechanical monitoring panel, with basic four-digit fault codes instead of a modern ECM, carried through the whole series. What moved the platform from the original 320 to the 320B was mainly refined hydraulic pumps and control valves plus a heavier-duty swing and travel drivetrain; the later jump to 320C brought revised electronics and moved the engine lineup toward tighter emissions control. In the used and parts market today, 320B-family machines like the U stay in service because their mechanical fuel system and simple monitoring panel are easy to diagnose and rebuild without dealer-only electronic tools, and because the platform shares a large parts base with the rest of the 320/322/325B family, which keeps components available long after Caterpillar stopped building new units on this chassis.
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 U specifications
Engine
| Engine model | Cat 3066T, 6-cylinder inline diesel, turbocharged, direct injection |
| Gross power | 100 kW (134 hp) |
| Net power | 95 kW (128 hp) at 1800 rpm |
| Displacement | 6.4 L (389 cu in) |
| Cylinders | 6, inline |
| Emissions tier | No tier rating on this engine; it is a pre-emissions-tier design dating to the early-to-mid 1990s, before nonroad diesel emissions regulation applied |
Weights
| Operating weight, standard undercarriage | 19.4-20.6 t (42,770-45,460 lb) |
| Operating weight, long/narrow/severe-duty undercarriage configs | 20.6-22.5 t (45,460-49,670 lb); varies by undercarriage and counterweight fitted, and no figure specific to this configuration is confirmed in available sources |
| Ground pressure | Not documented for this configuration in available sources |
| Transport weight | Not separately documented; verify with your dealer for the exact shipping weight of this configuration |
Dimensions
| Transport length | 9.3-9.4 m (30.5-30.9 ft), varies by boom/stick option |
| Transport width, over tracks | 2.8-3.2 m (9.2-10.4 ft), varies by track gauge/shoe width |
| Transport height, top of cab | 2.9-3.0 m (9.65-9.7 ft) |
| Tail swing radius | 2.75-2.77 m (9.03-9.1 ft) |
| Track shoe width | 600-800 mm (23.6-31.5 in), varies by undercarriage configuration |
| Ground clearance | 0.475-0.49 m (1.56-1.6 ft) |
| Undercarriage length, track on ground | 3.3-3.65 m (10.7-12.0 ft), varies by standard vs long undercarriage |
Performance
| Max dig depth | 7.58-7.59 m (24.87-24.9 ft), standard boom/stick option |
| Max reach at ground level | 10.63-10.69 m (34.88-35 ft) |
| Max dump/loading height | 6.93-7.0 m (22.74-23 ft) |
| Max cutting height | 9.75-9.8 m (31.99-32 ft) |
| Swing speed | Not documented in available sources |
| Travel speed | 5.5-6.4 km/h (3.4-4 mph) |
| Gradeability | Not documented in available sources |
| Drawbar pull | 177 kN (39,800 lb) |
Forces
| Bucket digging force | Not documented in available sources for this platform |
| Stick/arm digging force | Not documented in available sources for this platform |
Service capacities (summary)
| Fuel tank | 340 L (89.9-90 gal) |
| Hydraulic system | 220 L (58-58.2 gal) |
| Engine oil | 19-21 L (5.1-5.5 gal) |
| Cooling system | 25 L (6.6-6.7 gal) |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
320B U fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 19–20.5 L (5.1–5.4 gal) | Cat DEO (Diesel Engine Oil), API CG-4/CH-4 service class, for the Cat 3066T turbocharged diesel. SAE 10W-30 for ambient -20°C to 40°C (-4°F to 104°F); SAE 15W-40 for -15°C to 50°C (5°F to 122°F) in warmer climates. |
| Cooling system | 25 L (6.6 gal) | Cat DEAC (conventional heavy-duty antifreeze/coolant) as a 50/50 water-glycol premix; Cat ELC (Extended Life Coolant) usable on later production. Full-strength glycol only for extreme cold below -37°C (-34°F). |
| Fuel tank | 340 L (90 gal) | No. 2-D diesel fuel. Use a winter-blend or cold-flow fuel conditioner below -7°C (20°F) to prevent wax gelling in the filters and lines. |
| Hydraulic system total (incl. tank) | 220 L (58 gal) | Cat HYDO Advanced (or equivalent anti-wear hydraulic oil). SAE 10W below 0°C (32°F); SAE 10W-30 multigrade for wide ambient range; SAE 30 above 10°C (50°F) in hot climates. |
| Hydraulic tank | Not broken out separately from the system total — falls within the 220 L (58 gal) figure above | Same Cat HYDO Advanced fluid as the hydraulic system total, graded by ambient per the chart above. |
| Final drive (each) | 10 L (2.6 gal) per side | Cat TDTO (Transmission/Drive Train Oil). SAE 30 above 0°C (32°F); SAE 10W below -20°C (-4°F). |
