Caterpillarskid steer loader
Caterpillar 252B3
Maintenance schedule, common problems & OEM parts breakdown
The Caterpillar 252B3 is a radial-lift skid steer loader within the compact equipment class. It is powered by a Caterpillar C3.4 DIT 4-cylinder turbocharged diesel engine producing 71 hp (5/kW) to 74 hp (55 kW). The machine features a 2-speed hydrostatic transmission and a hydraulic system with a 20.3 gal/min (77 l/min) pump capacity. Standard configurations include 12x16.5 tires and a 7861 lb (3565 kg) operating weight, offering a rated operating capacity of 2650 lb (1202 kg).
The B3 series represents an evolution in the 252B lineage, integrating Tier 4 Interim emissions technology and refined hydraulic performance. This machine remains highly relevant in the used parts and secondary market due to its robust C3.4 DIT powertrain and standardized components like 100HS continuous roller chains. Its availability of reliable aftermarket and OEM replacement parts for the drivetrain and engine makes it a cost-effective choice for fleet operators managing older compact equipment inventories.
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 252B3 specifications
Engine
| Model | Caterpillar C3.4 DIT |
| Type | 4-cycle, liquid-cooled diesel |
| Displacement | 3.4 L (207.5 cu.in) |
| Cylinders | 4, in-line |
| Aspiration | Turbocharged |
| Rated Power | 71 hp (53 kW) |
| Maximum Power | 74 hp (55 kW) |
| Emissions Tier | Tier 4 Interim |
Weights
| Operating Weight | 7,860 lb (3,565 kg) to 7,861 lb (3,565 kg) |
| Shipping Weight | 7,145 lb (3,250 kg) |
Dimensions
| Width | 1830 mm (72 in) |
| Length (without bucket) | 2900 mm (114 in) |
| Length (bucket on ground) | 142.3 in. (3615 mm) |
| Height (operator cab) | 81.3 in. (2065 mm) |
| Height (boom raised) | 159.8 in. (4060 mm) |
| Wheelbase | 48.4 in. (1230 mm) |
| Ground Clearance | 7.7 in. (195 mm) |
| Tire Size | 12x16.5 |
Performance
| Rated Operating Capacity | 2,650 lb (1202 kg) |
| Tipping Load | 5,300 lb (2404 kg) |
| Bucket Breakout Force | 5,508 lb (2498 kg) |
| Boom Lifting Force | 5,063 lb (2296 kg) |
| Forward Speed (Low Range) | 7.4 mph (11.9 kph) |
| Forward Speed (High Range) | 11.1 mph (17.8 kph) |
| Reverse Speed (Low/High) | 7.4 mph (11.9 kph) / 11.1 mph (17.8 kph) |
| Hydraulic Pump Flow | 20.3 gpm (77 l/min) |
| System Relief Pressure | 230 bar (3,335 psi) |
Service capacities (summary)
| Fuel Tank Capacity | 23.8 gal (90.0 L) |
| Engine Oil Capacity | 9.0 L (9.5 qt) to 9.0 L (9.5 qt) — varies by configuration/series |
| Engine Coolant Capacity | 10.0 L (10.6 qt) |
| Hydraulic System Capacity | 14.0 gal (53.0 L) |
| Hydraulic Tank Capacity | 35.0 L (9.2 gal) |
| Chaincase Oil Capacity | 8.5 qt (8.0 L) to 2.1 gal (8.0 L) — varies by configuration/series |
Values vary by configuration, region, and serial range — confirm against your machine before planning transport or lifts.
252B3 fluids & capacities
| System | Capacity | Recommended fluid |
|---|---|---|
| Engine crankcase (with filter) | 9.0 L (2.4 US gal) | Cat DEO-ULS, SAE 10W-30, or 15W-40; API Service CE, CF-4, CG-4, CH-4 |
| Cooling system | 10.0 L (2.6 US gal) | Caterpillar Diesel Engine Antifreeze/Coolant |
| Fuel tank | 90.0 L (23.8 US gal) | |
| Hydraulic tank | 35.0 L (9.2 US gal) | Cat HYDO Advanced, Cat DEO, SAE 15W-4/40, or 5W-40 |
| Hydraulic system | 53.0 L (14.0 US gal) | Cat HYDO Advanced, Cat DEO, SAE 15W-40, or 5W-40 |
| Chain case | 8.0 L (2.1 US gal) | Cat DEO-ULS, SAE 15W-40, or 5W-40 |
| Grease |
Capacities are refill values from factory literature — always fill to the dipstick/sight gauge, not the number.
Caterpillar 252B3 maintenance schedule
| Service interval | Tasks |
|---|---|
| Every 10 h |
|
| Every 250 h |
|
| Every 500 h |
|
| Every 1,000 h |
|
| Every 2,000 h |
|
| Every 12,000 h |
|
Servicing the 252B3 beyond the schedule
Predictive Maintenance & Fluid Analysis
Utilize Cat S.O.S Services to monitor engine oil, hydraulic fluid, and coolant. Analyze samples for wear metals like iron or copper, and detect contaminants such as silicon from dirt ingestion or sodium from coolant leaks. Regular hydraulic fluid analysis tracks particle counts and oxidation levels to prevent pump failure. Monitoring these indicators allows for scheduled interventions before component damage occurs.
Corrective & Common Repairs
Monitor the 100HS continuous roller chains and sprocket sleeves for accelerated wear, especially in sandy or muddy environments. Inspect hydraulic hoses regularly for cracks, abrasion, or leaks to prevent system pressure loss. If the air cleaner restriction indicator activates, service the filter elements immediately. Ensure all axle pivot lubrication points are functional to prevent premature bearing failure.
Overhaul & Rebuild Points
Plan for engine valve lash and fuel injector timing adjustments using qualified mechanics. During major intervals, evaluate the turbocharger and structural integrity of the radial-lift boom. Inspect the 2-speed hydrostatic transmission and drive chain cases for proper lubrication. Comprehensive evaluations of major components should occur during PM4 intervals to determine the necessity of full powertrain or hydraulic pump rebuild.
