The genuine XCMG 860106313 Gear Pump is a high‑efficiency, positive displacement hydraulic pump manufactured for XCMG GR series motor graders. This OEM gear pump supplies pressurized oil to the main hydraulic system, powering blade lift cylinders, circle rotation motors, articulation joints, steering circuits, and brake accumulators on GR135, GR165, GR180, GR215, GR260, GR300, GR350, and GR2003 graders. Designed with precision‑ground gear pairs, ductile iron housing, and high‑load bearings, the 860106313 gear pump delivers consistent flow and pressure even under extreme variable load conditions. The pump is driven directly by the auxiliary drive shaft from the transmission, making it a critical component for all grader hydraulic functions.
The 860106313 pump features an external gear design with hardened, profile‑ground gears that minimize internal leakage and maximize volumetric efficiency (typically >92%). The pump body is made of high‑strength spheroidal graphite cast iron, providing excellent resistance to pressure spikes and cavitation. The drive shaft is supported by heavy‑duty tapered roller bearings, capable of sustained operation at pressures up to 25 MPa and speeds to 2,500 rpm. The pump is equipped with a rear cover incorporating a pressure relief valve (set at 23 MPa) and a suction strainer to protect internal components.
A worn or damaged gear pump will cause slow implement response, reduced steering assist, and increased cycle times for blade and circle movements. Replacing a failed pump with genuine XCMG 860106313 restores original flow rates, eliminates internal leakage, and ensures reliable machine operation. Keep this essential component in your parts inventory to avoid extended downtime during grading seasons.
| Parameter | Specification |
|---|---|
| OEM Number | 860106313 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | External Gear Pump – Main Hydraulic |
| Displacement | 40 cm³/rev (±3%) |
| Maximum Continuous Pressure | 23 MPa (230 bar / 3,335 psi) |
| Maximum Intermittent Pressure | 25 MPa (250 bar / 3,625 psi) |
| Rated Speed | 2,200 rpm |
| Maximum Speed | 2,800 rpm |
| Flow Rate (at 2,200 rpm, 23 MPa) | 88 L/min (23.2 US gal/min) |
| Volumetric Efficiency | ≥92% at rated pressure |
| Housing Material | Ductile iron (GGG40 / EN-GJS-400-15) |
| Gear Material | Case‑hardened alloy steel (20MnCr5), 58–62 HRC |
| Shaft Type | Involute splined, 18 teeth, module 1.5 |
| Bearing Type | Tapered roller bearings (pre‑loaded, heavy duty) |
| Mounting Flange | SAE A 2‑bolt, pilot diameter 82.5 mm |
| Inlet/Outlet Ports | G 1¼″ BSPP (inlet), G 1″ BSPP (outlet) |
| Relief Valve Setting | 23 MPa ±0.5 MPa (built‑in, adjustable) |
| Fluid Compatibility | Mineral oil (ISO VG 46/68), synthetic hydraulic fluids |
| Temperature Range (fluid) | -20°C to +90°C (-4°F to +194°F) continuous; 110°C peak |
| Filtration Requirement | ISO 4406 18/16/13 (β10 ≥100) |
| Standards | ISO 9001, XCMG Q/XCMG 1125-2023 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 860105001, 860105678, 860106010, 860106188 |
The 860106313 gear pump is the heart of the motor grader’s hydraulic system. It converts mechanical torque from the engine/transmission into hydraulic flow and pressure. This pressurized oil is then directed by control valves to blade lift cylinders, circle rotation motors, articulation cylinder, steering cylinders, and brake accumulators. Without adequate pump flow, all these functions become slow, weak, or inoperable.
On XCMG GR graders, this pump is usually mounted directly to the auxiliary drive pad of the transmission. It draws oil from the hydraulic tank through a suction strainer and delivers high‑pressure oil through the main pressure line. The built‑in relief valve protects the system from pressure spikes caused by sudden load changes, such as blade impact with rocks or frozen ground.
A gear pump’s performance degrades gradually due to wear of the gear teeth, bushings, and housing. Internal leakage increases, causing a drop in volumetric efficiency and slower implement response. When the pump wear exceeds 15% internal leakage, replacement with genuine XCMG 860106313 is necessary to restore factory cycle times and steering responsiveness.
XCMG manufactures the 860106313 gear pump using a highly controlled process. The gear teeth are firstly hobbing, then profile‑ground and case‑hardened to 60 HRC with a depth of 0.5–0.8 mm. The gear profiles are inspected using a CNC gear measuring center to ensure perfect meshing and minimal harmonic noise. The housing is machined from a single ductile iron casting, then stress‑relieved to prevent distortion.
