The 805603535 Pin (6×20) is a genuine OEM cylindrical locating pin manufactured by XCMG for motor graders and heavy construction equipment. This precision‑ground solid pin provides accurate alignment, load transfer, and pivot joint assembly on XCMG GR series graders.
Engineered from high‑strength carbon steel with a corrosion‑resistant zinc‑plated finish, the 805603535 pin is designed to withstand high shear loads, vibration, and environmental exposure. It directly replaces worn, bent, or missing pins in blade circle linkages, ripper assemblies, articulation joints, and control lever mechanisms.
Each pin is precision ground to an exact 6.0 mm diameter with a tight tolerance of -0.010 / -0.025 mm, ensuring a snug fit in reamed holes. The 20 mm overall length provides proper engagement while allowing for retaining rings or cotter pins. The chamfered ends facilitate easy assembly and prevent edge damage during installation.
| Parameter | Specification |
|---|---|
| OEM Number | 805603535 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Solid Cylindrical Pin / Dowel Pin |
| Nominal Diameter | 6.0 mm (h6 tolerance: -0.010 / -0.025 mm) |
| Overall Length | 20 mm (±0.15 mm) |
| Material | High‑strength carbon steel (C45 / 1045), heat treated |
| Surface Finish | Zinc plating + yellow chromate (500h salt spray) |
| Hardness (Rockwell) | HRC 25‑30 (through hardened) |
| Shear Strength | > 450 MPa |
| Tensile Strength | > 800 MPa |
| Edge Finish | Chamfered 0.5 × 45° at both ends |
| Surface Roughness (Ra) | ≤ 0.8 µm (ground finish) |
| Operating Temperature | -40°C to +120°C |
| Weight (each) | ≈ 4.5 g |
| Corrosion Resistance | 500+ hours salt spray (ASTM B117) |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 805603501, 805603512, 805603528 |
| Certifications | ISO 9001:2015, ISO 14001, CE |
The XCMG 805603535 Pin (6×20) is a precision cylindrical component used to locate and secure mating parts in motor grader assemblies. It serves as a pivot pin in control linkages, a dowel pin for aligning gearboxes and covers, or a shear pin in overload protection devices. The tight diametral tolerance (h6 grade) ensures minimal radial play, reducing wear and noise.
Typical applications include blade lift control linkages, circle rotation gearbox alignment, hydraulic valve lever pivots, and articulation joint secondary pins. The 805603535 pin is designed to be retained by a retaining ring, cotter pin, or interference fit, depending on the specific assembly.
When original pins become worn, bent, or corroded, replacing them with genuine XCMG parts restores proper alignment and load capacity. A worn pin can cause excessive play, leading to accelerated bushing wear, misalignment, and unpredictable machine behavior. The 805603535 is manufactured to original equipment specifications.
Each 805603535 pin is produced from cold‑drawn C45 carbon steel bar, then centerless ground to achieve the exact 6.0 mm diameter with a tolerance of -0.010 / -0.025 mm. The grinding process produces a smooth surface finish (Ra ≤ 0.8 µm) that minimizes friction and wear on mating bushings. After grinding, the pins are cut to 20 mm length and both ends are chamfered 0.5 mm × 45° to eliminate sharp edges.
The pins are then through‑hardened to HRC 25‑30 using a controlled atmosphere furnace, then tempered to achieve the optimal balance of hardness and toughness. Hardness is verified using a Rockwell tester on each batch. Finally, the pins are zinc plated with yellow chromate, providing 500+ hours of salt spray resistance per ASTM B117.
XCMG subjects each batch to a proof load test (shear test at 10 kN) and a dimensional audit using laser micrometers. Pins that do not meet the h6 tolerance are rejected. This ensures consistent quality and interchangeability with original components.
Replacing a worn or damaged pin is straightforward. Remove the retaining ring, cotter pin, or set screw that secures the pin. Use a drift punch of appropriate size (5 mm) to drive the old pin out of its hole. Clean the bore with a reamer or wire brush to remove burrs, rust, or old grease. Lightly oil the new 805603535 pin and slide it into place by hand.
If the pin is intended to be an interference fit (e.g., dowel pin), drive it in using a brass or plastic hammer. Never strike the pin directly with a steel hammer; use a drift pin of slightly smaller diameter. For pivot pins, ensure the pin is free to rotate after installation. Reinstall the retaining device (circlip, cotter pin, or set screw).
After assembly, check for axial play and radial movement. Acceptable play is 0.05‑0.15 mm for pivot applications. If play exceeds this, the mating hole may be worn and require reaming to an oversize pin. XCMG offers oversized pins for such repairs.
Aftermarket pins are often made from low‑carbon steel that bends under shear load, or they lack proper heat treatment, resulting in rapid wear. The genuine XCMG pin is manufactured from heat‑treated C45 steel, providing the hardness and toughness required for heavy equipment applications. Aftermarket pins may also have inconsistent diameters, causing either binding (too large) or excessive play (too small).
Counterfeit pins often have a simple bright zinc plating that corrodes quickly, leading to rust jacking and seizure. The 805603535 features a yellow chromate conversion coating over zinc, providing over 500 hours of salt spray resistance. Additionally, genuine pins have chamfered edges that facilitate assembly; many aftermarket pins have sharp corners that damage seals or bores.
XCMG provides a 12‑month warranty against manufacturing defects. Each pin is stamped with the XCMG logo or comes in branded packaging. This supersedes older numbers 805603501 and 805603512, with improved corrosion resistance and tighter diameter tolerance.
Common indicators that a pin needs replacement: visible wear grooves on the pin surface, rust pitting, bending (even slight), or excessive radial play when assembled. Also, if the pin can be easily moved axially (when it should be a light press fit), the pin or the bore is worn.
Preventive replacement every 4,000 operating hours is recommended for pins in high‑cycle applications (control linkages, blade circle). The cost of a genuine pin is minimal compared to the cost of a failed bushing, a bent lever, or a mis‑graded road.
During routine maintenance, inspect pins when disassembling any linkage or pivot. Replace any pin that shows signs of wear or corrosion. Keep a stock of 805603535 pins in your parts inventory for rapid field repairs.
The 805603535 Pin is stocked in XCMG regional warehouses in North America (Houston), Europe (Rotterdam), Middle East (Dubai), and Asia (Shanghai). Standard air freight delivers within 3‑7 business days worldwide. Expedited shipping (1‑2 days) is available for urgent repairs.
Bulk orders (50+ pins) receive volume discounts and can be shipped via sea freight. Each pin is individually wrapped in anti‑corrosion paper or supplied in sealed plastic bags. For large fleets, consignment stock programs are available to ensure immediate availability.
Don’t let a worn or corroded pin compromise machine precision. Order the genuine XCMG 805603535 Pin 6×20 today and restore accurate alignment and load transfer.
The 805603535 Pin may be a small component, but it is critical for maintaining tight tolerances and reliable operation in your motor grader’s control linkages and pivot joints. Keep spare pins in your service truck for every repair, and always replace with genuine XCMG parts.
Upgrade your motor grader’s precision and reliability with the XCMG genuine pin. Engineered for strength, accuracy, and corrosion resistance – order now and experience the quality that keeps your grader productive.