| Swing drive | 6 L (1.6 gal) | Cat TDTO, same ambient-based grade selection as the final drives. |
| Pilot/servo circuit | No separate reservoir — pilot oil is drawn from the main hydraulic tank | Same Cat HYDO Advanced fluid as the main hydraulic system. |
| Grease (spec only) | N/A — applied per lubrication point, not a bulk fill | Cat Multipurpose Grease (Cat MPGM), NLGI 2 lithium-complex, for pins, bushings, and the swing bearing. Step down to NLGI 1 or 0 in sustained sub-zero service. |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 320B U maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 6,000 h |
|
Servicing the 320B U beyond the schedule
Predictive Maintenance & Fluid Analysis
With no electronic ECM on board, the 320B U's Cat Monitoring System panel gives only basic four-digit alerts, so scheduled S·O·S sampling of engine, hydraulic, swing drive, and final drive oil is the real early-warning system on this machine. Watch crankcase samples for fuel dilution and soot, a sign of injection pump or ring wear on the 3066T. Sample coolant regularly for liner and radiator core condition, and track hydraulic oil cleanliness closely, since the mechanical pump and valve group have no self-diagnostics to flag wear early.
Corrective & Common Repairs
Surging idle or inconsistent RPM on the 3066T usually traces to governor linkage wear or a gummed injection pump bore, not an electronic fault; clean and reseal the pump before condemning it. Weak swing power points to a worn swing motor or a tired swing bearing rather than the engine. Slow boom or track response often comes from worn main pump swash plates or barrels, not valve blockage. Keep the undercarriage clear of packed debris; it pushes travel motor face seals out of place and causes final drive leaks.
Overhaul & Rebuild Points
High-hour 320B U units typically need the swing gear and bearing rebuilt before the final drives, since constant load cycling wears the ring gear and bearing race faster than travel components. Final drive motors and reduction gearing come next, followed by the main hydraulic pump and control valve group once swash plates and spools wear past tolerance. The 3066T's mechanical fuel system and cast iron cylinder liners are straightforward to overhaul without dealer electronics, making a top-end rebuild practical once compression drops and oil consumption climbs.
Seasonal & Environment Servicing
In cold climates, check coolant freeze protection and use a winter-grade fuel blend to keep the mechanical injection pump from gelling; the 3066T has no electronic cold-start assist, so glow plug or ether-start aids need regular inspection. In hot, dusty sites, clean the radiator and hydraulic oil cooler cores more often and shorten air filter service intervals, since a plugged filter starves the turbocharged engine of boost. In wet or muddy conditions, wash packed material from the undercarriage regularly to protect travel motor seals and track components.
320B U fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| 1302 | Engine oil pressure is too low for current engine speed. | Low oil level, plugged oil filter, worn oil pump, or a faulty oil pressure sensor/switch. | Shut the engine down, check oil level and filter condition, and verify sensor wiring before restarting. |
| 1303 | Engine coolant temperature is too high. | Low coolant level, a clogged radiator core, a stuck thermostat, a slipping fan drive, or a faulty coolant temperature sensor. | Idle the engine to cool it down, check coolant level and radiator fins for debris, and inspect the fan drive and thermostat before returning to work. |
| 1304 | Hydraulic oil temperature is too high. | Low hydraulic oil level, a clogged oil cooler, a failed cooling fan, a relief valve stuck open, or sustained heavy load in hot ambient conditions. | Reduce load and let the hydraulic system cool, check oil level and cooler fins for blockage, and confirm the cooling fan is turning. |
| 1305 | Inlet filter element is blocked beyond the allowable restriction limit. | A dirty or collapsed air filter element from dusty operating conditions, or a faulty restriction sensor. | Inspect and replace the filter element, then confirm the restriction warning clears. |
| 2201 | System/battery voltage is abnormal. | A weak or failing battery, loose or corroded battery terminals, a faulty alternator, or a bad voltage regulator. | Test battery voltage and charging voltage at the terminals, check connections for corrosion, and inspect alternator output. |
