Caterpillar 242B3
Caterpillarskid steer loader

Caterpillar 242B3

Maintenance schedule, common problems & OEM parts breakdown

The Cat 242B3 is a large-frame, wheeled skid steer loader in Caterpillar's B Series 3 lineup, built roughly through the mid-to-late 2010s before the D3 series took over. It runs a Cat C3.4 DIT, a 3.3-liter four-cylinder turbocharged diesel rated at 53 kW (71 hp) net and 56 kW (75 hp) gross at 2500 rpm, driving a hydrostatic transmission through roller-chain final drives, with an optional two-speed travel system. Operating weight runs about 3,180 kg (7,010 lb) depending on configuration, with a rated operating capacity near 975 kg (2,150 lb) at 50% of tip load. It followed the 242B and 242B Series 2, and was succeeded by the 242D3. Cat offered it with standard-flow or high-flow hydraulics, open canopy or enclosed cab, and single- or two-speed travel.

B Series 3 was a real powertrain update, not a badge change: the C3.4 DIT replaced the earlier B Series 2 engine with roughly 25% more net power and higher torque, hydraulic flow rose to 83 L/min (22 gpm) standard with a 117 L/min (31 gpm) option, and larger lift/tilt cylinders added double-digit breakout force gains. Cat also added automatic glow-plug activation, on-demand cooling fan control and a simplified dead-engine hydraulic-lowering handle. These machines meet Tier 4 Interim / EU Stage IIIA emissions rules, ahead of the Tier 4 Final electronics on the following D3 series. That puts the 242B3 in a sweet spot for the used and parts market: more power and hydraulic muscle than a B Series 2, without the aftertreatment complexity of a D3, and shared driveline and chain-drive components across the B3 skid steer range keep parts sourcing straightforward.

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 242B3 specifications

Engine

Engine modelCat C3.4 DIT, 4-cylinder in-line turbocharged diesel with direct injection
Gross power56 kW (75 hp) per SAE J1995, rated speed 2500 rpm
Net power53 kW (71 hp) per SAE J1349 / ISO 9249
Displacement, bore and stroke3.3 L (201 cu in); bore 94 mm (3.7 in), stroke 120 mm (4.7 in)
EmissionsTier 4 Interim (EPA) / Stage IIIA (EU) compliant

Weights

Operating weight3,179 kg (7,008 lb) in baseline configuration: single-speed drive, open ROPS cab, 1,676 mm (66 in) dirt bucket, 12x16.5 tires, no counterweight, manual quick coupler, operator and full fluids included
Shipping weightapprox. 2,895 kg (6,380 lb); crated/transport figure, varies by configuration

Dimensions

Wheelbase1,094 mm (43.1 in)
Overall length without bucket2,760 mm (108.7 in)
Overall length with bucket on ground3,437 mm (135.3 in)
Width over tires1,676 mm (66 in)
Height to top of cab2,019 mm (79 in)
Maximum overall height, bucket raised3,918 mm (154 in)
Ground clearance178 mm (7 in)
Bucket pin height at maximum lift3,086 mm (121 in)
Maximum reach, arms parallel to ground1,216 mm (48 in)
Departure angle28 degrees

Performance

Travel speed, single-speed drive12.4 km/h (7.7 mph) forward or reverse
Travel speed, optional two-speed driveup to 18.4 km/h (11.4 mph) forward or reverse
Rated operating capacity975 kg (2,150 lb) standard; 1,000 kg (2,200 lb) with optional counterweight
Tipping load1,950 kg (4,300 lb)
Breakout force, tilt cylinder2,204 kg (4,507 lb)
Standard auxiliary hydraulic flow83 L/min (22 gal/min) at 23,000 kPa (3,335 psi); approx. 32 kW (42.8 hp) hydraulic power
Optional high-flow auxiliary hydraulics117 L/min (31 gal/min) at 23,000 kPa (3,335 psi); approx. 45 kW (60.3 hp) hydraulic power
Maximum dump angle50 degrees

Service capacities (summary)

Fuel tank58 L (15.3 gal)
Hydraulic system, total55 L (14.5 gal), including 35 L (9.2 gal) hydraulic tank
Engine crankcase (oil with filter)9 L (2.4 gal)
Cooling system10 L (2.6 gal)
Drive chain case, each side6 L (1.6 gal)

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

242B3 fluids & capacities

SystemCapacityRecommended fluid
Engine crankcase (with filter)9.0 L (2.4 US gal / 9.5 US qt)Cat DEO-ULS or Cat DEO diesel engine oil, Cat ECF spec. SAE 10W-30 for -18C to 40C (0F to 104F). SAE 15W-40 for -9.5C to 50C (15F to 122F). Cat DEO-ULS Cold Weather SAE 0W-40 for extreme cold, -40C to 40C (-40F to 104F).
Cooling system10.0-12.5 L (2.6-3.3 US gal / 2.2-2.8 Imp gal), varies by configuration/series - confirm at sight gaugeCat ELC (Extended Life Coolant), premixed, preferred. Cat DEAC (Diesel Engine Antifreeze/Coolant) acceptable second choice. Factory fill rated to -36C (-33F). Never run on water alone.
Fuel tank58.0 L (15.4 US gal / 12.8 Imp gal)Cat-spec distillate diesel meeting ASTM D975 or EN 590. Biodiesel blends up to B5 (US) or B5-B7 (EU) acceptable. ULSD not mandatory on this non-Tier 4 Final engine.
Hydraulic tank35.0 L (9.2 US gal / 7.7 Imp gal)Cat HYDO Advanced 10 (SAE 10W), factory fill, preferred for -20C to 40C (-4F to 104F). See hydraulic system row for full viscosity range by climate.
Hydraulic system (total, tank plus lines and cylinders)55.0 L (14.5 US gal)Cat HYDO Advanced 10 (SAE 10W) preferred, -20C to 40C (-4F to 104F), extendable to 50C (122F) with the High Ambient Cooling option. Cat HYDO Advanced 30 (SAE 30) for 0C to 50C (32F to 122F). Cat BIO HYDO Advanced (ISO 46 multi-grade) for -30C to 45C (-22F to 113F). Second-choice oils: Cat MTO, Cat DEO, Cat DEO-ULS, Cat TDTO, Cat TDTO Cold Weather, Cat TDTO-TMS. Below -20C (-4F), switch the factory-fill 10W oil to 0W-30 hydraulic oil.
Final drives / drive chain case, each side6.0-8.0 L (1.6-2.1 US gal / 1.3-1.8 Imp gal) each side, varies by configuration/seriesCat DEO-ULS or Cat DEO diesel engine oil, same spec family as the crankcase, not a gear oil. SAE 10W-30 for -18C to 40C (0F to 104F). SAE 15W-40 for -9.5C to 50C (15F to 122F). Cat DEO-ULS Cold Weather SAE 0W-40 for extreme cold.
Grease (spec only)N/A - service item at grease-gun pin joints, no bulk refill capacityCat Advanced 3Moly, NLGI Grade 2, preferred multipurpose grease for external lubrication points across a wide ambient range. Cat Arctic Platinum or Cat Desert Gold for extreme cold or hot climates. Cat Multipurpose Grease acceptable for general bearing lubrication.

