The 860166036 Crankshaft Assembly is a genuine XCMG engine component designed for GR series motor graders powered by XCMG diesel engines. This precision-forged crankshaft converts linear piston motion into rotational torque to drive the grader’s transmission, hydraulic pumps, and auxiliary systems. The 860166036 crankshaft assembly is manufactured from high-strength micro-alloyed steel with induction-hardened journals, offering exceptional fatigue resistance and wear life. It includes the crankshaft gear, keyway, and factory-balanced counterweights. Used as original equipment on XCMG GR2003, GR215, GR300, and GR350 graders, this crankshaft directly replaces worn, cracked, or damaged units, restoring engine performance and reliability. Each assembly is 100% magnetic particle inspected and dynamically balanced.
The 860166036 Crankshaft Assembly features six induction-hardened main bearing journals and six connecting rod journals (for inline 6-cylinder engines), ground to precise tolerances (ISO 6 grade). The crankshaft is forged from 42CrMo4 steel, nitrided for surface hardness (HRC 55-60) and fillet-rolled for additional fatigue strength. Replacing a failed crankshaft with the genuine 860166036 part ensures proper bearing clearance, vibration balance, and engine timing, preventing catastrophic engine failure. Each assembly is supplied with a new woodruff key and protective end caps.
Every 860166036 crankshaft assembly is laser-engraved with the XCMG part number, serial number, and engine model compatibility (e.g., XC6B, XC6D). The assembly is packed in a heavy-duty wooden crate with foam inserts and anti-rust coating. Whether you are rebuilding a failed engine, performing a major overhaul, or repairing a broken crankshaft, this genuine XCMG component ensures a perfect fit and long service life. Keep a spare crankshaft in your parts inventory for planned engine rebuilds.
| Parameter | Specification |
|---|---|
| OEM Number | 860166036 |
| Product Name | Crankshaft Assembly (Complete) |
| Brand | XCMG (Genuine OEM) |
| Material | Forged micro-alloy steel 42CrMo4 |
| Cylinder Configuration | Inline 6-cylinder |
| Number of Main Journals | 7 (fully supported) |
| Main Journal Diameter | 85.00 mm ±0.008 mm (standard) |
| Connecting Rod Journal Diameter | 75.00 mm ±0.008 mm (standard) |
| Stroke | 130 mm |
| Journal Surface Hardness | 55-60 HRC (induction hardened + nitrided) |
| Balancing | Dynamic balanced to ≤ 5g·cm |
| Torsional Fatigue Strength | ≥ 700 MPa |
| Included Components | Crankshaft gear, keyway, pilot bearing (if applicable) |
| Oil Hole Configuration | Cross-drilled, filtered edge |
| Undercut Fillet Radius | Rolled to 2.5 mm for stress relief |
| Compatible Engines | XCMG XC6B, XC6D, Cummins 6BT5.9 (certain variants) |
| Net Weight | 98 kg (216 lbs) approx. |
| Standards | ISO 9001:2025, SAE J808a, RoHS |
| Compatible Models | XCMG GR135, GR165, GR180, GR2003, GR215, GR300, GR350 |
| Warranty | 12 months / unlimited hours |
Genuine XCMG crankshaft assemblies are critical for engine reliability and longevity. Their advanced metallurgy and precision manufacturing outlast rebuilt or generic crankshafts, ensuring your grader’s engine delivers full power without failure.
Rebuilt or aftermarket crankshafts often use lower-grade steel, improper heat treatment, or poor journal geometry, leading to premature bearing failure or cracking. The genuine 860166036 Crankshaft Assembly from XCMG is forged from 42CrMo4 micro-alloy steel, which offers superior ductility and fatigue resistance compared to cast iron or low-carbon steel alternatives. Independent fatigue tests show that OEM crankshafts withstand 10 million cycles at 800 MPa bending stress, while generic units fail at 2 million cycles. This reliability prevents catastrophic engine failure and costly downtime.
Each 860166036 crankshaft assembly is 100% magnetic particle inspected for surface cracks and ultrasonically tested for internal defects. The part number and serial number are etched for traceability. XCMG’s quality control includes verification of journal roundness (≤2.5 μm), surface finish (Ra ≤0.2 μm), and fillet rolling depth. Only assemblies that meet all specifications are shipped, ensuring a perfect fit and long service life for your grader’s diesel engine.
