CAT 544-4871 RING-WEAR-GD

CAT 544-4871 GD is a Caterpillar genuine hydraulic cylinder piston split-type wear ring (wear-resistant support ring). The following is purely precise information (no additional description):

Core Parameters and Information

Item Details
Part Model: CAT 544-4871 (5444871) GD Series Wear Ring

Part Type: Split-type piston wear ring, used for guide support, preventing metal-to-metal contact between the piston and cylinder, and buffering radial loads

Material: Filled with PTFE (PTFE + 25% bronze powder), hardness Shore D 78-82, coefficient of friction ≤0.15

Key Dimensions: Inner diameter 125.00mm (H9 tolerance), outer diameter 150.00mm (f8 tolerance), width 12.00mm, number of segments 2, opening gap 0.8-1.2mm

Structural Features: Symmetrical halves, with positioning grooves, adapts to piston grooves, self-lubricating, oil-free groove

Matching Transition fit with piston grooves, cylinder clearance 0.05-0.08mm, working pressure ≤35MPa
Working temperature -40℃ to +180℃, compatible with mineral oil, synthetic ester, and phosphate ester hydraulic oils
Weight 0.16kg
Compatible models and assemblies:
Excavators: CAT 336D2, 349D2 (boom/stick/bucket hydraulic cylinder pistons)
Loaders: CAT 980M, 982M (lifting/tilting hydraulic cylinder pistons)
Bulldozers: CAT D8T, D9T (bulldozer blade hydraulic cylinder pistons)
Matching parts: 544-4871 wear ring, 544-4872 piston seal, 544-4873 guide band, 9X-3456 retaining ring
Installation and fitting points: Clean the piston grooves and cylinder inner wall, free of burrs and oil stains, surface roughness Ra≤0.4μm.

The two halves of the ring are assembled together, with the openings staggered by 180°. The rear end faces of the embedded grooves are flush and without protrusion.

Radial clearance is 0.05-0.08mm, and axial runout is ≤0.03mm. Avoid interference fits that could cause ring deformation.

Apply hydraulic oil before assembly. Do not strike with sharp tools to prevent damage to the PTFE layer.