The genuine XCMG 860505981 Shaft is a precision‑engineered rotating component designed for XCMG GR series motor graders. This OEM shaft serves as a critical link in auxiliary drive systems, including hydraulic pump drives, cooling fan drives, and power take‑off (PTO) assemblies. Manufactured from high‑strength alloy steel (42CrMo4) with induction‑hardened bearing journals and precision‑ground splines, the 860505981 shaft delivers reliable torque transmission under extreme loads and continuous operation.
The 860505981 shaft features a forged blank for superior grain flow, CNC‑machined surfaces, and carefully controlled heat treatment. The core hardness is 38–42 HRC, while the journals and splines are induction‑hardened to 55–60 HRC to resist wear and fretting. The shaft is dynamically balanced to ISO 1940 G6.3, ensuring vibration‑free operation up to 3,200 rpm.
Typical applications on XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, and GR2003 graders include the auxiliary drive shaft for the main hydraulic pump, the idler shaft for the fan drive, and the intermediate shaft in transfer cases. A twisted, cracked, or worn shaft will cause loss of hydraulic power, engine overheating, or complete drivetrain failure. Replacing a damaged shaft with genuine XCMG 860505981 restores original power flow and machine reliability.
| Parameter | Specification |
|---|---|
| OEM Number | 860505981 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Auxiliary / Drive Shaft (Precision Ground) |
| Overall Length | 345 mm (±0.3 mm) |
| Shaft Diameter (main body) | 35.00 mm h6 tolerance |
| Spline Type – Drive End | Involute spline, 20 teeth, module 1.5, 30° pressure angle |
| Spline Type – Pump End | Involute spline, 18 teeth, module 1.25, 30° pressure angle |
| Bearing Journal Diameters | 30.00 mm and 35.00 mm, both P6 tolerance |
| Material | Alloy steel (42CrMo4 / AISI 4140), forged blank |
| Core Hardness | 38–42 HRC (through‑hardened & tempered) |
| Surface Hardness (journals & splines) | 55–60 HRC (induction hardened, case depth 1.2–1.8 mm) |
| Dynamic Balance Grade | ISO 1940 G6.3 @ 3,200 rpm |
| Maximum Torque Capacity | 1,100 Nm (811 lb‑ft) continuous |
| Maximum Rotational Speed | 3,500 rpm |
| Surface Finish (journals) | Ra ≤0.4 μm (ground & superfinished) |
| Lubrication | Pressurized oil or grease (application dependent) |
| Standards Compliance | ISO 9001, XCMG Q/XCMG 1131-2023 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 860505500, 860505800, 860505950, 860505980 |
The 860505981 shaft is used to transfer power from the engine or transmission to auxiliary components such as the main hydraulic pump, fan drive, and charge pump.
Without this shaft, the hydraulic system would have no pressure, the engine would overheat (fan not turning), and the grader would be immobile.
The shaft is subjected to alternating torsional stresses and must resist fatigue. The induction‑hardened splines maintain precise engagement even under high torque, preventing backlash and wear.
Common failure modes include spline wear (due to insufficient lubrication), shaft bending from misaligned pump mounts, and fatigue cracking from torsional overload.
Replacing a worn shaft with genuine XCMG 860505981 restores full power transmission and eliminates drivetrain vibration or noise.
XCMG selects 42CrMo4 chromium‑molybdenum steel for its excellent hardenability and toughness. The shaft blank is hot‑forged to refine grain flow, then normalized to relieve stress.
CNC turning and spline hobbing are performed before heat treatment. The shaft is through‑hardened (850°C oil quench, 560°C temper) to 38–42 HRC core.
Induction hardening selectively heats the splines and journals to 900°C followed by rapid quench, achieving 55–60 HRC to a depth of 1.5 mm.
This dual‑hardness design provides a tough interior that absorbs shock loads and a hard exterior that resists wear and fretting.
After hardening, the journals are centerless ground to h6 tolerance and superfinished to Ra 0.2 μm for optimal seal and bearing life.
To replace the 860505981 shaft, first drain any oil from the housing and remove the pump/fan unit. Clean the housing bore and inspect bearings for wear.
Lubricate the splines and journal with clean oil. Slide the shaft into place, engaging the spline with the drive gear. Rotate slightly to align. Install retaining snap rings or bolts.
Check end‑play using a dial gauge – acceptable range is 0.05–0.15 mm. Adjust shims if needed. Tighten any retaining nut to the torque in the service manual (typically 150 Nm).
After reassembly, run the engine at idle and check for abnormal noise or vibration. If present, recheck alignment and shaft runout.
Keep spare 860505981 shafts in your parts store – a broken auxiliary shaft will immediately stop the hydraulic system and fan, causing rapid overheating.
Aftermarket shafts often use lower‑grade steel (e.g., C45) without induction hardening, leading to rapid spline wear after 500 hours.
Many have inaccurate spline geometry, causing pump coupler wear and generating metal contamination in the hydraulic system.
Counterfeit shafts may lack dynamic balancing, causing vibration that destroys bearings and seals. Genuine XCMG shafts are precision ground and balanced to G6.3.
XCMG provides a 12‑month warranty against manufacturing defects. Each shaft is magnetic particle inspected for cracks and certified.
Using OEM shafts prevents catastrophic failure that could damage the pump, fan hub, or transmission housing – the cost of a genuine shaft is minimal compared to that repair.
Symptoms: pump whining (cavitation) that disappears when the engine is slowed, fan wobble or vibration, hydraulic oil overheating, and metal particles in the oil filter.
Preventive replacement is recommended every 5,000 operating hours or during any major pump or fan drive overhaul.
Even if the shaft looks fine, micro‑cracks can develop from torsional fatigue. Replace it when the pump is removed for servicing – it’s cheap insurance.
Keep a stock of 860505981 shafts in your fleet warehouse. Proactive replacement eliminates unexpected breakdowns and expensive emergency repairs.
The XCMG 860505981 Shaft is stocked in regional centers: 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 delivery for urgent repairs.
Bulk orders of 5+ shafts receive volume discounts and can be shipped by sea freight. Each shaft is individually wrapped in VCI paper and foam‑lined box.
For large fleets, consignment stock programs ensure immediate availability. Technical datasheets and installation videos are available upon request.
Don’t risk hydraulic pump failure or engine overheating due to a broken auxiliary shaft. Order the genuine XCMG 860505981 Shaft today and ensure reliable power to every critical system on your motor grader.
Upgrade your grader’s drivetrain reliability with XCMG genuine shafts. Engineered for torsional strength, precise fit, and long service life. Use the buttons above to request a quote or email our parts specialists. Keep your XCMG grader running at peak performance – choose 860505981 OEM shaft.