| 2202 | Governor actuator feedback sensor circuit is open or shorted to battery voltage. | A damaged or corroded governor connector/harness, chafed wiring, or a failed feedback sensor in the governor actuator. | Inspect the governor actuator connector and harness for damage or corrosion, check circuit voltage against spec, and repair or replace as needed. |
| 2302 | Governor actuator feedback signal is erratic or unstable. | A worn or sticking governor actuator, a binding throttle linkage or cable, a corroded feedback sensor connector, or out-of-spec supply voltage at the actuator connector. | Disconnect the governor connector and check supply/signal voltages at the pins against spec, inspect linkage for binding, and recalibrate the governor actuator after any repair. |
| 2304 | Governor actuator does not move when commanded. | A seized or mechanically jammed actuator, a broken or disconnected throttle cable/linkage, or a failed actuator motor. | Check linkage and cable for binding or breakage, verify actuator motor operation, and replace the actuator if it still fails to respond with linkage confirmed free. |
| 3201 | Calibration data error in the monitor/governor system. | Lost stored calibration after a control module or battery disconnect, corrupted memory, or an incomplete prior calibration procedure. | Recalibrate the governor actuator and monitor system per the machine's calibration procedure and confirm the code clears. |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
320B U attachments & work tools
Buckets
General-purpose and heavy-duty buckets for this size class run roughly 0.9-1.5 m3 (1.2-2.0 yd3) heaped, in widths of about 900 to 1370 mm (36-54 in). Severe-duty rock buckets are narrower and smaller, roughly 0.45-1.0 m3 (0.6-1.3 yd3) in 600 to 1070 mm (24-42 in) widths for harder digging. Buckets use the 320B-family (B-linkage) bucket pivot with 80 mm bucket pins; pin-on mounting is the base configuration, with a matching pin-grabber quick coupler available for tool-less changes.
Hydraulic hammers
Operating weight for this platform runs roughly 20-23 t, placing it in the medium Cat GC-hammer class (H115 GC to H120 GC range, recommended carrier weight roughly 13-26 t depending on model). The H120 GC runs a service weight near 1,300 kg, rated flow of about 80-125 l/min, and operating pressure near 14 MPa (2,030 psi), with blow rate around 350-620 bpm. Non-Cat breakers pitched at this size class run similar tool-weight and flow ranges; confirm flow and pressure against the actual auxiliary circuit before fitting a hammer at the top of the class.
Quick couplers
A pin-grabber hydraulic coupler sized to the 80 mm bucket pins and B-linkage bucket geometry is the standard fit for this class, letting the operator swap bucket, hammer, thumb, and grapple without driving pins. Ear spacing and pin-center dimensions vary by coupler brand/series (reported roughly 300-320 mm ear spacing, 445-470 mm pin centers), so match the coupler to the specific bucket and tool set being run rather than assuming one fixed dimension.
Thumbs/grapples
Pin-on hydraulic thumb kits sized to the 80 mm bucket pin and matching bucket width are available for this class and clamp using the machine's auxiliary work-tool hydraulic circuit; mechanical (manual-clamp) thumbs are also common on this size of carrier. Hydraulic grapples, including demolition/sorting and rotating types, are offered for this class for material handling and demolition work. The machine's own hydraulic system carries a dedicated grapple/tool-control valve group, confirming factory provision for running a grapple or similar clamp-type tool off the auxiliary circuit.
Rippers
Single-shank, single-tooth rippers built to the 320B B-linkage pin-on system are offered for this class, used to pre-rip hard or frozen ground, pull roots or rock, or do light demolition work ahead of bucket digging.
Hydraulic circuit / work-tool kit notes
The factory hydraulic system includes a dedicated auxiliary/work-tool supply line group, a work-tool-supply relief valve, and a hydraulic-activation-control valve/solenoid group, so single- and double-acting tools (thumb, grapple, hammer) run off a built-in circuit rather than needing off-machine plumbing. Main system relief runs in the 31-34 MPa (4,500-4,950 psi) class; a hammer or other high-flow tool near the top of this carrier's weight class may still call for a higher-flow auxiliary kit beyond the base tool circuit -- verify actual circuit flow and pressure before ordering a tool at the upper end of the range.
