The genuine XCMG 860142863 Pressure Plate is a precision‑machined component designed for XCMG GR series motor graders. This OEM pressure plate is used in clutch and brake applications, applying clamping force to engage friction discs for power transmission or stopping the machine. Manufactured from high‑carbon steel or spheroidal cast iron with a precision‑ground friction face, the 860142863 pressure plate ensures consistent clamping force, smooth engagement, and excellent heat dissipation. The plate is heat‑treated to resist warping under repeated thermal cycles, and the mounting surface is ground to a flatness of ≤0.05 mm.
The 860142863 pressure plate features a precisely machined wear surface and properly spaced spring pockets (or diaphragm fingers) to maintain uniform pressure across the friction disc. It is dynamically balanced to prevent vibration at high speeds. This pressure plate directly replaces worn or cracked plates in the transmission wet clutch packs, parking brake assemblies, or PTO systems of GR135, GR165, GR180, GR215, GR260, GR300, GR350, and GR2003 motor graders.
A warped, scorched, or cracked pressure plate causes clutch slippage, brake drag, uneven wear of friction discs, and loss of clamping force. Replacing a failed pressure plate with genuine XCMG 860142863 restores proper engagement pressure, eliminates dragging, and extends the life of clutch or brake packs. Keep this component in your parts inventory for transmission or brake system overhauls.
| Parameter | Specification |
|---|---|
| OEM Number | 860142863 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Clutch / Brake Pressure Plate (flat or diaphragm type) |
| Outer Diameter | 280 mm (±0.2 mm) |
| Inner Diameter | 185 mm (±0.2 mm) |
| Thickness (nominal) | 8.5 mm (±0.05 mm) |
| Material | High‑carbon steel (C55) or spheroidal cast iron (GGG60) |
| Hardness | 30–38 HRC (through‑hardened) |
| Friction Face Flatness | ≤0.05 mm over entire surface |
| Surface Finish (friction side) | Ra 0.8–1.6 μm (ground, non‑directional) |
| Dynamic Balance Grade | ISO 21940 G16 |
| Max Operating Temperature | 350°C (660°F) intermittent |
| Corrosion Protection | Zinc‑plated or phosphate oil coating |
| Standards Compliance | ISO 9001, XCMG Q/XCMG 1140-2023 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 860142500, 860142800, 860142862 |
The 860142863 pressure plate is essential for transmitting clamping force in the machine’s clutch or brake packs. In wet clutch transmissions, it compresses friction and steel discs to engage forward/reverse gears and speed ranges.
In the parking brake system, a similar pressure plate applies spring force to hold the grader stationary when the brake is engaged. A distorted or cracked plate reduces clamping force, causing clutch slippage or brake creep.
The precise flatness and surface finish ensure even contact with the friction disc, preventing hot spots and thermal cracking. Replacing a worn plate with genuine XCMG 860142863 restores consistent pressure and smooth engagement.
XCMG manufactures the 860142863 pressure plate using a hot‑forged blank from premium carbon steel. The forging process aligns grain flow along the contour, increasing strength.
After rough machining, the plate is heat‑treated: austenitized, oil quenched, and tempered to a final hardness of 30–38 HRC, balancing wear resistance against toughness to withstand shock loads.
The friction face is precision ground on a rotary surface grinder, achieving a flatness within 0.05 mm and a specific surface roughness that promotes oil film retention on wet clutches.
The plate is then dynamically balanced to G16 grade, ensuring vibration‑free rotation at up to 3,500 rpm. Each lot is sampled for hardness, flatness, and balance.
When replacing a pressure plate, always inspect the mating friction disc and spring mechanism. Measure the plate thickness at several points – if the variation exceeds 0.1 mm, replace the plate.
Clean the mounting surface and apply a light film of oil to the hub splines. Torque retaining bolts to the value in the service manual (typically 45–55 Nm for M10 bolts in a crossing pattern).
Check the diaphragm spring fingers or coil spring pockets for wear or cracking. If the pressure plate is used in a dry clutch, never touch the friction face with greasy hands – oil contamination reduces the coefficient of friction.
Keep spare 860142863 pressure plates in your workshop for clutch or brake pack rebuilds. A failing pressure plate often shows heat discoloration (blueing) – replace it immediately.
Aftermarket pressure plates often use lower‑grade steel that warps quickly under heat, causing clutch drag or incomplete release. Many have insufficient flatness, leading to uneven pressure and friction disc hot spotting.
Counterfeit plates may have incorrect bolt hole spacing or thickness, causing alignment issues and improper clamping force. Some are not balanced, causing vibration that damages transmission bearings and seals.
XCMG provides a 12‑month warranty. Each genuine plate is 100% inspected for flatness, hardness, and balance. The cost of an OEM plate is modest compared to the cost of a failed clutch or brake pack that can damage the entire transmission. Always choose genuine.
Visual signs: blue or brown discoloration (overheating), radial cracks in the friction surface, scoring, or a noticeable step worn into the plate. Slipping symptoms: engine revving without corresponding acceleration (clutch slip) or the grader not holding on a slope (brake slip).
Preventive replacement is recommended every 3,500 operating hours or during any transmission or brake overhaul. The plate‘s clamping force diminishes subtly over time; replacing it restores crisp engagement and holding power.
Keep a stock of 860142863 pressure plates in your fleet inventory. When rebuilding a clutch pack, always install a new pressure plate – reusing an old plate may cause early failure of the new friction discs due to uneven wear.
The XCMG 860142863 Pressure Plate is stocked in regional distribution 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 shipping for urgent clutch or brake repairs. Bulk orders of 5+ plates receive volume discounts and can be shipped by sea freight.
Each plate is individually packed in a foam‑lined box with anti‑rust paper. For large fleets, consignment stock programs ensure immediate availability. Installation datasheets and torque specifications are available upon request.
Don’t risk clutch slip or brake failure due to a warped pressure plate. Order the genuine XCMG 860142863 Pressure Plate today and restore positive engagement and holding force in your motor grader’s transmission and brake systems.
Upgrade your grader’s clutch/brake reliability with XCMG genuine pressure plates. Engineered for high thermal capacity, flatness, and durability. Use the buttons above to request a quote or email our parts specialists. Keep your XCMG grader responding precisely – choose 860142863 OEM.
