The genuine XCMG 380900836 Adjustment Plate is a precision‑machined wear shim for motor grader blade mount systems and moldboard alignment.
This OEM 380900836 adjustment plate is made from case‑hardened steel with a zinc‑nickel finish, providing excellent wear resistance and corrosion protection.
It is used to adjust the vertical clearance between the circle drawbar and the main frame, ensuring precise blade control and eliminating play.
Engineered for XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders, this plate is a direct replacement for worn or missing shims.
The adjustment plate is installed between the upper clamping plate and the circle raceway, allowing fine adjustment of vertical slop. A worn plate causes blade bounce and poor grade finish.
Replacing a damaged or missing adjustment plate with genuine XCMG 380900836 restores factory clearances, eliminates knocking, and extends the life of the circle drive system.
This component is also used in articulation joint shimming and blade lift linkage adjustment. XCMG 380900836 guarantees proper thickness, flatness, and long‑term stability.
| Parameter | Specification |
|---|---|
| OEM Number | 380900836 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Adjustment Plate / Wear Shim / Spacer Plate |
| Material | High‑carbon steel (C60 / 1060), through‑hardened |
| Hardness (HRC) | 45‑50 HRC (uniform core and surface) |
| Nominal Thickness | 2.0 mm ±0.05 mm (also 1.0, 1.5, 2.5 mm variants available) |
| Overall Dimensions (L x W) | 160 mm × 80 mm ±0.3 mm |
| Bolt Hole Pattern | 2 holes, Ø10.5 mm, spaced 120 mm center to center |
| Surface Flatness | ≤ 0.05 mm over entire face (lapped finish) |
| Surface Finish (Ra) | ≤ 0.4 µm (ground and polished) |
| Corrosion Protection | Zinc‑nickel plating (360h salt spray) + oil impregnation |
| Compressive Yield Strength | ≥ 1400 MPa (203,000 psi) |
| Operating Temperature Range | -50°C to +180°C |
| Load Capacity (per plate) | 125 kN under uniform clamp load |
| Magnetic Particle Inspection | 100% (crack detection) |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 |
| Superseded Part Numbers | 380900822, 380900830, 380900834 |
The 380900836 adjustment plate takes up slack between the circle drawbar and the upper clamping plate. Over time, wear strips and bushings wear, increasing vertical clearance.
Excessive vertical play allows the blade to bounce during grading, causing washboarding and poor surface finish. The adjustment plate restores factory preload.
In the moldboard assembly, this plate ensures the cutting edge remains firmly on the ground, improving material cutting efficiency and operator control.
Replacing a worn or missing plate with genuine XCMG 380900836 eliminates rattling, reduces vibration, and extends the service life of circle components.
Properly shimmed clearance also reduces wear on the circle gear and the clamping plates, saving costly repairs.
Each 380900836 adjustment plate is blanked from high‑carbon steel strip, then stress‑relieved to remove distortion. Both faces are ground parallel on a Blanchard grinder.
Flatness is held within 0.05 mm over the entire face. After grinding, plates are through‑hardened to 45‑50 HRC and tempered for toughness.
The final lapping operation produces a mirror finish with Ra ≤ 0.4 µm, minimizing galling against mating parts. The zinc‑nickel coating provides sacrificial corrosion protection.
XCMG inspects each plate for thickness using laser micrometers and for flatness using optical flats. A sample is pull‑tested to verify compressive strength.
To adjust circle drawbar clearance, loosen the upper clamping plate bolts. Measure the gap between the plate and the circle using a feeler gauge. Target vertical play is 0.5‑1.0 mm.
Select the correct number of 380900836 adjustment plates to achieve this clearance. Insert the plate(s) between the clamping plate and the drawbar.
Re‑torque bolts to 180 Nm in a crossing pattern and re‑check clearance. For articulation joints, remove the joint pin, clean faces, and add or remove plates to achieve zero axial play.
Never stack more than three plates in one location to avoid bolt stretch. Lubricate plates lightly before assembly.
Replace the 380900836 plate if it becomes permanently deformed (cupping), if bolt holes elongate, or if the surface shows deep scoring from movement.
Also replace if you need a different thickness to adjust play, or if the existing plate is cracked or corroded beyond recovery.
Check circle drawbar clearance every 1,000 operating hours. If vertical play exceeds 2 mm, install additional 380900836 spacers to bring it back to 0.5‑1.0 mm.
Inspect articulation joints for free play during every lubrication service. Add spacers as needed to eliminate axial movement.
A properly shimmed joint will have no detectable play when the machine is on level ground. Keep a kit of various thickness plates (1.0, 1.5, 2.0, 2.5 mm) in your parts inventory.
The cost of a set of adjustment plates is minimal compared to rebuilding a worn circle raceway or replacing an articulation hinge.
Genuine XCMG 380900836 adjustment plates are backed by a 12‑month warranty. Regional warehouses: Houston, Rotterdam, Dubai, and Shanghai maintain full thickness ranges.
Air freight delivery within 3‑7 business days worldwide. Emergency 24‑48 hour shipping available for urgent repairs.
Bulk orders (50+ plates) receive volume discounts and sea freight options. Aftermarket shims are often made from mild steel without heat treatment, quickly deforming and losing preload.
Genuine XCMG 380900836 uses hardened bearing steel for permanent dimensional stability. Order genuine today to keep your grader’s clearances within factory specification.
Don’t ignore excessive play in the circle drawbar – it leads to accelerated wear of the circle gear and clamping plates. The 380900836 adjustment plate is an inexpensive solution to a potentially expensive problem.
Keep spares on hand and shim proactively. Upgrade your motor grader’s adjustment capability with XCMG genuine spacer plates – precision ground, case‑hardened, and dimensionally accurate.
Order the 380900836 Adjustment Plate now and maintain tight, vibration‑free circle and articulation joints for thousands of productive hours.
