Caterpillar 345B
Caterpillarexcavator

Caterpillar 345B

Maintenance schedule, common problems & OEM parts breakdown

The Caterpillar 345B is a 40-plus-tonne class crawler excavator, built from 1998 into the mid-2000s for mass excavation, quarry loading, and heavy production digging. It runs a 3176C ATAAC turbocharged, air-to-air aftercooled inline-six diesel; the standard-undercarriage 345B is rated around 216 kW (290 hp) net, while longer-undercarriage L configurations carry a higher rating near 239 kW (321 hp) net, or 257 kW (345 hp) gross. Operating weight runs from roughly 43 tonnes (94,800 lb) on the standard machine up to about 51 tonnes (113,000 lb) on the L mass-excavation undercarriage, and Cat offered both standard and long, wide-gauge undercarriages plus long-reach front options across the line. It replaced Caterpillar's original 345 excavator and was itself carried forward as the 345B Series II / 345B L Series II before the platform moved to ACERT power as the 345C / 345C L in 2005.

The B-series update brought the electronically controlled, HEUI-injected 3176C ATAAC engine to the 345 platform, a step up in output and fuel control from the earlier mechanically governed engine, and Cat paired the L undercarriage with a higher power rating to handle the extra counterweight and reach demanded by mass-excavation and quarry customers. The mid-run Series II update refined hydraulics and cab ergonomics before Cat retired the 3176C family in this class in favor of the C13 ACERT engine on the 345C. Today the 345B sits firmly in the used and parts-out market: it predates modern emissions aftertreatment, its HEUI fuel system and hydraulics are well understood by independent shops, and the 3176C shares engine parts with Cat truck and generator applications, which keeps engine components more available than the excavator's age would suggest.

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 345B specifications

Engine

Engine modelCat 3176C ATAAC diesel, turbocharged and aftercooled, inline-6 cylinder
Net power (SAE J1349)216 kW (290 hp)
Displacement10.3 L (628.6 cu in)
Emissions tierNot documented in available spec sheets for this model/serial range. Verify against the engine serial plate; the production run (1998-2007) spans an early nonroad emissions phase-in period.
Later-production noteMachines designated 345B Series II are reported with an uprated engine near 257 kW (345 hp). That is a distinct configuration and is not reflected in the figures on this sheet.

Weights

Operating weight, standard undercarriage43,000 kg (94,799 lb)
Operating weight, long/wide-undercarriage (345B L) variantapprox. 44,050 kg (97,114 lb)
Ground pressureNot documented in available spec sheets for this model.
Transport weightNot separately published; shipping weight tracks operating weight for this class of machine.

Dimensions

Transport length11.38-11.73 m (37.3-38.5 ft), varies with boom style (mass boom vs reach boom)
Transport width over tracks, standard3.34-3.35 m (10.96-11.00 ft)
Transport width over tracks, long/wide-undercarriage (345B L) variant3.49 m (11.46 ft)
Shipping height (boom in transport position)3.48-3.68 m (11.4-12.1 ft), varies with boom style
Height, top of cab3.18-3.20 m (10.44-10.50 ft)
Tail swing radius3.61-3.63 m (11.85-11.90 ft)
Track shoe width, standard600 mm (23.6-23.7 in)
Track shoe width, long/wide-undercarriage (345B L) variant750 mm (29.5 in)
Ground clearance0.51-0.52 m (1.68-1.70 ft)
Track length on ground, standard4.03-4.05 m (13.2-13.3 ft)
Track length on ground, long/wide-undercarriage (345B L) variant4.36 m (14.31 ft)
Track gauge2.74 m (8.99-9.00 ft)

Performance

Max digging depth6.68-8.28 m (21.9-27.2 ft), varies across the 5 factory boom/stick combinations
Max reach at ground level10.66-12.21 m (35.0-40.0 ft), varies by boom/stick combination
Max cutting height10.16-10.82 m (33.3-35.5 ft), varies by boom/stick combination
Max loading/dump height2.12-3.19 m (7.0-10.5 ft); the shortest-stick options give the highest dump height, the longest-reach stick the lowest
Max travel speed4.4-4.5 km/h (2.7-2.8 mph)
Drawbar pull322 kN (72,400 lbf)
Swing speedNot documented for this standard configuration in available spec sheets.
GradeabilityNot documented in available spec sheets for this model.

Forces

Bucket digging force (SAE)Not documented in available spec sheets for the standard-undercarriage 345B. Verify with your dealer or against the boom/stick/bucket configuration fitted to a specific machine.
Stick/arm digging force (SAE)Not documented in available spec sheets for the standard-undercarriage 345B; figures vary by stick length and boom style. Verify with your dealer for a specific configuration.

Service capacities (summary)

Fuel tank600 L (158.6 gal)
Hydraulic pump flow640 L/min (169.1 gal/min) combined pump flow
Hydraulic system relief pressure34,300 kPa (4,980 psi)
Hydraulic tank capacityNot documented in available spec sheets for this model.
Cooling system capacityNot confirmed for the standard-undercarriage 345B; a fluid guide ties approx. 73 L to the long-undercarriage 345B L variant only, not generalized here.
Engine oil capacityNot documented in available spec sheets for this model.

Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.

345B fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter)30 L (7.9 US gal)Cat DEO diesel engine oil (API CG-4/CH-4 duty oil) for the Cat 3176C ATAAC engine fitted to the 345B. Select viscosity by ambient temperature per the OMM chart: SAE 15W-40 for general temperate operation, SAE 10W-30 for cold starts in cooler climates, single-grade SAE 30 acceptable where ambient stays consistently warm.
Cooling system45 L (12 US gal) on the standard configuration; an early 345B L serial range is reported at 73 L (19 US gal) — capacity varies by configuration/series, confirm against the nameplate serial prefixCat ELC (Extended Life Coolant), premixed, rated for 6 years/6,000 hours between changes. Cat DEAC conventional coolant is the fallback where ELC is not used, with a shorter 3-year/3,000-hour service interval.
Fuel tank600 L (158.6 US gal) on the standard 345B/345B L; 720 L (190 US gal) on 345B L Series II/UHD configurations — varies by configuration/seriesDiesel fuel meeting the engine's fuel specification (No. 2-D grade for normal service, No. 1-D for cold-weather operation). Not a lubricant; capacity listed for reference only.
Hydraulic system total (including tank)520 L (137 US gal)Cat HYDO Advanced hydraulic oil, viscosity graded by ambient temperature — Cat HYDO Advanced 10 for temperate climates, a lower-viscosity Cat HYDO Advanced grade for cold climates, Cat HYDO Advanced 30 where ambient stays consistently hot. Follow the OMM temperature-viscosity chart to select grade.
Hydraulic tank210 L (55 US gal)Same fluid as hydraulic system total: Cat HYDO Advanced, viscosity selected by ambient-temperature chart.
Final drive (each)13-15 L (3.4-4.0 US gal), varies by serial prefix/configurationCat TDTO (Transmission/Drivetrain Oil), SAE 30 single-grade for standard service; Cat TDTO-TMS multigrade where the machine sees a wide ambient-temperature range or frequent cold starts.
Swing drive10-11 L (2.6-2.9 US gal), varies by serial prefix/configurationCat TDTO (Transmission/Drivetrain Oil), same grade selection as the final drives.
Grease (all lubrication points)Spec only — applied per point, no single system fill quantityCat Multipurpose Grease (Cat MPGM), NLGI 2 general-purpose lithium-complex grease, for standard pin and bushing points. Cat Advanced 3Moly Grease at high-load linkage joints (boom, stick, bucket) for added film strength.

Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.

Caterpillar 345B maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil level and top off before starting the 3176C ATAAC engine.
  • Check coolant level in the recovery bottle; look for leaks at hoses and the ATAAC aftercooler.
  • Drain water and sediment from the fuel/water separator.
  • Check hydraulic tank oil level with the boom lowered and cylinders retracted.
  • Walk down the boom, stick, bucket linkage, and undercarriage for leaks, loose fasteners, and cracks.
  • Grease boom, stick, and bucket pins daily on high-cycle work; grease the swing bearing and check track sag weekly.
Every 250 h
  • Change engine oil and the engine oil filter; pull an S.O.S sample first.
  • Replace the primary fuel filter and clean the water separator bowl.
  • Check alternator and fan belt tension and condition.
  • Service the engine air filter primary element per the service indicator; replace the secondary element only when required.
  • Check swing drive and final drive oil levels.
  • Torque-check track shoe bolts and inspect the swing bearing gear teeth.
Every 500 h
  • Change the hydraulic return-line filter element.
  • Pull S.O.S samples from hydraulic oil, swing drive, and final drive oil.
  • Inspect the turbocharger housing, boost lines, and clamps for leaks or play.
  • Grease bucket linkage bushings and pins thoroughly and check for excess play.
  • Inspect batteries, wiring harness connectors, and ground straps for corrosion.
Every 1,000 h
  • Change swing drive oil.
  • Change final drive oil in the track final drives.
  • Replace the hydraulic tank breather and case-drain filter.
  • Clean the radiator, engine oil cooler, and hydraulic oil cooler cores.
  • Check the track adjuster grease cylinder and measure sprocket, roller, idler, and chain wear.
  • Pull a coolant sample and check SCA/coolant conditioner concentration.
Every 2,000 h
  • Change hydraulic tank oil, or extend the interval only if S.O.S trending supports it.
  • Check and adjust valve lash and injector timing on the 3176C ATAAC engine.
  • Inspect the turbocharger for shaft play and wheel wear.
  • Inspect the main hydraulic pump and swing motor mounting and case drains for leakage.
  • Test alternator output and starter motor condition.
  • Inspect the crankshaft vibration damper and engine mounts.
Every 4,000 h
  • Change swing drive and final drive gear oil and resample.
  • Pressure-test the cooling system and inspect the water pump for seepage.
  • Measure boom, stick, and bucket pin and bushing bore wear; replace worn pins and bushings.
  • Replace the hydraulic pilot and case-drain filters as a set.
  • Have injectors and the high-pressure oil pump evaluated against S.O.S and performance trends.
Every 6,000 h
  • Change engine coolant and flush the cooling system.
  • Evaluate the main hydraulic pump and swing motor for rebuild based on flow-test and S.O.S results.
  • Inspect undercarriage components against wear-limit charts and plan chain, sprocket, roller, and idler replacement.
  • Torque-check structural fasteners on the boom, stick, counterweight, and upper and lower frame.
  • Schedule an engine inframe or top-end inspection based on oil consumption and blow-by trends.

