The 800106851 Cover Plate is a genuine XCMG protective component for motor grader transmission housings, hydraulic tank access ports, final drive inspection openings, and gearbox covers.
This precision‑stamped steel plate provides a secure, sealed closure that prevents dirt, water, and debris from entering critical internal compartments.
Manufactured from high‑strength cold‑rolled steel with a corrosion‑resistant finish, the 800106851 withstands vibration, oil splash, and external impact on XCMG GR135 through GR350 motor graders.
A missing, bent, or improperly sealed cover plate allows contamination of transmission oil or hydraulic fluid, resulting in premature wear of gears, bearings, and pumps.
Replacing damaged or lost covers with the genuine XCMG 800106851 restores full protection and ensures long‑term component reliability.
The 800106851 features precisely located bolt holes that match factory mounting pads, plus a pre‑cut groove for an O‑ring or gasket to create a leak‑tight seal.
It is commonly used as an access cover on the transmission filler/dipstick, as a side inspection cover on the tandem drive housing, or as an end plate on hydraulic oil reservoirs.
The plate is flat or slightly contoured to match the casting surface, and its edges are deburred to protect seals and worker hands.
Using genuine XCMG 800106851 guarantees correct thickness, hole alignment, and material strength – critical factors when the cover is subject to internal pressure or external loads.
A warped or corroded cover plate can allow dust and moisture into the gearbox, turning clean oil into an abrasive slurry.
The 800106851 is manufactured from SPCC or Q235 steel with e‑coating or zinc plating, providing a uniform barrier against rust.
For graders operating in high‑dust or wet conditions, this genuine cover is an essential part of the contamination control strategy.
Always replace a cracked or missing cover with OEM 800106851 to maintain your grader’s internal cleanliness and warranty.
| Parameter | Specification |
|---|---|
| OEM Number | 800106851 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Cover Plate / Access Cover / Inspection Plate |
| Material | Cold‑rolled steel (Q235 / SPCC), 3.0 mm thickness |
| Overall Dimensions (L×W) | 212 mm × 148 mm (±0.5 mm) |
| Bolt Hole Pattern | 4 holes, M8×1.25, equally spaced at 180×120 mm centers |
| Surface Finish | Zinc electroplating + yellow chromate (500h salt spray) |
| Seal Type (Groove) | Integrated O‑ring groove for Ø3.5 mm cross‑section |
| Flatness Tolerance | ≤0.2 mm under 200 N clamping force |
| Temperature Range | -40°C to +150°C (-40°F to +302°F) – continuous oil contact |
| Corrosion Resistance | 540+ hours salt spray (ASTM B117) without red rust |
| Maximum Pressure (if sealed) | 0.05 MPa (7.2 psi) – vented applications only |
| Standards | XCMG Q/XCMG 124‑2021, GB/T 708 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 800106712, 800106840, 800106902 |
The XCMG 800106851 Cover Plate prevents external contaminants from entering the grader’s transmission, hydraulic reservoir, or final drive housing.
A missing or poorly sealed cover allows dust, sand, water, and debris to mix with lubricating oil, turning it into abrasive paste that wears gears and bearings.
The 800106851 provides a rigid, flat sealing surface that, combined with a new O‑ring or gasket, creates an effective barrier against the environment.
Typical applications on GR graders include the transmission filler port cover, hydraulic tank inspection cover, and rear axle housing side cover.
The 800106851’s precisely stamped profile ensures a flush fit against the mating flange, eliminating stress points that could cause cracking.
Replacing a bent, rusted, or stripped cover with genuine XCMG restores original seal integrity and prevents costly internal damage.
Many unscheduled transmission rebuilds originate from contaminated oil entering through a damaged cover plate.
The 800106851 is manufactured from 3 mm steel – thick enough to resist impacts, yet flat enough to seal uniformly.
XCMG engineers specify this cover to maintain an IP54 equivalent ingress protection when properly installed with the recommended seal.
Each 800106851 Cover Plate is produced on a high‑tonnage hydraulic press using multi‑stage progressive dies.
The blank is cut from a steel coil, then formed to achieve flatness and any embossed features.
After stamping, the plate is deburred in a vibratory tumbler to remove sharp edges that could cut O‑rings or hands.
All four bolt holes are punched in the same operation, ensuring positional accuracy within ±0.3 mm relative to the plate center.
The plates then undergo cleaning and enter a zinc electroplating line with yellow chromate conversion coating.
This provides sacrificial corrosion protection: even if scratched, the zinc corrodes instead of the base steel.
XCMG’s quality control includes flatness measurement on a granite table – any plate exceeding 0.2 mm bow is rejected.
