Q: What is the mechanical difference between main shaft 225-4541 and pinion shaft 2254542 in an SBS140 pump?
A: The 225-4541 is the primary input drive shaft that connects directly to the engine flywheel via the flexible coupling, whereas the pinion shaft drives the secondary pump group. Both work together to run the tandem pump system.
Q: Should we replace the flexible engine coupling when installing a new main drive shaft?
A: Yes, we highly recommend replacing the rubber coupling. A worn, hardened coupling cannot absorb engine vibrations properly, which puts excessive radial stress on the new shaft and shortens pump bearing life.
Q: What quality control steps does this shaft undergo to prevent internal structural defects?
A: Every shaft undergoes ultrasonic non-destructive testing to ensure there are no internal micro-voids or structural flaws. This ensures the steel can handle high torsional stress without cracking under pressure.
Q: Can this drive shaft be used in older SBS120 pump models, or is it strictly for the SBS140?
A: This shaft is engineered specifically for the dimensions and spline configurations of the SBS140 pump found in the 325DL series. Please check your pump nameplate or consult our team to verify fitment for older pump models.
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






