Servicing the 345B beyond the schedule

Predictive Maintenance & Fluid Analysis

The 345B's 3176C ATAAC engine runs a HEUI fuel system, so routine S.O.S oil sampling on the engine catches injector and high-pressure oil pump wear before it turns into an unplanned teardown. Sample hydraulic oil, swing drive, and final drive oil on the same cycle to track pump, motor, and gear wear early. Watch coolant condition and SCA levels given the aftercooled engine's tighter thermal margins, and log sprocket, roller, and idler wear against a chart so undercarriage replacement gets planned, not reactive.

Corrective & Common Repairs

Common 345B failure points trace back to the 3176C ATAAC's HEUI injectors and high-pressure oil pump, which show up as hard starting, misfire, or power-loss fault codes as the machine ages. Expect turbocharger boost leaks at clamps and couplings, main control valve and swing motor seal leakage from decades of cycling, and worn boom, stick, and bucket pins and bushings that show up as linkage knock. On L-configuration undercarriages, the added counterweight accelerates chain and sprocket wear, and original wiring harnesses often need connector and ground repairs.

Overhaul & Rebuild Points

Plan an engine top-end or inframe rebuild on the 3176C ATAAC once oil consumption, blow-by, or S.O.S trends cross the limit, since this HEUI engine's injectors and high-pressure oil pump are the usual rebuild trigger. Main hydraulic pump and swing motor rebuilds follow flow-test and case-drain data rather than a fixed hour number. Final drive and swing drive gear sets need inspection at overhaul time, and boom, stick, and bucket pin bores often need weld-and-bore repair once linkage wear exceeds tolerance on a machine this age.

Seasonal & Environment Servicing

Cold climates call for correct-viscosity engine and hydraulic oil, a working coolant heater, and fresh anti-gel-treated fuel so the HEUI system's high-pressure oil circuit primes properly on startup. In hot or dusty quarry and mass-excavation settings, step up radiator, engine oil cooler, and hydraulic cooler core cleaning, and shorten the interval for track and linkage greasing since abrasive ground accelerates pin and bushing wear. Watch hydraulic and coolant temperatures closely on the heavier L-configuration undercarriage under sustained high-ambient loads.

345B fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
100-01Engine Oil Pressure - data valid but below normal rangeLow oil level, worn oil pump, plugged filter, or a failing oil pressure sensor/wiringCheck oil level and filter condition first, then confirm sensor signal with the diagnostic tool before replacing the pump
110-00Engine Coolant Temperature - data valid but above normal rangeLow coolant level, plugged radiator core, weak fan drive, or a failing thermostatCheck coolant level and clear debris from the radiator core, verify fan operation, then confirm the sensor reading against a manual gauge
190-08Engine Speed/Timing Sensor - abnormal frequency, pulse width, or periodDamaged or misaligned speed/timing sensor, debris on the sensor tip, or damaged harness wiringInspect sensor air gap and clean debris, check harness and connector for damage, reseat before replacing the sensor
164 (FMI varies by fault)Injector actuation pressure signal out of expected range on the HEUI fuel systemLow or contaminated engine oil feeding the HEUI pump, air in the actuation circuit, or a failing actuation pressure sensorCheck engine oil level and condition, bleed air from the actuation circuit, verify sensor wiring before replacing the sensor
168-02System/Battery Voltage - intermittent or erratic readingLoose or corroded battery connections, a failing alternator, or chafed wiring at the ECM harnessClean and tighten battery and ground connections, load-test the charging system, inspect the ECM harness for chafing
253-02Personality module/customer parameters incorrect or mismatchedECM parameter file mismatch after a control module swap, reflash, or software updateReload the correct engine parameter file with the electronic service tool and confirm engine and machine serial numbers match
1 through 6 (per-cylinder injector solenoid circuit)Individual cylinder injector solenoid circuit fault, open or shortDamaged injector harness wiring, a corroded connector, or a failed injector solenoid on that cylinderCheck harness and connector for that cylinder, swap injectors between cylinders to confirm, then replace the faulty injector
ERR 016Digital cab HVAC control panel fault, reported in service tied to the heater water valve circuitWater valve actuator fault or wiring issue in the heater circuit behind the cab side panelInspect the water valve and its wiring behind the storage tray/front panel before replacing the actuator

Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.

345B attachments & work tools

Buckets

General-purpose buckets for this size class typically run 1.6-2.8 m³ (2.1-3.7 yd³) across roughly 1220-1830 mm (48-72 in) widths. Heavy-duty/rock buckets trade width for a reinforced wear package at similar or slightly lower capacity per width, e.g. around 1370 mm (54 in) at roughly 2.3 m³. Buckets mount pin-on to the stick/linkage or through a quick coupler. Bucket and link-pin diameters in this class run roughly 80-100 mm; confirm exact pin/bushing sizes against your stick linkage and coupler before ordering, since they vary by linkage type.

Hydraulic hammers

This excavator sits in the roughly 40-50 t carrier class that Cat matches to its H160-size Performance hammer: about 160 mm tool diameter, roughly 11,500 J impact energy, 400-505 blows/min, and a service weight near 3.1-3.5 t (6,900-7,700 lb). Cat literature ties this hammer class specifically to the 345B II and similarly sized carriers. A step-up H180-class breaker is cataloged for the same general weight bracket on other 345-family excavators. Match hammer weight class to the actual counterweight/stick configuration and check the carrier's flow/pressure chart before selecting a breaker.

Quick couplers

A hydraulic pin-grabber coupler is the common quick-attach system for this class: cab-switch actuated, mounted on the stick, letting the machine share buckets and other work tools with similarly sized excavators without leaving the seat. Pin-grabber couplers sized for roughly 80-100 mm pins fit this class. A coupler adds a small pin-center offset versus a pin-on bucket, which slightly reduces bucket digging force.

Thumbs/grapples

Hydraulic thumbs are cataloged across a size range that spans this excavator, in pin-on or pin-grabber mount, typically 3- to 4-tooth, with a main pivot pin near 110 mm. Rigid stiff-link (mechanical, non-hydraulic) thumbs are also available for this class. Grapples, such as an orange-peel/timber grapple, run off the machine's auxiliary open/close circuit and are set up to work with the other implement circuits for smooth simultaneous multi-function control; both thumbs and grapples need the auxiliary hydraulic valve fitted.

Rippers

Single-shank rippers are cataloged for this excavator class for breaking up hardpan or rippable rock ahead of a bucket pass, used as an alternative to a hammer when the material only needs to be loosened, not fully fragmented. It mounts pin-on in place of the bucket rather than as a dozer-style rear ripper.

Hydraulic kit / circuit notes

Cat's auxiliary-hydraulic systems-operation documentation for this platform covers this excavator together with its smaller B-series siblings and the later 345B Series II, confirming the base machine supports a factory or dealer-fit auxiliary work-tool circuit. Medium-pressure plumbing suits hammers and couplers; grapples, shears, and thumbs generally need the higher-flow open/close circuit. The later 345B Series II added a standard auxiliary valve with up to four programmable flow/pressure presets for matching tools; on the base 345B, verify whether the auxiliary circuit and flow presets are already fitted or need dealer installation before ordering a work tool.