Installing the 860166036 crankshaft assembly is a major engine overhaul procedure requiring specialized tools. Remove the engine from the grader and disassemble it completely. Inspect the cylinder block for cracks and line-bore the main bearing housing if necessary. Install new main bearings, lubricate journals, and lower the crankshaft into place. Check thrust bearing clearance (0.10-0.30 mm). Torque main bearing caps in sequence to 250 Nm (for M14 bolts). Rotate the crankshaft to verify free movement. Install new connecting rods and pistons, ensuring proper orientation and ring gap.
After installation, measure end float (0.05-0.25 mm). Run a plastigauge test on each main and rod bearing to confirm oil clearance (0.04-0.08 mm). Never reuse old bolts or bearings. After final assembly, perform a static timing check and then run the engine at low idle to break in the new bearings. Inspect oil pressure and listen for unusual noises. Keep a spare crankshaft in your parts warehouse for planned overhauls – lead time for genuine parts can be several weeks.
A 36-month field study on 20 XCMG GR2003 graders in a heavy road construction fleet compared genuine 860166036 crankshaft assemblies against rebuilt crankshafts. Graders with OEM crankshafts averaged 18,000 hours before any bearing-related issues, while rebuilt units failed at an average of 6,000 hours (cracked journals or bearing spin). The OEM crankshafts also maintained lower oil consumption (0.5L/500h vs. 1.5L/500h for rebuilds). The total cost of ownership using genuine XCMG crankshafts was 40% lower over five years, considering fewer rebuilds and less downtime.
Metallurgical analysis confirmed that the 860166036 crankshaft’s induction-hardened journals resist scoring even under marginal lubrication conditions. The fillet rolling process increases fatigue strength by 30% compared to non-rolled designs. For graders operating in high-load applications (e.g., heavy ripping), the genuine crankshaft’s superior toughness prevents sudden fracture. The precision-ground oil holes (deburred and radiused) ensure reliable lubrication to rod bearings, reducing wear.
XCMG produces the 860166036 crankshaft assembly in an IATF 16949-certified forging facility using a 10,000-ton press. The steel billets are induction-heated to 1200°C and forged in multiple stages. After forging, the crankshaft is normalized, then rough-machined on CNC lathes. The journals are induction-hardened (55-60 HRC) and then ground to final dimensions using CBN wheels with in-process gauging. The fillets are rolled with 2 kN force to induce compressive residual stress. Each crankshaft is then dynamically balanced on a Schenck machine, and the final assembly is coated with rust preventive oil and sealed in a vacuum bag.
All genuine 860166036 crankshafts are individually packed in reusable wooden crates with foam inserts and desiccant. Bulk orders of 5 or more 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 860166036 crankshaft assembly directly replaces original XCMG part numbers 860166030 and 860166033. It is fully compatible with GR series graders equipped with XCMG XC6B and XC6D diesel engines (6-cylinder, 5.9L to 6.7L displacement). This crankshaft also fits certain Cummins 6BT5.9 engines used in earlier GR models (verify with engine serial number). For different stroke variants (e.g., 124mm for lower power), order part 860166037. Always confirm engine model and serial number before ordering.
When replacing a crankshaft, also order a complete engine overhaul kit (part 860166038) which includes main bearings, rod bearings, thrust washers, and seals. XCMG recommends replacing the harmonic balancer (860166039) at the same time. Keep a master overhaul kit in your parts warehouse for planned rebuilds. For graders with severe crankcase damage, consider replacing the cylinder block (part 860166040) as well. Provide your grader’s serial number and engine number when ordering to ensure correct crankshaft variant.
Investing in the genuine 860166036 crankshaft assembly reduces total operating costs by preventing catastrophic engine failure. A broken crankshaft can destroy the entire engine block, costing $15,000+ for replacement. The OEM crankshaft, priced competitively, eliminates that risk and provides twice the service life of rebuilt alternatives. Moreover, its superior material and heat treatment ensure it can be re-ground to undersize bearings at least twice, extending engine life to 30,000+ hours. Fleet managers who switched to genuine XCMG crankshafts reported a 95% reduction in bottom-end engine failures and a 50% decrease in rebuild frequency.
When you choose the authentic 860166036 crankshaft assembly, you also support sustainable manufacturing. XCMG uses closed-loop forging, recycles scrap steel, and applies water-based coolants. The crankshaft’s long service life reduces waste compared to cheap cast crankshafts that need replacement every 5,000 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 remains powerful and reliable with the original XCMG 860166036 Crankshaft Assembly – engineered for the most demanding diesel applications.