Seasonal & Environment Servicing
In dusty or quarry environments, clean the radiator fins daily and check air filters more frequently. For cold weather operations, use SAE 10W-30 engine oil to ensure reliable starting at temperatures near 15°F (-9°C). During seasonal transitions, inspect all hydraulic lines for brittleness and verify the integrity of the cooling system, ensuring the Extended Life Coolant (ELC) remains effective.
252B3 fault codes & troubleshooting
| Code | Meaning | Likely cause | What to do |
|---|---|---|---|
| 110-0 | Engine Coolant Temperature — Above Normal | Low coolant level or thermostat failure | Inspect cooling system and refill coolant |
| 110-3 | Engine Coolant Temp Sensor — Voltage High | Open circuit or sensor failure | Check wiring and replace sensor if faulty |
| 174-3 | Engine Fuel Temperature — Voltage Above Normal | Open circuit in sensor wiring | Inspect harness and replace sensor if necessary |
| 190-8 | Engine Speed — Abnormal Frequency | Speed sensor air gap, sensor failure, or tone ring damage | Check sensor gap and test speed sensor/tone ring |
| 41-3 | 8-Volt DC Supply — Voltage Above Normal | Short to power on 8V reference circuit | Inspect sensors sharing the 8V supply and isolate fault |
| 41-4 | 8-Volt DC Supply — Voltage Below Normal | Short to ground on 8V reference circuit | Disconnect sensors one at a time to locate short |
| 2348-9 | SAE J1939 Data Link #2 — Abnormal Update Rate | CAN bus wiring damage or termination fault | Check CAN wiring and measure termination resistance |
| E360 | Engine Coolant Temperature — High | Low coolant, failed thermostat, or water pump issue | Diagnose cooling system; do not operate until resolved |
Codes and remedies are general guidance for this model family — always confirm with diagnostic tooling and your dealer before major repairs.
252B3 attachments & work tools
Buckets
Available in general purpose and dirt configurations with bolt-on edges. Sizes include 1371 mm (54 in), 1524 mm (60 in), 1676 mm (66 in), and 1829 mm (72 in).
Buckets - Specialized
Includes rubber fixed edge options for specific applications. One configuration is noted at 2.6 m (8.5 ft) with a skid steer coupler.
Work Tool Families
The machine supports a wide range of attachments including mulchers, brushcutters, rakes, trenchers, saws, grading and dozer blades, pallet forks, and backhoe attachments for digging.
Mounting & Coupler Systems
Uses a skid steer coupler system. The machine is equipped with a radial-lift loader boom.
Hydraulic Configuration
Standard flow configuration provides 22 GPM (83 L/min) at 3335 PSI (230 bar). High flow options are listed as N/A for this specific model.
Factory Configurations & Guarding
Features include a radiator guard and various undercarriage components like 100HS continuous roller chains. The machine is equipped with 12x16.5 tires.
All 252B3 assemblies by section
Every catalogued assembly group for the Caterpillar 252B3. Open an assembly to preview the parts inside — full OEM part numbers are available in Heavy Parts AI.
Air Inlet And Exhaust System
243-0405 Air Cleaner Gp
| 24***05 | Air Cleaner Group | 1 |
222-9812 Air Cleaner Gp
| 22***12 | Air Cleaner Group | 1 |
315-7769 Lines Gp-Air
| 31***69 | Lines Group-Air | 1 |
247-6317 Lines Gp-Air
| 24***17 | Lines Group-Air | 1 |
326-5376 Lines Gp-Air
| 32***76 | Lines Group-Air | 1 |
287-5323 Manifold Gp-Exhaust
| 28***23 | Manifold Group-Exhaust | 1 |
335-5750 Manifold Gp-Inlet
| 33***50 | Manifold Group-Inlet | 1 |
258-2462 Muffler & Mounting Gp
| 25***62 | Muffler & Mounting Group | 1 |
315-7768 Turbocharger Gp
| 31***68 | Turbocharger Group | 1 |
Basic Engine
323-2009 Accessory Gp-Engine
| 32***09 | Accessory Group-Engine | 1 |
292-4041 Bearing Gp-Main
| 29***41 | Bearing Group-Main | 1 |
315-8329 Camshaft Gp
| 31***29 | Camshaft Group | 1 |
287-4033 Connecting Rod Gp
| 28***33 | Tube Brace, Connecting Rod Group | 1 |
315-7762 Cover Gp-Valve Mechanism
| 31***62 | Cover Group-Valve Mechanism | 1 |
314-9860 Crankshaft Gp
| 31***60 | Crankshaft Group | 1 |
330-7633 Cylinder Block Gp
| 33***33 | Cylinder Block Group | 1 |
233-5500 Cylinder Head Gp
| 23***00 | Cylinder Head Group | 1 |
326-5368 Drain Gp-Engine Oil
| 32***68 | Drain Group-Engine Oil | 1 |
