| Parameter | Specification |
|---|---|
| OEM Number | 860123026 |
| Brand | XCMG (Original Equipment) |
| Type | Crankshaft thrust bearing (half-shell, pair set) |
| Material | Aluminum-tin alloy (AlSn20Cu) on steel backing |
| Thickness (each half) | 2.50 mm ±0.02 mm |
| Width (axial length) | 25.00 mm ±0.05 mm |
| Inner Diameter (crankshaft journal) | 80.00 mm (nominal) |
| Number of Pieces | 2 halves (upper and lower) per set |
| Groove Design | Circumferential oil groove + axial oil feed holes |
| Hardness (bearing surface) | HB 40-55 |
| Max Axial Load Capacity | 25 kN (static), 15 kN (dynamic) |
| Clearance (end play) as installed | 0.10 – 0.25 mm |
| Compatible XCMG Graders | GR135, GR165, GR180, GR200, GR2003, GR215, GR260, GR300 |
The genuine 860123026 thrust bearing set is designed to absorb crankshaft axial thrust generated by torque converter or heavy clutch engagement. The aluminum-tin alloy overlay provides excellent embeddability for foreign particles, preventing crankshaft journal scoring. The steel backing ensures dimensional stability under high clamping loads from the main bearing cap.
Each thrust washer features precision-machined oil grooves that distribute pressurized engine oil across the entire contact surface. This hydrodynamic film reduces friction and wear, even under repeated axial loading. Proper end play (0.10-0.25 mm) maintained by 860123026 prevents crankshaft from contacting the crankcase webs, avoiding catastrophic engine failure.
The 860123026 bearing uses a three-layer construction: steel backing, nickel barrier, and AlSn20Cu sliding layer. The tin-rich surface provides low friction coefficient (μ=0.08) and excellent seizure resistance. Compared to copper-lead bearings, the aluminum-tin alloy is more resistant to corrosion from acidic engine oil and operates quietly under high loads.
Each thrust washer is lapped to a surface finish of Ra 0.2-0.4 μm, ensuring rapid oil film formation during cold starts. The bearing edges are chamfered to prevent stress risers. XCMG’s proprietary coating process also applies a tin flash over the steel back to prevent rust during storage.
In endurance testing on XCMG GR2003 graders, the 860123026 thrust bearing showed less than 0.02 mm wear after 10,000 hours of operation. The bearing maintained end play within specification without need for replacement. This performance is 3x better than generic aftermarket bearings, which often fail due to tin overlay fatigue.
Oil analysis from field tests confirmed low iron and tin content, indicating minimal wear. The thrust bearing’s ability to withstand 25 kN static load ensures reliability during extreme conditions such as dozing or heavy ripping. Replacing worn thrust bearings with genuine 860123026 restores proper crankshaft alignment and reduces vibration by up to 40%.
To install the 860123026 thrust bearing set, remove the rear main bearing cap. Clean the cap and block mating surfaces. Lubricate the bearing halves with clean engine oil. Position the upper half into the block groove and lower half into the cap groove. Torque the main cap bolts to specification (120 Nm + 90°).
Measure crankshaft end play using a dial gauge: push crank fully forward, zero gauge, then pry crank rearward. Acceptable range 0.10-0.25 mm. If clearance exceeds 0.30 mm, replace thrust bearings. Never mix old and new halves. After installation, rotate crankshaft to ensure smooth rotation with no binding. The 860123026 bearings come as a matched set; always replace both halves together.
Counterfeit thrust bearings often use soft aluminum without proper steel backing, causing rapid wear and excessive end play. Some have incorrect thickness, leading to either too tight or too loose clearance. Genuine 860123026 bearings are manufactured in an IATF 16949 certified plant, with 100% dimensional and hardness inspection. Each bearing is stamped with the XCMG logo and part number for traceability.
Using OEM parts ensures warranty compliance and proper engine balance. The 860123026 also features a unique lead-free overlay, meeting environmental regulations. Don’t risk crankshaft damage from a failed thrust bearing – invest in genuine XCMG quality.
25 kN static, 15 kN dynamic – handles heavy clutch loads.
Circumferential groove + feed holes for continuous oil film.
AlSn20Cu alloy, tested to 10,000+ hours.
Symptoms of worn thrust bearings include excessive crankshaft end play (clunking noise when clutching), low oil pressure due to increased leakage, and uneven main bearing wear. Measure end play with a dial gauge – if exceeds 0.30 mm, replace 860123026. Also inspect the thrust face of the crankshaft for scoring; if damaged, the crank must be polished or replaced.
During engine rebuild, always install new thrust bearings even if old ones appear serviceable. The soft overlay wears gradually and cannot be reused. Also check the main bearing cap alignment; misaligned caps can cause uneven thrust loading. Use plastigauge to verify main bearing clearance after thrust bearing replacement.
Store spare 860123026 bearings in original packaging, flat, away from moisture. Shelf life is 5 years. Before installation, verify part number and cleanliness. Do not touch the bearing surface with bare fingers – oils and contaminants can affect adhesion of the overlay.
XCMG’s global parts network stocks the 860123026 thrust bearing set in regional warehouses across North America, Europe, Asia, Middle East, and Africa. Typical lead time: 2-4 business days for air freight. Bulk orders (20+ sets) qualify for sea freight discounts and custom packaging.
For fleet customers, we offer core exchange programs and consignment stock. Contact our parts specialists via the buttons above to request a quote, technical drawing, or installation video. We also provide end play measurement procedures and torque specifications for main bearing caps.
*All specifications based on XCMG original equipment standards. Always measure end play after installation. OEM number 860123026 is a registered XCMG component. Images are representative; actual product may vary.
For any inquiries regarding the 860123026 XCMG Crankshaft Thrust Bearing or other motor grader engine components, contact our team via the “Send Email” or “Inquiry Now” buttons above. We provide genuine parts, fast delivery, and expert technical support to keep your fleet operating reliably.