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

Caterpillar 242B3 maintenance schedule

Service intervalTasks
Every 10 h
  • Check engine oil, coolant and hydraulic tank levels before starting each shift.
  • Walk around the machine and inspect for leaks, loose fasteners, tire damage and worn drive-chain guards.
  • Test the seat-bar/seat-belt interlock and back-up alarm before operating.
  • Clean debris from the radiator, oil cooler and engine compartment screens.
  • Weekly: grease boom and cylinder pivot pins.
  • Weekly: check chain-case oil level and visually inspect chain tension.
Every 250 h
  • Check and adjust alternator/fan belt tension.
  • Clean the primary engine air filter element.
  • Clean the cab fresh-air and recirculation filters.
  • Check and adjust drive chain tension on both sides.
  • Check chain-case oil level and top off as needed.
Every 500 h
  • Change engine oil and replace the engine oil filter.
  • Replace the primary and secondary fuel filters, then bleed the fuel system.
  • Replace the primary and secondary engine air filter elements.
  • Replace the hydraulic tank breather.
  • Replace the cab air filters.
  • Inspect drive chains for stretch and replace if beyond service limit.
Every 1,000 h
  • Change the chain-case oil in both final drives.
  • Change hydraulic system fluid and replace the hydraulic oil filter.
  • Replace the alternator/fan belt.
  • Inspect drive motors, sprockets and idlers for wear.
  • Send engine and hydraulic oil samples for lab analysis.
Every 2,000 h
  • Have a Cat technician check and adjust engine valve lash.
  • Test alternator and starter output under load.
  • Inspect the turbocharger for shaft play and boost leaks.
  • Inspect hydrostatic drive motors and the main pump for wear or internal leakage.
Every 3,000 h
  • Drain, flush and refill the cooling system with fresh coolant.
  • Inspect boom and tilt-cylinder pins and bushings, replace if worn beyond limits.
  • Inspect chain-case sprockets and chains for wear, rebuild or replace as needed.
  • Have injectors tested and serviced if power loss or hard starting is noted.

Servicing the 242B3 beyond the schedule

Predictive Maintenance & Fluid Analysis

Put the C3.4 DIT engine oil, hydraulic fluid and chain-case oil on a scheduled sampling program rather than waiting for symptoms. The B Series 3 ECM logs diagnostic codes and running hours, so pull that data at every service to catch turbo boost drift or hydrostatic pump wear early. Watch hydraulic fluid for water contamination through the tank breather and metal in chain-case oil samples, which flags sprocket or chain wear well before it costs a drive-motor rebuild.

Corrective & Common Repairs

Most 242B3 downtime traces to hydraulic hose and seal leaks around the lift/tilt cylinders and quick-couplers, fuel-system air intrusion after filter changes causing hard starts (bleed the system every time), and clogged radiators or oil coolers driving overheating in dusty or debris-heavy work. Roller drive chains stretch and need regular tension checks; running them loose accelerates sprocket wear. Keep the cab and engine air filters clean, since airflow restriction is the single biggest driver of unscheduled repairs on this machine.

Overhaul & Rebuild Points

At higher hours, expect wear at the radial-lift boom pivot pins and bushings, tilt-cylinder rod seals, and the roller-chain final drives, which are the wear items equivalent to undercarriage on a track machine. The C3.4 DIT's turbocharger and injectors are the typical engine-side rebuild candidates once power or smoke complaints show up. Hydrostatic drive motors and the main pump warrant inspection during any major overhaul, since the 242B3's higher hydraulic flow versus the B Series 2 generation puts more load through those components.

Seasonal & Environment Servicing

Cold climates benefit from the B Series 3's automatic glow-plug activation, but still verify coolant concentration and battery condition before winter; block heaters help with sustained sub-zero starts. In hot, dusty environments, clean the engine and cab air filters more often than the standard 250-hour interval and keep radiator and oil-cooler fins clear, since the on-demand cooling fan can't compensate for a plugged core. Wet or muddy sites accelerate chain-case seal wear and corrosion on exposed roller chains.