314-9861 Flywheel Gp
| 31***61 | Flywheel Group | 1 |
315-7766 Gear Gp-Front
| 31***66 | Gear Group-Front | 1 |
280-8407 Guard Gp-Belt
| 28***07 | Guard Group-Belt | 1 |
361-2874 Housing Gp-Flywheel
| 36***74 | Housing Group-Flywheel | 1 |
315-8336 Housing Gp-Front
| 31***36 | Housing Group-Front | 1 |
315-7761 Lifting Gp-Engine
| 31***61 | Lifting Group-Engine | 1 |
326-5329 Mounting Gp-Engine
| 32***29 | Mounting Group-Engine | 1 |
315-7765 Pan Gp-Oil
| 31***65 | Pan Group-Oil | 1 |
315-8348 Piston Gp
| 31***48 | Piston Group | 1 |
287-2983 Plug Gp-Engine
| 28***83 | Plug Group-Engine; -Cylinder Block, Rh | 1 |
287-2922 Plug Gp-Engine
| 28***22 | Plug Group-Engine; -Cylinder Block, Lh | 1 |
301-3396 Pulley Gp-Crankshaft
| 30***96 | Pulley Group-Crankshaft | 1 |
287-6114 Pulley Gp-Water Pump
| 28***14 | Pulley Group-Water Pump | 1 |
287-6138 V-Belt Gp
| 28***38 | V-Belt Group; -Water Pump | 1 |
235-5880 Valve Mechanism Gp
| 23***80 | Valve Mechanism Group | 1 |
Cooling System
361-2880 Cooler Gp-Engine Oil
| 36***80 | Cooler Group-Engine Oil | 1 |
292-4040 Drain Gp-Coolant
| 29***40 | Drain Group-Coolant | 1 |
235-5900 Lines Gp-Water
| 23***00 | Lines Group-Water | 1 |
218-0938 Mounting Gp-Rad & Oil Cooler
| 21***38 | Mounting Group-Rad & Oil Cooler | 1 |
287-6056 Pump Gp-Water
| 28***56 | Pump Group-Water | 1 |
335-9117 Pump Gp-Water
| 33***17 | Pump Group-Water | 1 |
221-9124 Radiator & Hyd Oil Cooler Gp
| 22***24 | Radiator & Hydraulic Oil Cooler Group | 1 |
218-0924 Radiator & Oil Cooler Mtg Gp
| 21***24 | Radiator & Oil Cooler Mtg Group | 1 |
Electrical And Starting System
315-8353 Alternator Gp-Charging
| 31***53 | Alternator Group-Charging | 1 |
105-2814 Alternator Gp-Charging
| 10***14 | Alternator Group-Charging | 1 |
328-2278 Battery & Wiring Gp
| 32***78 | Battery & Wiring Group | 1 |
328-2345 Electronics Gp-Machine
| 32***45 | Electronics Group-Machine | 1 |
235-5904 Glow Plug Gp
| 23***04 | Glow Plug Group | 1 |
218-0943 Heater Gp-Jacket Water
| 21***43 | Heater Group-Jacket Water | 1 |
218-0942 Heater Gp-Jacket Water
| 21***42 | Heater Group-Jacket Water | 1 |
234-7727 Lamp Gp-Flood
| 23***27 | Lamp Group-Flood; -Rear | 1 |
234-4328 Lamp Gp-Flood
| 23***28 | Lamp Group-Flood; -Front, Rear, Wide Range | 1 |
142-7503 Lamp Gp-Stop & Tail
| 14***03 | Lamp Group-Stop & Tail; -12-Volt | 1 |
328-2344 Lamp Gp-Stop & Tail -Rear
| 32***44 | Lamp Group-Stop & Tail; -Rear | 1 |
309-1325 Lamp Gp-Warning Beacon -Amber
| 30***25 | Lamp Group-Warning Beacon; -12-Volt, Amber | 1 |
216-4746 Lighting Gp-Flood -Rear
| 21***46 | Lighting Group-Flood; -Rear | 1 |
218-6425 Lighting Gp-Flood -Front
| 21***25 | Lighting Group-Flood; -Front | 1 |
258-4135 Relay Gp -Main Power
| 25***35 | Relay Group; -Main Power | 1 |
143-0539 Starting Motor Gp-Electric
| 14***39 | Starting Motor Group-Electric; -12-Volt | 1 |
287-6181 Starting Motor Gp-Electric
| 28***81 | Starting Motor Group-Electric | 1 |
300-1071 Switch Gp-Pressure
| 30***71 | Switch Group-Pressure; -Engine Oil | 1 |
328-2272 Wiring Gp-Cab
| 32***72 | Wiring Group-Cab | 1 |
328-2276 Wiring Gp-Engine
| 32***76 | Wiring Group-Engine | 1 |
328-2274 Wiring Gp-Machine
| 32***74 | Wiring Group-Machine | 1 |
328-2342 Wiring Gp-Machine -Demand Fan
| 32***42 | Wiring Group-Machine; -Demand Fan | 1 |
328-2335 Wiring Gp-Work Tool
| 32***35 | Wiring Group-Work Tool | 1 |
Engine Arrangement
326-5239 Engine Ar-Primary
| 32***39 | Engine Ar-Primary | 1 |
342-1219 Engine Ar-Primary
| 34***19 | Engine Ar-Primary | 1 |
326-5361 Installation Ar-Engine
| 32***61 | Installation Ar-Engine | 1 |
Frame And Body
218-5660 Bumper Gp -Rear
| 21***60 | Bumper Group; -Rear | 1 |
218-6016 Counterweight Gp
| 21***16 | Counterweight Group | 1 |
326-5609 Enclosure Gp-Engine
| 32***09 | Enclosure Group-Engine | 1 |
326-5729 Frame As-Lower
| 32***29 | Frame As-Lower | 1 |
326-5826 Frame As-Upper
| 32***26 | Frame As-Upper | 1 |
326-4793 Frame Gp-Loader
| 32***93 | Frame Group-Loader | 1 |
326-5452 Frame Gp-Machine
| 32***52 | Frame Group-Machine | 1 |
150-8621 Guide Gp-Lines
| 15***21 | Guide Group-Lines | 1 |
188-0147 Lifting Gp-Machine -4-Point
| 18***47 | Lifting Group-Machine; -4-Point | 1 |
218-5969 Lifting Gp-Machine -Single Point
| 21***69 | Lifting Group-Machine; -Single Point | 1 |