All 320B U assemblies by section
Every catalogued assembly group for the Caterpillar 320B U. 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 |
1252955 Crankshaft Gp
| 12***55 | Crankshaft Group | 1 |
5i7972 Crankshaft Gp
| 5I***72 | Crankshaft Group | 1 |
1352340 Cylinder Block Gp
| 13***40 | Cylinder Block Group | 1 |
1352339 Cylinder Block Gp
| 13***39 | 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 |
5i7757 Housing Gp-Front
| 5I***57 | Housing Group-Front; (Front) | 1 |
5i7971 Housing Gp-Front
| 5I***71 | 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 |
1253016 Pump Gp-Water
| 12***16 | Pump Group-Water; (Water) | 1 |
5i7973 Pump Gp-Water
| 5I***73 | 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 1 Of 3
| 17***54 | Battery & Wiring Group | 1 |
1709454 Battery & Wiring Gp-Part 3 Of 3
| 17***54 | Battery & Wiring Group | 1 |
1709454 Battery & Wiring Gp-Part 2 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 |
1160080 Cable As
| 11***80 | Cable As; (Jumper) | 1 |
1613076 Cable As
| 16***76 | Cable As | 1 |
1573219 Control & Mtg Gp-Electronic
| 15***19 | Control & Mtg Group-Electronic | 1 |
1507021 Converter Gp-Electrical
| 15***21 | Converter Group-Electrical | 1 |
1830996 Harness As-Part 1 Of 3
| 18***96 | Harness As | 1 |
1613089 Harness As
| 16***89 | Harness As | 1 |
1507022 Harness As
| 15***22 | Harness As | 1 |
| 15***23 | Harness As | 1 |
| 15***24 | Harness As | 1 |
1830996 Harness As-Part 3 Of 3
| 18***96 | Harness As | 1 |
1830996 Harness As-Part 2 Of 3
| 18***96 | Harness As | 1 |
1673595 Harness As
| 16***95 | Harness As | 1 |
1160258 Harness As
| 11***58 | Harness As | 1 |
| 11***59 | Harness As | 1 |
| 11***60 | Harness As | 1 |
1507023 Harness As
| 15***23 | Harness As | 1 |
1160260 Harness As
| 11***60 | Harness As | 1 |
1706861 Harness As-Part 2 Of 3
| 17***61 | Harness As | 1 |
1706861 Harness As-Part 3 Of 3
| 17***61 | Harness As | 1 |
1673494 Harness As
| 16***94 | Harness As | 1 |
1160243 Harness As
| 11***43 | Harness As; (Cab) | 1 |
1507024 Harness As
| 15***24 | Harness As | 1 |
1706861 Harness As-Part 1 Of 3
| 17***61 | Harness As | 1 |
1613088 Harness As
| 16***88 | Harness As | 1 |
1160259 Harness As
| 11***59 | Harness As | 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 |
1532491 Harness As-Console
| 15***91 | Harness As-Console | 1 |
1507001 Harness As-Console-Part 2 Of 2
| 15***01 | Harness As-Console; (Console) | 1 |
1507001 Harness As-Console-Part 1 Of 2
| 15***01 | Harness As-Console; (Console) | 1 |
1507000 Harness As-Console-Part 2 Of 2
| 15***00 | Harness As-Console; (Console) | 1 |
1507000 Harness As-Console-Part 1 Of 2
| 15***00 | Harness As-Console; (Console) | 1 |
1506991 Harness As-Wiring
| 15***91 | Harness As-Wiring; (Wiring) | 1 |
1506990 Harness As-Wiring
| 15***90 | Harness As-Wiring; (Wiring) | 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 |
1506989 Harness As-Wiring
| 15***89 | Harness As-Wiring | 1 |
| 15***90 | Harness As-Wiring; (Wiring) | 1 |
| 15***91 | Harness As-Wiring; (Wiring) | 1 |
1532556 Harness As-Wiring
| 15***56 | Harness As-Wiring; (Wiring) | 1 |
1532557 Harness As-Wiring
| 15***57 | Harness As-Wiring; (Wiring) | 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 |
1114813 Lamp Gp-Flood
| 11***13 | Lamp Group-Flood; -Cab | 1 |
1385160 Lighting Gp-Boom
| 13***60 | Lighting Group-Boom; (Boom) | 1 |
1160214 Lighting Gp-Boom
| 11***14 | Lighting Group-Boom; -Long Boom, Rh | 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 |
1352344 Mounting Gp-Alternator
| 13***44 | Mounting Group-Alternator; (Alternator) | 1 |
1252962 Mounting Gp-Alternator
| 12***62 | 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 |
1752314 Switch As-Magnetic
| 17***14 | Switch As-Magnetic; (Magnetic) | 1 |
1752313 Switch As-Magnetic
| 17***13 | 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 |
1060054 Wiring Gp-Cab
| 10***54 | Wiring Group-Cab | 1 |
1160159 Wiring Gp
| 11***59 | Wiring Group-Cab | 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 |
