Excavator Hydraulic Pump Couplings

The pump coupling connects the engine flywheel to the hydraulic pump. It is a wear part: the rubber element perishes, or the spline strips. The classic symptom is a clunk when you shut the engine down, followed by weak or lost hydraulics.

We list couplings by size and by spline count, because the same machine can take more than one. If you are replacing a coupling, count the splines on the old part before you order; a 13-spline coupling will not fit an 11-spline shaft.

Shop by machine: Kobelco SH60 Parts