190-7994 Link As
| 19***94 | Link As | 1 |
Fuel System
218-5602 Control Gp-Governor
| 21***02 | Control Group-Governor | 1 |
315-8350 Lines Gp-Fuel Injection
| 31***50 | Lines Group-Fuel Injection | 1 |
326-5366 Lines Gp-Fuel Prm & Filter
| 32***66 | Lines Group-Fuel Prm & Filter | 1 |
315-8352 Pump Gp-Fuel Injection
| 31***52 | Pump Group-Fuel Injection | 1 |
258-3442 Pump Gp-Fuel Prm & Prim Filter -Water Separator
| 25***42 | Pump Group-Fuel Prm & Prim Filter; -Water Separator | 1 |
Hydraulic System
193-0447 Accumulator & Mtg Gp-Hydraulic
| 19***47 | Accumulator & Mtg Group-Hydraulic; -Work Tool | 1 |
149-0686 Accumulator Gp-Hydraulic -Charged
| 14***86 | Accumulator Group-Hydraulic; -Charged | 1 |
227-8807 Accumulator Gp-Hydraulic -Uncharged
| 22***07 | Accumulator Group-Hydraulic; -Uncharged | 1 |
179-7001 Adapter Gp-Oil Line
| 17***01 | Adapter Group-Oil Line; -Unit Injector Pump | 1 |
218-5899 Cylinder & Mtg Gp-Lift Arm
| 21***99 | Cylinder & Mtg Group-Lift Arm | 1 |
192-2640 Cylinder Gp-Hydraulic -Coupler
| 19***40 | Cylinder Group-Hydraulic; -Coupler | 1 |
297-8699 Cylinder Gp-Lift
| 29***99 | Cylinder Group-Lift | 1 |
295-6954 Cylinder Gp-Tilt -Lh
| 29***54 | Cylinder Group-Tilt; -Lh | 1 |
295-6953 Cylinder Gp-Tilt -Rh
| 29***53 | Cylinder Group-Tilt; -Rh | 1 |
326-5468 Hydraulic Ar -Without Work Tool Positioner
| 32***68 | Hydraulic Ar; -Without Work Tool Positioner | 1 |
326-5481 Hydraulic Ar -With Work Tool Positioner
| 32***81 | Hydraulic Ar; -With Work Tool Positioner | 1 |
326-5445 Hydraulic Ar
| 32***45 | Hydraulic Ar | 1 |
332-8541 Lines Gp-Coupler -With Manual Lowering Control
| 33***41 | Lines Group-Coupler; -With Manual Lowering Control | 1 |
218-5630 Lines Gp-Hydraulic Fan
| 21***30 | Lines Group-Hydraulic Fan | 1 |
218-6572 Lines Gp-Hydraulic Oil Cooler
| 21***72 | Lines Group-Hydraulic Oil Cooler, Indicator; Oil Level | 1 |
326-5677 Lines Gp-Lift Cylinder -With Work Tool Positioner
| 32***77 | Lines Group-Lift Cylinder; -With Work Tool Positioner | 1 |
332-7664 Lines Gp-Lift Cylinder
| 33***64 | Lines Group-Lift Cylinder | 1 |
218-5631 Lines Gp-Pilot -Direction, Speed
| 21***31 | Lines Group-Pilot; -Direction, Speed | 1 |
218-5632 Lines Gp-Pilot -Work Tool
| 21***32 | Lines Group-Pilot; -Work Tool | 1 |
356-1911 Lines Gp-Pump -Work Tool
| 35***11 | Lines Group-Pump; -Work Tool | 1 |
218-6170 Lines Gp-Tilt Cylinder
| 21***70 | Lines Group-Tilt Cylinder | 1 |
218-5712 Lines Gp-Tilt Cylinder -With Work Tool Positioner
| 21***12 | Lines Group-Tilt Cylinder; -With Work Tool Positioner | 1 |
218-5936 Lines Gp-Work Tool
| 21***36 | Lines Group-Work Tool | 1 |
223-8418 Manifold & Solenoid Gp-Control
| 22***18 | Manifold & Solenoid Group-Control; -Work Tool Positioner | 1 |
233-7128 Manifold Gp-Control -Quick Coupler
| 23***28 | Manifold Group-Control; -Quick Coupler | 1 |
258-2579 Motor & Mtg Gp-Hydraulic Fan
| 25***79 | Motor & Mtg Group-Hydraulic Fan | 1 |
295-7221 Motor & Mtg Gp-Hydraulic Fan
| 29***21 | Motor & Mtg Group-Hydraulic Fan | 1 |
356-1900 Motor Ar-Hydraulic Fan -Standard
| 35***00 | Motor Ar-Hydraulic Fan; -Standard | 1 |
356-1901 Motor Ar-Hydraulic Fan -Nacd
| 35***01 | Motor Ar-Hydraulic Fan; -Nacd | 1 |
307-3036 Motor Gp-Gear -Hydraulic Fan
| 30***36 | Motor Group-Gear; -Hydraulic Fan | 1 |
190-8084 Pump & Mtg Gp-Work Tool
| 19***84 | Pump & Mtg Group-Work Tool | 1 |
238-7642 Pump Gp-Gear -Work Tool
| 23***42 | Pump Group-Gear; -Work Tool | 1 |
326-5780 Tank & Mtg Gp-Hydraulic
| 32***80 | Tank & Mtg Group-Hydraulic | 1 |
326-5781 Tank Gp-Hydraulic
| 32***81 | Tank Group-Hydraulic | 1 |
218-6725 Valve & Mtg Gp-Control
| 21***25 | Valve & Mtg Group-Control | 1 |
336-1320 Valve Gp-Control
| 33***20 | Valve Group-Control; -Work Tool | 1 |
112-1817 Valve Gp-Manual
| 11***17 | Valve Group-Manual; -Ride Control-Hydraulic Lockout | 1 |
299-9119 Valve Gp-Pilot
| 29***19 | Valve Group-Pilot; -Work Tool | 1 |
343-0868 Valve Gp-Pilot
| 34***68 | Valve Group-Pilot; -Direction, Speed | 1 |
195-9700 Valve Gp-Solenoid -12-Volt
| 19***00 | Valve Group-Solenoid; -12-Volt-Work Tool | 1 |
Implements
218-5898 Arm As-Lift
| 21***98 | Arm As-Lift | 1 |
Lubrication System
361-3334 Filter Gp-Engine Oil
| 36***34 | Filter Group-Engine Oil | 1 |
287-5377 Lines Gp-Engine Oil