All 345B assemblies by section

Every catalogued assembly group for the Caterpillar 345B. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Air Inlet And Exhaust System
1241699 Air Cleaner Gp
1273288 Elbow Gp-Air Inlet
1318849 Extension Gp-Exhaust
13***49Extension Group-Exhaust; (Exhaust)1
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1477021 Lines Gp-Air
14***21Lines Group-Air; -Aftercooler To Turbocharger1
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1260081 Lines Gp-Air
12***81Lines Group-Air; -Turbocharger Outlet1
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1241682 Lines Gp-Air
12***82Lines Group-Air; -Air Cleaner To Turbocharger1
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1241687 Lines Gp-Air
1318931 Lines Gp-Air
13***31Lines Group-Hydraulic Tank Air Press; (Hydraulic Tank Air Press)1
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1241685 Lines Gp-Drain
1172688 Manifold Gp-Exhaust
11***88Manifold Group-Exhaust; (Exhaust)1
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1165405 Manifold Gp-Inlet
1241683 Mounting Gp-Air Cleaner
12***83Mounting Group-Air Cleaner; (Air Cleaner)1
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1241680 Muffler Gp
1292879 Turbocharger Gp
1355392 Turbocharger Gp
Basic Engine
1159382 Camshaft Gp
1323215 Cover Gp-Air Compressor
13***15Cover Group-Air Compressor; (Air Compressor)1
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1152985 Cover Gp-Cylinder Block
1275728 Cover Gp-Flywheel Housing
12***28Cover Group-Flywheel Housing; (Flywheel Housing)1
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1364307 Cover Gp-Front Housing
13***07Cover Group-Front Housing; -Hydraulic Pump Drive1
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1172743 Crankshaft Gp
1280407 Cylinder Block As
1152982 Cylinder Block Gp
1323251 Cylinder Head As
1161085 Cylinder Head Gp
1323245 Cylinder Head Gp
1172766 Damper Gp
1373750 Drive Gp-Fan
1161083 Fastener Gp-Cylinder Head
11***83Fastener Group-Cylinder Head; (Cylinder Head)1
12***84Bolt; (Hex Head) (M16x2x160mm)26
2S***58Washer-Hard; (17x29x3-mm Thk)(Engine Brake)26
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1172771 Fastener Gp-Damper
1172794 Fastener Gp-Flywheel
11***94Fastener Group-Flywheel; (Flywheel)1
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1280392 Flywheel Gp
1172750 Gear Gp-Front
1381989 Housing Gp-Flywheel
13***89Housing Group-Flywheel; (Flywheel)1
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1153006 Housing Gp-Front
1159386 Lifter Gp-Valve
1172748 Lifting Gp-Engine
1241684 Mounting Gp-Engine
12***84Mounting Group-Engine; (Engine)1
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1382550 Mounting Gp-Fan Drive
13***50Mounting Group-Fan Drive; (Short)1
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1416156 Mounting Gp-Refrigerant Compr
14***56Mounting Group-Refrigerant Compr; (Refrigerant Compr)1
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1165408 Mounting Gp-Valve Mechanism
1316678 Pan Gp-Oil
1165371 Piston & Rod Gp
1170165 Plug Gp-Cylinder Block
11***65Plug Group-Cylinder Block; -Oil Gallery, End1
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1170185 Plug Gp-Cylinder Block
11***85Plug Group-Cylinder Block; (Cylinder Block)1
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1152984 Plug Gp-Cylinder Block
11***84Plug Group-Cylinder Block; (Cylinder Block)1
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1165452 Plug Gp-Front Housing
11***52Plug Group-Front Housing; (Front Housing)1
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1477174 Pulley Gp
1172795 Pulley Gp-Crankshaft
11***95Pulley Group-Crankshaft; (Crankshaft)1
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1416158 Pulley Gp-Ref Compressor & Alt
14***58Pulley Group-Ref Compressor & Alt; (Ref Compressor & Alt)1
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1159397 Rocker Arm Gp
1161091 Seal Gp-Crankshaft
11***91Seal Group-Crankshaft; -Single Lip1
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1323240 Support Gp-Engine
1172749 Valve Mechanism Gp
Cooling System
1152990 Cooler Gp-Engine Oil
11***90Cooler Group-Engine Oil; (Engine Oil)1
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1277531 Cooling Ar
12***31Cooling Ar1
12***64Hood & Guard Group1
14***73Lines Group-Return & Filter; (Return & Filter)1
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1172792 Fastener Gp-Oil Cooler
11***92Fastener Group-Oil Cooler; -Engine1
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1751415 Housing & Regulator Gp
1752564 Lines Gp-Water
1172778 Lines Gp-Water
11***78Lines Group-Water; -Water Pump Inlet Elbow1
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1165460 Lines Gp-Water
1172789 Plug Gp-Water Lines
11***89Plug Group-Water Lines; -Engine Oil Cooler1
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1172674 Pump Gp-Water
1006944 Pump Gp-Water
1241674 Radiator & Fan Gp-Part 2 Of 2
1241674 Radiator & Fan Gp-Part 1 Of 2
1477012 Radiator & Fan Gp-Part 2 Of 2
1477012 Radiator & Fan Gp-Part 1 Of 2
1489106 Radiator & Hyd Oil Cooler Gp
14***06Radiator & Hydraulic Oil Cooler Group; -High Ambient1
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1398822 Radiator & Hyd Oil Cooler Gp
12***75Radiator & Hydraulic Oil Cooler Group1
13***22Radiator & Hydraulic Oil Cooler Group1
14***60Radiator & Hydraulic Oil Cooler Group1
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1516500 Radiator & Hyd Oil Cooler Gp
14***13Radiator & Hydraulic Oil Cooler Group1
14***06Radiator & Hydraulic Oil Cooler Group; -High Ambient1
15***00Radiator & Hydraulic Oil Cooler Group1
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1241675 Radiator & Hyd Oil Cooler Gp
12***75Radiator & Hydraulic Oil Cooler Group1
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1477013 Radiator & Hyd Oil Cooler Gp
14***13Radiator & Hydraulic Oil Cooler Group1
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Electrical And Starting System
3e7738 Alarm As-Backup
1288915 Alarm Gp-Travel
1416157 Alternator Gp-Charging
14***57Alternator Group-Charging; (Charging)1
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3e7577 Alternator Gp-Charging
1495072 Battery & Wiring Gp-Part 1 Of 3
1495072 Battery & Wiring Gp-Part 2 Of 3
1495072 Battery & Wiring Gp-Part 3 Of 3
1254856 Battery & Wiring Gp-Cold Weath
12***56Battery & Wiring Group; -Cold Weather1
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1160242 Cable As
1254727 Cable As
1288884 Cable As
1288898 Cable As
1160080 Cable As
1242674 Connection Gp-Electrical
12***74Connection Group-Electrical; -Ground1
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1262973 Control & Mtg Gp-Engine Elek
12***73Control & Mtg Group-Engine Elek; (Engine Elek)1
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1262972 Control & Mtg Gp-Electronic
1153055 Control Gp-Engine Electronic
11***55Control Group-Engine Electronic; (Engine Electronic)1
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1457805 Control Gp-Engine Electronic
14***05Control Group-Engine Electronic1
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1507021 Converter Gp-Electrical
1254868 Harness As
1507024 Harness As
1507023 Harness As
1673537 Harness As-Part 1 Of 3
1507022 Harness As
15***22Harness As1
15***23Harness As1
15***24Harness As1
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1673538 Harness As-Part 3 Of 3
1160243 Harness As
1673537 Harness As-Part 2 Of 3
1706859 Harness As
1673538 Harness As-Part 2 Of 3
1673591 Harness As
1506961 Harness As
1288900 Harness As
1673476 Harness As
1254848 Harness As
1673538 Harness As-Part 1 Of 3
1673537 Harness As-Part 3of 3
1400918 Harness As
1673536 Harness As-Console
1673535 Harness As-Console-Part 1 Of 2
1673535 Harness As-Console-Part 2 Of 2
1172763 Harness As-Engine
10***00Kit-Connecting Plug; (12-Pin)(Electronic Control)1
10***02Kit-Receptacle; (2-Pin)(Engine Sensor Wiring Harness)1
10***03Kit; (Receptacle) (3-Pin) (Includes Receptacle As & Wedge)4
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1673526 Harness As-Wiring
16***26Harness As-Wiring1
16***30Harness As-Wiring; (Wiring)1
16***31Harness As-Wiring; (Wiring)1
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1673530 Harness As-Wiring
1673534 Harness As-Wiring
1673531 Harness As-Wiring
1673532 Harness As-Wiring
16***32Harness As-Wiring1
16***33Harness As-Wiring; (Wiring)1
16***34Harness As-Wiring; (Wiring)1
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1673533 Harness As-Wiring
1532522 Lamp Gp-Flood
1532521 Lamp Gp-Flood
15***21Lamp Group-Flood; -Chassis, Boom-Boom, Rear1
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1532523 Lamp Gp-Flood
15***23Lamp Group-Flood; -Horizontal Rh1
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1114813 Lamp Gp-Flood
1254846 Lighting Gp-Boom
1114694 Lighting Gp-Cab
4i5409 Lighting Gp-Chassis
4I***09Lighting Group-Chassis; -Front, Rh1
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1210984 Lighting Gp-Cab
1495075 Panel Gp-Circuit Breaker-Part 2 Of 2
1495075 Panel Gp-Circuit Breaker-Part 1 Of 2
1172785 Sensor Gp-Elek
1296628 Sensor Gp-Speed
12***28Sensor Group-Speed; -Engine Speed/Timing1
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1507030 Speaker Gp-Radio
1241690 Starting Aid Gp-Ether
1054729 Tarting Motor Gp-Electric
10***29Starting Motor Group-Electric; -Cold Weather1
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6v0890 Starting Motor Gp-Electric
6V***90Starting Motor Group-Electric; (Delco Remy)1
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1160097 Switch As
1114799 Switch As
11***99Switch As; (Hydraulic Lockout, Neutral Start)1
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1160095 Switch As
5c6108 Switch As
5C***08Switch As; (Fuel Tank Shut Off)1
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7n0718 Switch As-Disconnect
