The 860140398 Starter Motor is a genuine XCMG high-torque starter designed for GR series motor graders. This powerful electric motor delivers reliable cranking power to start the diesel engine in all weather conditions. The 860140398 starter motor is manufactured with a heavy-duty solenoid, heat-treated pinion gear, and sealed bearings, offering exceptional durability and long service life. Used as original equipment on XCMG GR2003, GR215, GR300, and GR350 graders powered by XCMG XC6B or XC6D diesel engines, this starter directly replaces weak, failed, or damaged units, restoring fast, reliable engine starting. Each starter is 100% load-tested and inspected for solenoid operation, free-run current, and pinion throw.
The 860140398 Starter Motor features a four-pole wound-field design with a planetary gear reduction system, providing high cranking torque (up to 5.5 kW) with low current draw. Its sealed construction and corrosion-resistant coating protect against moisture, dust, and oil contamination. Replacing a worn starter with the genuine 860140398 part eliminates slow cranking, clicking solenoid, and no-start conditions. Each starter is supplied with new mounting bolts, washers, and a terminal cover. Whether you are troubleshooting a hard-start issue or performing a major engine overhaul, this genuine XCMG component ensures a perfect fit and long service life.
Every 860140398 starter motor is laser-etched with the XCMG part number and includes a specification card. The starter is packed in a heavy-duty cardboard box with foam inserts. Keep a spare starter in your parts inventory for emergency field replacements.
| Parameter | Specification |
|---|---|
| OEM Number | 860140398 |
| Product Name | Starter Motor (Cranking Motor) |
| Brand | XCMG (Genuine OEM) |
| Type | Planetary gear reduction, 4-pole series wound |
| Rated Power | 5.5 kW (7.4 HP) @ 24V |
| Nominal Voltage | 24V DC (also works on 12V systems with reduced power) |
| Current Draw (no load) | ≤ 100A @ 24V |
| Current Draw (stall) | ≤ 900A @ 24V |
| Torque (stall) | ≥ 50 N·m |
| Pinion Teeth | 11 teeth (module 2.5) |
| Mounting Flange | SAE #3 (2-bolt, 127 mm diagonal) |
| Solenoid Type | Integral, push-type, with built-in switch |
| Solenoid Pull-in Voltage | ≤ 18V @ 24V system |
| Pinion Drive | Overrunning clutch (roller type) |
| Operating Temperature | -40°C to +120°C |
| Duty Cycle | Intermittent, max 30 seconds cranking, 2 minutes rest |
| Weight | 12.8 kg (28.2 lbs) |
| Compatible Engines | XCMG XC6B, XC6D, Cummins 6BT5.9 |
| Standards | ISO 9001:2025, SAE J1171 (ignition protection) |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG starter motors are critical for reliable engine starting. Their high torque and durable construction outlast generic starters, ensuring your grader starts every time.
Aftermarket starters often use lower-grade windings, weak solenoids, or substandard clutches that fail prematurely. The genuine 860140398 Starter Motor from XCMG uses high-temperature magnet wire, a heavy-duty solenoid, and a precision-ground pinion gear. Independent tests show that OEM starters maintain cranking speed above 200 RPM for over 30,000 cycles, while generic starters drop below 150 RPM after 10,000 cycles. This reliability prevents no-start conditions and ensures your grader’s engine fires quickly even in extreme cold.
Each 860140398 starter motor is traceable to its production batch, with records of no-load current, stall torque, and solenoid pull-in voltage. The starter housing is stamped with the XCMG part number. XCMG’s quality control includes 100% load testing on a dynamometer, as well as thermal cycling and vibration testing. Only starters that meet all specifications are shipped, ensuring a perfect fit and long service life for your grader’s starting system.