242B3 fault codes & troubleshooting

CodeMeaningLikely causeWhat to do
SPN 100 FMI 2Engine oil pressure signal erratic, intermittent, or out of rangeOil pressure sensor, connector corrosion, or shared harness fault (same circuit branch as coolant temp and barometric sensors)Inspect sensor connector and harness for corrosion or damage; confirm actual oil pressure with a mechanical gauge before condemning the sensor; pull the code with Cat ET and clear after repair
SPN 190 FMI 8Engine speed signal abnormal frequency, pulse width, or periodFaulty or misaligned engine speed/timing sensor, damaged tone wheel, or wiring fault on the C3.4-family engine used in this machineCheck speed sensor air gap and wiring, inspect connector pins for corrosion, verify with Cat ET before replacing the sensor
SPN 110 FMI 0Engine coolant temperature above normal operating range (most severe level)Low coolant level, plugged radiator or hydraulic oil cooler fins, weak fan drive, or thermostat stuck closedShut down and let cool; clean debris from cooling package; check coolant level and fan operation; verify sensor reading against a known-good temperature gauge
SPN 168 FMI 4Battery/system voltage below normalWeak or discharged battery, loose or corroded ground/battery cable, failing alternator, or blown charging fuseLoad-test battery, clean and tighten battery and ground connections, check alternator output at idle and rated speed, replace charging fuse if blown
SPN 94 FMI 18Engine fuel delivery pressure below normal (least severe level)Restricted or dirty fuel filter, air in the fuel system, weak lift pump, or fuel pickup restrictionCheck fuel filter condition and replace if due, inspect fuel lines for air leaks, verify lift pump pressure against spec, prime system after service
SPN 3720 (Aftertreatment DPF differential pressure / soot load) inducementDiesel particulate filter soot load high, regeneration needed or in progressExtended low-load/idle operation preventing passive regen, restricted exhaust, or a stopped/failed regeneration cycleMove to a clear area and run a stationary/parked regeneration per the operator display prompt; keep exhaust intake area clear; if regen repeatedly fails, have the DPF and exhaust back pressure checked with Cat ET
SPN 172 FMI 3Engine air inlet (intake manifold/boost) temperature signal above normal or open/short circuitIntake air temperature sensor fault, damaged connector, or chafed harness near the turbo/intake pipingInspect sensor and connector for heat damage, check wiring continuity, verify reading with Cat ET against ambient temperature before replacing the sensor

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

242B3 attachments & work tools

Buckets

General-purpose, high-capacity/heavy-duty, low-profile light-material, multi-purpose (4-in-1) and grapple-bucket variants are offered sized to the machine's roughly 1.7 m (66 in) frame width. Rated operating capacity of about 975 kg (2150 lb) at 50% of tipping load sets the practical payload ceiling regardless of bucket style chosen.

Pallet forks

Frame-and-tine pallet forks handle palletized loads, bagged landscape/nursery material and general site logistics. Usable fork capacity tracks the machine's rated operating capacity class, about 975 to 1,000 kg (2,150 to 2,200 lb), not a separate fork-only rating.

Grapples

Root/rock and utility grapple buckets or grapple-fork combinations handle brush, debris and irregular loads. The grapple jaw is actuated off the standard auxiliary hydraulic circuit, no extra hydraulic kit required.

Augers

An auger drive head with interchangeable bits covers post-hole and footing work. Standard-flow auxiliary hydraulics run smaller-diameter bits; larger-diameter augers perform better on the optional high-flow circuit.

Snow and other power-hungry rotary tools

Two-stage snow blowers, pickup/utility brooms, cold planers and brush cutters are called out by the manufacturer as power-hungry work tools for this class. These are matched to the optional high-flow auxiliary system rather than base standard flow, which can be undersized for them.

Blades

Angle/dozer-style blades cover light grading and snow-pushing duty, mounted through the same coupler as buckets. Blade tilt/angle functions run off the standard auxiliary circuit without needing the high-flow kit.

Coupler and mounting system

The standard quick coupler is hand-operated, using two high-leverage levers for manual work-tool engagement on a universal-pattern mounting shared broadly across skid steer brands. An optional hydraulic quick coupler adds cab-controlled engagement via a rocker switch so tools can be swapped without leaving the seat.

Auxiliary hydraulic arrangement

Standard-flow auxiliary hydraulics deliver about 83 lpm (22 gpm) at 230 bar (3335 psi). The optional high-flow system raises flow to about 117 lpm (31 gpm) at the same pressure, roughly 40% more hydraulic horsepower, for demanding tools. Optional deluxe joystick controls add one-touch continuous and momentary auxiliary-flow modes for finer work-tool control.

Lift geometry

The 242B3 uses a radial-lift loader boom rather than a vertical-lift design. This gives strong digging and breakout force through the pile but comparatively less forward reach and lift height at full boom extension, a factor for truck-loading buckets and high-dump forks.

Factory configuration options

An optional counterweight kit (one weight per side) raises rated operating capacity by roughly 45-57 kg (100-125 lb) per side, useful for longer-reach or rear-heavy tools. Cab guarding/polycarbonate window packages are offered across the related B-series/D-series skid steer lineup for brush and debris protection; confirm exact kit fitment for this model with a dealer.

All 242B3 assemblies by section

Every catalogued assembly group for the Caterpillar 242B3. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.