7N***18Switch As-Disconnect; -Battery-Ground Level1
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1752313 Switch As-Magnetic
1752314 Switch As-Magnetic
1296466 Switch As-Roller
1107884 Switch As-Toggle
11***84Switch As-Toggle; (Momentary)(Manual Engine Speed Control)1
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1140421 Switch As-Toggle
11***21Switch As-Toggle; (Counterweight Removal)1
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7n0719 Switch As-Disconnect
7N***19Switch Group-Disconnect; -Battery1
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1251302 Switch As-Magnetic
12***02Switch Group-Magnetic; -Starting Motor, Start Relay1
17***13Switch As-Magnetic; (Magnetic)1
17***14Switch As-Magnetic; (Magnetic)1
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1060107 Switch As-Rotary
10***07Switch Group-Rotary; -Autodig Material Select-Throttle Position1
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9g7641 Switch Gp-Start
9G***41Switch Group-Start; -Engine, Key-Vims Service1
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1114870 Timer As
1321827 Wire As
1431633 Wiring Gp-Cab
1495078 Wiring Gp-Console
1495079 Wiring Gp-Console
14***79Wiring Group-Console; (Console)1
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1495077 Wiring Gp-Console
14***77Wiring Group-Console1
14***78Wiring Group-Console; -Lh1
14***79Wiring Group-Console; (Console)1
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1172759 Wiring Gp-Engine Electronic
11***59Wiring Group-Electronic Control; (Electronic Control)1
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1431634 Wiring Gp-Lower Wiper
1507025 Wiring Gp-Radio
1506960 Wiring Gp-Refueling Pump
15***60Wiring Group-Refueling Pump; (Refueling Pump)1
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1172760 Wiring Gp-Unit Injector
Engine Arrangement
1241679 Engine Ar
12***79Engine Ar1
12***80Muffler Group1
14***05Engine Ar-Complete; (Complete)1
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1422005 Engine Ar-Complete-Part 1 Of 3
11***84Plug Group-Cylinder Block; (Cylinder Block)1
11***85Cover Group-Cylinder Block1
11***08Mounting Group-Valve Mechanism1
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1422005 Engine Ar-Complete-Part 3 Of 3
10***29Starting Motor Group-Electric; -Cold Weather1
11***03Lines Group-Fuel Injection; (Fuel Injection)1
11***28Pump & Mtg Group-Fuel Transfer; (Fuel Transfer)1
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1422005 Engine Ar-Complete-Part 2 Of 3
11***90Cooler Group-Engine Oil; (Engine Oil)1
11***91Seal Group-Crankshaft; -Single Lip1
11***60Lines Group-Water; -Bypass1
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1260052 Engine Ar-Core-Part 2 Of 2
11***05Manifold Group-Inlet1
11***56Pump Group-Fuel Injection; (Fuel Injection)6
11***59Wiring Group-Electronic Control; (Electronic Control)1
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1260052 Engine Ar-Core-Part 1 Of 2
11***82Cylinder Block Group1
11***06Housing Group-Front; (Front)1
11***82Camshaft Group1
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1516644 Installation Ar-Engine
12***82Lines Group-Air; -Air Cleaner To Turbocharger1
12***83Mounting Group-Air Cleaner; (Air Cleaner)1
12***84Mounting Group-Engine; (Engine)1
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Frame And Body
1401590 Box & Mounting Gp
1507383 Box & Mtg Gp-Storage
15***83Box & Mtg Group-Storage; (Storage)1
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1266330 Box & Mtg Gp-Storage
1266362 Box Gp-Storage
1464962 Box Gp-Storage
1507384 Box Gp-Storage
1266328 Counterweight Gp
1334410 Counterweight Gp
1775991 Cover Gp
1334543 Cover Gp-Hood
1334430 Cover Gp
1416493 Door Gp-Hood
14***93Door Group-Access; -Battery Compartment1
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1507392 Door Gp-Hood
15***92Door Group-Access; -Battery Compartment1
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1416496 Door Gp-Hood
1401573 Door Gp-Hood
14***73Door Group-Access; -Pump Compartment1
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1464966 Fender & Cover Gp
1271388 Frame Gp-Undercarriage
1271387 Frame Gp-Undercarriage
1372920 Frame Gp-Upper
1141387 Gear & Bearing Gp-Part 1 Of 2
1362969 Gear & Bearing Gp
11***83Seal (1100 cm) (Order By The Centimeter)0
11***71Gear & Bearing Group-Swing; (94-Bearing)1
13***69Gear & Bearing Group-Swing1
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1141387 Gear & Bearing Gp-Part 2 Of 2
1277523 Guard Ar-Bottom
12***24Guard Group-Bottom; (Bottom)1
12***23Guard Ar-Bottom1
13***77Guard Group-Swivel; (Swivel)1
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1266324 Guard Gp-Bottom
1266322 Guard Gp-Bottom
1304277 Guard Gp-Swivel
1531591 Guard Gp-Track Guide
15***91Guard Group-Track Guide; -Full Length1
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1531588 Guard Gp-Track Guide
15***88Guard Group-Track Guide; -Center1
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1531592 Guard Gp-Track Guide
1271370 Guard Gp-Travel Motor
1334446 Handhold Gp
1223877 Handle Gp-Storage Door
1334445 Handhold Gp
1334361 Hood & Guard Gp
1416475 Hood & Guard Gp-Part 3 Of 3
1416475 Hood & Guard Gp-Part 1 Of 3
1416475 Hood & Guard Gp-Part 2 Of 3
1416516 Hood & Guard Gp
13***61Hood & Guard Group0
14***75Hood & Guard Group1
14***16Hood & Guard Group1
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1775989 Hood & Guard Gp
1277664 Hood & Guard Gp
1416488 Hood As-Engine
1334585 Hood As
1156363 Idler Gp-Front
1156364 Idler Gp-Front
1156366 Idler Gp-Front
1504780 Link As-Track
15***48Link; (Track) (Rh)49
15***49Link; (Track) (Lh)49
15***80Link As-Track; (Track)1
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1504745 Link As-Track
15***45Link As-Track; Link As.-Track1
15***48Link; (Track) (Rh)52
15***49Link; (Track) (Lh)52
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1439565 Pump Gp-Lubrication
14***65Pump Group-Lubrication; (Lubrication)1
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1362459 Roller Ar-Track & Carrier
1362458 Roller Ar-Track & Carrier
1247280 Roller Gp-Track Carrier
12***80Roller Group-Track Carrier; (Track Carrier)1
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1792395 Roller Gp-Track-Double Flange
17***95Roller Group-Track-Double Flange1
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1787293 Roller Gp-Track-Single Flange
17***93Roller Group-Track-Single Flange; (Track) (Single Flange)1
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1416446 Seal Gp
1156365 Spring Gp-Recoil
1531670 Step Gp
7y1635 Adjustment Gp-Hydraulic Track
7Y***35Track Adjuster & Recoil Group; (Lh)1
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1504761 Track Gp
15***41Bolt; (Track) (M24x1.5x67mm)196
15***42Nut-Track; (M24x1.5-Thd)196
15***61Track Group1
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1504754 Track Gp
15***41Bolt; (Track) (M24x1.5x67mm)208
15***42Nut-Track; (M24x1.5-Thd)208
15***45Link As-Track; Link As.-Track1
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1504756 Track Gp
15***41Bolt; (Track) (M24x1.5x67mm)208
15***42Nut-Track; (M24x1.5-Thd)208
15***45Link As-Track; Link As.-Track1
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1504757 Track Gp
15***41Bolt; (Track) (M24x1.5x67mm)208
15***42Nut-Track; (M24x1.5-Thd)208
15***45Link As-Track; Link As.-Track1
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1277551 Track Gp
12***51Track Group1
15***54Track Group; -2-Required1
15***70Step Group1
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1504760 Track Gp
15***41Bolt; (Track) (M24x1.5x67mm)196
15***42Nut-Track; (M24x1.5-Thd)196
15***60Track Group1
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1504762 Track Gp
15***41Bolt; (Track) (M24x1.5x67mm)196
15***42Nut-Track; (M24x1.5-Thd)196
15***62Track Group1
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1504758 Track Gp
15***41Bolt; (Track) (M24x1.5x67mm)196
15***42Nut-Track; (M24x1.5-Thd)196
15***58Track Group1
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Fuel System
1165436 Filter Gp-Fuel
1335671 Filter Gp-Fuel
13***71Filter Group-Water Sep & Fuel; -Primary1
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1230783 Fitting Gp-Fuel Lines
12***83Fitting Group-Fuel Lines; -Fuel1
3J***07Seal Valve Assembly To; Seal- Tube Assembly To Logic Valve1
6V***52Cap-Dust; (Fuel Supply Tee Connection)1
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1170184 Fitting Gp-Fuel Return
11***84Fitting Group-Fuel Return; (Return)(Return)1
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1170183 Fitting Gp-Fuel Supply
11***83Fitting Group-Fuel Supply; (Supply)(Supply)1
3K***60Seal Pilot Manifold On; Seal To Boom Check Valve Drain1
9X***50Connector-O-Ring; (O-Ring Port)1
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1401524 Lines Gp-Fuel
1165403 Lines Gp-Fuel Injection
11***03Lines Group-Fuel Injection; (Fuel Injection)1
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1165428 Pump & Mtg Gp-Fuel Transfer
11***28Pump & Mtg Group-Fuel Transfer; (Fuel Transfer)1
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1277528 Pump Ar-Fuel Transfer
12***28Pump Ar-Refueling1
12***64Pump Group-Refueling; (Fuel Transfer)1
15***60Wiring Group-Refueling Pump; (Refueling Pump)1
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1172756 Pump Gp-Fuel Injection
11***56Pump Group-Fuel Injection; (Fuel Injection)1
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1165438 Pump Gp-Fuel Priming
11***38Pump Group-Fuel Priming; (Fuel Priming)1
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1277764 Pump Gp-Fuel Transfer
12***64Pump Group-Refueling; (Fuel Transfer)1
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1120665 Tank & Mtg Gp-Fuel
1120666 Tank Gp-Fuel
Hydraulic System
0874454 Accumulator Gp
08***54Accumulator Group-Hydraulic; -Charged-Pilot Oil1