1060058 Wiring Gp-Console
| 10***58 | Wiring Group-Console; -Rh | 1 |
1507025 Wiring Gp-Radio
| 15***25 | Wiring Group-Radio | 1 |
Engine Arrangement
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 |
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 1 Of 2
| 12***53 | Housing Group-Flywheel | 1 |
| 12***57 | Filter Group-Engine Oil; (Engine Oil) | 1 |
| 13***40 | Cylinder Block Group | 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 |
1175483 Frame As-Undercarriage
| 11***83 | Frame As-Undercarriage | 1 |
1175476 Frame As-Undercarriage
| 11***76 | Frame As-Undercarriage | 1 |
1519752 Frame Gp-Upper
| 15***52 | Frame Group-Upper | 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 |
1141340 Gear & Bearing Gp-Part 1 Of 2
| 11***40 | 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 |
1519802 Guard Gp-Bottom
| 15***02 | Guard Group-Bottom | 1 |
1624379 Guard Gp-Bottom
| 16***79 | Guard Group-Bottom; (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 2 Of 3
| 15***03 | Hood & Guard Group | 1 |
1519803 Hood & Guard Gp-Part 3 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 |
1156421 Idler Gp-Front
| 11***21 | Idler Group-Front; -Lh | 1 |
1132907 Idler Gp-Front
| 11***07 | Idler Group-Front; (Front) (C) | 1 |
1156419 Idler Gp-Front
| 11***19 | Idler Group-Front | 1 |
1156420 Idler Gp-Front
| 11***20 | Idler Group-Front; -Rh | 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 |
9w9353 Link As-Track
| 9W***53 | Link As-Track; -Sealed, Lubricated | 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 |
1156423 Track Adjuster & Recoil Gp
| 11***23 | Track Adjuster & Recoil Group; -Lh | 1 |
1156424 Track Adjuster & Recoil Gp
| 11***24 | Track Adjuster & Recoil Group | 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 |
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 |
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 |
1941920 Track Gp
| 12***62 | Shoe; (Track) | 45 |
| 19***09 | Link As-Track; (Track) | 1 |
| 19***20 | Track Group; -2-Required | 1 |
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 |
9w9360 Track Gp
| 12***62 | Shoe; (Track) | 45 |
| 9W***61 | Nut - Track (M20x1.5-6g Thd) | 180 |
| 9W***19 | Bolt - Track (M20x1.5x55mm) | 180 |
1177120 Track Gp
| 11***20 | Track Group | 1 |
| 6I***54 | Shoe-Track | 45 |
| 9W***61 | Nut - Track (M20x1.5-6g Thd) | 180 |
9w9356 Track Gp
| 12***62 | Shoe; (Track) | 49 |
| 9W***61 | Nut - Track (M20x1.5-6g Thd) | 196 |
| 9W***19 | Bolt - Track (M20x1.5x55mm) | 196 |
1941910 Track Gp
| 12***62 | Shoe; (Track) | 49 |
| 19***08 | Link As-Track; (Track) | 1 |
| 19***10 | Track Group; -2-Required | 1 |
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 |
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 2 Of 6
| 15***48 | Pump Group-Fuel Injection; (Fuel Injection) | 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 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 2 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 5 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 6 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 |
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
4i1536 Accumulator Gp
| 4I***36 | Accumulator Group-Hydraulic; -Charged-Pilot Oil | 1 |
5i8416 Accumulator Gp
| 5I***16 | 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 |
0874454 Accumulator Gp
| 08***54 | 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 |
1337900 Control Gp-Pilot Operated Hyd
| 13***00 | Control Group-Handle; -Rh Joystick | 1 |
1337899 Control Gp-Pilot Operated Hyd
| 13***99 | Control Group-Handle; -Lh Joystick | 1 |
1540569 Control Gp-Pilot Operated Hyd
| 15***69 | Control Group-Handle | 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 |
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 |
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 |
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 |
1183949 Lines Gp-Boom Cylinder
| 11***49 | Lines Group-Boom Cylinder; -Lh | 1 |
1183957 Lines Gp-Boom Cylinder