Air Inlet And Exhaust System
326-5330 Air Cleaner Gp
326-5331 Air Cleaner Gp
326-5332 Air Cleaner Gp
247-6317 Lines Gp-Air
326-5338 Lines Gp-Air
315-7769 Lines Gp-Air
287-5323 Manifold Gp-Exhaust
335-5750 Manifold Gp-Inlet
258-2462 Muffler & Mounting Gp
272-3051 Muffler Gp
315-7768 Turbocharger Gp
Basic Engine
323-2009 Accessory Gp-Engine
292-4041 Bearing Gp-Main
315-8329 Camshaft Gp
287-4033 Connecting Rod Gp
28***33Tube Brace, Connecting Rod Group1
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315-7762 Cover Gp-Valve Mechanism
314-9860 Crankshaft Gp
330-7633 Cylinder Block Gp
233-5500 Cylinder Head Gp
326-5349 Drain Gp-Engine Oil
314-9861 Flywheel Gp
315-7766 Gear Gp-Front
280-8407 Guard Gp-Belt
361-2874 Housing Gp-Flywheel
315-8336 Housing Gp-Front
315-7761 Lifting Gp-Engine
326-5329 Mounting Gp-Engine
363-3884 Pan Gp-Oil
315-8348 Piston Gp
287-2922 Plug Gp-Engine
28***22Plug Group-Engine; -Cylinder Block, Lh1
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287-2983 Plug Gp-Engine
28***83Plug Group-Engine; -Cylinder Block, Rh1
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301-3396 Pulley Gp-Crankshaft
287-6114 Pulley Gp-Water Pump
287-6138 V-Belt Gp
235-5880 Valve Mechanism Gp
Cooling System
361-2880 Cooler Gp-Engine Oil
292-4040 Drain Gp-Coolant
315-8355 Housing & Regulator Gp
326-5340 Lines Gp-Water
287-6056 Pump Gp-Water
335-9117 Pump Gp-Water
326-5373 Radiator & Hyd Oil Cooler Gp
32***73Radiator & Hydraulic Oil Cooler Group1
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280-8260 Support Gp-Radiator
Electrical And Starting System
3e-7584 Lamp Gp-Head & Signal -Rh
105-2814 Alternator Gp-Charging
315-8353 Alternator Gp-Charging
328-2278 Battery & Wiring Gp
328-2345 Electronics Gp-Machine
235-5904 Glow Plug Gp
218-0943 Heater Gp-Jacket Water
218-0942 Heater Gp-Jacket Water
361-0452 Kit-Work Tool Wiring
361-0454 Kit-Work Tool Wiring
234-4328 Lamp Gp-Flood
23***28Lamp Group-Flood; -Front, Rear, Wide Range1
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234-7727 Lamp Gp-Flood
142-8634 Lamp Gp-Stop & Tail
14***34Lamp Group-Stop & Tail; -Stop, Tail1
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328-2346 Lamp Gp-Stop & Tail -Rear
142-7503 Lamp Gp-Stop & Tail
14***03Lamp Group-Stop & Tail; -12-Volt1
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328-2344 Lamp Gp-Stop & Tail -Rear
128-6985 Lamp Gp-Warning Beacon -Amber, Magnetic Mount, Rotating
12***85Lamp Group-Warning Beacon; -Amber, Magnetic Mount, Rotating1
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309-1325 Lamp Gp-Warning Beacon -Amber
30***25Lamp Group-Warning Beacon; -12-Volt, Amber1
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216-4746 Lighting Gp-Flood -Rear
218-6425 Lighting Gp-Flood -Front
328-2333 Lighting Gp-Roading
142-8653 Lighting Gp-Warning Beacon
14***53Lighting Group-Warning Beacon; -12-Volt1
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258-4135 Relay Gp -Main Power
143-0539 Starting Motor Gp-Electric
14***39Starting Motor Group-Electric; -12-Volt1
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287-6181 Starting Motor Gp-Electric
300-1071 Switch Gp-Pressure
30***71Switch Group-Pressure; -Engine Oil1
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328-2348 Switch Gp-Pressure
32***48Switch Group-Pressure; -Brake Light1
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184-1564 Switch Gp-Pressure -Brake Light
18***64Switch Group-Pressure; -Brake Light1
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328-2272 Wiring Gp-Cab
328-2276 Wiring Gp-Engine
230-3743 Wiring Gp-Horn -With Mounting
23***43Wiring Group-Horn; -With Mounting1
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328-2342 Wiring Gp-Machine -Demand Fan
32***42Wiring Group-Machine; -Demand Fan1
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328-2274 Wiring Gp-Machine
328-2335 Wiring Gp-Work Tool
Engine Arrangement
326-5240 Engine Ar-General
332-8660 Engine Ar-Primary
326-5328 Installation Ar-Engine
Frame And Body
326-5306 Bumper Gp-Rear
278-1292 Conversion Gp-Roading -Germany
27***92Conversion Group-Roading; -Germany1
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278-1293 Conversion Gp-Roading -Italy
27***93Conversion Group-Roading; -Italy1
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215-3926 Counterweight Gp
326-5609 Enclosure Gp-Engine
326-5573 Frame As-Lower
326-5474 Frame As-Upper
326-5442 Frame Gp-Lift Arm
326-5575 Frame Gp-Loader
156-9809 Guide Gp-Lines
15***09Guide Group-Lines; -Auxiliary Hydraulic1
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358-6921 Kit-Roading Conversion -Front
358-6919 Kit-Roading Conversion -Italy, Lights, Switches
35***19Kit-Roading Conversion; -Italy, Lights, Switches1
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340-7724 Kit-Roading Conversion -Germany
34***24Kit-Roading Conversion; -Germany1
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188-0147 Lifting Gp-Machine -4-Point
18***47Lifting Group-Machine; -4-Point1
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218-5969 Lifting Gp-Machine -Single Point
21***69Lifting Group-Machine; -Single Point1
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238-7671 Mirror & Mtg Gp-Rear View -With Roading Light Mount
