The genuine XCMG 381600105 Pin is a high‑strength, precision‑ground pivot shaft designed for motor grader circle drawbars, blade lift linkages, articulation joints, and steering knuckles. This OEM 381600105 pin is manufactured from case‑hardened alloy steel (42CrMo4) with induction‑hardened wear zones and a black oxide finish for corrosion resistance. The pin features a machined grease groove, chamfered ends, and a retaining ring groove for positive locking. Engineered for XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders, the 381600105 pin withstands high shear and bending loads while providing a smooth bearing surface for bronze bushings. This pin is a direct replacement for worn or bent pivot shafts in the circle drive housing, drawbar attachment, and articulation hinge.
The pin connects critical moving components, allowing articulation and rotation while transmitting heavy forces. A worn or scored pin accelerates bushing wear, creates excessive play, and leads to poor grading accuracy. Replacing a damaged pin with genuine XCMG 381600105 restores original clearances, eliminates knocking, and extends the life of mating bronze bushings and housings.
This pin also serves in blade cylinder mounts and side‑shift linkage pivot points. XCMG 381600105 ensures consistent fit, proper lubrication distribution, and long service life in severe operating conditions.
| Parameter | Specification |
|---|---|
| OEM Number | 381600105 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Pivot Pin / Cylindrical Shaft / Joint Pin |
| Material | Alloy steel (42CrMo4 / AISI 4140), forged |
| Heat Treatment | Through‑hardened + induction hardened bearing surfaces |
| Surface Hardness (Wear Zones) | 52‑56 HRC (case depth 2.0‑2.5 mm) |
| Core Hardness | 30‑36 HRC |
| Nominal Diameter | 45.00 mm +0.025 / -0.000 mm (ground finish) |
| Overall Length | 210 mm ±0.5 mm |
| Grease Groove Configuration | Single circumferential groove, 6 mm wide × 1.5 mm deep, with cross‑drilled lubrication hole (Ø3 mm) |
| Chamfer Dimensions | 2.5 mm × 45° at both ends |
| Retaining Features | One groove for external circlip (Ø42 mm), one 5 mm cross‑hole for cotter pin (optional) |
| Surface Finish (Ground) | Ra ≤ 0.4 µm |
| Straightness Tolerance | ≤ 0.05 mm over full length |
| Corrosion Protection | Black oxide + oil dip (240h salt spray) |
| Shear Strength (min) | 85 kN (19,100 lbf) |
| Operating Temperature Range | -40°C to +150°C |
| Non‑Destructive Testing | 100% magnetic particle inspection |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 381600089, 381600096, 381600101 |
The 381600105 pin serves as the primary pivot axis for the circle drawbar connection to the main frame, allowing the entire blade assembly to rotate while resisting bending and shear loads.
In articulation joints, the pin connects the front and rear frames, enabling steering articulation while maintaining structural integrity. A worn pin causes steering wander and uneven tire wear.
The pin also secures blade lift cylinders and side‑shift linkages. Loose or bent pins cause misalignment, oil seal damage, and accelerated wear of cylinder rod ends.
Without a properly functioning pin, the entire joint can fail, leading to expensive repairs and extended downtime. Replacing a damaged pin with genuine XCMG 381600105 restores rigidity and precision.
Each 381600105 pin is forged from 42CrMo4 steel, which provides high impact toughness and fatigue resistance. Forging aligns grain flow with the pin’s contour, eliminating weak points.
After rough machining, the pin is through‑hardened then tempered to 34 HRC. The bearing zones are induction hardened to 54 HRC, creating a wear‑resistant surface with a tough ductile core.
The grease groove and lubrication hole are machined after heat treatment. The pin is then centerless ground to exact diameter tolerance.
XCMG inspects each pin for hardness, straightness, and surface finish using CMM and Rockwell testers. Only pins meeting all criteria are approved for OEM use.
Remove the retaining clips or bolts, then press or drive out the old pin using a brass drift. Clean the bushing bores and inspect for wear – replace bushings if clearance exceeds 0.3 mm.
Lubricate the new 381600105 pin with EP grease. Insert it through the aligned bushings, making sure the grease hole faces the grease fitting. Install the retaining ring or cotter pin.
Grease the pivot until fresh grease exits around the pin ends. Cycle the joint to distribute lubricant. Check axial movement – there should be no detectable end play.
Always use a new pin when rebuilding a joint – reusing a worn pin accelerates bushing wear and leads to premature failure.
Visible scoring or galling on the pin surface, excessive radial play (more than 2 mm movement at the joint), bent pin causing misalignment, and lubricant bypass (grease exits without filling the bushing).
If the pin shows step wear (reduced diameter in the loaded area), or if the retaining groove is damaged, replace it immediately with genuine 381600105 to avoid housing damage.
Grease all pins every 250 operating hours. Apply grease until clean lubricant emerges from the joint. Inspect for loose retaining rings during each service.
Replace the 381600105 pin every 4,000‑6,000 hours for standard grading, or every 2,500 hours for heavy ripping and rocky conditions. Always replace the pin together with its matching bronze bushings.
Keep a spare pin in your parts inventory. A seized or broken pin can stop a machine completely. Proactive replacement prevents costly field repairs and downtime.
Genuine XCMG 381600105 pins come with a 12‑month warranty. Regional stocking hubs: Houston, Rotterdam, Dubai, Shanghai maintain ready inventory for fast dispatch.
Air freight delivery within 3‑7 business days worldwide. Emergency 24‑48 hour shipping available. Bulk orders (10+ pins) receive volume discounts and sea freight options.
Aftermarket pins often use mild steel without heat treatment, leading to rapid wear and bending. Genuine XCMG 381600105 uses certified 42CrMo4 with induction hardening for maximum service life. Order genuine today to keep your grader’s pivot joints tight and trouble‑free.
Don’t let a worn pin ruin expensive bronze bushings and housing bores. The 381600105 pin is a critical wear component that should be replaced on schedule. Keep spares in your service truck and replace at the first sign of scoring or play.
Upgrade your motor grader’s pivot reliability with XCMG genuine pins. Forged, hardened, and precision ground – order the 381600105 Pin now and experience smooth, precise articulation and blade control for thousands of operating hours.