| 28***77 | Lines Group-Engine Oil | 1 |
235-5895 Pump Gp-Engine Oil
| 23***95 | Pump Group-Engine Oil | 1 |
287-5665 Valve Gp-Engine Oil Relief
| 28***65 | Valve Group-Engine Oil Relief | 1 |
Machine Arrangement
326-4786 Chassis Ar
| 32***86 | Chassis Ar | 1 |
326-5422 Common Ar
| 32***22 | Common Ar | 1 |
326-5278 Control Ar-Machine -Aux Proportional Flow, 2-Speed
| 32***78 | Control Ar-Machine; -Auxiliary Proportional Flow, 2-Speed | 1 |
326-5276 Control Ar-Machine -On, Off Auxiliary Control, 1-Speed
| 32***76 | Control Ar-Machine; -On, Off Auxiliary Control, 1-Speed | 1 |
326-5277 Control Ar-Machine -Aux Proportional Flow, 1-Speed
| 32***77 | Control Ar-Machine; -Auxiliary Proportional Flow, 1-Speed | 1 |
326-5428 Control Ar-Machine -Aux Proportional Flow, 2-Speed
| 32***28 | Control Ar-Machine; -Auxiliary Proportional Flow, 2-Speed | 1 |
326-5427 Control Ar-Machine -Aux Proportional Flow, 1-Speed
| 32***27 | Control Ar-Machine; -Auxiliary Proportional Flow, 1-Speed | 1 |
Operator Station
186-6190 Accumulator Gp-Refrigerant -Charged
| 18***90 | Accumulator Group-Refrigerant; -With Desiccant | 1 |
176-3900 Accumulator Gp-Refrigerant -Uncharged
| 17***00 | Accumulator Group-Refrigerant; -With Desiccant | 1 |
326-5518 Air Conditioner Ar
| 32***18 | Air Conditioner Ar | 1 |
218-6405 Air Conditioner Gp
| 21***05 | Air Conditioner Group | 1 |
218-6404 Air Conditioner Gp
| 21***04 | Air Conditioner Group | 1 |
320-1389 Arm Gp-Window Wiper
| 32***89 | Arm Group-Window Wiper | 1 |
236-4830 Armrest & Mounting Gp
| 23***30 | Armrest & Mounting Group | 1 |
236-4833 Armrest Gp
| 23***33 | Armrest Group | 1 |
218-6420 Box Gp-Storage -Literature
| 21***20 | Box Group-Storage; -Literature | 1 |
216-6146 Box Gp-Storage
| 21***46 | Box Group-Storage | 1 |
326-5400 Cab Ar
| 32***00 | Cab Ar | 1 |
326-5517 Cab Ar-Enclosed Rops -Mech Susp Seat & A/C
| 32***17 | Cab Ar-Enclosed Rops; -Mech Susp Seat & A/C | 1 |
326-5512 Cab Ar-Enclosed Rops
| 32***12 | Cab Ar-Enclosed Rops | 1 |
326-5510 Cab Ar-Open Rops
| 32***10 | Cab Ar-Open Rops | 1 |
326-5511 Cab Ar-Open Rops -Mech Susp Seat
| 32***11 | Cab Ar-Open Rops; -Mech Susp Seat | 1 |
326-5404 Cab As
| 32***04 | Cab As | 1 |
326-5401 Cab Gp-Enclosed Rops
| 32***01 | Cab Group-Enclosed Rops | 1 |
258-2468 Compressor & Mtg Gp-Refrig
| 25***68 | Compressor & Mtg Group-Refrig | 1 |
218-6148 Condenser & Mtg Gp-Refrigerant
| 21***48 | Condenser & Mtg Group-Refrigerant | 1 |
218-6485 Control Gp-Handle -Direction, Speed
| 21***85 | Control Group-Handle; -Direction, Speed | 1 |
231-4256 Control Gp-Handle -Lh
| 23***56 | Control Group-Handle; -Lh | 1 |
231-4258 Control Gp-Handle -Lh
| 23***58 | Control Group-Handle; -Lh | 1 |
218-6490 Control Gp-Handle -Work Tool
| 21***90 | Control Group-Handle; -Work Tool | 1 |
231-4260 Control Gp-Handle -Rh
| 23***60 | Control Group-Handle; -Rh | 1 |
326-5264 Control Gp-Pilot Operated Hyd -Work Tool
| 32***64 | Control Group-Pilot Operated Hydraulic; -Work Tool | 1 |
326-5265 Control Gp-Pilot Operated Hyd -Auxiliary
| 32***65 | Control Group-Pilot Operated Hydraulic; -Auxiliary | 1 |
343-5542 Control Gp-Pilot Operated Hyd
| 34***42 | Control Group-Pilot Operated Hydraulic | 1 |
343-5543 Control Gp-Pilot Operated Hyd
| 34***43 | Control Group-Pilot Operated Hydraulic | 1 |
326-5267 Control Gp-Pilot Operated Hyd -Hydrostatic
| 32***67 | Control Group-Pilot Operated Hydraulic; -Hydrostatic | 1 |
218-6419 Cover Gp-Console -Without Air Conditioner, Heater
| 21***19 | Cover Group-Console; -Without Air Conditioner, Heater | 1 |
218-6418 Cover Gp-Console -With Air Conditioner, Heater
| 21***18 | Cover Group-Console; -With Air Conditioner, Heater | 1 |
218-6440 Door & Mtg Gp-Cab -Polycarbonate
| 21***40 | Door & Mtg Group-Cab; -Polycarbonate | 1 |
223-0600 Door & Mtg Gp-Cab -Glass
| 22***00 | Door & Mtg Group-Cab; -Glass | 1 |
218-6431 Door Gp-Cab -Glass
| 21***31 | Door Group-Cab; -Glass | 1 |
223-0616 Door Gp-Cab -Glass
| 22***16 | Door Group-Cab; -Glass | 1 |
276-3440 Door Gp-Cab -Polycarbonate
| 27***40 | Door Group-Cab; -Polycarbonate | 1 |
276-3615 Door Gp-Cab -Polycarbonate
| 27***15 | Door Group-Cab; -Polycarbonate | 1 |
218-6394 Duct Gp-Cab Air
| 21***94 | Duct Group-Cab Air | 1 |
231-7325 Frame Gp-Window -Rh