23***71Mirror & Mtg Group-Rear View; -With Roading Light Mount1
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173-3021 Mounting Gp-Registration -With Wiring & Lights
17***21Mounting Group-Registration; -With Wiring & Lights1
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225-7963 Mounting Gp-Registration
326-5390 Suppression Gp-Sound
Fuel System
218-5602 Control Gp-Governor
326-5344 Lines Gp-Fuel
315-8350 Lines Gp-Fuel Injection
315-8352 Pump Gp-Fuel Injection
258-3442 Pump Gp-Fuel Prm & Prim Filter -Water Separator
25***42Pump Group-Fuel Prm & Prim Filter; -Water Separator1
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Hydraulic System
193-0447 Accumulator & Mtg Gp-Hydraulic
19***47Accumulator & Mtg Group-Hydraulic; -Work Tool1
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149-0686 Accumulator Gp-Hydraulic -Charged
14***86Accumulator Group-Hydraulic; -Charged1
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227-8807 Accumulator Gp-Hydraulic -Uncharged
22***07Accumulator Group-Hydraulic; -Uncharged1
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179-7001 Adapter Gp-Oil Line
17***01Adapter Group-Oil Line; -Unit Injector Pump1
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326-5499 Cylinder & Mtg Gp-Lift Arm
192-2640 Cylinder Gp-Hydraulic -Coupler
19***40Cylinder Group-Hydraulic; -Coupler1
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329-4955 Cylinder Gp-Lift
329-4953 Cylinder Gp-Tilt -Rh
329-4954 Cylinder Gp-Tilt -Lh
326-5730 Hydraulic Ar
326-5770 Hydraulic Ar -With Work Tool Positioner
32***70Hydraulic Ar; -With Work Tool Positioner1
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326-5670 Hydraulic Ar
354-6551 Lines Gp-Auxiliary Hydraulic
35***51Lines Group-Auxiliary Hydraulic1
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326-5751 Lines Gp-Coupler -Hydraulic
32***51Lines Group-Coupler; -Hydraulic1
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326-5731 Lines Gp-Hydraulic Oil Cooler
32***31Lines Group-Hydraulic Oil Cooler1
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326-5738 Lines Gp-Lift Cylinder -With Work Tool Positioner
32***38Lines Group-Lift Cylinder; -With Work Tool Positioner1
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326-5758 Lines Gp-Lift Cylinder -Without Work Tool Positioner
32***58Lines Group-Lift Cylinder; -Without Work Tool Positioner1
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234-0788 Lines Gp-Pilot -Direction, Speed
23***88Lines Group-Pilot; -Direction, Speed1
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326-5734 Lines Gp-Pilot -Work Tool
326-5746 Lines Gp-Pump
32***46Supply Check Valve, Lines Group-Pump1
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326-5778 Lines Gp-Tilt Cylinder -Without Work Tool Positioner
32***78Lines Group-Tilt Cylinder; -Without Work Tool Positioner1
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326-5737 Lines Gp-Tilt Cylinder -With Work Tool Positioner
32***37Lines Group-Tilt Cylinder; -With Work Tool Positioner1
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223-8418 Manifold & Solenoid Gp-Control
22***18Manifold & Solenoid Group-Control; -Work Tool Positioner1
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233-7128 Manifold Gp-Control -Quick Coupler
23***28Manifold Group-Control; -Quick Coupler1
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295-7221 Motor & Mtg Gp-Hydraulic Fan
29***21Motor & Mtg Group-Hydraulic Fan1
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258-2579 Motor & Mtg Gp-Hydraulic Fan
25***79Motor & Mtg Group-Hydraulic Fan1
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356-1900 Motor Ar-Hydraulic Fan -Standard
35***00Motor Ar-Hydraulic Fan; -Standard1
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356-1901 Motor Ar-Hydraulic Fan -Nacd
307-3036 Motor Gp-Gear -Hydraulic Fan
30***36Motor Group-Gear; -Hydraulic Fan1
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306-8137 Pump & Mtg Gp-Work Tool
30***37Pump & Mtg Group-Work Tool, Electrical Terminal1
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190-8084 Pump & Mtg Gp-Work Tool
238-7642 Pump Gp-Gear -Work Tool
289-6358 Pump Gp-Gear
326-5780 Tank & Mtg Gp-Hydraulic
326-5781 Tank Gp-Hydraulic
218-6725 Valve & Mtg Gp-Control
336-1320 Valve Gp-Control
33***20Valve Group-Control; -Work Tool1
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343-0868 Valve Gp-Pilot
34***68Valve Group-Pilot; -Direction, Speed1
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299-9119 Valve Gp-Pilot
295-1799 Valve Gp-Relief
195-9700 Valve Gp-Solenoid -12-Volt
19***00Valve Group-Solenoid; -12-Volt-Work Tool1
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Implements
222-5695 Bracket Gp-Support
Lubrication System
361-3334 Filter Gp-Engine Oil
287-5377 Lines Gp-Engine Oil
235-5895 Pump Gp-Engine Oil
287-5665 Valve Gp-Engine Oil Relief
Machine Arrangement
326-5410 Chassis Ar
326-5242 Common Ar
326-5483 Control Ar-Machine -Aux Proportional Flow, 2-Speed
32***83Control Ar-Machine; -Auxiliary Proportional Flow, 2-Speed1
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354-6536 Control Ar-Machine -On, Off Auxiliary Control, 1-Speed
35***36Control Ar-Machine; -On, Off Auxiliary Control, 1-Speed1
