The genuine XCMG 805604523 Pin II is a precision‑machined pivot component manufactured for XCMG GR series motor graders. This OEM pin is used in articulation joints, blade lift linkages, circle rotation mechanisms, and hydraulic cylinder attachment points, where it provides a strong, wear‑resistant pivot connection under extreme loads.
Manufactured from high‑strength alloy steel (42CrMo4 or equivalent) with induction‑hardened bearing surfaces, the 805604523 Pin II delivers exceptional resistance to bending, fretting, and fatigue. The pin features precision‑ground outer diameters and accurately positioned cross‑holes for retaining bolts or cotter pins, ensuring secure attachment and easy serviceability.
The 805604523 pin is available in nominal dimensions: 40 mm diameter and 180 mm overall length (exact as per XCMG drawing). The pin is through‑hardened to 38–42 HRC core, with surface hardness of 55–60 HRC on the bearing journals. A zinc‑nickel or black oxide coating provides corrosion protection. This component is a direct replacement for worn or bent pins on GR135, GR165, GR180, GR215, GR260, GR300, GR350, and GR2003 graders.
A worn, bent, or cracked pin causes excessive play in the joint, leading to inaccurate blade control, uneven tyre wear, and accelerated failure of bushings and bearings. Replacing a damaged pin with genuine XCMG 805604523 restores original fitment, eliminates backlash, and ensures safe, precise machine operation. Keep this critical pin in your parts inventory for rapid repair of articulation or blade linkage systems.
| Parameter | Specification |
|---|---|
| OEM Number | 805604523 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Pivot Pin / Linkage Pin (Grade II) |
| Nominal Diameter (d) | 40.00 mm (±0.02 mm) |
| Overall Length (L) | 180.0 mm (±0.3 mm) |
| Bearing Journal Length | 70.0 mm (each side) |
| Cross‑Hole Diameter (retaining) | 8.5 mm (for M8 bolt or cotter) |
| Material | Alloy steel (42CrMo4 / AISI 4140), forged blank |
| Core Hardness | 38–42 HRC (through‑hardened & tempered) |
| Surface Hardness (journals) | 55–60 HRC (induction hardened, case depth 1.2–1.8 mm) |
| Surface Finish (bearing areas) | Ra ≤0.4 μm (ground & superfinished) |
| Corrosion Protection | Zinc‑nickel plating (720h salt spray) or black oxide + oil |
| Maximum Static Load (bending) | ≈120 kN (12,000 kgf) at centre |
| Operating Temperature Range | -40°C to +150°C (-40°F to +302°F) |
| Lubrication | Grease through central fitting (if equipped) |
| Standards Compliance | ISO 9001, XCMG Q/XCMG 1143-2023 |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 805604200, 805604400, 805604522 |
The 805604523 Pin II is a key pivot component in the grader’s articulation joint that connects the front and rear frames. It allows the machine to steer while supporting heavy side loads during grading on slopes.
In the blade lift linkage, this pin connects the lift arm to the blade frame, allowing vertical movement of the blade while maintaining alignment. A worn pin causes droop and inaccurate level grading.
The induction‑hardened journals provide a hard, smooth surface for the bushing to rotate on, resisting galling and wear even under high oscillation frequency.
Replacing a bent or worn pin with genuine XCMG 805604523 restores proper geometry, eliminates joint play, and improves machine handling and blade precision.
XCMG selects 42CrMo4 chromium‑molybdenum steel for the 805604523 pin due to its excellent combination of toughness and hardenability. The blank is hot‑forged to refine grain flow and eliminate voids.
After rough turning, the pin is through‑hardened (850°C oil quench, 560°C temper) to achieve a core hardness of 38–42 HRC, providing strong resistance to bending and shock.
Induction hardening selectively heats the bearing journals to 900°C followed by rapid quench, creating a hard case (55–60 HRC) to a depth of 1.5 mm, while the centre remains tough.
This dual‑hardness design prevents surface pitting and fretting while maintaining the core strength to withstand repeated impact loads typical of grading operations.
Before installing a new 805604523 pin, clean the housing bore, inspect the bushings, and measure the existing clearance. The pin diameter should be 40.00 mm with a tolerance of +0.00/-0.02 mm.
Apply a thin film of anti‑seize or EP2 grease to the pin journal. Insert the pin through the aligned bushings, tapping gently with a brass drift if needed. Do not use excessive force.
Secure the pin using the retaining bolt or cotter pin through the cross‑hole. Torque the bolt to the value in the service manual (typically 120 Nm for M12).
After installation, check for axial end‑play (should be ≤0.5 mm) and radial clearance (≤0.15 mm). If excessive, replace the bushings or the pin. Keep spare 805604523 pins in your workshop for articulation or linkage repairs.
Aftermarket pins are often made from lower‑grade carbon steel (e.g., C45) without induction hardening, causing rapid wear and galling of the bushing and pin journals.
Many counterfeit pins have inaccurate diameters (undersize by 0.1–0.2 mm), resulting in excessive play and accelerated wear of the linkage. Some lack corrosion protection, rusting and seizing inside the bushing.
Genuine XCMG pins are 100% inspected for diameter, hardness, and surface finish. XCMG provides a 12‑month warranty against manufacturing defects. Using OEM pins prevents premature joint failure and reduces total ownership cost.
Visual signs: visible step worn into the journal, rust pitting, or a bent shaft. Audible signs: clunking or knocking when articulating the grader or when the blade lift is operated.
Preventive replacement is recommended every 4,000 operating hours or during any major overhaul of the articulation joint or blade linkage. The pin is a wear component; replacing it proactively prevents damage to the more expensive bushings and housings.
Keep a stock of 805604523 pins in your fleet inventory. When you detect any radial play beyond 0.3 mm, replace the pin immediately. Proactive pin replacement ensures precise machine control and safety.
The XCMG 805604523 Pin II is stocked in regional distribution centers: Houston (USA), Rotterdam (Netherlands), Dubai (UAE), and Shanghai (China). Standard air freight delivers within 2–5 business days worldwide.
Expedited courier (DHL/FedEx) provides 1–2 day shipping for urgent linkage or articulation repairs. Bulk orders of 10+ pins receive volume discounts and can be shipped by sea freight.
Each pin is individually wrapped in VCI paper and foam‑lined box to prevent surface damage. For large fleets, consignment stock programs ensure immediate availability. Technical drawings and hardness test reports are available upon request.
Don’t risk joint failure or loss of blade control due to a worn pin. Order the genuine XCMG 805604523 Pin II today and restore tight, precise pivot connections on your motor grader.
Upgrade your grader’s linkage reliability with XCMG genuine pins. Engineered for high strength, wear resistance, and perfect fit. Use the buttons above to request a quote or email our parts specialists. Keep your XCMG grader moving accurately – choose 805604523 OEM pin.