| 23***25 | Frame Group-Window; -Rh | 1 |
231-7327 Frame Gp-Window -Lh
| 23***27 | Frame Group-Window; -Lh | 1 |
233-5632 Guard Gp-Rops/Fops
| 23***32 | Guard Group-Rops/Fops | 1 |
218-6400 Handhold Gp
| 21***00 | Handhold Group | 1 |
218-6118 Handle Gp-Modular
| 21***18 | Handle Group-Modular | 1 |
218-6392 Heater & Mtg Gp-Cab
| 21***92 | Heater & Mtg Group-Cab | 1 |
326-5515 Heater Ar-Cab
| 32***15 | Heater Ar-Cab | 1 |
218-6393 Heater Gp-Cab
| 21***93 | Heater Group-Cab | 1 |
231-8122 Housing As-Side -Air Conditioner, Heater
| 23***22 | Housing As-Side; -Air Conditioner, Heater | 1 |
326-5514 Installation Gp-Cover & Lines -Without A/C, Heater
| 32***14 | Installation Group-Cover & Lines; -Without A/C, Heater | 1 |
234-0774 Lever Gp-Governor
| 23***74 | Lever Group-Governor | 1 |
326-5406 Liner Gp-Cab
| 32***06 | Liner Group-Cab | 1 |
142-9311 Liner-Cab -Gray
| 14***11 | Liner-Cab; -Gray | 1 |
326-5381 Lines Gp-Air Conditioner
| 32***81 | Lines Group-Air Conditioner | 1 |
218-5619 Lines Gp-Heater
| 21***19 | Lines Group-Heater | 1 |
258-4230 Mirror Gp-Rear View
| 25***30 | Mirror Group-Rear View | 1 |
223-6537 Module Gp-Warning Indicator
| 22***37 | Module Group-Warning Indicator | 1 |
249-2910 Module Gp-Warning Indicator
| 24***10 | Module Group-Warning Indicator | 1 |
330-5012 Motor Gp-Window Wiper
| 33***12 | Motor Group-Window Wiper | 1 |
218-6370 Mounting Gp-Rops
| 21***70 | Mounting Group-Rops | 1 |
328-2270 Panel Gp-Instrument
| 32***70 | Panel Group-Instrument | 1 |
218-6429 Panel Gp-Side
| 21***29 | Panel Group-Side | 1 |
327-8939 Pedal Gp-Governor
| 32***39 | Pedal Group-Governor | 1 |
325-8382 Pedal Gp-Governor
| 32***82 | Pedal Group-Governor | 1 |
326-5572 Platform Gp-Operator
| 32***72 | Platform Group-Operator | 1 |
218-6406 Seal Gp-Cab
| 21***06 | Seal Group-Cab | 1 |
276-6020 Seat Belt Gp
| 27***20 | Seat Belt Group | 1 |
276-7276 Seat Belt Gp
| 27***76 | Seat Belt Group; -Suspension | 1 |
276-7277 Seat Belt Gp
| 27***77 | Seat Belt Group | 1 |
276-6019 Seat Belt Gp
| 27***19 | Seat Belt Group | 1 |
218-5562 Seat Gp -Static
| 21***62 | Seat Group; -Static | 1 |
142-9305 Seat Gp -Suspension
| 14***05 | Seat Group; -Suspension | 1 |
219-4380 Seat Gp-Adjustable
| 21***80 | Seat Group-Adjustable | 1 |
218-6380 Spring Gp-Gas -Cab, Door
| 21***80 | Spring Group-Gas; -Cab, Door | 1 |
195-6723 Window Gp-Cab
| 19***23 | Window Group-Cab; -Rear | 1 |
224-7058 Window Gp-Cab -Upper, Rh
| 22***58 | Window Group-Cab; -Upper, Rh | 1 |
224-7057 Window Gp-Cab -Upper,Lh
| 22***57 | Window Group-Cab; -Upper,Lh | 1 |
218-6411 Window Gp-Cab -Side
| 21***11 | Window Group-Cab; -Side | 1 |
Power Train
142-9058 Axle Gp
| 14***58 | Axle Group | 1 |
261-6275 Axle Gp
| 26***75 | Axle Group | 1 |
191-9760 Drive Gp-Tandem
| 19***60 | Drive Group-Tandem | 1 |
356-1917 Filter & Lines Gp-Hydraulic
| 35***17 | Filter & Lines Group-Hydraulic | 1 |
223-9974 Filter Gp-Oil -Hydraulic
| 22***74 | Filter Group-Oil; -Hydraulic | 1 |
218-5621 Lines Gp-Hydrostatic
| 21***21 | Lines Group-Hydrostatic | 1 |
218-5635 Manifold & Lines Gp-Control -Parking Brake
| 21***35 | Manifold & Lines Group-Control; -Parking Brake | 1 |
218-5636 Manifold & Lines Gp-Control -Parking Brake, 2-Speed
| 21***36 | Manifold & Lines Group-Control; -Parking Brake, 2-Speed | 1 |
233-7131 Manifold & Solenoid Gp-Control -Parking Brake
| 23***31 | Manifold & Solenoid Group-Control; -Parking Brake | 1 |
293-6591 Manifold & Solenoid Gp-Control -Parking Brake, 2-Speed
| 29***91 | Manifold & Solenoid Group-Control; -Parking Brake, 2-Speed | 1 |
308-0421 Manifold Gp-Return
| 30***21 | Sealing Washer, Manifold Group-Return | 1 |
191-9780 Motor & Mtg Gp-Hydrostatic
| 19***80 | Motor & Mtg Group-Hydrostatic | 1 |
190-7457 Motor & Mtg Gp-Hydrostatic
| 19***57 | Motor & Mtg Group-Hydrostatic; -2-Speed | 1 |
280-7856 Motor Gp-Piston -Hydrostatic
| 28***56 | Motor Group-Piston; -Hydrostatic | 1 |
280-7858 Motor Gp-Piston -Hydrostatic
| 28***58 | Motor Group-Piston; -Hydrostatic | 1 |
218-0918 Mounting Gp-Pump
| 21***18 | Mounting Group-Pump | 1 |
326-5248 Powertrain Ar
| 32***48 | Powertrain Ar | 1 |
218-0928 Pump & Mtg Gp-Hydrostatic
| 21***28 | Pump & Mtg Group-Hydrostatic | 1 |
218-5928 Pump & Mtg Gp-Hydrostatic
| 21***28 | Pump & Mtg Group-Hydrostatic | 1 |