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354-6538 Control Ar-Machine -Aux Proportional Flow, 1-Speed
35***38Control Ar-Machine; -Auxiliary Proportional Flow, 1-Speed1
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326-5472 Control Ar-Machine
354-6537 Control Ar-Machine -Aux Proportional Flow, 1-Speed
35***37Control Ar-Machine; -Auxiliary Proportional Flow, 1-Speed1
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326-5280 Conversion Ar-Machine -Outside Nacd
32***80Conversion Ar-Machine; -Outside Nacd1
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326-5282 Conversion Ar-Machine
326-5300 Conversion Ar-Machine -Nacd
326-5281 Conversion Ar-Machine -Outside Nacd
32***81Conversion Ar-Machine; -Outside Nacd1
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356-1902 Conversion Ar-Machine -Germany
35***02Conversion Ar-Machine; -Germany1
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326-5284 Conversion Ar-Machine -Germany
32***84Conversion Ar-Machine; -Germany1
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Operator Station
176-3900 Accumulator Gp-Refrigerant -Uncharged
17***00Accumulator Group-Refrigerant; -With Desiccant1
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186-6190 Accumulator Gp-Refrigerant -Charged
18***90Accumulator Group-Refrigerant; -With Desiccant1
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229-8747 Air Conditioner & Mounting Gp
22***47Air Conditioner & Mounting Group1
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326-5556 Air Conditioner Ar
218-6405 Air Conditioner Gp
320-1389 Arm Gp-Window Wiper
236-4830 Armrest & Mounting Gp
236-4833 Armrest Gp
216-6146 Box Gp-Storage
218-6420 Box Gp-Storage -Literature
326-5400 Cab Ar
326-5552 Cab Ar-Enclosed Rops -Mech Susp Seat
32***52Cab Ar-Enclosed Rops; -Mech Susp Seat1
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326-5553 Cab Ar-Enclosed Rops -Mech Susp Seat & A/C
32***53Cab Ar-Enclosed Rops; -Mech Susp Seat & A/C1
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326-5550 Cab Ar-Open Rops
326-5551 Cab Ar-Open Rops -Mech Susp Seat
32***51Cab Ar-Open Rops; -Mech Susp Seat1
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326-5404 Cab As
326-5401 Cab Gp-Enclosed Rops
326-5357 Compressor Gp-Refrigerant
218-6348 Condenser & Mtg Gp-Refrigerant
21***48Condenser & Mtg Group-Refrigerant1
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218-6490 Control Gp-Handle -Work Tool
21***90Control Group-Handle; -Work Tool1
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218-6485 Control Gp-Handle -Direction, Speed
21***85Control Group-Handle; -Direction, Speed1
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231-4260 Control Gp-Handle -Rh
231-4258 Control Gp-Handle -Lh
231-4256 Control Gp-Handle -Lh
326-5267 Control Gp-Pilot Operated Hyd
32***67Control Group-Pilot Operated Hydraulic; -Hydrostatic1
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326-5265 Control Gp-Pilot Operated Hyd -Auxiliary
32***65Control Group-Pilot Operated Hydraulic; -Auxiliary1
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343-5542 Control Gp-Pilot Operated Hyd
34***42Control Group-Pilot Operated Hydraulic1
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326-5264 Control Gp-Pilot Operated Hyd
32***64Control Group-Pilot Operated Hydraulic; -Work Tool1
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343-5543 Control Gp-Pilot Operated Hyd
34***43Control Group-Pilot Operated Hydraulic1
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218-6419 Cover Gp-Console -Without Air Conditioner, Heater
21***19Cover Group-Console; -Without Air Conditioner, Heater1
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218-6440 Door & Mtg Gp-Cab -Polycarbonate
21***40Door & Mtg Group-Cab; -Polycarbonate1
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223-0600 Door & Mtg Gp-Cab -Glass
223-0616 Door Gp-Cab -Glass
276-3440 Door Gp-Cab -Polycarbonate
276-3615 Door Gp-Cab -Polycarbonate
218-6431 Door Gp-Cab -Glass
218-6394 Duct Gp-Cab Air
231-7327 Frame Gp-Window -Lh
231-7325 Frame Gp-Window -Rh
233-5632 Guard Gp-Rops/Fops
218-6400 Handhold Gp
218-6118 Handle Gp-Modular
229-8746 Heater & Mtg Gp-Cab
326-5555 Heater Ar-Cab
218-6393 Heater Gp-Cab
231-8122 Housing As-Side -Air Conditioner, Heater
23***22Housing As-Side; -Air Conditioner, Heater1
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326-5554 Installation Ar
234-0774 Lever Gp-Governor
326-5406 Liner Gp-Cab
326-5744 Lines Gp-Air Conditioner
326-5745 Lines Gp-Heater
258-4230 Mirror Gp-Rear View
249-2910 Module Gp-Warning Indicator
223-6537 Module Gp-Warning Indicator
330-5012 Motor Gp-Window Wiper
218-6370 Mounting Gp-Rops
328-2270 Panel Gp-Instrument
218-6428 Panel Gp-Side
229-8744 Panel Gp-Side -Without Heater Or A/C
22***44Panel Group-Side; -Without Heater Or A/C1
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327-8939 Pedal Gp-Governor
325-8382 Pedal Gp-Governor
326-5570 Platform Gp-Operator
218-6407 Seal Gp-Cab -Debris Barrier
21***07Seal Group-Cab; -Debris Barrier1
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276-7276 Seat Belt Gp
276-7277 Seat Belt Gp
276-6020 Seat Belt Gp
276-6019 Seat Belt Gp
142-9305 Seat Gp -Suspension
218-5562 Seat Gp -Static
219-4380 Seat Gp-Adjustable
218-6380 Spring Gp-Gas -Cab, Door