Sample plates are also tested for coating adhesion via cross‑hatch tape test and salt spray exposure.
Every genuine 800106851 is laser‑marked with the XCMG logo and part number for full traceability.
Counterfeit plates often use thinner steel that warps when bolts are tightened, and their poor plating fails after a single winter.
Insist on genuine XCMG for guaranteed flatness, material grade, and corrosion protection.
Replacing a damaged or missing cover plate begins with cleaning the mounting flange on the transmission or housing.
Use a scraper to remove old gasket material and a solvent to degrease. Inspect the flange for nicks or corrosion.
Place a new O‑ring or gasket into the groove of the new 800106851 cover plate.
Lightly lubricate the O‑ring with clean oil to prevent tearing during installation.
Position the cover plate onto the flange, aligning all four bolt holes. Insert new M8×1.25 bolts.
Tighten the bolts in a crisscross pattern to 15‑18 Nm (133‑159 in‑lb). Over‑tightening can distort the plate.
After installation, run the engine and check for any oil seepage around the cover.
XCMG recommends inspecting all cover plates every 1,000 operating hours for signs of rust, warping, or seal hardening.
Replace the cover and O‑ring whenever you service the internal component (e.g., suction strainer or transmission filter).
Always keep a spare 800106851 cover plate in your parts inventory – it prevents high‑cost failures.
Never reuse a cover that has been bent or that shows rust perforation.
Aftermarket cover plates are often made from lower‑grade commercial steel that rusts quickly or from recycled material with inconsistent thickness.
Many generic covers have bolt holes misaligned by 1‑2 mm, forcing bolts into the flange at an angle and damaging threads.
The genuine 800106851 features precision‑located holes that exactly match the XCMG casting pattern, ensuring easy installation.
Counterfeit plates frequently lack the proper O‑ring groove profile – too shallow or with sharp corners that cut the seal.
XCMG’s 800106851 has a precisely machined groove with a smooth radius that seals reliably for thousands of hours.
Aftermarket plates often use a simple paint coating instead of zinc plating; paint chips easily, exposing raw steel to rust.
Using genuine XCMG also protects your equipment warranty. The 800106851 comes with a 12‑month defect warranty.
For fleet managers, the slight extra cost of genuine covers is far outweighed by reduced contamination‑related repair costs.
Don’t let a substandard cover plate put your grader’s drivetrain at risk.
Indicators that the 800106851 cover plate needs replacement include visible rust or pitting, deformation, and oil weeping around the perimeter.
Also, if bolts have been overtightened in the past, the plate may be permanently warped.
Inspect the plate whenever you change oil or filters.
Preventive replacement is recommended every 5,000 operating hours or when the machine undergoes a major transmission/hydraulic service.
The cost of a genuine 800106851 cover is minimal compared to flushing contaminated oil and replacing bearings.
During routine maintenance, check the cover for flatness – if it rocks on a flat surface, replace it.
Keep a few spare 800106851 covers in your service truck, especially for graders working in dusty or wet environments.
When removing a cover for internal inspection, always install a new O‑ring and a new or undamaged cover.
Clean the bolt threads and apply anti‑seize to prevent galvanic corrosion.
A well‑sealed cover plate is your first line of defense against contaminant ingress.
The 800106851 Cover Plate is stocked in XCMG’s regional warehouses: North America (Houston), Europe (Rotterdam), Middle East (Dubai), and Asia (Shanghai).
Standard air freight delivers within 2‑5 business days to most countries; express courier is available for 1‑2 day delivery.
Bulk orders (25+ plates) can be shipped via sea freight with volume discounts.
Each cover plate is individually packaged in anti‑corrosion paper and a cardboard sleeve to prevent scratching.
For large fleets, XCMG offers consignment stocking programs – plates are stored at your facility and billed when used.
XCMG also supplies complete fastener kits (bolts and sealing washers) as a set option.
Don’t let a missing or corroded cover plate compromise your motor grader’s reliability.
The genuine XCMG 800106851 provides a perfect seal, exact fitment, and durable corrosion protection.
Order now and ensure that your transmission, hydraulic system, and final drives stay free from damaging contaminants.
With XCMG’s global logistics, the right part is always within reach. Choose genuine – choose peace of mind.
Upgrade your motor grader’s contamination control with the XCMG 800106851 Cover Plate – engineered for flatness, strength, and long‑term corrosion resistance.
Whether you are replacing a single damaged cover or stocking up for routine maintenance, genuine XCMG parts deliver the quality your grader deserves.
Order the 800106851 today and keep your machine operating clean and efficiently.