307-3068 Pump Gp-Piston
| 30***68 | Pump Group-Piston | 1 |
307-3070 Pump Gp-Piston
| 30***70 | Pump Group-Piston | 1 |
265-2899 Tire & Rim Gp -Rh
| 26***99 | Tire & Rim Group; -Rh | 1 |
165-4902 Tire & Rim Gp -Heavy-Duty, Rh
| 16***02 | Tire & Rim Group; -Heavy-Duty, Rh | 1 |
185-8674 Tire & Rim Gp -Lh
| 18***74 | Tire & Rim Group; -Lh | 1 |
188-0125 Tire & Rim Gp -Rh
| 18***25 | Tire & Rim Group; -Rh | 1 |
185-8676 Tire & Rim Gp -Lh
| 18***76 | Tire & Rim Group; -Lh | 1 |
188-0124 Tire & Rim Gp -Lh
| 18***24 | Tire & Rim Group; -Lh | 1 |
185-9931 Tire & Rim Gp -Rh
| 18***31 | Tire & Rim Group; -Rh | 1 |
265-2900 Tire & Rim Gp -Lh
| 26***00 | Tire & Rim Group; -Lh | 1 |
165-4901 Tire & Rim Gp -Heavy-Duty, Lh
| 16***01 | Tire & Rim Group; -Heavy-Duty, Lh | 1 |
185-9929 Tire & Rim Gp -Rh
| 18***29 | Tire & Rim Group; -Rh | 1 |
265-2898 Tire & Rim Gp -Lh
| 26***98 | Tire & Rim Group; -Lh | 1 |
199-5438 Tire & Rim Gp -Lh
| 19***38 | Tire & Rim Group; -Lh | 1 |
199-5439 Tire & Rim Gp -Rh
| 19***39 | Tire & Rim Group; -Rh | 1 |
185-9930 Tire & Rim Gp -Lh
| 18***30 | Tire & Rim Group; -Lh | 1 |
185-8677 Tire & Rim Gp -Rh
| 18***77 | Tire & Rim Group; -Rh | 1 |
165-4906 Tire & Rim Gp -Heavy-Duty, Lh
| 16***06 | Tire & Rim Group; -Heavy-Duty, Lh | 1 |
185-8675 Tire & Rim Gp -Rh
| 18***75 | Tire & Rim Group; -Rh | 1 |
265-2901 Tire & Rim Gp -Rh
| 26***01 | Tire & Rim Group; -Rh | 1 |
185-9928 Tire & Rim Gp -Lh
| 18***28 | Tire & Rim Group; -Lh | 1 |
165-4907 Tire & Rim Gp -Heavy-Duty, Rh
| 16***07 | Tire & Rim Group; -Heavy-Duty, Rh | 1 |
295-1799 Valve Gp-Relief
| 29***99 | Valve Group-Relief; -Main | 1 |
259-8194 Valve Gp-Solenoid -Parking Brake
| 25***94 | Valve Group-Solenoid; -Parking Brake | 1 |
252-0366 Wheel & Tire Ar -Solid
| 25***66 | Wheel & Tire Ar; -Solid | 1 |
252-0377 Wheel & Tire Ar -Solid
| 25***77 | Wheel & Tire Ar; -Solid | 1 |
187-3239 Wheel & Tire Ar
| 18***39 | Wheel & Tire Ar | 1 |
252-0346 Wheel & Tire Ar
| 25***46 | Wheel & Tire Ar | 1 |
185-8662 Wheel & Tire Ar -Low Side Wall
| 18***62 | Wheel & Tire Ar; -Low Side Wall | 1 |
185-8663 Wheel & Tire Ar -Low Side Wall
| 18***63 | Wheel & Tire Ar; -Low Side Wall | 1 |
165-4903 Wheel & Tire Ar -Heavy Duty
| 16***03 | Wheel & Tire Ar; -Heavy Duty | 1 |
178-2256 Wheel & Tire Ar -Heavy Duty
| 17***56 | Wheel & Tire Ar; -Heavy Duty | 1 |
185-8667 Wheel & Tire Ar -Heavy Duty
| 18***67 | Wheel & Tire Ar; -Heavy Duty | 1 |
252-0347 Wheel & Tire Ar
| 25***47 | Wheel & Tire Ar | 1 |
159-5761 Wheel & Tire Ar -Solid
| 15***61 | Wheel & Tire Ar; -Solid | 1 |
165-4898 Wheel & Tire Ar -Heavy Duty
| 16***98 | Wheel & Tire Ar; -Heavy Duty | 1 |
185-8666 Wheel & Tire Ar -Heavy Duty
| 18***66 | Wheel & Tire Ar; -Heavy Duty | 1 |
Service Equipment And Supplies
356-1894 Film Gp
| 35***94 | Film Group | 1 |
356-1897 Film Gp -Two Speed
| 35***97 | Film Group; -Two Speed | 1 |
238-7734 Film Gp -Un
| 23***34 | Film Group; -Un | 1 |
326-5682 Plate & Film Gp
| 32***82 | Plate & Film Group | 1 |
326-5686 Plate & Film Gp -International
| 32***86 | Plate & Film Group; -International | 1 |
195-6740 Plate & Film Gp
| 19***40 | Plate & Film Group | 1 |
Work Tools
326-5569 Coupler Ar-Quick -Manual
| 32***69 | Coupler Ar-Quick; -Manual | 1 |
326-5579 Coupler Ar-Quick -Hydraulic
| 32***79 | Coupler Ar-Quick; -Hydraulic | 1 |
196-8870 Coupler Gp-Quick
| 19***70 | Coupler Group-Quick | 1 |
192-2655 Coupler Gp-Quick
| 19***55 | Coupler Group-Quick; -Hydraulic | 1 |
215-3962 Cylinder & Link Gp-Coupler -Lh
| 21***62 | Cylinder & Link Group-Coupler; -Lh | 1 |
215-3963 Cylinder & Link Gp-Coupler -Rh
| 21***63 | Cylinder & Link Group-Coupler; -Rh | 1 |
258-2538 Handle & Pin Gp-Coupler -Lh
| 25***38 | Handle & Pin Group-Coupler; -Lh | 1 |
258-2536 Handle & Pin Gp-Coupler -Rh
| 25***36 | Handle & Pin Group-Coupler; -Rh | 1 |
215-3957 Link Gp-Coupler
| 21***57 | Link Group-Coupler | 1 |
258-2535 Lock Gp-Quick Coupler -Rh
| 25***35 | Lock Group-Quick Coupler; -Rh | 1 |
258-2537 Lock Gp-Quick Coupler -Lh
| 25***37 | Lock Group-Quick Coupler; -Lh | 1 |
252B3 serial number reference
The PIN plate is a durable metal identification plate usually riveted to the machine frame. To read it, identify the first three alphanumeric characters as the prefix and the following five digits as the sequence ID. For the 252B3, valid prefixes are TNK (all serials) and SCP (06188 and up).