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4i1536 Accumulator Gp
4I***36Accumulator Group-Hydraulic; -Charged-Pilot Oil1
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0874456 Accumulator Gp
08***56Accumulator Group-Hydraulic; -Charged-Pilot Oil1
4I***36Accumulator Group-Hydraulic; -Charged-Pilot Oil1
5I***16Accumulator Group-Hydraulic; -Charged-Pilot Oil1
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5i8416 Accumulator Gp
5I***16Accumulator Group-Hydraulic; -Charged-Pilot Oil1
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1298053 Block Gp-Hydraulic
12***53Base Group-Oil Filter; -Hydraulic1
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1358852 Brake As
1276684 Control Ar-Auxiliary
11***28Control Group-Hydraulic Pedal; -Auxiliary1
12***95Plate & Film Group1
12***84Control Ar-Auxiliary; -System 1, 1-Way, 1-Pump1
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1276773 Control Ar-Auxiliary
10***31Control Group-Auxiliary Pedal; -Auxiliary1
12***73Control Ar-Auxiliary; -1-Pump/2-Pump, 1-Way/2-Way Flw1
12***57Lines Group-Pilot; (Pilot)1
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1276685 Control Ar-Auxiliary
11***28Control Group-Hydraulic Pedal; -Auxiliary1
12***95Plate & Film Group1
12***85Control Ar-Auxiliary; -1-Pump/2-Pump, 1-Way/2-Way Flw1
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1096031 Control Gp-Hydraulic
10***31Control Group-Auxiliary Pedal; -Auxiliary1
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1540569 Control Gp-Pilot Operated Hyd
1337899 Control Gp-Pilot Operated Hyd
13***99Control Group-Handle; -Lh Joystick1
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1337900 Control Gp-Pilot Operated Hyd
13***00Control Group-Handle; -Rh Joystick1
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1352272 Control Gp-Hydraulic
13***72Control Group-Hydraulic Pedal; -Third Pedal1
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1116428 Control Gp-Hydraulic
11***28Control Group-Hydraulic Pedal; -Auxiliary1
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1764986 Valve Gp-Pilot
17***86Control Group-Joystick; -Lh-Stick & Swing1
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1764985 Valve Gp-Pilot
17***85Control Group-Joystick; -Rh-Boom & Work Tool1
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1287443 Lines Gp-Pilot
12***43Control Group-Pilot Operated Hydraulic; -Joystick, Pedals1
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1116284 Control Gp-Pilot Operated Hyd
11***84Control Group-Pilot Operated Hydraulic1
15***68Control Group-Travel1
15***69Control Group-Handle1
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1241678 Coupling Gp-Pump
1211376 Cover Gp-Pump Control
1297827 Cylinder & Lines Gp-Boom
12***83Lines Group-Boom Cylinder; -Rh1
12***27Cylinder & Lines Group-Boom; -Rh1
12***28Cylinder & Seal Group-Boom; (Boom)1
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1297826 Cylinder & Lines Gp-Boom
12***82Lines Group-Boom Cylinder; -Lh1
12***26Cylinder & Lines Group-Boom; -Lh1
12***28Cylinder & Seal Group-Boom; (Boom)1
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1297833 Cylinder & Lines Gp-Bucket
12***74Lines Group-Bucket Cylinder; (Bucket Cylinder)1
12***33Cylinder & Lines Group-Bucket; (Bucket)1
12***34Cylinder & Seal Group-Bucket; (Bucket)1
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1163436 Cylinder & Lines Gp-Bucket
11***94Lines Group-Bucket Cylinder; (Bucket Cylinder)1
11***36Cylinder & Lines Group-Bucket; (Bucket)1
11***34Cylinder & Seal Group-Bucket; (Bucket)1
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1297830 Cylinder & Lines Gp-Stick
12***73Lines Group-Stick Cylinder; (Stick Cylinder)1
12***30Cylinder & Lines Group-Stick; (Stick)1
12***31Cylinder & Seal Group-Stick; (Stick)1
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1297828 Cylinder & Seal Gp-Boom
12***28Cylinder & Seal Group-Boom; (Boom)1
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1183934 Cylinder & Seal Gp-Bucket
11***34Cylinder & Seal Group-Bucket; (Bucket)1
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1297834 Cylinder & Seal Gp-Bucket
12***34Cylinder & Seal Group-Bucket; (Bucket)1
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1297831 Cylinder & Seal Gp-Stick
12***31Cylinder & Seal Group-Stick; (Stick)1
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1297829 Cylinder Gp-Boom
1183935 Cylinder Gp-Bucket
1297835 Cylinder Gp-Bucket
1297832 Cylinder Gp-Stick
1297998 Drive Gp-Pump
1297999 Drive Gp-Accessory
1141415 Drive Gp-Swing
1141409 Drive Gp-Swing
1484596 Drive Gp-Swing
1141408 Drive Gp-Swing
1843995 Filter Ar
18***95Filter Group-Oil; -Hydraulic1
18***42Filter Group-Oil; -Hydraulic Return1
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1262080 Filter Gp-Hydraulic
1843930 Filter Gp-Hydraulic
18***30Filter Group-Oil; -Hydraulic, Pilot Supply1
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1884142 Filter Gp-Hydraulic
18***42Filter Group-Oil; -Hydraulic Return1
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1262075 Filter Gp-Hydraulic
12***75Filter Group-Oil; -Hyraulic Oil-Hydraulic, Case Drain1
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1262112 Filter Gp-Hydraulic
12***12Filter Group-Oil; -Hydraulic Return1
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1373815 Head Gp-Pump Control
1163653 Housing Gp-Filter
1438037 Indicator As
1282133 Knob As
1282132 Knob As
1353910 Lines Gp-Auxiliary Hydraulic
13***10Lines Group-Auxiliary Hydraulic; -Stick, High Pressure1
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1461441 Lines Gp-Auxiliary Hydraulic
14***41Lines Group-Auxiliary Hydraulic1
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1276690 Lines Gp-Auxiliary Hydraulic
12***90Lines Group-Auxiliary Hydraulic; -Stick, High Pressure1
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1241315 Lines Gp-Boom
1241316 Lines Gp-Boom
1240983 Lines Gp-Boom Cylinder
1240982 Lines Gp-Boom Cylinder
1295974 Lines Gp-Bucket Cylinder
12***74Lines Group-Bucket Cylinder; (Bucket Cylinder)1
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1158694 Lines Gp-Bucket Cylinder
11***94Lines Group-Bucket Cylinder; (Bucket Cylinder)1
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1434179 Lines Gp-Front-Part 2 Of 2
1287440 Lines Gp-Front-Part 2 Of 2
1434259 Lines Gp-Front-Part 1 Of 2
1434179 Lines Gp-Front-Part 1 Of 2
1434259 Lines Gp-Front-Part 2 Of 2
1287440 Lines Gp-Front-Part 1 Of 2
1287433 Lines Gp-Hydraulic Oil Cooler-Part 1 Of 2
1287433 Lines Gp-Hydraulic Oil Cooler-Part 2 Of 2
1287455 Lines Gp-Pilot
1287457 Lines Gp-Pilot
1689399 Lines Gp-Pilot-Part 2 Of 2
1689399 Lines Gp-Pilot-Part 1 Of 2
1287458 Lines Gp-Pilot
1287459 Lines Gp-Pilot
12***59Lines Group-Pilot; -Third Pedal1
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1287452 Lines Gp-Pilot
1515448 Lines Gp-Fan Drive Pump Pilot
15***48Lines Group-Pilot; (Fan Drive Pump Pilot)1
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1287434 Lines Gp-Fan Drive Pump Pilot
1287442 Lines Gp-Pump-Part 1 Of 2
1287442 Lines Gp-Pump-Part 2 Of 2
1434179 Lines Gp-Return & Filter
1434273 Lines Gp-Return & Filter
14***73Lines Group-Return & Filter; (Return & Filter)1
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1287449 Lines Gp-Stick
12***49Lines Group-Stick; -Bucket Cylinder1
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1287446 Lines Gp-Stick
1287447 Lines Gp-Stick
12***47Lines Group-Stick; -Bucket Cylinder1
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1287448 Lines Gp-Stick
12***48Lines Group-Stick; -Bucket Cylinder1
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1287445 Lines Gp-Stick
12***45Lines Group-Stick; -Bucket Cylinder1
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1295973 Lines Gp-Stick Cylinder
12***73Lines Group-Stick Cylinder; (Stick Cylinder)1
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1287439 Lines Gp-Swing Motor
1287437 Lines Gp-Travel Motor
1287436 Lines Gp-Travel Motor
1261915 Motor & Mtg Gp-Swing
1261916 Motor & Mtg Gp-Swing
1373790 Motor & Mtg Gp-Travel
1559107 Motor Gp-Fan Drive
15***07Motor Group-Piston; -Hydraulic Fan1
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1475789 Motor Gp-Swing
1373717 Motor Gp-Swing-Part 2 Of 2
1373717 Motor Gp-Swing-Part 1 Of 2
1231998 Motor Gp-Swing
1373791 Motor & Mtg Gp-Travel
1287435 Mounting Gp-Valve
12***35Mounting Group-Main Control Valve1
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1282153 Pedal Ar-Third
12***50Film-Instruction; (Travel Controls)1
12***53Pedal Ar-Third1
12***59Lines Group-Pilot; -Third Pedal1
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1227768 Plug Gp
1318848 Pump & Mtg Gp-Fan
1241677 Pump & Mounting Gp
12***77Pump & Mtg Group-Main Hydraulic1
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1262147 Pump Gp-Gear
1336912 Pump Gp-Gear
12***47Pump Group-Gear; (Gear)1
13***98Pump Group-Gear; (Gear)1
13***12Pump Group-Gear1
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1336907 Pump Gp-Gear
1336898 Pump Gp-Gear
1843955 Pump Gp-Hydraulic
1231993 Pump Gp-Piston
1559128 Pump Gp-Hydraulic
15***28Pump Group-Piston; (Hydraulic Fan)1
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1559248 Pump Gp-Piston
1262045 Rotating Gp-Motor
12***45Rotating Group-Motor; -Travel Motor1
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1843957 Rotating Gp-Pump
1559135 Rotating Gp-Pump
15***35Rotating Group-Pump; -Hydraulic Fan Pump1
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1425520 Rotating Gp-Pump
1559111 Rotating Gp-Motor
15***11Rotating Group-Pump; -Hydraulic Fan1
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1843956 Rotating Gp-Pump
4i6263 Rotor Gp-Swivel
1262113 Screen Gp
1589119 Swivel Gp
1346833 Tank & Filter Gp-Hydraulic-Part 2 Of 2
1262111 Tank & Filter Gp-Hydraulic-Part 2 Of 2
1262111 Tank & Filter Gp-Hydraulic-Part 1 Of 2