173-3022 Visor Gp-Cab
166-2569 Visor Gp-Cab
218-6411 Window Gp-Cab -Side
224-7057 Window Gp-Cab -Upper,Lh
195-6723 Window Gp-Cab
224-7058 Window Gp-Cab -Upper, Rh
Power Train
261-6255 Axle Gp
142-8758 Axle Gp
326-5790 Control Gp-Parking Brake
326-5797 Control Gp-Parking Brake -2-Speed
32***97Control Group-Parking Brake; -2-Speed1
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354-6543 Drive Gp-Tandem
326-5739 Filter & Lines Gp-Hydraulic
223-9974 Filter Gp-Oil -Hydraulic
326-5742 Lines Gp-Hydrostatic -Aux Proportional Flow, 1-Speed
32***42Lines Group-Hydrostatic; -Auxiliary Proportional Flow, 1-Speed1
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326-5701 Lines Gp-Hydrostatic -Aux Proportional Flow, 2-Speed
32***01Lines Group-Hydrostatic; -Auxiliary Proportional Flow, 2-Speed1
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248-1268 Manifold & Solenoid Gp-Control -Parking Brake
24***68Manifold & Solenoid Group-Control; -Parking Brake1
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293-6591 Manifold & Solenoid Gp-Control -Parking Brake, 2-Speed
29***91Manifold & Solenoid Group-Control; -Parking Brake, 2-Speed1
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308-0421 Manifold Gp-Return
30***21Sealing Washer, Manifold Group-Return1
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354-6539 Motor & Mtg Gp-Hydrostatic -2-Speed
35***39Motor & Mtg Group-Hydrostatic; -2-Speed1
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356-1938 Motor & Mtg Gp-Hydrostatic
307-3071 Motor Gp-Piston -2-Speed, Lh
30***71Motor Group-Piston; -2-Speed, Lh1
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307-3073 Motor Gp-Piston -2-Speed, Rh
30***73Motor Group-Piston; -2-Speed, Rh1
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280-7854 Motor Gp-Piston -Hydrostatic
28***54Motor Group-Piston; -Hydrostatic1
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218-0918 Mounting Gp-Pump
326-5250 Power Train Ar
354-6541 Pump & Mtg Gp-Hydrostatic -2-Speed
35***41Pump & Mtg Group-Hydrostatic; -2-Speed1
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354-6540 Pump & Mtg Gp-Hydrostatic -1-Speed
35***40Pump & Mtg Group-Hydrostatic; -1-Speed1
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341-7665 Pump Gp-Piston
341-7642 Pump Gp-Piston
265-2895 Tire & Rim Gp -Rh
265-2899 Tire & Rim Gp -Rh
165-2606 Tire & Rim Gp -Rh
185-9926 Tire & Rim Gp -Lh
185-9927 Tire & Rim Gp -Rh
165-4902 Tire & Rim Gp -Heavy-Duty, Rh
16***02Tire & Rim Group; -Heavy-Duty, Rh1
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150-8592 Tire & Rim Gp -Rh
165-4901 Tire & Rim Gp -Heavy-Duty, Lh
16***01Tire & Rim Group; -Heavy-Duty, Lh1
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185-8679 Tire & Rim Gp -Rh
142-7484 Tire & Rim Gp -Lh
265-2897 Tire & Rim Gp -Rh
165-2609 Tire & Rim Gp -Lh
185-9930 Tire & Rim Gp -Lh
185-9931 Tire & Rim Gp -Rh
185-8678 Tire & Rim Gp -Lh
199-5438 Tire & Rim Gp -Lh
265-2894 Tire & Rim Gp -Lh
165-2605 Tire & Rim Gp -Lh
265-2898 Tire & Rim Gp -Lh
165-2610 Tire & Rim Gp -Rh
199-5439 Tire & Rim Gp -Rh
265-2896 Tire & Rim Gp -Lh
259-8194 Valve Gp-Solenoid -Parking Brake
25***94Valve Group-Solenoid; -Parking Brake1
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216-0610 Valve Gp-Solenoid
178-2256 Wheel & Tire Ar -Heavy Duty
165-2602 Wheel & Tire Ar -Heavy Duty
252-0346 Wheel & Tire Ar
185-8667 Wheel & Tire Ar -Heavy Duty
142-8666 Wheel & Tire Ar
252-0367 Wheel & Tire Ar -Solid
185-8665 Wheel & Tire Ar -Heavy Duty
252-0378 Wheel & Tire Ar -Solid
165-4898 Wheel & Tire Ar -Heavy Duty
252-0344 Wheel & Tire Ar
159-5761 Wheel & Tire Ar -Solid
252-0345 Wheel & Tire Ar
165-4891 Wheel & Tire Ar -Heavy Duty
185-8664 Wheel & Tire Ar -Heavy Duty
Service Equipment And Supplies
326-5251 Film Gp
356-1897 Film Gp -Two Speed
238-7734 Film Gp -Un
195-6740 Plate & Film Gp
326-5682 Plate & Film Gp
326-5686 Plate & Film Gp -International
32***86Plate & Film Group; -International1
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Work Tools
326-5700 Coupler Ar-Quick -Manual
326-5750 Coupler Ar-Quick -Hydraulic
360-1364 Coupler Gp-Quick -Hydraulic
36***64Coupler Group-Quick; -Hydraulic1
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360-1363 Coupler Gp-Quick -Mechanical
36***63Coupler Group-Quick; -Mechanical1
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215-3963 Cylinder & Link Gp-Coupler -Rh
21***63Cylinder & Link Group-Coupler; -Rh1
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215-3962 Cylinder & Link Gp-Coupler -Lh
21***62Cylinder & Link Group-Coupler; -Lh1
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258-2536 Handle & Pin Gp-Coupler -Rh
25***36Handle & Pin Group-Coupler; -Rh1
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258-2538 Handle & Pin Gp-Coupler -Lh
25***38Handle & Pin Group-Coupler; -Lh1
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319-9480 Kit-Roading Plate & Mounting -Bucket
31***80Kit-Roading Plate & Mounting; -Bucket1
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215-3957 Link Gp-Coupler
258-2537 Lock Gp-Quick Coupler -Lh
175-4238 Lock Gp-Quick Coupler -Mechanical
17***38Lock Group-Quick Coupler; -Mechanical1
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258-2535 Lock Gp-Quick Coupler -Rh

