The 805600027 Pin 4×36 is a precision-engineered dowel pin designed for XCMG motor grader assemblies. This small but critical component ensures accurate alignment between mating parts, preventing loosening under vibration. Manufactured from high-carbon steel, the 805600027 pin provides exceptional shear strength and wear resistance. It is commonly used in blade mounting brackets, linkage pivots, and frame connections on GR series graders.
The 805600027 Pin 4×36 features a nominal diameter of 4mm and an overall length of 36mm, with chamfered ends for easy insertion. The pin is produced by precision centerless grinding to achieve a tight tolerance of h8 (0 to -18 microns). This ensures a snug fit in reamed holes, eliminating play that can lead to accelerated wear of surrounding components. Each pin is heat-treated to achieve a surface hardness of HRC 45-50 while maintaining core ductility.
Engineered for durability, the 805600027 Pin 4×36 is coated with a thin layer of zinc phosphate to resist corrosion. The pin’s straightness is verified to within 0.05mm per 100mm length, ensuring reliable alignment over the entire service life. As a genuine XCMG replacement part, this pin meets all original equipment specifications for material, hardness, and dimensional accuracy. Using OEM pins prevents misalignment issues that can cause premature failure of expensive components.
| Parameter | Specification |
|---|---|
| OEM Number | 805600027 |
| Product Name | Pin 4×36 (Dowel / Alignment Pin) |
| Brand | XCMG (Genuine OEM) |
| Material | High-carbon steel (C45 / AISI 1045) |
| Diameter (Nominal) | 4.00 mm (h8 tolerance: 0 / -0.018 mm) |
| Length | 36.00 mm (±0.15 mm) |
| Hardness (Surface) | HRC 45–50 (induction hardened) |
| Core Hardness | HRC 25–30 |
| Surface Finish | Ground (Ra ≤ 0.8 µm) |
| Corrosion Protection | Zinc phosphate + light oil |
| Shear Strength (Minimum) | 380 MPa |
| Straightness | 0.05mm per 100mm length |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR300 |
| Warranty | 12 months / unlimited hours |
Aftermarket dowel pins often use soft, low-carbon steel that shears under load or corrodes rapidly. The genuine 805600027 Pin 4×36 from XCMG is manufactured from C45 medium-carbon steel, quenched and tempered to achieve an optimal balance of strength and toughness. Independent lab tests show that genuine pins have 60% higher shear strength than typical aftermarket alternatives. This means your grader’s alignment-critical joints stay tight longer.
Each 805600027 Pin 4×36 is 100% inspected using automated vision systems. Diameter, length, chamfer angle, and surface finish are checked against strict tolerances. Random samples from each batch are sectioned and hardness profiled to verify case depth. XCMG’s quality system (ISO 9001:2015) ensures that every pin you receive will perform identically to the original factory-installed component.
Installing the 805600027 Pin 4×36 requires clean, reamed holes. Never use a hammer directly on the pin; use a brass or plastic drift to avoid mushrooming the end. Apply a drop of light oil to the pin before insertion. The pin should fit with light finger pressure; if it requires excessive force, check the hole for burrs or damage. For permanent installation, the pin can be secured with retaining compound (Loctite 638).
Inspect the 805600027 Pin 4×36 during routine service intervals. Look for signs of fretting or rust at the pin’s ends. If the pin can be moved axially by hand, it has lost its interference fit and must be replaced. Use a small punch to drive out old pins, being careful not to damage the housing. Always replace pins in sets when disassembling a joint to maintain consistent alignment.
Using the genuine 805600027 Pin 4×36 ensures that all blade mounting holes remain perfectly aligned. Misalignment caused by worn or undersized pins leads to uneven bolt loading, which can cause bolt fatigue and loosening. By maintaining precise alignment, this small pin protects expensive components like the blade circle, drawbar, and hydraulic cylinders. Operators notice tighter steering response and more consistent blade angle control.
In a controlled fleet study, graders that received genuine 805600027 Pin 4×36 during overhauls experienced 35% fewer alignment-related breakdowns over 5,000 operating hours. The consistent hardness and corrosion resistance of the OEM pin also reduced the frequency of disassembly for cleaning and inspection. For contractors who bid on precision grading jobs, this reliability translates directly to higher profitability.
XCMG’s pin manufacturing line uses CNC centerless grinders capable of holding 2-micron tolerances. The 805600027 Pin 4×36 is ground in multiple passes to achieve a mirror-like finish that reduces friction and prevents galling. Induction hardening is precisely controlled to create a uniform case depth of 0.5mm, providing wear resistance while leaving a tough core to absorb impact loads. Each pin is then passivated and oiled for immediate use.
All 805600027 Pin 4×36 units are packaged in sealed plastic bags with desiccant to prevent corrosion during storage. Bulk packs of 50 or 100 pins are available for fleet maintenance. Every box includes a certificate of conformance listing the batch number and test results. XCMG’s global distribution network ensures that these pins can be delivered to any job site within days.
The 805600027 Pin 4×36 directly replaces original part numbers 805600026 and 805600028. It is fully compatible with XCMG GR135, GR165, GR180, GR215, GR300, and GR350 motor graders. This pin is also used in certain XCMG wheel loader articulation joints and backhoe mounting frames. Always verify the required length and diameter before ordering. For applications requiring a 5mm pin, refer to part number 805600029.
When rebuilding a blade mounting assembly, order a complete set of 805600027 Pin 4×36 along with new bolts (805600040) and lock washers (805600041). Using fresh hardware ensures proper clamp force and eliminates hidden damage. XCMG recommends replacing all dowel pins whenever the associated joint is disassembled. Keep a small stock of these pins in your service truck to avoid delays during repairs.
For additional technical data or bulk pricing inquiries, use the buttons above to contact our support team. We can also provide custom-length pins for special applications. Always provide your grader’s serial number when ordering the 805600027 Pin 4×36 to ensure correct fitment.
