CAT 476-9354 RING-THRUST

CAT 476-9354 is a split, wear-resistant thrust ring from Caterpillar for hydraulic pumps/transmissions. It is compatible with the main pump or swing motor of Cat 345, 349, and other excavators, used to limit axial displacement and withstand end-face loads. The following is raw data and does not include replacement parts information.

Core Technical Parameters (Raw Data)

Item Details
Basic Attributes
Model 476-9354, Type Split Thrust Ring (Single Slot), Material Tin Bronze (CuSn10Pb10), Single Weight 0.85 kg (1.874 lbs), Operating Temperature -30℃ to +150℃, Rated Axial Load ≥60 kN, Static Load Limit ≥150 kN, Permissible Maximum Sliding Speed ​​≤5 m/s, Lubrication Method Oil Lubrication (Compatible with Cat TO-4 Transmission Oil), Rated Life ≥10000 hours (Standard Operating Conditions)

Key Dimensions (Metric/Imperial)
Inner Diameter 127.00 mm (5.000 in), Outer Diameter 152.40 mm (6.000 in), Thickness 12.70 mm (0.500 in), Slot Width 2.0 mm, Chamfer at Both Ends 1×45°, Inner Diameter Tolerance H8, Outer Diameter Tolerance h7, Thickness Tolerance ±0.05 mm, surface roughness Ra≤0.8 μm
Matching and Performance Parameters: Fitting shoulder diameter 127.00 mm (f7 tolerance), fitting mounting groove size 152.40×12.70 mm (H7 tolerance), end face flatness ≤0.02 mm, radial clearance 0.03-0.06 mm, coefficient of friction ≤0.08 (oil lubrication), hardness HB 80-100, coefficient of thermal expansion 18×10⁻⁶/℃
Structure and Fitting Characteristics:
Structural Design: Single-slit split structure for easy installation and disassembly, suitable for axial positioning in compact spaces, no oil groove on the end face (relies on oil film self-lubrication), elastic compensation is reserved at the slit to absorb dimensional fluctuations caused by temperature changes and prevent jamming.

Material and Process: Made of CuSn10Pb10 tin bronze, possessing excellent wear resistance, friction reduction, and anti-galling properties. Precision turning and grinding ensure the end face flatness and roughness meet the sealing and load-bearing requirements under high-pressure conditions, making it suitable for harsh high-pressure, high-speed hydraulic systems.

Suitable Scenarios: Primarily used in the main hydraulic pump, swing motor, or gearbox output end of Cat 345D/E and 349D/E excavators. It plays a crucial role in axial positioning of the shaft system, limiting axial movement of components, protecting bearings and seals, and extending the service life of the transmission system.

Installation and Maintenance Points (Original Data)

Installation: Clean the mounting groove and thrust ring surface, ensuring they are free of oil, metal shavings, and burrs. The slit should face away from the non-primary load direction. Cold press-fit with a pressing force ≤3 kN, ensuring end face fit ≥95%.

After installation, check the axial clearance, controlling it to 0.10-0.20 mm, ensuring no jamming with the shaft shoulder and unobstructed oil passages.

Maintenance: Inspect the thrust ring for wear every 2000 hours. Replace it immediately if the end face wear exceeds 0.5 mm or if scratches or peeling appear.

Regularly monitor oil temperature and pressure to prevent overheating or oil shortage that could lead to thrust ring burning. It is recommended to change the hydraulic oil and filter every 5000 hours.