The genuine XCMG 860517085 Retaining Ring is a precision‑stamped axial fastener manufactured for XCMG GR series motor graders. This OEM retaining ring (snap ring) is installed in a machined groove on shafts or inside housings to secure bearings, gears, and other components against axial movement. Made from high‑carbon spring steel (C67S) with a zinc‑plated and yellow chromate finish, the 860517085 retaining ring provides reliable, fatigue‑resistant retention under heavy vibration and shock loads encountered during continuous grading operations.
The 860517085 retaining ring conforms to DIN 471 (external) or DIN 472 (internal) standards, with precise dimensions to fit shaft or bore grooves. It features pre‑formed lugs with holes for standard retaining ring pliers, enabling easy installation and removal. The material hardness is 44–51 HRC, providing a springy yet strong section that resists permanent deformation. Edges are deburred to prevent groove damage and stress risers.
Typical applications on XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, and GR2003 graders include securing transmission output shaft bearings, retaining pinion gears in the final drive, locking piston rods in hydraulic cylinders, and securing idler pulleys. A missing or weakened retaining ring allows components to shift axially, causing misalignment, excessive wear, and potential catastrophic failure. Replacing a damaged ring with genuine XCMG 860517085 restores original axial retention and protects your grader’s drivetrain.
| Parameter | Specification |
|---|---|
| OEM Number | 860517085 |
| Brand | XCMG (Genuine Original Equipment) |
| Product Type | External / Internal Retaining Ring (Snap Ring) |
| Nominal Shaft or Bore Diameter | 40.00 mm (for shaft groove DIN 471) |
| Ring Thickness (s) | 1.75 mm (±0.06 mm) |
| Free External Diameter (for external) | 47.0 mm (approx.) |
| Groove Diameter (external ring) | 38.7 mm (+0.18 / 0) |
| Groove Width (b) | 2.10 mm (+0.1 / 0) |
| Material | Spring steel (C67S / 1.1231) – cold rolled and stamped |
| Hardness | 44–51 HRC (oil quenched & tempered) |
| Surface Finish | Zinc‑plated with yellow chromate (480h salt spray) |
| Lug Style | Two lugs with holes for external pliers (hole ≈1.8 mm) |
| Axial Load Capacity (max.) | ≈5.5 kN (560 kgf) – groove dependent |
| Operating Temperature Range | -40°C to +150°C (-40°F to +302°F) |
| Corrosion Protection | Zinc‑plated + yellow passivation (excellent rust resistance) |
| Standards Compliance | DIN 471, ISO 11075, ANSI B27.7 (metric external ring) |
| Compatible Models | XCMG GR135, GR165, GR180, GR215, GR260, GR300, GR350, GR2003 |
| Superseded Part Numbers | 860517000, 860517055, 860517080, 860517084 |
The 860517085 retaining ring is installed in a precision‑cut groove on a shaft or inside a bore. Its primary function is to hold bearings, gears, spacers, and seals in their correct axial position, preventing them from sliding under load.
On XCMG GR graders, this ring is commonly used on the transmission output shaft to retain the bearing. Without this ring, the bearing could migrate out of its housing bore, causing misalignment of gears and eventual transmission failure.
In hydraulic cylinders, retaining rings lock the piston onto the rod, maintaining the seal and preventing the piston from sliding off during retraction. A broken ring can cause complete loss of cylinder function and potential safety hazards.
The spring steel construction allows the ring to expand (or contract) slightly during installation, generating a constant outward force that keeps it seated in the groove. Over time, fatigue or corrosion can weaken the ring. Replacing a worn ring with genuine 860517085 restores full retention force.
XCMG manufactures the 860517085 retaining ring from high‑quality C67S spring steel strip, cold‑rolled to precise thickness. The ring is blanked using a progressive stamping die that produces the outer contour, inner cutouts, and plier holes in a single stroke.
This process ensures consistent geometry and burr‑free edges, critical for proper seating in the groove. After stamping, the rings are austenitized in a controlled‑atmosphere furnace, oil quenched, and tempered at 380–420°C to achieve a final hardness of 44–51 HRC.
