The 382100587 Retaining Block is a genuine XCMG mechanical component designed for precise axial and radial positioning of critical assemblies in motor graders. This high‑strength block, also known as a locking block or stop block, is used in the circle rotation support, blade lift linkage, and articulation joints of XCMG GR series graders. Manufactured from hardened alloy steel with wear‑resistant properties, the 382100587 retaining block provides secure locking against vibration and shock loads, preventing unwanted movement of adjustment mechanisms and pivot pins.
The 382100587 retaining block directly replaces worn, cracked, or deformed blocks in XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders. Typical applications include the circle anti‑rotation lock, blade pivot stop, and drawbar support block. The block features precision‑machined mounting surfaces and accurately positioned bolt holes, ensuring drop‑in fitment without modification.
A damaged or missing retaining block allows component drift, leading to excessive play in the circle or blade linkage, poor grade control, and accelerated wear of pins and bushings. Replacing a faulty block with the genuine XCMG 382100587 restores precise positioning, eliminates drift, and protects your grader’s structural alignment.
| Parameter | Specification |
|---|---|
| OEM Number | 382100587 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Retaining Block / Locking Block / Stop Block |
| Material | High‑strength alloy steel (40Cr / AISI 5140), hardened & tempered |
| Hardness (HRC) | 42 – 48 HRC (through‑hardened) |
| Overall Dimensions (L×W×H) | 95 mm × 55 mm × 28 mm (±0.2 mm) |
| Mounting Hole Diameter | 2 × 12.5 mm (clearance for M12 bolts) |
| Hole Spacing (center to center) | 70 mm (±0.1 mm) |
| Working Face Flatness | ≤ 0.05 mm (ground finish) |
| Surface Finish (Ra) | ≤ 1.6 µm (milled and finished) |
| Corrosion Protection | Zinc plating + black oxide (200h salt spray) |
| Max. Static Load Capacity | 80 kN (compressive / shear) |
| Operating Temperature Range | -50°C to +130°C (-58°F to +266°F) |
| Standards | XCMG drawing 382100587 / ISO 2768‑m |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 382100501, 382100545, 382100570, 382100583 |
The XCMG 382100587 retaining block is installed between fixed frame structures and moving components such as the circle rotation ring or blade lift arm. Its primary function is to positively locate adjustment wedges or to act as a mechanical stop that limits travel, preventing over‑extension of hydraulic cylinders or misalignment of the circle.
Without a securely fastened retaining block, the circle can rotate beyond its intended range, causing the blade to contact the frame or tires. In blade linkages, a missing block allows the lift arm to shift laterally, resulting in uneven blade pitch and increased wear on pivot bearings.
The 382100587 block is case‑hardened to resist indentation from the high contact pressures generated by circle rotation thrust forces. Replacing a worn block with the genuine XCMG part restores factory‑specified limit positions, improves operator control, and prevents structural damage.
Each 382100587 retaining block is machined from 40Cr alloy steel (AISI 5140 equivalent), which offers an excellent combination of strength, toughness, and wear resistance. The steel is first normalized to relieve internal stresses, then precision milled to final dimensions.
The block is through‑hardened to 42–48 HRC using a quench‑and‑temper process. This hardness level provides high resistance to deformation under impact loads while maintaining sufficient ductility to avoid brittle fracture. After heat treatment, the critical locating faces are surface ground to ensure flatness within 0.05 mm.
All edges are deburred and chamfered to prevent stress risers. The block then receives a zinc plating with a black oxide final finish, providing 200 hours of salt spray corrosion resistance. XCMG’s quality control includes 100% hardness testing and dimensional inspection using CMM.
To replace the 382100587 retaining block, first relieve any hydraulic pressure in the circle or blade lift circuit. Remove the existing block by unscrewing the two mounting bolts. Clean the mounting surface on the frame or support bracket – remove any rust, old gasket material, or burrs.
Position the new retaining block onto the mounting face. Apply a thread locking compound (medium strength) to the new M12 bolts. Torque the bolts to 55–65 N·m in a cross pattern. Use a feeler gauge to ensure no gap exists between the block and its mating surface – a gap indicates warpage or debris.
After installation, check the clearance between the block and the adjacent moving component. The service manual specifies a gap of 0.5–1.5 mm for proper operation. Cycle the circle or blade linkage several times to verify that the block functions as a stop without binding. Re‑tighten bolts after the test.
Common indicators that the 382100587 retaining block requires replacement include: visible wear grooves or indentations on the block face, cracks radiating from the bolt holes, deformation (bent or twisted shape), and excessive movement of the component it is supposed to restrain (e.g., circle rotation beyond normal range).
If the block is missing entirely, the grader may experience sudden, uncontrolled movement of the circle or blade, posing a safety hazard. Do not weld or repair a cracked block – stress risers from welding will lead to rapid failure. Always replace with a genuine new 382100587 block.
Aftermarket retaining blocks are often fabricated from mild steel (e.g., A36) that lacks the hardness required to resist indentation. Within months, the block’s surface can deform, increasing clearance and allowing component drift. Some counterfeit blocks have inaccurate hole spacing, making installation difficult or causing bolt binding.
Genuine XCMG 382100587 blocks are manufactured to exact drawings, with hardened alloy steel and accurate geometry. Each batch is tested for hardness, flatness, and tensile strength. The block is marked with the XCMG logo and part number for traceability.
XCMG offers a 12‑month warranty against manufacturing defects. Using genuine XCMG retaining blocks ensures proper mechanical stops, reduces operator fatigue from excessive play, and extends the life of related pins and bushings. Protect your grader’s precision with genuine parts.
Inspect the 382100587 retaining block every 500 operating hours or during any circle/blade linkage service. Check for cracks using dye penetrant or magnetic particle inspection, especially around the bolt holes. Measure the block thickness with a caliper – if worn more than 0.5 mm below nominal, replace it.
Also inspect the mating surface on the frame or stop bracket for indentation. If the bracket is worn, it may need resurfacing or replacement. Always replace the retaining block when replacing circle wear pads or blade lift bushings, as the block often sees increased loading during those procedures.
Keep a spare 382100587 retaining block in your parts inventory for immediate replacement. Torque bolts to specification at each inspection – loose bolts can lead to block movement and accelerated wear. A well‑maintained retaining block ensures that your grader’s circle and blade remain precisely where the operator places them.
The 382100587 Retaining Block is stocked in XCMG regional warehouses: Houston (North America), Rotterdam (Europe), Dubai (Middle East), and Shanghai (Asia). Standard air freight delivers within 3‑7 business days; expedited 1‑2 day shipping is available for urgent repairs. Bulk orders (10+ blocks) receive volume discounts.
Each block is individually wrapped in VCI paper and packed in a foam‑lined carton to prevent surface damage. For large fleets, consignment stock programs are available to ensure immediate availability and reduce maintenance delays. Don’t let a worn retaining block cause circle drift or blade misalignment.
Order the genuine XCMG 382100587 Retaining Block today and restore positive mechanical stops in your motor grader. Whether you are rebuilding the circle support or replacing a damaged stop, the 382100587 ensures correct fit, proper hardness, and long‑term reliability. Keep your grader operating safely and precisely.
Upgrade your grader’s structural integrity with OEM‑grade XCMG components. The 382100587 retaining block reflects XCMG’s commitment to quality – from material selection to final inspection. Trust genuine parts to keep your GR series motor graders productive, accurate, and ready for the toughest grading tasks.
