The genuine XCMG 381601188 PY180G.10.1-4Ⅱ Copper Bushing (Phosphor Bronze) is a high‑precision, centrifugally cast wear sleeve designed for motor grader circle drive housings, steering knuckle pivots, and blade lift linkage bearings. This OEM 381601188 bushing is manufactured from SAE 660 phosphor bronze (CuSn8P), providing excellent conformability, embeddability, and corrosion resistance. The bushing features a precision‑machined inner diameter (ID) with spiral oil grooves and a chamfered lead‑in for easy pin installation. Engineered for XCMG GR135, GR165, GR180, GR215, GR260, GR300, and GR350 motor graders, the 381601188 copper bushing withstands high oscillating loads, shock, and contamination, making it ideal for low‑speed, heavy‑duty pivot applications.
This phosphor bronze bushing is installed in the upper and lower circle supports, articulation joint eyes, and blade cylinder mounts. A worn or seized bushing causes play, noise, and accelerated wear of the mating pin and housing bore. Replacing a damaged bushing with genuine XCMG 381601188 restores original clearances, eliminates knocking, and extends the service life of your grader’s pivot points.
The bushing’s graphite‑free bronze alloy provides inherent lubricity and excellent anti‑galling properties. XCMG 381601188 ensures consistent performance even under marginal lubrication conditions, reducing maintenance frequency and downtime.
| Parameter | Specification |
|---|---|
| OEM Number | 381601188 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | Phosphor Bronze Bushing / Copper Sleeve (PY180G.10.1-4Ⅱ) |
| Material | Phosphor bronze (CuSn8P / SAE 660), centrifugally cast |
| Outer Diameter (OD) | 65.00 mm ±0.03 mm (finish‑turned) |
| Inner Diameter (ID – Finished) | 55.00 mm +0.05 / -0.00 mm (reamed) |
| Wall Thickness | 5.0 mm (nominal) |
| Overall Length | 70.0 mm ±0.2 mm |
| Hardness (Brinell) | 80‑110 HB |
| Tensile Strength (min) | 240 MPa (35,000 psi) |
| Yield Strength (0.2%) | 130 MPa |
| Lubrication Grooves | Spiral internal, 2 mm width × 0.5 mm depth, cross‑hatch pattern |
| Max Dynamic Load (PV) | 1.75 N/mm² · m/s (with lubrication) |
| Operating Temperature Range | -40°C to +180°C (continuous) / +220°C peak |
| Coefficient of Friction (Lubricated) | 0.08 – 0.12 (with EP grease) |
| Surface Finish (ID) | Ra ≤ 0.8 µm (reamed or bored) |
| Corrosion Protection | None (bronze is inherently corrosion‑resistant; store dry) |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350 motor graders |
| Superseded Part Numbers | 381601165, 381601172, 381601180 |
The 381601188 phosphor bronze bushing is the primary wear element in circle drive supports, articulation joints, and blade lift eyes. It provides a low‑friction, replaceable bearing surface that absorbs oscillating loads and radial forces.
Without a properly functioning bushing, the pin directly contacts the housing bore, causing rapid, expensive damage. The bronze bushing acts as a sacrificial layer, preserving the parent structure.
In circle drives, worn bushings allow vertical play, causing blade bounce and uneven grading. Replacing with genuine 381601188 restores stable blade control and eliminates knocking noises.
Each 381601188 bushing is centrifugally cast, creating a dense, fine‑grained structure with no porosity. This process aligns the copper‑tin intermetallic phases for superior wear resistance compared to sand‑cast alternatives.
After rough turning, the bushing is precision bored and reamed to final ID tolerance. Spiral oil grooves are cut using a CNC lathe, then deburred. The lead‑in chamfer eases pin insertion during assembly.
XCMG inspects every bushing for dimensional accuracy using air gauges. A sample from each batch is tested for hardness and tensile strength to ensure material conformance to SAE 660.
Remove the pin and clean the housing bore thoroughly. Use a press or bushing puller to extract the old bushing. Inspect the bore for scoring or out‑of‑round – repair if necessary.
Lightly oil the outside of the new 381601188 bushing. Press it into the housing using a mandrel that contacts only the bushing’s end face. Ensure the oil groove aligns with the grease fitting hole.
After installation, check the inside diameter with a telescoping gauge. The pin should slide with light hand pressure. Grease the assembly thoroughly before operation.
Excessive play in the pivot, unusual knocking or squeaking, difficulty greasing (grease bypasses the pin), and visible scoring or galling on the pin surface.
Also, if the bushing has spun in the housing or shows deep wear grooves, replace immediately with genuine 381601188. Always replace the pin at the same time to restore original clearance.
XCMG recommends greasing bronze‑bushed pivots every 250 operating hours. Apply 10‑15 pumps of lithium EP grease. Replace bushings every 4,000‑6,000 hours for standard grading use.
In dusty or muddy conditions, shorten replacement to 2,500‑3,000 hours. Always measure pin‑to‑bushing clearance during annual overhauls – replace if exceeding 0.3 mm.
Using genuine XCMG 381601188 ensures correct alloy composition, oil groove geometry, and surface finish. Aftermarket bushings often use lower‑grade brass that wears rapidly and lacks proper groove design.
Genuine XCMG 381601188 bushing carry a 12‑month warranty. Regional warehouses in Houston, Rotterdam, Dubai, and Shanghai maintain deep stock of this common wear part.
Air freight delivery within 3‑7 business days worldwide. Emergency 24‑48 hour shipping available. Bulk orders (25+ bushings) receive volume discounts and sea freight options.
Aftermarket bushings often use low‑quality aluminum bronze or plain brass, which lacks the fatigue strength of SAE 660 phosphor bronze. Genuine XCMG 381601188 provides proven wear life and dimensional consistency. Order genuine today and eliminate pivot point play and noise.
Keep spare 381601188 bushings in your parts inventory. A worn bushing ruins expensive pins and can damage the housing bore, requiring expensive reworking. Proactive replacement saves thousands in repairs and downtime.
Upgrade your motor grader’s pivot reliability with XCMG genuine phosphor bronze bushings. Centrifugally cast, precision machined, and oil‑grooved – order the 381601188 Copper Bushing now and experience smooth, wear‑resistant operation for thousands of hours in the toughest grading conditions.
