The genuine XCMG 800363215 Upper Clamping Plate (Spare Part) is a precision‑forged steel component designed to secure the blade mounting assembly on motor grader circle drawbars and moldboard linkage systems. This OEM 800363215 upper clamping plate provides robust clamping force between the circle and the drawbar, preventing vertical movement and ensuring rigid blade control during grading operations. Manufactured from high‑tensile alloy steel with induction‑hardened wear surfaces, the XCMG upper clamping plate resists deformation and fatigue under extreme side loads and impact shocks. The 800363215 plate is an essential spare part for XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders.
The upper clamping plate works together with lower plates and wear strips to maintain precise clearance between the circle and drawbar. A worn or cracked clamping plate allows the circle to lift under load, causing poor blade control, uneven grading, and accelerated wear of mating components. Replacing a damaged plate with genuine XCMG 800363215 restores original clamping force, eliminates vertical play, and extends the service life of your grader’s circle drive system.
This component is also used in articulation joint locking mechanisms and blade pitch adjustment assemblies. XCMG 800363215 ensures consistent preload, reduces operator fatigue, and maintains grade accuracy even in the most demanding applications.
| Parameter | Specification |
|---|---|
| OEM Number | 800363215 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Upper Clamping Plate / Circle Wear Plate / Retainer |
| Material | High‑strength alloy steel (42CrMo4 / AISI 4140), forged |
| Overall Length | 220 mm ±0.3 mm |
| Overall Width | 110 mm ±0.2 mm |
| Thickness (Nominal) | 25 mm ±0.2 mm |
| Bolt Hole Diameter | 4 holes, Ø12.5 mm (countersunk for M12 bolts) |
| Hardness (Core) | 32‑38 HRC |
| Wear Surface Hardness | 52‑56 HRC (induction hardened, 3 mm depth) |
| Surface Finish | Zinc‑nickel plating (480h salt spray) + baked epoxy topcoat |
| Flatness (Gasket Face) | ≤ 0.05 mm / 100 mm |
| Max Clamping Force @ 120 Nm Bolt Torque | 85 kN (19,100 lbf) |
| Operating Temperature Range | -40°C to +150°C |
| Corrosion Test | 480h salt spray per ASTM B117 – no red rust |
| Magnetic Particle Inspection | 100% (crack detection) |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 800363189, 800363200, 800363208 |
The 800363215 upper clamping plate secures the circle drawbar to the main frame, preventing vertical lift of the blade under heavy cutting loads. It absorbs reaction forces from the moldboard and transfers them to the circle structure.
When the clamping plate wears or cracks, the circle can rise during grading, causing the blade to bounce and lose grade. This leads to poor surface finish, increased operator fatigue, and accelerated wear of circle gear teeth.
Replacing a damaged plate with genuine XCMG 800363215 restores preload, eliminates vertical movement, and ensures accurate blade positioning throughout the circle rotation range.
Each 800363215 plate is forged from 42CrMo4 steel, which provides superior toughness and fatigue resistance compared to cast or flame‑cut plates. The forging process aligns grain flow with the part contour, reducing stress risers.
After CNC milling of bolt holes and contour, the plate is through‑hardened to 34 HRC, then the wear surfaces are induction hardened to 54 HRC to a depth of 3 mm. This gives a hard, wear‑resistant face with a ductile core that absorbs impact.
XCMG performs 100% magnetic particle inspection to detect any cracking, and dimensional inspection using CMM. The clamping force consistency is verified using torque‑tension test rigs.
To replace a worn plate, raise the circle and remove the blade to access the clamping area. Remove the four mounting bolts using a socket wrench. Clean the mating surfaces on the drawbar and circle.
Install the new 800363215 plate with the wear surface facing the circle. Apply medium‑strength thread locker to the bolts. Torque the M12 bolts to 90 Nm in a cross pattern. Recheck torque after 10 hours of operation.
Measure the gap between the plate and circle using a feeler gauge – it should be less than 0.3 mm. If larger, shim or replace the lower wear strips. Always replace all clamping plates (upper and lower) as a set.
Visible gap between the plate and circle when the blade is lifted, hammering noise when grading, uneven wear of the circle raceway, and the blade drifting down under its own weight.
Cracks around the bolt holes or a polished appearance on the wear surface indicate the need for immediate replacement to avoid circle drop‑out.
XCMG recommends checking upper clamping plate bolt torque every 500 operating hours. Inspect for wear or cracking at 1,000‑hour intervals. Replace the plate every 4,000‑5,000 hours for typical grading.
For heavy ripping or rocky material, shorten replacement to 2,500‑3,000 hours. Always use genuine XCMG 800363215 – aftermarket plates often lack proper hardness and can crack under load.
Keep the bolt holes clean and apply anti‑seize to prevent corrosion. If you notice increased vertical play in the circle, inspect the clamping plate immediately to avoid damage to the drawbar.
Genuine XCMG 800363215 upper clamping plates come with a 12‑month warranty. Stocked in regional warehouses: Houston (North America), Rotterdam (Europe), Dubai (Middle East), and Shanghai (Asia).
Standard air freight delivers within 3‑7 business days worldwide. Emergency 24‑48 hour shipping available for critical repairs. Bulk orders (10+ plates) receive volume discounts and sea freight options.
Aftermarket plates often use mild steel or lack induction hardening, leading to rapid wear and premature failure. Genuine XCMG 800363215 ensures correct metallurgy, heat treatment, and dimensional accuracy. Order genuine today to protect your grader’s circle drive and maintain accurate blade control.
Keep spare 800363215 upper clamping plates in your parts inventory. A worn plate ruins the circle raceway, resulting in expensive replacement of the entire circle assembly. Replace proactively during scheduled overhauls and avoid unplanned downtime.
Upgrade your motor grader’s reliability with XCMG genuine upper clamping plates. Forged, induction‑hardened, and 100% inspected – order the 800363215 Upper Clamping Plate now and experience rigid circle retention for thousands of hours in the toughest grading conditions.
