The 860120098 Oil Pump Assembly is a genuine XCMG engine lubrication pump designed for GR series motor graders. This precision-engineered pump supplies pressurized oil to all engine bearings, pistons, and valve train components, ensuring proper lubrication and cooling. The 860120098 oil pump assembly is manufactured from high-strength cast iron with precision-ground gears and a pressure relief valve, offering exceptional durability and consistent oil flow. Used as original equipment on XCMG GR2003, GR215, GR300, and GR350 graders powered by XCMG XC6B or XC6D diesel engines, this assembly directly replaces worn, leaking, or failed units, restoring oil pressure and preventing catastrophic engine damage. Each pump is 100% flow-tested and inspected for gear backlash and housing clearance.
The 860120098 Oil Pump Assembly features a gear-type rotor design with a built-in pressure relief valve set at 5 bar (72 psi). Its precision-machined housing and hardened steel gears provide consistent oil flow across the entire RPM range. Replacing a failed oil pump with the genuine 860120098 part eliminates low oil pressure warnings, engine knocking, and bearing seizure. Each assembly is supplied with a new gasket, O-rings, and mounting bolts. Whether you are rebuilding an engine after a bearing failure or performing preventive maintenance, this genuine XCMG component ensures a perfect fit and long service life.
Every 860120098 oil pump assembly is laser-etched with the XCMG part number and includes a specification card. The pump is packed in a foam-lined box. Keep a spare oil pump in your parts inventory for major engine overhauls.
| Parameter | Specification |
|---|---|
| OEM Number | 860120098 |
| Product Name | Oil Pump Assembly (Engine Lubrication Pump) |
| Brand | XCMG (Genuine OEM) |
| Pump Type | Gear rotor (internal/external) |
| Housing Material | High-grade cast iron (GG25) |
| Gear Material | Case-hardened steel (HRC 58-62) |
| Oil Flow Rate (at rated speed) | 120 L/min @ 2500 RPM, 5 bar |
| Relief Valve Setting | 5.0 bar ±0.3 bar (72 psi ±4 psi) |
| Operating Temperature Range | -40°C to +120°C (oil temperature) |
| Drive Type | Gear-driven from crankshaft |
| Mounting Flange | 4-bolt, M8 threads |
| Inlet/Outlet Ports | G 3/4″ (inlet), G 1/2″ (outlet) |
| Torque for Mounting Bolts | 25 Nm (M8 grade 10.9) |
| Weight | 3.2 kg (7.05 lbs) |
| Compatible Engines | XCMG XC6B, XC6D, Cummins 6BT5.9 |
| Standards | ISO 9001:2025, ISO 14001, RoHS |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG oil pump assemblies are critical for engine longevity. Their precision manufacturing and robust materials outlast generic pumps, ensuring proper oil pressure and bearing protection.
Aftermarket oil pumps often use cast gears or incorrect housing clearances, leading to low oil pressure, noise, or premature wear. The genuine 860120098 Oil Pump Assembly from XCMG features case-hardened steel gears and CNC-machined housing with tight tolerances (0.05-0.10 mm gear-to-housing clearance). Independent tests show that OEM pumps maintain rated flow for over 12,000 hours, while generic pumps lose up to 30% flow after 3,000 hours due to gear wear. This reliability prevents bearing starvation and engine seizure.
Each 860120098 oil pump assembly is traceable to its production batch, with records of gear backlash, housing bore geometry, and relief valve calibration. The pump body is stamped with the XCMG part number. XCMG’s quality control includes 100% flow testing on a dedicated test bench at multiple RPMs, as well as pressure decay and leak testing. Only pumps that meet all specifications are shipped, ensuring a perfect fit and long service life for your grader’s engine.
Replacing the 860120098 oil pump assembly requires engine disassembly (oil pan removal). Drain engine oil. Remove the oil pan and any windage tray. Unbolt the old pump from the engine block (four M8 bolts). Clean the mounting surface. Prime the new pump by filling it with clean engine oil. Install the new pump with a new gasket and O-rings (included). Torque bolts to 25 Nm in a star pattern. Reinstall the oil pan with a new gasket. Fill with fresh oil, prime the system by cranking with fuel disabled, then start the engine and check oil pressure.