1346833 Tank & Filter Gp-Hydraulic-Part 1 Of 2
1262110 Tank & Mtg Gp-Hydraulic
1346832 Tank & Mtg Gp-Hydraulic
1401455 Valve Ar-4 Way
12***01Film Group1
12***52Lines Group-Pilot; (Pilot)1
14***55Valve Ar1
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4i6363 Valve As-Ball
4I***63Valve As-Ball; (1-Pump/2-Pump Flow)1
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1227690 Valve Gp-Check
1232513 Valve Gp-Check
1400685 Valve Gp-Check
1850384 Valve Gp-Check
18***84Valve Group-Check; -Slow Return1
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1227761 Valve Gp-Control-Part 2 Of 2
1227761 Valve Gp-Control-Part 1 Of 2
1227764 Valve Gp-Control
1227762 Valve Gp-Control-Part 2 Of 2
1227762 Valve Gp-Control-Part 1 Of 2
1659586 Valve Gp-Control
4i7836 Valve Gp-Flow Control
4I***36Valve Group-Flow Control; -Pilot Oil-Drain, Boom Ii1
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1535233 Valve Gp-Pilot
15***33Valve Group-Load Control; -Boom Down-Stick I1
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1227760 Valve Gp-Main Control
1659580 Valve Gp-Manifold & Reducing
16***80Valve Group-Manifold & Reducing1
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1371594 Valve As-Ball
13***94Valve Group-Manual1
13***43Valve Group-Manual1
13***44Valve Group-Manual1
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1384243 Valve As-Ball
1384244 Valve As
1764984 Valve Gp-Pilot
17***84Valve Group-Pilot; -Joystick-Implement, Swing1
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1232604 Valve Gp-Pilot
12***04Valve Group-Pilot; -Third Pedal, Straight Travel1
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1843899 Valve Gp-Pilot
0856455 Valve Gp-Pilot
08***55Valve Group-Pilot; -Control Pattern Change1
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1843900 Valve Gp-Pilot
1195219 Valve Gp-Pilot
11***19Valve Group-Pilot; -1-Pump, 2-Pump, Boom Priority1
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1232148 Valve Gp-Pilot
12***48Valve Group-Pilot; -Platform Travel1
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7i0034 Valve Gp-Press & Flow Cmpnstr
7I***34Valve Group-Press & Flow Cmpnstr1
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1227708 Valve Gp-Pressure Control
12***08Valve Group-Pressure Control; -Boom Ii, Swing1
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1373816 Head Gp-Pump Control
1373817 Head Gp-Pump Control
1400672 Valve Gp
1559238 Valve Gp-Relief
6e5234 Valve Gp-Relief
6E***34Valve Group-Relief; (Auxiliary Over-Load)1
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1227756 Valve Gp-Relief
12***56Valve Group-Relief; -Negative Flow Control1
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1772708 Valve Gp-Relief
1559237 Valve Gp-Relief
1227750 Valve Gp-Relief
12***50Valve Group-Relief; -Negative Flow Control1
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1373715 Valve Gp-Relief
1475777 Valve Gp-Relief
1438144 Valve Gp-Relief
1710060 Valve Gp-Relief
1289090 Valve Gp-Relief
1077058 Valve Gp-Selector
10***58Valve Group-Selector; -Hydraulic Activation Control1
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1195176 Valve Gp-Blocker
1232430 Valve Gp-Shuttle
12***30Valve Group-Shuttle; (Work Tool)1
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1120083 Valve Gp-Shuttle
11***83Valve Group-Shuttle; -Third Pedal, Straight Travel1
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1211490 Valve Gp-Solenoid
1373713 Valve Gp-Solenoid
1119916 Valve Gp-Press Reducing Sol
11***16Valve Group-Solenoid; -Grapple Signal-Ground Saw, Grapple Control1
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1211491 Valve Gp-Solenoid
12***91Valve Group-Solenoid; -Hydraulic Activation Control1
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1163420 Valve Gp-Cushion Crossover Rlf
11***20Valve Group-Swing Cushion; -Anti-Reaction, Fine Swing1
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1119993 Valve Gp-Traction Control
11***93Valve Group-Travel Counterbalance1
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Implements
0875960 Adjuster Gp-Bucket
08***60Adjuster Group-Bucket; -E, F-Family1
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4i4070 Adjuster Gp-Bucket
4I***70Adjuster Group-Bucket; -G/U/V/Tb-Family1
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1580058 Boom Ar
12***16Lines Group-Boom; (Boom)1
12***46Lighting Group-Boom; (Boom)1
12***47Lines Group-Grease; -Boom, Boom Cyls, Stick Cyl1
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1580057 Boom Ar
12***15Lines Group-Boom; (Boom)1
12***46Lighting Group-Boom; (Boom)1
12***43Lines Group-Grease; -Boom, Boom Cyls, Stick Cyl, Hydraulic Hose; Hose1
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1679847 Boom Gp
1679846 Boom Gp
6i5070 Bucket & Adjuster Gp
11***08Bucket As; (Excavation)1
4I***70Adjuster Group-Bucket; -G/U/V/Tb-Family1
6I***70Bucket & Adjuster Group1
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6i5048 Bucket & Adjuster Gp
11***10Bucket As-Excavation; (Excavation)1
4I***70Adjuster Group-Bucket; -G/U/V/Tb-Family1
6I***48Bucket & Adjuster Group1
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1510622 Bucket & Adjuster Gp
08***60Adjuster Group-Bucket; -E, F-Family1
15***22Bucket & Adjuster Group1
15***86Bucket As-Excavation; (Excavation)1
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1271401 Bucket & Adjuster Gp
12***01Bucket & Adjuster Group1
13***08Bucket As-Excavation; -U-Family1
4I***70Adjuster Group-Bucket; -G/U/V/Tb-Family1
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1510688 Bucket & Adjuster Gp
15***88Bucket & Adjuster Group1
15***89Bucket As-Excavation; (Excavation)1
4I***70Adjuster Group-Bucket; -G/U/V/Tb-Family1
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6i5043 Bucket & Adjuster Gp
08***60Adjuster Group-Bucket; -E, F-Family1
6I***43Bucket & Adjuster Group1
7Y***50Bucket As-Excavation; (Excavation)1
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6i5042 Bucket & Adjuster Gp
08***60Adjuster Group-Bucket; -E, F-Family1
4I***00Bucket As-Excavation; (Excavation)1
6I***42Bucket & Adjuster Group1
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1413782 Bucket & Adjuster Gp
08***60Adjuster Group-Bucket; -E, F-Family1
14***82Bucket & Adjuster Group1
14***83Bucket As-Excavation; (Excavation)1
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1413737 Bucket & Adjuster Gp
10***83Protector Group-Sidebar1
14***37Bucket & Adjuster Group1
14***82Bucket & Adjuster Group1
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1510633 Bucket & Adjuster Gp
08***60Adjuster Group-Bucket; -E, F-Family1
15***33Bucket & Adjuster Group1
15***34Bucket As-Excavation; (Excavation)1
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1413736 Bucket & Adjuster Gp
13***69Bucket & Adjuster Group1
14***36Bucket & Adjuster Group1
7Y***48Sidecutter Group; -(E & F Family)1
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6i5040 Bucket & Adjuster Gp
08***60Adjuster Group-Bucket; -E, F-Family1
6I***40Bucket & Adjuster Group1
7I***67Bucket As-Trenching; (Trenching)1
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1372869 Bucket & Adjuster Gp
08***60Adjuster Group-Bucket; -E, F-Family1
13***69Bucket & Adjuster Group1
13***70Bucket As-Excavation; (Excavation)1
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6i5071 Bucket & Adjuster Gp
11***09Bucket As-Excavation; (Excavation)1
4I***70Adjuster Group-Bucket; -G/U/V/Tb-Family1
6I***71Bucket & Adjuster Group1
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1499665 Bucket Ar
14***65Bucket Ar1
6I***42Bucket & Adjuster Group1
7Y***48Sidecutter Group; -(E & F Family)1
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1499666 Bucket Ar
14***66Bucket Ar1
6I***43Bucket & Adjuster Group1
7Y***48Sidecutter Group; -(E & F Family)1
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1499673 Bucket Ar
14***73Bucket Ar1
6I***70Bucket & Adjuster Group1
8J***42Tip Group-Long; -J-550, Heavy-Duty6
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1499670 Bucket Ar
12***01Bucket & Adjuster Group1
14***70Bucket Ar1
7Y***19Sidecutter Group1
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1499668 Bucket Ar
10***83Protector Group-Sidebar1
14***68Bucket Ar1
15***22Bucket & Adjuster Group1
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1499672 Bucket Ar
11***93Protector Group-Side Bar1
14***72Bucket Ar1
15***88Bucket & Adjuster Group1
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1499669 Bucket Ar
10***83Protector Group-Sidebar1
14***69Bucket Ar1
15***33Bucket & Adjuster Group1
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1132108 Bucket As-Excavation
7y9150 Bucket As-Excavation
7Y***50Bucket As-Excavation; (Excavation)1
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1132109 Bucket As-Excavation
11***09Bucket As-Excavation; (Excavation)1
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1510634 Bucket As-Excavation
15***34Bucket As-Excavation; (Excavation)1
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1372870 Bucket As-Excavation
13***70Bucket As-Excavation; (Excavation)1
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1510623 Bucket As-Excavation
15***23Bucket As-Excavation; (Excavation)1
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1633551 Bucket As-Excavation
16***51Bucket As-Excavation; (Excavation)1
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4i4100 Bucket As-Excavation
4I***00Bucket As-Excavation; (Excavation)1
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1132110 Bucket As-Excavation
11***10Bucket As-Excavation; (Excavation)1
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1413783 Bucket As-Excavation
14***83Bucket As-Excavation; (Excavation)1
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1332408 Bucket As-Excavation
13***08Bucket As-Excavation; -U-Family1
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1584086 Bucket As-Excavation
