The genuine XCMG 860505973 Inner Friction Plate is a high‑performance friction disc manufactured for XCMG GR series motor graders. This OEM friction plate is used in wet clutch packs, brake assemblies, and limited‑slip differentials, providing controlled torque transmission and smooth engagement under extreme loads. Manufactured from a stamped steel core with bonded paper‑based or sintered friction material, the 860505973 inner friction plate delivers consistent coefficient of friction, excellent heat dissipation, and long service life in oil‑bath environments. The plate is precision‑ground for flatness and thickness, ensuring uniform clamping pressure and chatter‑free operation on GR135, GR165, GR180, GR215, GR260, GR300, GR350, and GR2003 graders.
The 860505973 inner friction plate features internal splines that engage with the mating hub, and the outer diameter runs against the reaction plate or drum. The friction material is resin‑impregnated and heat‑treated for resistance to glazing, oil degradation, and thermal shock. The plate is supplied with pre‑machined oil grooves to promote cooling and remove wear debris. This component is a direct replacement for worn or burned friction plates in transmission clutch packs, parking brakes, and PTO systems.
A worn or glazed friction plate causes clutch slippage, erratic shifting, brake fade, and eventual failure of the clutch pack. Replacing a damaged plate with genuine XCMG 860505973 restores original friction characteristics, eliminates slipping, and ensures smooth, predictable power transfer. Keep this friction plate in your parts inventory for transmission or brake system overhauls.
| Parameter | Specification |
|---|---|
| OEM Number | 860505973 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Wet Friction Plate (Inner / Splined) |
| Outer Diameter | 210.0 mm (±0.15 mm) |
| Inner Diameter (spline root) | 152.0 mm (±0.10 mm) |
| Thickness (nominal) | 3.20 mm (±0.05 mm) |
| Friction Material | Paper‑based composite (resin‑impregnated cellulose / carbon fiber) |
| Core Material | Stamped steel (SPCC), zinc‑plated or phosphate coated |
| Spline Type | Internal involute spline, 24 teeth, module 1.5, 30° pressure angle |
| Coefficient of Friction (wet) | 0.10–0.12 (dynamic), 0.12–0.14 (static) in ATF |
| Maximum Operating Temperature | 180°C (356°F) continuous, 250°C peak |
| Groove Pattern | Radial / spiral oil grooves (both sides) |
| Fluid Compatibility | Automatic transmission fluid (ATF), mineral oil, synthetic lubricants |
| Torque Capacity (per plate) | 550 Nm @ 1.5 MPa clamping pressure |
| Wear Limit (thickness) | 2.80 mm (replace if below this value) |
| Flatness (max. distortion) | ≤0.10 mm |
| Standards | ISO 9001, XCMG Q/XCMG 1122-2023 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 860505800, 860505900, 860505970 |
The 860505973 inner friction plate is an essential component of wet clutch packs in the grader’s powershift transmission. It alternates with steel separator plates; when hydraulic pressure applies the clutch, the friction plates clamp together to transmit torque.
In brake applications, similar friction plates are used in spring‑applied, hydraulic‑released parking brakes. The friction material provides high static holding torque, keeping the grader stationary on slopes.
The paper‑based friction material is designed to operate in an oil bath, providing smooth engagement, high energy absorption, and resistance to glazing. A worn or burned plate will cause clutch slip, harsh shifts, or brake drag, jeopardising safety.
Replacing a damaged plate with genuine XCMG 860505973 restores original friction coefficient, eliminates clutch chatter, and ensures consistent shift quality. Regular inspection during transmission overhauls is critical.
XCMG manufactures the 860505973 friction plate using a high‑quality paper‑based composite containing carbon fibre and thermosetting resin. The material is calendered to precise thickness, cut to shape, and bonded to a stamped steel core.
The steel core is made from SPCC sheet, stamped with internal splines and oil holes, then zinc‑plated or phosphated for corrosion resistance. The friction material is attached using a high‑strength adhesive and cured in a heated press.
After bonding, the plate is ground to achieve final thickness and flatness within 0.05 mm. Oil grooves are machined or moulded into the friction surface to enhance cooling and debris removal. Each plate is 100% inspected for thickness, flatness, and spline fit.
Genuine XCMG friction plates are endurance‑tested on a dynamometer for millions of engagement cycles. The material maintains stable friction even after prolonged exposure to high‑temperature ATF, outperforming aftermarket plates that often glaze or disintegrate.
When rebuilding a clutch pack, inspect the steel separator plates, piston seals, and return springs. Replace all friction plates as a set – mixing worn plates with new ones will cause uneven engagement.
Soak new 860505973 friction plates in clean ATF for at least 30 minutes before assembly to saturate the friction material. Install them in the correct order, alternating with steel plates as per the service manual.
Measure the pack clearance (end‑play) with feeler gauges after assembly; typical clearance is 0.3–0.8 mm. If out of specification, adjust by changing the number or thickness of separator plates.
After reassembly, run a stall test to verify clutch holding torque. Keep spare 860505973 plates in your shop for transmission or brake pack overhauls. Using new plates ensures crisp shifts and reliable stopping power.
Aftermarket friction plates often use inferior paper‑based material with low shear strength, leading to delamination under high torque. Many have incorrect spline profiles, causing fretting and wear on the hub.
Counterfeit plates may have insufficient oil groove depth, starving the friction interface of cooling oil and causing thermal degradation within hours. The thickness variation often exceeds 0.2 mm, resulting in uneven clamping and shudder.
Genuine XCMG plates are 100% checked for flatness, thickness, and coefficient of friction. XCMG provides a 12‑month warranty against manufacturing defects. Using OEM friction plates ensures consistent shift feel, longer transmission life, and protection against expensive clutch pack failure.
Symptoms of worn friction plates: transmission slippage (engine RPM increases without speed gain), harsh or delayed shifts, burning smell from the transmission oil, and dark/discoloured ATF with a burnt odour.
Preventive replacement is recommended every 3,000–4,000 operating hours or during any major transmission overhaul. Even if plates look intact, the friction material may have lost its elasticity and grip.
During each 1,000‑hour service, perform a clutch stall test as per the manual. If the stall RPM exceeds the specification, the clutch pack is slipping and requires replacement.
Keep a stock of 860505973 plates in your fleet inventory. When replacing one clutch pack, consider rebuilding all clutch packs in the same transmission – they have similar service life. Proactive replacement prevents sudden transmission failure and costly downtime.
The XCMG 860505973 Inner Friction Plate is stocked in regional hubs: 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 urgent transmission repairs. Bulk orders of 25+ plates receive volume discounts and can be shipped by sea freight. Each plate is individually wrapped in a corrosion‑inhibiting bag.
For large fleets, consignment stock programs ensure immediate availability. Our parts specialists can provide installation torque specs and clutch pack stacking charts. Technical datasheets are available upon request.
Don’t let worn friction plates ruin your transmission’s shifting performance or brake holding ability. Order the genuine XCMG 860505973 Inner Friction Plate today and restore smooth, reliable power transfer and braking in your motor grader.
Upgrade your grader’s drivetrain reliability with XCMG genuine friction plates. Engineered for consistent friction, high heat capacity, and long service life. Use the buttons above to request a quote or email our parts specialists. Keep your XCMG grader shifting smoothly – choose 860505973 OEM plate.