| Prefix | Identifies | Notes |
|---|---|---|
| TNK | 252B3 | Covers TNK00001 and up. This prefix is specific to the 252B3 configuration and is distinct from the 252B/252B2 series. |
| SCP | 252B3 | Covers SCP06188 and up. This range applies to the 252B3 (and 252B2). Serials SCP00001 to SCP04600 are for 252B/252B2 only and do not apply to the 252B3. |
Frequently asked questions
What engine is used in the Caterpillar 252B3?
The machine is equipped with a Caterpillar C3.4 DIT, a 4-cycle, liquid-cooled, 4-cylinder turbocharged diesel engine with a displacement of 207.5 cu.in (3.4L).
What is the operating weight of this loader?
The standard operating weight for the Caterpillar 252B3 is 7861 lb (3565 kg).
What model replaced the 252B3?
Information regarding a direct successor to the 252B3 is not documented in the provided technical specifications.
What 252B3 owners discuss
What are the common causes of engine power loss or unexpected stalling on the 252B3?
Loss of power can result from a plugged air cleaner, clogged injection nozzles, incorrect fuel injection pressure, or worn piston rings. Unexpected stalling during operation is often linked to clogged fuel filter elements, air in the fuel lines, or dirty/defective injectors. If the engine stops specifically when idling, check for incorrect low idle speed adjustment, excessive valve clearance, or a damaged fuel injection pump. Have your dealer verify fuel injection timing and injector health.
What should be monitored regarding the hydraulic system performance?
Slow movement in lift arms or buckets may indicate a defective hydraulic pump, leaking cylinder piston seals, or insufficient hydraulic fluid levels. If the system overheats, check for a clogged hydraulic oil filter, a plugged hydraulic oil cooler, or an improperly adjusted main relief valve. For noisy operation, inspect for air in the hydraulic system or a dirty suction line. Ensure hydraulic pressure is adjusted correctly to the factory specification of 3-335 psi (230 bar).
What are the typical wear patterns and maintenance requirements for the undercarriage and drive system?
Operating in muddy or sandy conditions causes accelerated wear on sprocket sleeves and other undercarriage components; daily cleaning is required to maximize life. Inspect sprocket sleeves regularly to ensure they meet minimum thickness and rotate freely. For the drive system, check for malfunctions in the drive chain or input drive shaft. The 252B3 uses 100HS continuous roller chains and should have the drive chain case oil changed every 1000 hours.
What are the known electrical issues and battery maintenance needs?
Common electrical failures include loose or corroded wire connections, faulty battery terminal clamps, and defective starter motors. If the battery fails to charge, inspect for a loose or defective belt or a defective alternator. Low battery voltage can also cause the starter to turn slowly. Ensure all electrical wiring connections are clean and tight.
What engine-specific maintenance is required for the C3.4 DIT engine?
The 252B3 uses a Cat C3.4 DIT four-cylinder turbocharged diesel engine. Maintenance includes checking the air cleaner dust valve every 10 service hours or daily to remove debris. Engine valve lash and fuel injector timing adjustments require special tools and training; have your dealer verify these adjustments. For cold weather operation, use SAE 10W-30 oil if temperatures drop below 15°F (-9.4°C).
What should be checked when buying a used Caterpillar 252B3?
Verify the exact serial-prefix specification sheet and installed attachment package, as configurations can change weight and reach. Inspect the engine for signs of overheating or low oil pressure. Check the hydraulic system for leaks, particularly at cylinder rods or tubes. Examine the undercarriage for sprocket sleeve wear and ensure the drive chain case oil is clean. Confirm the machine's service history regarding hydraulic fluid changes and air filter replacements.
Compiled from owner and technician discussions across the industry — experiences vary by serial range and machine history.
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