A: Severe high-frequency vibrations under load, unusual clunking noises during engine startup, and black rubber dust accumulation inside the pump housing inspection plate indicate advanced coupling degradation.
A: Perfect parallel and angular alignment between the engine flywheel face and the hydraulic pump shaft input must be verified using a dial indicator to prevent uneven rubber wear.
A: This coupling matches C6.4 engine setups perfectly. Cross-verify your part number with 279-7871, 7Y-0463, 305-4951, 305-4952, or 305-4950 for 320D series units.
A: Yes. The specialized composite rubber formula is engineered to withstand oil mist exposure and continuous operating temperatures up to 100 degrees Celsius without hardening or tearing.
A: We maintain large production runs to ensure competitive pricing and immediate stock availability, allowing you to fulfill urgent excavator repair orders without delay.
A: We provide original, OEM, and high-quality aftermarket versions with stable supply capability.
Q:Why Choose RITO?
A:Listed Factory
Stable&Reliable Quality
OEM Factory for Chinese Top Excavator Brands
Supplier to Fortune 500 Companie





















