The genuine XCMG 380302221 Left Center Guard is a heavy‑duty steel protection plate designed for the moldboard assembly of XCMG GR series motor graders. This OEM 380302221 left center guard shields the critical center hinge area of the scraper body and the circle support brackets from impact damage, stone impingement, and material abrasion. Manufactured from abrasive‑resistant steel (Hardox 400 equivalent) with precision‑formed contours and countersunk bolt holes, the XCMG left center guard absorbs direct hits from rocks and debris that would otherwise deform the moldboard frame or damage the circle drive linkage. The 380302221 guard is a direct replacement for worn, cracked, or missing protective plates on XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders.
The left center guard is bolted to the rear face of the moldboard, directly behind the cutting edge center section. It prevents material build‑up and protects the hydraulic hoses and grease fittings located near the circle drive. A broken or missing guard exposes these critical components to rapid wear and impact failure. Replacing a damaged guard with genuine XCMG 380302221 restores full protection, reduces downtime, and extends the service life of the moldboard structure.
This guard also serves as a mounting point for side wear strips and contributes to the overall rigidity of the scraper body. XCMG 380302221 ensures perfect alignment with the existing bolt pattern and maintains the factory‑specified clearance around moving parts.
| Parameter | Specification |
|---|---|
| OEM Number | 380302221 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Left Center Guard / Moldboard Protection Plate |
| Material | Abrasion‑resistant steel (Hardox 400 or equivalent), 10 mm thick |
| Overall Length | 850 mm ±2 mm |
| Overall Height | 300 mm ±1.5 mm |
| Thickness | 10 mm (wear plate) + 6 mm mounting flange |
| Bolt Hole Pattern | 6 holes, Ø14.0 mm, countersunk for M12 plow bolts |
| Hardness (Plate) | 360‑420 HBW |
| Yield Strength (min) | 1000 MPa (145,000 psi) |
| Surface Finish | Bare steel with shop primer or zinc‑rich paint (240h salt spray) |
| Flatness Tolerance | ±1.5 mm over full length |
| Fabrication | Laser cut, pressed, robotic welded (ISO 5817) |
| Inspection | 100% dimensional check with CMM, magnetic particle of bolt holes |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 380302189, 380302200, 380302215 |
The 380302221 left center guard protects the most vulnerable area of the moldboard assembly – the central hinge zone where the circle connects to the blade frame. Without this guard, rocks can directly strike the hydraulic hoses, grease fittings, and the circle retention bolts.
A missing guard allows material to pack behind the moldboard, increasing wear on the rear face and potentially jamming the circle rotation. The guard also prevents water and abrasive dust from entering the pivot points.
Replacing a damaged guard with genuine XCMG 380302221 restores full coverage, reduces maintenance frequency, and protects expensive components like the circle drive splines and hydraulic lines.
Each 380302221 guard is laser‑cut from Hardox 400 plate, then formed on a CNC press brake to match the curved profile of the moldback. The countersunk bolt holes are milled precisely to accept plow bolts for flush mounting.
All external edges are ground smooth to prevent handling injuries. The guard is then shot‑blasted to remove mill scale and coated with a zinc-rich primer that survives 240 hours of salt spray testing.
XCMG inspects every guard with a template to verify hole alignment and flatness. A sample from each batch is pull‑tested to ensure the material hardness meets specification.
To replace a worn guard, park the grader on level ground and lower the moldboard to the ground. Remove the six plow bolts using a impact wrench. Clean the mounting surface on the moldboard.
Position the new 380302221 guard and insert new plow bolts with serrated lock nuts. Torque the M12 bolts to 120 Nm in a crossing pattern. Do not reuse old bolts – always use new hardware.
After installation, check that the guard does not contact any moving parts (circle, hoses). Apply anti‑seize to bolt threads to prevent corrosion and facilitate future removal.
Visible cracks across the plate, holes worn through from material abrasion, missing sections broken off from rock impact, and bent mounting flanges that prevent flush seating.
If the guard has become loose due to worn bolt holes, replace it immediately. A loose guard can fall off and become a safety hazard.
Inspect the left center guard every 500 operating hours or whenever you change the cutting edge. Look for cracks or thinning beyond 50% of original thickness (less than 5 mm).
Replace the guard every 2,000‑3,000 hours for typical road grading, or sooner if grading rocky material. Keep a spare 380302221 guard in stock to avoid extended downtime.
Check bolt torque every 250 hours – vibration from grading can loosen the fasteners. Retorque to 120 Nm as needed.
Genuine XCMG 380302221 guards come with a 12‑month warranty. Stocked in regional warehouses: Houston (North America), Rotterdam (Europe), Dubai (Middle East), Shanghai (Asia).
Air freight delivery within 3‑7 business days worldwide. Emergency 24‑48 hour shipping available. Bulk orders (10+ guards) receive volume discounts and sea freight options.
Aftermarket guards often use generic mild steel that wears out in months and has inaccurate bolt holes. Genuine XCMG 380302221 uses certified Hardox 400 for maximum abrasion life and precise fit. Order genuine today to protect your moldboard and circle components.
Don’t expose your grader’s expensive circle drive and hydraulic hoses to impact damage. The 380302221 left center guard is a low‑cost insurance policy against major repairs. Keep a spare guard in your parts inventory and replace at the first sign of wear.
Upgrade your motor grader’s moldboard protection with XCMG genuine guards. Laser‑cut, press‑formed, and abrasion‑resistant – order the 380302221 Left Center Guard now and ensure your blade frame stays straight, your hoses stay intact, and your grader keeps working.