| 11***57 | Lines Group-Boom Cylinder; -Rh | 1 |
1183968 Lines Gp-Bucket Cylinder
| 11***68 | Lines Group-Bucket Cylinder; (Bucket Cylinder) | 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 |
1601855 Lines Gp-Front-Part 1 Of 2
| 16***55 | Lines Group-Front | 1 |
1601858 Lines Gp-Pilot
| 16***58 | Lines Group-Pilot | 1 |
1579256 Lines Gp-Pilot
| 15***56 | Lines Group-Pilot; (Pilot) | 1 |
1601857 Lines Gp-Pilot
| 16***57 | Lines Group-Pilot | 1 |
1579250 Lines Gp-Pilot
| 15***50 | Lines Group-Pilot; (Pilot) | 1 |
1579251 Lines Gp-Pilot
| 15***51 | Lines Group-Pilot; (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 2 Of 2
| 16***51 | Lines Group-Return & Filter | 1 |
1601851 Lines Gp-Return & Filter-Part 1 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 |
1623689 Motor Gp-Swing
| 16***89 | Motor Group-Swing | 1 |
1765107 Motor Gp-Swing-Part 2 Of 2
| 17***07 | 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 |
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 |
6e4793 Plug Gp
| 6E***93 | 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 |
1336911 Pump Gp-Gear
| 12***83 | Pump Group-Gear; (Gear) | 1 |
| 13***96 | Pump Group-Gear | 1 |
| 13***11 | Pump Group-Gear | 1 |
1262083 Pump Gp-Gear
| 12***83 | Pump Group-Gear; (Gear) | 1 |
1336896 Pump Gp-Gear
| 13***96 | Pump Group-Gear | 1 |
1262073 Pump Gp-Hydraulic
| 12***73 | Pump Group-Main Hydraulic | 1 |
0874782 Rotating Gp-Pump
| 08***82 | Rotating Group-Pump | 1 |
0874780 Rotating Gp-Pump
| 08***80 | Rotating Group-Pump | 1 |
0874781 Rotating Gp-Pump
| 08***81 | 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 |
1765074 Valve Gp-Control-Part 1 Of 2
| 17***74 | Valve Group-Control | 1 |
1663199 Valve Gp-Control-Part 1 Of 2
| 16***99 | Valve Group-Control | 1 |
1663199 Valve Gp-Control-Part 2 Of 2
| 16***99 | Valve Group-Control | 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 |
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 |
1384244 Valve As
| 13***44 | Valve Group-Manual | 1 |
1384243 Valve As-Ball
| 13***43 | Valve Group-Manual | 1 |
1232148 Valve Gp-Pilot
| 12***48 | Valve Group-Pilot; -Platform Travel | 1 |
1232604 Valve Gp-Pilot
| 12***04 | Valve Group-Pilot; -Third Pedal, Straight Travel | 1 |
1843899 Valve Gp-Pilot
| 18***99 | Valve Group-Pilot; (Quick) | 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 |
1195219 Valve Gp-Pilot
| 11***19 | Valve Group-Pilot; -1-Pump, 2-Pump, Boom Priority | 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 |
1557067 Valve Gp-Pilot
| 15***67 | Valve Group-Pilot; (Stick Drift Reduction) | 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 |
1680547 Valve Gp-Relief
| 16***47 | Valve Group-Relief | 1 |
1092667 Valve Gp-Relief
| 10***67 | Valve Group-Relief; -Negative Flow Control | 1 |
1710030 Valve Gp-Relief
| 17***30 | Valve Group-Relief; -Work Tool Supply Oil | 1 |
1095152 Valve Gp-Relief
| 10***52 | 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 |
1298030 Valve Gp-Relief
| 12***30 | Valve Group-Relief; -Crossover | 1 |
1185410 Valve Gp-Relief
| 11***10 | Valve Group-Relief; -Line, Boom Cylinder Head End | 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 |
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 |
1373637 Valve Gp-Solenoid
| 13***37 | Valve Group-Solenoid | 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 |
9w6473 Tip Gp
| 9W***73 | Tip Group; -J-350 | 1 |
3g3236 Tip Gp-Penetration
| 3G***36 | Tip Group; -J-350 | 1 |
9w6472 Tip Gp
| 9W***72 | Tip Group; -Center, 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 1 Of 2
| 15***20 | Cab Group | 1 |
1540674 Cab Gp
| 15***74 | 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 |
1556995 Cab Gp
| 15***95 | Cab Group | 1 |
1557020 Cab Gp (Basic)-Part 2 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 |
1116278 Console Gp-Operator
| 11***78 | Console Group-Operator | 1 |
1557084 Console Gp
| 15***84 | Console Group-Operator; -Rh | 1 |
1557008 Console Gp
| 15***08 | Console Group-Operator; -Lh | 1 |