Replacing the 860140398 starter motor requires basic hand tools. Disconnect the battery negative terminal. Raise the grader and support safely. Locate the starter on the engine block. Remove the electrical connections (battery cable and solenoid trigger wire). Unbolt the two mounting bolts (often M12). Remove the old starter. Clean the mounting flange and flywheel housing. Install the new starter with new bolts (included), torquing to 65 Nm. Reconnect the wires (battery cable to large terminal, trigger wire to small terminal). Reconnect battery and test start the engine. Check for proper pinion engagement and noise.
Inspect the 860140398 starter motor every 1,000 operating hours. Listen for grinding noises (pinion wear), slow cranking, or solenoid clicking without engagement. If the starter shows signs of failure, replace immediately. Keep a spare starter in your parts inventory for emergency field replacements. Always replace the starter mounting bolts and check the flywheel ring gear for damage when installing a new starter.
A 36-month field study on 25 XCMG GR2003 graders in a cold climate (Canada) compared genuine 860140398 starter motors against aftermarket units. Graders with OEM starters averaged 12,000 hours with zero starting failures, even at -35°C. Aftermarket starters failed at an average of 3,000 hours, with common failures including solenoid burnout, pinion breakage, and bearing seizure. The OEM starters also maintained cranking speed within 10% of new, while aftermarket units slowed by 30% after 2,000 hours. The total cost of ownership using genuine XCMG starters was 60% lower over three years due to reduced downtime and towing costs.
Laboratory tests confirmed that the 860140398 starter’s planetary gear reduction provides 40% more torque than direct-drive designs of the same size. The sealed solenoid and brush holder prevent corrosion from road salt and moisture. For graders operating in high-dust environments, the starter’s enclosed brush plate keeps carbon dust from interfering with commutation, extending brush life. The integral overrunning clutch protects the starter from flywheel kickback.
XCMG produces the 860140398 starter motor in an IATF 16949-certified facility using automated winding and assembly. The armature is dynamically balanced, and the commutator is diamond-turned for smooth brush contact. The field coils are vacuum-impregnated with epoxy to prevent vibration damage. The solenoid is assembled with silver-plated contacts for low resistance. Each starter is then tested on a computerized test stand that measures no-load current, stall torque, and solenoid pull-in voltage. Random samples are subjected to 50,000 cycle endurance testing on an engine simulator and thermal cycling from -40°C to +120°C.
All genuine 860140398 starters are individually packed in heavy-duty cardboard boxes with foam padding. Bulk orders of 5 starters 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 860140398 starter motor directly replaces original XCMG part numbers 860140395 and 860140396, as well as common cross-references such as Delco 39MT, Bosch 0001108042, and Mitsubishi M008T60471. It is fully compatible with GR series graders equipped with XCMG XC6B and XC6D diesel engines (6-cylinder, 5.9L to 6.7L). This starter is for 24V systems; for 12V applications, use part 860140399. Always confirm engine model and flywheel tooth count (121 teeth) before ordering.
When replacing a starter, also order new mounting bolts (part 860140400) and a new battery cable (860140401) if the original is corroded. XCMG recommends checking the flywheel ring gear for damage and replacing if worn. Keep a complete starter installation kit (860140402) in your parts warehouse for planned replacements. Provide your grader’s serial number and engine number when ordering to ensure correct starter orientation.
Investing in the genuine 860140398 starter motor reduces total operating costs by preventing starting failures that lead to downtime and towing. A single no-start incident can cost $500+ in lost production and service call fees. The OEM starter, priced competitively, eliminates that risk and provides three times the service life of aftermarket units. Fleet managers who switched to genuine XCMG starters reported a 98% reduction in starter-related breakdowns and a 50% increase in battery life due to consistent cranking speeds.
When you choose the authentic 860140398 starter motor, you support sustainable manufacturing. XCMG uses recyclable metals, lead-free solder, and low-energy winding processes. The starter’s long service life reduces waste compared to cheap starters that need replacement every 2,000 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 starts reliably in any weather with the original XCMG 860140398 Starter Motor – engineered for the most demanding starting applications.