The pump’s pressure plates are made of sintered bronze on steel backing, providing excellent anti‑wear properties and low friction. The drive shaft is supported by tapered roller bearings that are pre‑loaded during assembly to eliminate axial play. The shaft seal is a dual‑lip nitrile rubber type, capable of withstanding case pressure up to 2.5 MPa. Each pump is tested on a hydraulic dynamometer to verify flow, pressure, and noise levels.
XCMG’s quality regime includes endurance testing of random samples for 500 hours at maximum pressure and speed. After testing, the pump is disassembled and measured for wear – genuine 860106313 pumps show gear tooth wear less than 0.02 mm and no measurable housing bore wear. This ensures a service life of over 8,000 hours in typical grading applications.
Before installing a new 860106313 gear pump, thoroughly clean the mounting pad and ensure the drive spline is free of burrs. Replace the pump drive coupler if worn. Fill the pump with clean hydraulic oil through the inlet port before installation to prevent dry startup, which can damage the gears and bearings immediately.
Mount the pump using new O‑rings on the inlet and outlet ports. Torque the mounting bolts to 58 Nm (43 lb‑ft) in a crossing pattern. Connect the suction and pressure lines – ensure the suction line is at least 2× the diameter of the port to avoid cavitation. After installation, fill the hydraulic tank with recommended oil and run the engine at idle for 2 minutes while checking for leaks.
Operate all hydraulic functions through their full stroke several times to purge air from the system. Check the oil level and top up if necessary. Measure the pump case drain temperature after 30 minutes of operation – it should not exceed 80°C. Keep a spare 860106313 pump in your shop to minimize downtime during peak season.
Aftermarket gear pumps often use lower‑grade cast iron housings that crack under pressure spikes. Many have gears with poor tooth profiles, causing excessive noise (cavitation sound) and rapid wear. Genuine XCMG 860106313 uses ductile iron and precision‑ground gears for quiet, reliable operation. Aftermarket pumps frequently suffer from early seal failures and bearing collapse within 500 hours.
Counterfeit pumps may have incorrectly sized port threads or spline engagement, leading to leaks and drive damage. Some lack the internal pressure relief valve, relying on the system’s main relief which may not protect the pump adequately. Genuine XCMG pumps include a factory‑calibrated relief valve matched to the grader’s system specifications. Using OEM pumps prevents hydraulic system contamination from metal debris generated by cheap components.
XCMG provides a 12‑month unlimited‑hour warranty on manufacturing defects. Each genuine pump is serialized and comes with a test certificate. The cost of an aftermarket pump failure (including downtime, oil loss, and potential valve damage) far exceeds the price of an original XCMG unit. Always insist on genuine 860106313 for critical hydraulic power.
Typical symptoms of a failing gear pump: slow cylinder movement, reduced blade lift force, increased engine loading under no‑load conditions (due to internal leakage rising), excessive hydraulic noise (whining or knocking), and oil overheating. Also, if the pump case drain flow exceeds 10% of pump flow, internal wear is advanced.
Preventive replacement is recommended every 6,000 operating hours or during any major hydraulic system overhaul. The cost of a pump is minor compared to the labor of replacing it after catastrophic failure (which may also contaminate the entire system). During every 1,000‑hour service, check the pump’s case drain temperature with a thermal camera – a temperature rise of more than 20°C over the tank temperature indicates excessive internal friction.
Keep a stock of 860106313 pumps in your fleet warehouse. When replacing hydraulic hoses or valves, consider preemptively replacing aged pumps. Clean oil and proper filtration (10 μm absolute) are essential to maximize pump life. Use the recommended oil viscosity for your climate (ISO 46 for moderate, ISO 32 for cold, ISO 68 for hot).
The XCMG 860106313 Gear Pump is stocked in regional warehouses: Houston (USA), Rotterdam (Netherlands), Dubai (UAE), and Shanghai (China). Standard air freight delivers within 2–5 business days worldwide. Expedited courier (DHL/FedEx) provides 1–2 day shipping for emergency pump failures. Bulk orders of 3+ pumps receive volume discounts and can be shipped by sea freight.
Each pump is packaged in a heavy‑duty foam‑lined box, sealed in a moisture‑barrier bag with desiccant. For large fleets and mining operations, consignment stock programs ensure immediate pump availability. Our parts specialists provide technical support for pump selection and installation. Export documentation and customs clearance assistance are available for all international orders.
Don’t let a worn hydraulic pump cripple your grader’s productivity. Order the genuine XCMG 860106313 Gear Pump today and restore full hydraulic power to blade, circle, steering, and brake systems. This pump is the heart of your grader’s implement control – only OEM quality guarantees performance and longevity.
Upgrade your grader’s hydraulic reliability with XCMG genuine gear pumps. Engineered for high flow, low noise, and long service life. Use the buttons above to request a quote or email our parts specialists. Keep your XCMG grader operating at peak efficiency – choose 860106313 OEM.
