A hydraulic pump may fail due to wear, surface degradation, leakage, insufficient fluid delivery, noisy operation, drive failure, and pump breakdown.

The wear may be caused by fluid contamination, viscous fluid, misalignment, loose bolts, and under-lubrication.

The surface degradation may be due to cavitation, higher rate of oxidation, and misalignment.

The probable causes of leakages are lower fluid viscosity, hardened seal, scratched shaft, and excess pressure.

The pump may produce less delivery due to wear, air pockets at suction, more vacuum at suction, and a low PRV setting.

The pump may produce a lot of noise due to cavitation, misalignments, gear damage, wear, high drive speed, and loose bolts.

The drive failure can be attributed to misalignments, loss of operating speed, and improper tensioning of V-belts.

By

Joji Parambath

Resource Person/Author