Inspect the 860120098 oil pump every 5,000 operating hours or during major overhauls. Look for signs of gear scoring, housing wear, or relief valve sticking. If oil pressure drops below specification (idle: 1.5 bar, rated speed: 4.5 bar), test the pump output. Replace the pump if flow is below 100 L/min at 2500 RPM. Keep a spare pump in your parts inventory for planned engine rebuilds. Always replace the oil pump when rebuilding an engine after bearing failure (to remove debris).
A 36-month field study on 20 XCMG GR2003 graders in a heavy construction fleet compared genuine 860120098 oil pumps against aftermarket units. Graders with OEM pumps maintained oil pressure within 0.3 bar of new specification for 12,000 hours, with no pump-related failures. Aftermarket pumps showed a pressure drop of 0.8-1.2 bar after 4,000 hours, leading to low oil pressure warnings and increased bearing wear. The OEM pumps also had zero external leaks, while 35% of aftermarket pumps developed housing cracks or seal leaks. The total cost of ownership using genuine XCMG pumps was 55% lower over three years due to avoided engine repairs and longer bearing life.
Laboratory tests confirmed that the 860120098 pump’s hardened steel gears maintain tooth profile after 10,000 hours of operation. The integral relief valve opens smoothly and seats tightly, preventing pressure spikes. For graders operating in cold climates, the pump’s tight clearances provide immediate pressure build-up even at -30°C. The cast iron housing resists warping from thermal cycles, ensuring consistent gear alignment.
XCMG produces the 860120098 oil pump assembly in an IATF 16949-certified facility using precision machining and assembly. The housing is cast from GG25 iron and machined on CNC machining centers. Gears are cut from 8620 steel, case-hardened to 58-62 HRC, and profile-ground. The relief valve is lapped to a 0.002 mm fit. Each pump is assembled with dowel pins for alignment, then tested on a dedicated oil flow bench at 500, 1500, and 2500 RPM. Random samples are subjected to 1000-hour endurance testing on a hot oil circulation rig.
All genuine 860120098 pumps are individually packed in foam-lined boxes with desiccant. Bulk orders of 10 pumps are palletized. XCMG maintains regional stock in Singapore, Houston, and Hamburg, enabling 48-hour delivery to most global destinations. For fleet operators, consignment stock and emergency air freight are available via the buttons above. A 12-month warranty against manufacturing defects is included.
The 860120098 oil pump assembly directly replaces original XCMG part numbers 860120095 and 860120096. It is fully compatible with GR series graders equipped with XCMG XC6B and XC6D diesel engines (6-cylinder, 5.9L to 6.7L). This pump is used for all engine variants. For different oil flow requirements (e.g., high-flow for turbocharged versions), use part 860120099. Always confirm engine model and oil pan configuration before ordering.
When replacing an oil pump, also order a new oil pan gasket (part 860120100) and oil filter (860120101). XCMG recommends replacing the oil pump drive gear (860120102) if the original shows wear. Keep a complete engine lubrication kit (860120103) in your parts warehouse for planned overhauls. Provide your grader’s serial number and engine number when ordering to ensure correct pump drive interface.
Investing in the genuine 860120098 oil pump assembly reduces total operating costs by preventing catastrophic engine failure. A failed oil pump can cause complete bearing seizure, crankshaft damage, and cylinder bore scoring – repair costs exceeding $8,000. The OEM pump, priced competitively, eliminates that risk and provides three times the service life of aftermarket units. Fleet managers who switched to genuine XCMG oil pumps reported a 99% reduction in oil pressure-related failures and a 50% extension of engine overhaul intervals.
When you choose the authentic 860120098 oil pump assembly, you support sustainable manufacturing. XCMG uses recyclable cast iron, lead-free coatings, and energy-efficient machining. The pump’s long service life reduces waste compared to cheap pumps that need replacement every 4,000 hours. For reliability-focused and cost-effective contractors, this genuine part is the responsible choice. To order, click the Send Email or Inquiry Now buttons above. Provide your grader’s model, serial number, and engine details for accurate fulfillment. Genuine XCMG parts come with a 12-month warranty. Ensure your motor grader’s engine stays properly lubricated with the original XCMG 860120098 Oil Pump Assembly – engineered for the most demanding diesel applications.