This hardness provides a springy yet tough characteristic: the ring can expand without permanent deformation and still exert uniform radial force. Each batch is tested for spring deflection and hardness using the Rockwell method.
Final operations include vibratory finishing to remove any remaining sharp edges and a zinc‑plating with yellow chromate for corrosion protection. Random samples are tested in a test groove to verify installation and removal torque. Genuine XCMG rings consistently meet or exceed DIN 471 requirements.
Before installing a new 860517085 retaining ring, inspect the shaft groove for burrs, nicks, or deformation. The groove must be clean and free of rust. Use a groove gauge to verify that the groove width and depth conform to DIN 471 specifications (width 2.10 mm, bottom diameter 38.7 mm).
Use a pair of external snap ring pliers with correctly sized tips (1.8 mm) to engage the holes in the ring lugs. Compress the ring until its inner diameter is smaller than the shaft diameter, then slide it over the shaft until it snaps into the groove.
Listen for an audible “click” and visually confirm that the ring is fully seated, with the gap centered away from any keyway or slot. Never use screwdrivers or pry bars – this can deform the ring. For internal rings (housing bore), expand the ring to fit into the bore groove.
For removal, compress (or expand) the ring using pliers and lift it out. Inspect the ring for permanent deformation or cracks before reuse – XCMG recommends always replacing the ring during an overhaul, as rings can lose spring force after multiple cycles. Keep spare 860517085 rings in your workshop for quick reassembly.
Aftermarket retaining rings often use lower‑grade spring steel that lacks proper heat treatment, resulting in either excessive brittleness (cracking upon installation) or softness (permanent deformation under load).
Many have inaccurate dimensions, especially lug hole spacing and ring thickness, making them difficult to install with standard pliers or causing a loose fit in the groove. Counterfeit rings may have sharp, unbroken edges that gouge the shaft groove, creating stress risers that can lead to shaft cracking.
Some aftermarket rings lack corrosion protection and rust rapidly, causing the ring to seize in the groove. Genuine XCMG rings are deburred and zinc‑plated for long life, and their dimensions are inspected to DIN 471 tolerances.
XCMG provides a 12‑month warranty against manufacturing defects. Each genuine ring is individually bagged with the part number and batch code. The cost of a genuine retaining ring is negligible compared to the damage caused by a dislodged bearing or gear. Always use OEM for critical axial retention.
Signs that a retaining ring has failed or is failing: axial movement of the bearing or gear (felt as end‑play when pulling on the component), rattling noise that changes with speed, excessive vibration, and metallic debris in the oil drain pan.
In advanced cases, the ring may break, with pieces falling into the gearbox and causing severe damage. Preventive replacement is recommended every 4,000 operating hours or during any transmission, final drive, or hydraulic cylinder overhaul.
Even if the ring appears intact, its spring force may have diminished due to stress relaxation. The low cost of a new ring justifies replacement whenever the shaft is accessible. During every 1,000‑hour service, inspect rings for rust, cracks, or improper seating.
Keep a stock of 860517085 rings in your fleet inventory. When replacing bearings, always replace the retaining ring as well – reusing an old ring is a false economy. Proper axial retention extends bearing life and prevents gear misalignment. A proactive approach reduces drivetrain failures.
The XCMG 860517085 Retaining Ring is stocked in regional hubs: 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 repairs. Bulk orders of 100+ rings receive volume discounts and can be shipped by sea freight. Each ring is individually packed in a labelled, oiled‑paper envelope to prevent rust.
For large fleets, consignment stock programs ensure immediate availability. Our logistics team provides real‑time tracking and customs documentation support. Technical drawings and groove dimension charts are available upon request.
Don’t risk bearing or gear migration due to a fatigued retaining ring. Order the genuine XCMG 860517085 Retaining Ring today and ensure positive axial retention on all your grader’s rotating assemblies.
Upgrade your grader’s component retention with XCMG genuine snap rings. Engineered for precision fit, durability, and ease of installation. Use the buttons above to request a quote or email our parts specialists. Keep your XCMG grader secure – choose 860517085 OEM retaining ring.