15***86Bucket As-Excavation; (Excavation)1
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1583965 Bucket As-Excavation
15***65Bucket As-Excavation; (Excavation)1
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1510689 Bucket As-Excavation
15***89Bucket As-Excavation; (Excavation)1
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7i6967 Bucket As-Trenching
7I***67Bucket As-Trenching; (Trenching)1
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1271345 Lines Gp-Grease
1271399 Lines Gp-Grease
1271347 Lines Gp-Grease
12***47Lines Group-Grease; -Boom, Boom Cyls, Stick Cyl1
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1271343 Lines Gp-Grease
12***43Lines Group-Grease; -Boom, Boom Cyls, Stick Cyl, Hydraulic Hose; Hose1
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1373076 Lines Gp-Grease
1271397 Lines Gp-Grease
12***97Lines Group-Grease; -Autolube, Stk Cyl, Wk Tl Cyl1
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1373075 Lines Gp-Grease
1348977 Lines Gp-Grease
1277521 Linkage Ar-Bucket
11***36Cylinder & Lines Group-Bucket; (Bucket)1
12***21Linkage Ar; -T-Family1
16***56Linkage Group-Bucket; -T-Family1
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1277522 Linkage Ar-Bucket
12***22Linkage Ar-Bucket; -U-Family1
12***33Cylinder & Lines Group-Bucket; (Bucket)1
16***57Linkage Group-Bucket; -U-Family1
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1679857 Linkage Gp-Bucket
16***57Linkage Group-Bucket; -U-Family1
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1679856 Linkage Gp-Bucket
16***56Linkage Group-Bucket; -T-Family1
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1401490 Lubrication Ar-Automatic
12***45Lines Group-Grease; (Grease)1
12***99Lines Group-Grease; (Grease)1
14***90Lubrication Ar-Automatic1
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1401491 Lubrication Ar-Automatic
12***49Lines Group-Grease; (Grease)1
12***75Lines Group; (Grease)1
14***91Lubrication Ar-Automatic1
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1401492 Lubrication Ar-Automatic
12***49Lines Group-Grease; (Grease)1
12***76Lines Group; (Grease)1
14***92Lubrication Ar-Automatic1
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1401489 Lubrication Ar-Automatic
12***45Lines Group-Grease; (Grease)1
12***97Lines Group-Grease; -Autolube, Stk Cyl, Wk Tl Cyl1
14***89Lubrication Ar-Automatic1
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1122493 Protector Gp
11***93Protector Group-Side Bar1
11***94Protector-Side Bar2
13***98Pin-G.E.T.4
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1013083 Protector Gp
10***83Protector Group-Sidebar1
10***59Retainer As.-Ground Engaging Tool4
13***38Pin-G.E.T.4
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7y2147 Sidecutter Gp
7y2148 Sidecutter Gp
7Y***48Sidecutter Group; -(E & F Family)1
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7y0919 Sidecutter Gp
1580064 Stick Ar-Hoe
12***47Lines Group-Stick; -Bucket Cylinder1
15***64Stick Ar1
16***52Stick Group-Hoe; (Hoe)1
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1580062 Stick Ar
12***46Lines Group-Stick; -Medium1
15***62Stick Ar1
16***51Stick Group-Hoe; (Hoe)1
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1580067 Stick Ar-Hoe
12***49Lines Group-Stick; -Bucket Cylinder1
15***67Stick Ar1
16***55Stick Group-Hoe; (Hoe)1
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1580060 Stick Ar-Hoe
12***45Lines Group-Stick; -Bucket Cylinder1
13***77Lines Group-Grease; (Grease)1
15***60Stick Ar1
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1580066 Stick Ar-Hoe
12***48Lines Group-Stick; -Bucket Cylinder1
15***66Stick Ar1
16***54Stick Group-Hoe; (Hoe)1
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1679855 Stick Gp-Hoe
1679854 Stick Gp-Hoe
1679852 Stick Gp-Hoe
1679849 Stick Gp-Hoe
1679851 Stick Gp-Hoe
9w6476 Tip Gp
3g3352 Tip Gp-Penetration
9n4566 Tip Gp
9n4565 Tip Gp
9w6477 Tip Gp
8e3758 Tip Gp-Short
8E***58Tip Group-Abrasion; -J-460, Heavy-Duty1
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8e3759 Tip Gp-Abrasion
6y5373 Tip Gp-Long
6Y***73Tip Group-Long; -J-550, Heavy-Duty1
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9n4562 Tip Gp-Long
8j9842 Tip Gp-Long
8J***42Tip Group-Long; -J-550, Heavy-Duty1
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9n4563 Tip Gp-Long
9N***63Tip Group-Long; -J-450, Heavy-Duty1
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9n4564 Tip Gp-Penetration
8j9841 Tip Gp-Short
9n4561 Tip Gp-Short
8j9840 Tip Gp-Wide
9n4560 Tip Gp-Wide
Lubrication System
1661329 Base Gp-Oil Filter
1172786 Cover Gp-Oil Filter Base
11***86Cover Group-Oil Filter Base; -Engine1
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1337003 Filler Gp-Engine Oil
13***03Filler Group-Engine Oil; (Engine Oil)1
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1446648 Filter Gp-Engine Oil
14***48Filter Group-Engine Oil; (Engine Oil)1
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1337001 Gauge Gp-Oil Level (Dipstick)
13***01Gauge Group-Oil Level (Dipstick); (Oil Level) (Dipstick)1
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6i6347 Lines Gp-Oil Drain
1751416 Lines Gp-Turbocharger Oil
17***16Lines Group-Turbocharger Oil; (Turbocharger Oil)1
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1318914 Mounting Gp-Engine Oil Filter
13***14Mounting Group-Engine Oil Filter; (Engine Oil Filter)1
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1318913 Mounting Gp-Engine Oil Filter
13***13Mounting Group-Fuel Filter; (Engine Oil Filter)1
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1516538 Fumes Disposal Gp
15***38Mounting Group-Fumes Disposal; (Fumes Disposal)1
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1172746 Pump Gp-Engine Oil
9y8073 Pump Gp-Engine Oil
Operator Station
1557022 Air Conditioner & Mounting Gp
15***22Air Conditioner & Mounting Group1
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1680808 Air Conditioner Gp
1597855 Air Conditioner Gp
1557021 Air Conditioner Gp
12***48Duct Group-Defroster1
12***49Duct Group-Cab Air1
12***50Duct Group-Air1
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1229602 Arm As-Wiper
1474833 Blower Gp
6i5444 Box Gp-Storage
1566530 Cab Gp (Basic) (Part 1 Of 2)
1566529 Cab Gp
1566527 Cab Gp
1566528 Cab Gp (Basic) (Part 2 Of 2)
1566530 Cab Gp (Basic) (Part 2 Of 2)
1566528 Cab Gp (Basic) (Part 1 Of 2)
1241689 Compressor Gp-Refrigerant7
12***89Compressor Group-Refrigerant; (Refrigerant)1
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1282147 Condenser & Mounting Gp
1474803 Condenser & Mtg Gp-Air Cond
14***03Condenser & Mtg Group-Refrigerant1
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1116278 Console Gp-Operator
1557008 Console Gp
1557084 Console Gp
1557027 Cover Gp-Storage
1116277 Cover Gp-Storage
1680746 Distributor As
1557053 Door Gp-Cab
1557054 Door Gp-Cab
1397151 Duct As
1352255 Duct As
1282150 Duct Gp-Air
1282149 Duct Gp-Air
1397150 Duct Gp-Air
1282148 Duct Gp-Defrost
1760469 Guard Ar-Overhead
12***84Lighting Group-Flood1
14***54Guard Group-Overhead; (Overhead)1
17***69Guard Ar-Overhead1
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1401458 Guard Ar-Vandalism
11***21Guard Group-Vandalism1
14***58Guard Ar-Vandalism1
14***90Box & Mounting Group1
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1401457 Guard Ar-Vandalism
12***07Guard Group-Vandalism1
14***57Guard Ar-Vandalism1
14***90Box & Mounting Group1
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1282156 Guard Gp-Window
1473954 Guard Gp-Overhead
14***54Guard Group-Overhead; (Overhead)1
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1116321 Guard Gp-Vandalism
1244007 Guard Gp-Vandalism
4i1273 Hatch Gp
4i4204 Hatch Gp
1229648 Headrest As
1540678 Heater & Mounting Gp
1519586 Heater Ar
13***62Lines Group-Heater; (Heater)1
14***74Pulley Group1
15***86Heater Ar-Cab1
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1680809 Heater Gp
1597856 Heater Gp
1254852 Horn Gp-Electric
1597744 Lever As
15***44Lever Group-Control; (Hydraulic Controls Lockout) (Hydraulic Activation Control)1
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1282146 Lines Gp-Air Conditioner-Part 2 Of 2
1282146 Lines Gp-Air Conditioner-Part 1 Of 2
1397262 Lines Gp-Heater
7y0059 Literature Gp
09***45Cable; (Lanyard)1
5P***58Sleeve; (Cable Splice)2
5P***00Key Total 2 Pieces Per Unit; (Literature Compartment)2
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1464959 Mirror Gp-Rear View
1060176 Monitor Gp-Operator
1229603 Motor As-Window Wiper
1133452 Motor As-Window Wiper
1540591 Platform Gp-Operator
1597672 Seat As
1540775 Seat As
1229625 Seat Belt Gp
12***25Seat Belt Group; -Retractable, 3-In1
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1502200 Seat Gp
1243925 Seat Gp
1116282 Support Gp-Seat
1116283 Seat Gp
1519617 Seat Gp
1116281 Support Gp-Seat
1300340 Suspension As-Seat
1243926 Suspension Gp-Seat
1116391 Suspension Gp-Seat
8r1774 Bottle Gp-Window Washer
1116313 Visor Gp-Sun
1566477 Washer Gp-Window
1557058 Window As-Door
1557043 Window Gp
1557045 Window Gp
1397215 Wiper & Washer Gp
13***15Wiper & Washer Group-Window; -Lower1
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1557041 Wiper Gp-Window
Power Train
1141407 Fastener Gp-Swing & Final Dr
11***07Fastener Group-Swing & Final Dr1
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1362808 Final Drive Gp
1362809 Final Drive Gp
1156399 Sprocket Gp-Nonsegmented
11***99Sprocket Group; (Non-Segmented)1
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Service Equipment And Supplies
1277604 Film Gp
1277605 Film Gp
1205101 Film Gp
1277565 Plate & Film Gp-Part 2 Of 3
1277565 Plate & Film Gp-Part 1 Of 3
1806917 Film Gp
1205095 Film Gp
1277565 Plate & Film Gp-Part 3 Of 3
1277564 Plate & Film Gp-Part 2 Of 3
1277564 Plate & Film Gp-Part 1 Of 3
1277564 Plate & Film Gp-Part 3 Of 3