1557039 Cover Gp
| 15***39 | Cover Group-Console | 1 |
1557027 Cover Gp-Storage
| 15***27 | Cover Group-Storage | 1 |
1116277 Cover Gp-Storage
| 11***77 | Cover Group-Storage | 1 |
1680746 Distributor As
| 16***46 | Distributor As | 1 |
1557053 Door Gp-Cab
| 15***53 | Door Group-Cab | 1 |
1557054 Door Gp-Cab
| 15***54 | Door Group-Cab | 1 |
1397151 Duct As
| 13***51 | Duct As | 1 |
1352255 Duct As
| 13***55 | Duct As | 1 |
1282150 Duct Gp-Air
| 12***50 | Duct Group-Air | 1 |
1282149 Duct Gp-Air
| 12***49 | Duct Group-Cab Air | 1 |
1397150 Duct Gp-Air
| 13***50 | 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 |
1502200 Seat Gp
| 15***00 | Seat Group | 1 |
1116282 Seat Gp
| 11***82 | Seat Group | 1 |
1243925 Seat Gp
| 12***25 | Seat Group | 1 |
1116283 Seat Gp
| 11***83 | 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 |
1843966 Window Gp
| 18***66 | Window Group-Cab; -Rear | 1 |
1844003 Window Gp-Cab
| 18***03 | Window Group-Cab | 1 |
1557058 Window As-Door
| 15***58 | Window Group-Door | 1 |
1557043 Window Gp
| 15***43 | Window Group-Front | 1 |
1557045 Window Gp
| 15***45 | 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
| 18***88 | Film Group | 1 |
1765038 Plate & Film Gp-Part 2 Of 3
| 17***38 | Plate & Film Group | 1 |
1765029 Plate & Film Gp-Part 1 Of 3
| 17***29 | Plate & Film Group | 1 |
1765038 Plate & Film Gp-Part 3 Of 3
| 17***38 | Plate & Film Group | 1 |
1765029 Plate & Film Gp-Part 2 Of 3
| 17***29 | 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 |
320B U serial number reference
On the 320B U the PIN plate is riveted to the right-hand side of the main frame, just ahead of the cab base near the fuel tank. Read the first 3 letters as the serial prefix (identifies the build series) and the digits that follow as the machine's sequence number. On machines carrying a full 17-character PIN, the same 3-letter prefix and sequence number sit inside the last 8 characters.
| Prefix | Identifies | Notes |
|---|---|---|
| BAN | 320B U | Serial prefix used for 320B U production machines fitted with the Cat 3066 diesel (turbocharged air intake/exhaust hardware per the machine's own build record). Parts-revision breakpoints show this range still active through at least mid-2000. Frame, undercarriage and cooling groups are cataloged separately from the 320B L, LL and LU siblings, so don't cross-apply their part numbers. |
| BBG | 320B U | Second serial prefix used for 320B U production, paired with BAN throughout the machine's own parts catalog across fuel injection, cooling arrangement, engine arrangement and track-link listings. One external reference associates this code with the 320B LU sibling instead, so the two variants may share coverage on a common boom/stick option in places - confirm with your dealer before ordering parts unique to this range. |
Frequently asked questions
What engine powers the Caterpillar 320B U?
The 320B U uses the Cat 3066T, a turbocharged, mechanically governed diesel displacing 6.4 liters and rated at approximately 128 hp (95 kW) net, 134 hp gross. It runs a mechanical fuel injection system with a basic Caterpillar Monitoring System panel rather than a full electronic ECM.
What is the operating weight of the Caterpillar 320B U?
Operating weight across 320B-family configurations runs from about 19.4 to roughly 20.6 tonnes (42,800 to 45,500 lb) in standard trim, and can run higher toward the top of the 20 to 23 tonne class depending on undercarriage, counterweight, and boom/stick selection. Exact figures vary by configuration.
What replaced the Caterpillar 320B U?
Caterpillar moved the 320 platform to the 320C generation as the direct successor to the 320B family. The 3066-based engine architecture and mechanical monitoring approach used on the 320B U were phased out as later 320 generations adopted revised electronics and updated emissions-tier engines.
What 320B U owners discuss
How does the hydraulic system typically behave as a 320B U ages, and what do mechanics check first?