242B3 serial number reference

On the 242B3 the PIN plate sits on the left side at the rear of the machine, under the left support arm (2014-and-later machines may repeat a stamped PIN on the right side as well). The plate shows a 17-character PIN starting with the letters CAT; the last 8 characters are the classic serial number, made up of a 3-character prefix (model/plant code) followed by a 5-digit sequence number. Match the 3-letter prefix (SRS for the 242B3) against the model's known range, then use the sequence digits to place the unit within that production run.

PrefixIdentifies
SRS242B3 Skid Steer Loader, B Series 3

Frequently asked questions

What engine does the Cat 242B3 skid steer loader use?

The 242B3 runs a Cat C3.4 DIT, a 3.3-liter four-cylinder turbocharged diesel rated at 53 kW (71 hp) net and 56 kW (75 hp) gross at 2500 rpm. It replaced the lower-output engine in the earlier B Series 2 machine with a documented power and torque increase, and it meets Tier 4 Interim / EU Stage IIIA emissions requirements.

What is the operating weight of the Cat 242B3?

Operating weight runs about 3,180 kg (7,010 lb), varying with cab versus open canopy, counterweights and tire choice. Rated operating capacity is roughly 975 kg (2,150 lb) at 50% of a 1,950 kg (4,300 lb) tipping load, so actual figures shift slightly by configuration.

What replaced the Cat 242B3?

Caterpillar's D Series succeeded the B Series 3 lineup: the 242B3 was replaced by the 242D3, which carries a different Cat C3.3B turbocharged diesel engine rated around 55 kW (74 hp) and updated Tier 4 Final emissions control. The 242B3 itself followed the 242B and 242B Series 2 in the same frame-size class.

What 242B3 owners discuss

What's the most common reason a 242B3 loses drive or won't move, and is it always the hydrostatic pump?
Most "won't move" complaints on this machine trace back to something short of the drive pump itself: air trapped in the hydrostatic circuit after a fluid service, a park-brake or seat/seatbelt interlock that hasn't released, or a plugged suction strainer starving the charge pump. Actual drive pump or drive motor failure is less common and tends to show up gradually as weak power in one direction or a hot, noisy pump rather than a sudden total loss of movement. Techs work through the interlocks and filtration before condemning the pump. Because a park brake that won't release cleanly is a safety item, have your dealer verify brake release and interlock operation before the machine goes back into service.
Boom or bucket response feels slow, jerky, or the pump is loud - what's usually behind it?
Slow boom or bucket movement is most often tied to a low fluid level, a clogged hydraulic filter, or worn cylinder seals letting oil bypass internally rather than a pump problem. Jerky, hesitant movement right after a fluid change usually means air got into the system and needs to be bled out. A loud whine or growl from the pump is commonly linked to contaminated fluid or a restricted suction line rather than the pump itself failing. When only the auxiliary or attachment circuit won't engage while boom/bucket work fine, owners report the culprit is more often a lockout or interlock switch than the valve stack, so check switches and connectors before opening up the hydraulics.
What wear patterns show up first on a 242B3 given it runs on tires and chains rather than tracks?
On this wheeled platform, the equivalent of undercarriage wear centers on the drive chains, tires, and the loader-arm/bucket pin-and-bushing sets. The drive chains run in an oil-bath case and need correct tension and chain oil level; a whining or hissing chain-case noise is an early sign of low oil or a slack chain rather than a failing drive motor. Tires wear unevenly on machines that do a lot of counter-rotating turns on abrasive surfaces, so check tread depth, sidewall condition, and lug torque together, not tread alone. Play or clunking at the bucket and loader-arm pivots under load points to worn pin-and-bushing sets, which are treated as a routine wear item once a machine has real hours on it.
What engine does the 242B3 actually run, and are there any known quirks with it?
The 242B3 (B Series 3) is powered by Caterpillar's C3.4 DIT, a 3.3 L (201 cu in) four-cylinder turbocharged direct-injection diesel rated around 53 kW (71 hp) at 2500 rpm - reported as roughly a 25 percent power gain and 28 percent torque gain over the B Series 2 machine it replaced. Hard starting that gradually worsens, including needing the starting aid even in mild weather, is commonly linked to air getting into the fuel system or a dirty fuel filter rather than an internal engine fault. A handful of owners running C3.4 DIT-powered Cat skid steers, this model included, describe misfire and blue smoke once the engine is at operating temperature and revved past roughly 1600 rpm; in different cases this was traced to turbocharger or boost-sensor faults, so that symptom points to a turbo/sensor check first rather than a worn-out engine.
What electrical or sensor faults come up most on this machine?
The seat switch and seatbelt sensor are the most commonly cited electrical gremlins on this generation of Cat skid steer. The operator has to be seated, belted in, and have the lift/tilt lockout bar down before the machine will release the park brake and enable hydraulics; a fault or poor connection anywhere in that chain shows up as flashing park-brake and seatbelt warning lights and a machine that won't move or lift. Some configurations also route a cab door switch into the same circuit, so a door switch fault can mimic a seat or seatbelt fault. Most cases clear up with cleaning and testing the switches and connectors rather than replacing parts. Because this circuit governs park brake release, have your dealer verify correct interlock and brake operation after any repair to it.
Why does it keep stalling or getting hard to start even after a filter change?
Stalling and hard starting are most often traced to the fuel system: air in the lines, a dirty or water-contaminated filter, or a worn injector. At least one owner reported repeat failures of the fuel shut-off solenoid alongside a chafed, shorted wire at the ECM connector, so a stalling complaint that keeps returning after routine filter changes is worth tracing at the wiring harness and ECM connections, not just the fuel filter itself.
What should I check before buying a used 242B3?
Check tire condition, inflation, and lug torque, and inspect the drive chains along with chain-case oil level. Look for play in the bucket and loader-arm pin-and-bushing sets under load, since these are the first wear points to show hours. Cycle the boom and bucket through full travel watching for slow or jerky response, and run the auxiliary or high-flow circuit if the machine has one. Confirm the seat, seatbelt, and park-brake interlocks all function correctly with no warning lights staying on. Start the engine cold if possible and watch for excessive smoke, hard starting, or a rough idle, and ask for records on fuel filter and hydraulic fluid change intervals. As with any used machine, have your dealer verify brake and safety-interlock function before putting it to work.

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

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