345B serial number reference

The PIN plate is riveted to the upper frame on the right-hand side, near the base of the operator's cab; the engine also carries its own serial plate on the block. Read the first three characters of the PIN as the prefix, which identifies the build/model series, and the digits that follow as the sequential unit number; on later 17-character PIN formats the same 3-letter prefix plus unit number make up the last 8 characters of the full PIN.

PrefixIdentifies
6XS345B / 345B L, early standard PIN range
2ZW345B / 345B L, standard PIN range
3MW345B, standard PIN range
6MW345B / 345B L parts-catalog range
8KW345B / 345B L parts and service manual range
9CW345B / 345B L parts manual range
AMD345B, standard configuration
AMJ345B, standard configuration
AMN345B, standard configuration
BFG345B / 345B L / 345B LC combined range
9GS345B, unconfirmed extent

Frequently asked questions

What engine does the Caterpillar 345B use?

A Caterpillar 3176C ATAAC turbocharged, air-to-air aftercooled inline-six diesel. The standard-undercarriage 345B is rated around 216 kW (290 hp) net; longer-undercarriage L configurations carry a higher factory rating, close to 239 kW (321 hp) net, or 257 kW (345 hp) gross. Exact rating varies by configuration and application.

What is the operating weight of the Caterpillar 345B?

Roughly 43 tonnes (about 94,800 lb) in standard configuration. Long-undercarriage L versions built for mass excavation run heavier, up to about 51 tonnes (approximately 113,000 lb). Actual weight varies by undercarriage, boom/stick, counterweight, and attachment.

What replaced the Caterpillar 345B?

The 345B was followed by the 345B Series II / 345B L Series II update, then by the 345C and 345C L, introduced around 2005 with Cat's ACERT-technology C13 engine.

What 345B owners discuss

What's a known failure mode on the 345B's hydraulic pump that causes a sudden total loss of hydraulic pressure?
On some 345B pumps the drive coupling can walk off the input shaft and end up riding behind the flywheel-side coupling cup. The result is no pressure to any circuit even though the engine runs fine and sounds normal. Pull the pump, reseat the coupling on the shaft, and check the housing for metal shavings before putting it back in service. If a coupling has walked once, check coupling retention and flywheel housing alignment at the next service interval so it doesn't recur.
Why does a hydraulic circuit lose pressure or start to drift only after the machine has been working a while and the oil is hot?
This is usually worn O-rings or backup rings inside a control valve section or a cylinder seal kit. Backup rings harden and shrink through heat cycling, and once oil thins out at operating temperature the section starts to bypass. Cold, thick oil can mask the leak entirely, which is why the problem only shows up after warm-up. Isolate the affected section with a pressure test at full operating temperature rather than guessing from symptoms. Because pressure loss on a loaded circuit can let an attachment or the boom drift unexpectedly, have your dealer verify the affected valve section and cylinder seals before returning the machine to full load work.
What undercarriage and final-drive wear pattern shows up on a 345B running in rock or demolition work?
Owners report undercarriage wear adding up fast on rough or rocky ground once inspections lag. The most common final-drive failure starts as a leak at the sprocket, traced to a failed face (duo-cone) seal: once debris packs tightly around the final drive motor it can push the seal faces apart, and the resulting scoring lets gear oil leak out for good. Pressure-washing the undercarriage at the end of each shift, plus routine checks of rollers, idlers, and track links for flat spots or excess wear, is the standard way owners stay ahead of this failure.
What engine does the 345B use, and are there known quirks with it?
The 345B is built around the Cat 3176C ATAAC, a turbocharged, air-to-air aftercooled inline-six under Cat's ADEM II electronic engine control, rated around 216 kW (290 hp) gross on the factory spec sheet (gross output varies slightly by boom/stick configuration). A recurring complaint on this engine family is fuel showing up in the crankcase oil, usually traced to worn injector O-rings and sleeve seals, or a leaking hand-primer pump gasket, rather than a major internal fault. After any fuel filter change the fuel system needs to be hand-primed until the return line runs free of bubbles, or the engine can crank without starting. Fuel-diluted oil affects bearing lubrication, so have your dealer verify the source of any fuel-in-oil finding and change the oil before extended running.
The engine speed dial doesn't respond, the display counts up but the engine stays at low idle. What's going on?
Owners trace this to the electronic governor circuit rather than the dial itself. First check whether the governor motor responds to the backup or manual switches; if it does, the wiring and motor are good and the fault is upstream in the speed sensor or the electronic control logic, which usually needs a diagnostic tool and recalibration to sort out. On machines fitted with a factory auxiliary hydraulic controller, water intrusion into that controller has also been reported to interfere with the throttle signal, since the speed dial routes through it.
Swing won't release even with the bypass switch on and voltage confirmed at the solenoid. What's failing?
Once voltage at the solenoid is confirmed, this points to the swing brake solenoid itself rather than the switch or wiring. A jumper test at the switch is the standard way to isolate switch/wiring from the solenoid: bypassing the switch should force the engine control to raise idle, and if the brake still doesn't release with correct voltage present, the solenoid has failed. An unreleased or unpredictable swing brake is a safety issue around other equipment and personnel, so have your dealer verify solenoid function and brake release pressure before returning the machine to work.
What should I check before buying a used 345B?
Beyond the usual structural walk-around, welds at the boom-to-stick and stick-to-bucket pins, play in pins and bushings, and swing-ring play checked with a quarter-turn test, a few 345B-specific points are worth confirming: pull the pump cover and check coupling engagement, run the hydraulics to full operating temperature and watch for circuit-specific pressure drop or drift, confirm the engine speed dial responds cleanly across its range, and check for a return-filter restriction light or other unexplained monitor codes, especially on later Series II machines. Ask for hour-meter history: reaching 15,000 or more hours on a well-maintained 345B is not unusual, but a major overhaul is typically expected somewhere in that range, so hours alone don't tell the whole condition story. Have a dealer or third-party inspection done before purchase, with particular attention to the hydraulic pump and undercarriage.

Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.

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