The twin-pump hydraulic system generally holds up over a long service life, but sluggish or weak function response is the most common age-related complaint on 320B-family machines. Techs trace slow speed and low working pressure most often to worn swash plates, scored pump barrels, or broken return springs in the main piston pumps, not the control valve. Contaminated oil and clogged case-drain or return filters get blamed just as often, so fluid condition and filters are checked before a pump gets pulled. If every hydraulic function is weak or unresponsive at once despite full engine RPM and normal suction flow, the pilot circuit and pump destroke (PRV) pressure get checked before the pumps are condemned.
What engine quirks come up with the powertrain used in this series?
This series runs a turbocharged diesel closely related in core design to the Mitsubishi S6K/S6KT - some owners just call it 'the Mitsubishi engine.' A common, generally normal quirk: dark gray to black smoke on cold start that clears once the engine is under load and warmed up, then returns at idle, tied to injection timing on this mechanically governed, pre-emissions engine rather than a fault by itself. On units pushed well past a normal overhaul interval without a rebuild, owners report recurring top-end work (injectors, cylinder head) and occasionally crankshaft or block issues. Early-shift overheating gets mentioned occasionally and traces more often to the radiator, fan drive, or water pump than to the block itself.
What causes stalling or power loss under load, and how is it usually chased down?
Bogging or stalling as soon as boom, stick, or swing load comes on is a recurring complaint. The cause splits between fuel delivery (weak lift pump, dirty fuel filters, air in the system) and the hydraulic side (pump destroke/PRV pressure set too low so the engine can't recover once pump load spikes). Checking and changing fuel filters and bleeding the system is the standard first step since it is quick and cheap; pilot and PRV pressures get checked against factory spec next if the stall persists.
What undercarriage or track wear patterns show up most on this machine type?
Undercarriage is the highest ongoing wear cost, as on most excavators this size. Owners commonly report track shoes, rollers, and idlers wearing faster than expected on rocky or abrasive ground, and note that running track too tight accelerates roller and idler wear well beyond normal. Warning signs mechanics watch for: the machine pulling to one side while tracking, unusual noise from a roller or idler, or a rougher ride than normal - all pointing to a bearing or seal starting to fail. Regular checks for cracking, oil weeping at idler and roller seals, and correct track tension are the standard preventive routine cited across the board.
What swing-system problems come up, and is there a safety-critical item to flag?
Swing motor and swing gear/bearing failures show up repeatedly in owner reports. One recurring failure pattern is repeated swing motor burnout traced to pilot pressure set too low, whether from the factory or after a rebuild, combined with case-drain pressure climbing when multiple functions run at once - both point to a pressure-setting problem rather than a bad motor. A broken tooth on the swing pinion or ring gear can lock the upperstructure at certain rotation points, which can be mistaken for a hydraulic fault. Because swing pilot and relief pressures affect how predictably the machine stops rotating and how it holds a suspended load, have your dealer verify these pressures against factory spec rather than adjusting by feel.
What electrical or sensor issues come up most in owner and mechanic discussions?
Nuisance electrical faults trace back to the wiring harness far more often than to a bad sensor or module: corroded or loose connector pins, and bad crimps inside a plug that look fine from the outside but still cause intermittent fault codes. The engine speed-sensing pickup near the bellhousing is called out specifically as prone to fouling, since it is magnetic and collects worn metal fines shed by the starter ring gear, which throws off false readings. Dead or erratic gauges and dropped power to accessories such as cab A/C trace back to fuses, relays, and harness connectors more often than to the gauge or module itself, so a harness and connector inspection is the standard first step before replacing parts.
What should a buyer check before purchasing a used 320B U?
Beyond hours and service records, walk the undercarriage for uneven wear, oil weeping at roller and idler seals, and any patch-welding on the frame, boom, or stick suggesting a hard life. Check the swing circle for play and cycle every hydraulic function through full travel, watching for slow or jerky movement that points to pump or valve wear. Start the engine cold if possible, watch startup smoke color and duration, listen for knock, and check for blow-by plus coolant-in-oil or oil-in-coolant cross-contamination. Inspect hoses, cylinder rods, and pins for leaks and wear, and confirm gauges, switches, cab A/C, and joystick response are smooth rather than notchy. Boom/stick length, undercarriage width, and counterweight vary across 320B configurations and change reach, lift capacity, and transport dimensions, so confirm the exact configuration against the machine's own identification plate rather than a generic spec sheet, and have your dealer verify hydraulic pressures and any recent repair history before final purchase.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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