The genuine XCMG 380800372 Cover Plate is a precision‑stamped steel access cover used on motor grader transmissions, hydraulic reservoirs, and final drive housings.
This OEM 380800372 cover plate seals inspection ports, drain openings, or filler necks, preventing dirt ingress and oil leakage while allowing service access.
Manufactured from cold‑rolled steel with a zinc‑nickel plating and powder topcoat, the XCMG cover plate offers excellent corrosion resistance and impact strength.
Engineered for XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders, this plate is a direct replacement for cracked, deformed, or missing covers.
A damaged cover plate allows contaminants into the gearbox or tank, causing premature wear of bearings, gears, and pumps. It can also lead to oil loss and environmental pollution.
Replacing a faulty cover plate with genuine XCMG 380800372 restores sealing integrity, protects internal components, and meets stringent environmental regulations.
This component is also used on differential housings, torque converter access ports, and brake chamber covers. XCMG 380800372 guarantees OE fit and long‑term durability.
| Parameter | Specification |
|---|---|
| OEM Number | 380800372 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Access Cover Plate / Inspection Cover / Sealing Plate |
| Material | Cold‑rolled steel (DC04 / AISI 1008), 3 mm thickness |
| Surface Finish | Zinc‑nickel plating (12 µm) + black epoxy powder coat (560h salt spray) |
| Overall Dimensions (L x W) | 280 mm × 120 mm ±0.5 mm |
| Thickness (Material) | 3.0 mm ±0.1 mm |
| Bolt Hole Pattern | 4 holes, Ø8.5 mm, spacing 240 mm × 80 mm |
| Gasket Groove | Integrated recess for rubber O‑ring (5 mm width × 2 mm depth) |
| Flatness Tolerance | ≤ 0.15 mm over entire surface |
| Hardness (Steel) | 45‑50 HRC (work‑hardened during stamping) |
| Operating Temperature Range | -50°C to +150°C (with nitrile gasket) |
| Seal Compatibility | Nitrile (NBR), Viton (FKM), or paper gasket (not included) |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 380800355, 380800366, 380800370 |
The 380800372 cover plate seals access openings on the transmission case, hydraulic tank, and final drive housings. It prevents external dirt, water, and debris from entering the lubricated compartment.
A missing or deformed cover allows abrasive particles to mix with the oil, accelerating wear on gears, bearings, and hydraulic pumps. It also leads to oil leakage, causing environmental contamination and low oil levels.
Proper sealing of these openings is mandatory for warranty compliance and safety regulations. Replacing a damaged cover plate with genuine XCMG 380800372 restores full protection and fluid retention.
This plate also acts as a blast shield in case of internal component failure, containing fragments. Its robust steel construction adds structural rigidity to the housing.
Each 380800372 cover plate is stamped from high‑quality cold‑rolled steel using a progressive die. The stamping process creates a consistent, burr‑free edge and accurate hole locations.
The plate is then degreased and zinc‑nickel plated to provide sacrificial corrosion protection. A black epoxy powder coat is applied over the zinc‑nickel layer, increasing salt spray resistance to 560 hours.
The gasket groove is roll‑formed to a precise depth, ensuring proper O‑ring compression without over‑crushing. All mounting holes are countersunk to accept flat‑head screws or cap screws.
XCMG inspects every plate for flatness on a granite table and checks hole patterns using a go/no‑go fixture. Samples are tested for coating adhesion and salt spray resistance.
To replace a worn or damaged cover plate, first drain the oil or fluid level below the opening. Clean the housing flange and remove any old gasket material.
Inspect the mating surface for nicks or corrosion. Install a new O‑ring or gasket (not supplied) in the groove. Position the new 380800372 plate and insert bolts with anti‑seize compound.
Torque the bolts in a crossing pattern to 12‑15 Nm (M8 bolts) or 25‑30 Nm (M10 bolts). Do not overtighten – excessive torque can warp the plate and cause leaks.
Refill the fluid and run the grader to operating temperature, then re‑check for any leaks. If a leak persists, replace the gasket or check the flange flatness.
Never reuse an old gasket or an old cover plate – always install a genuine XCMG 380800372 for a guaranteed seal.
Visible cracks, deformation (warping) that prevents flat sealing, severely corroded or pitted surface, and stripped bolt holes that cannot hold torque.
Also replace if the gasket groove is damaged or if the powder coat is flaking around the seal area. A compromised cover plate will not maintain a reliable seal.
Inspect all cover plates during every fluid change (every 500 hours). Look for leaks, loose bolts, or signs of impact damage. Retorque bolts as needed.
XCMG recommends replacing the 380800372 cover plate every 5,000 operating hours or at the first sign of corrosion. In salt‑spray environments (coastal or winter road salt), replace every 2,500 hours.
Keep a spare plate in your parts inventory for emergency replacements. A simple cover plate failure can escalate into major component damage if ignored.
When replacing the cover plate, always use a fresh gasket or O‑ring. A hardened or flattened seal will leak even with a new plate.
Genuine XCMG 380800372 cover plates are backed by a 12‑month warranty. Regional warehouses: Houston (USA), Rotterdam (Netherlands), Dubai (UAE), and Shanghai (China).
Standard air freight delivers within 3‑7 business days worldwide. Emergency 24‑48 hour shipping available for urgent repairs. Bulk orders (10+ plates) receive volume discounts.
Aftermarket cover plates often use thinner steel (1.5‑2 mm vs. 3 mm), lack corrosion‑resistant coatings, and have inaccurate hole patterns. Genuine XCMG 380800372 ensures correct thickness, proper fit, and long‑term durability.
Don’t risk oil leaks, contamination ingress, or component failure – a missing or damaged cover plate is a costly oversight. Keep a genuine spare plate in your service truck for rapid field replacement.
Order the genuine XCMG 380800372 Cover Plate today and maintain full sealing integrity for your grader’s transmission, hydraulic system, and final drives.
Upgrade your motor grader’s reliability with XCMG genuine covers – precision stamped, double‑coated for corrosion protection, and guaranteed to fit.
