I was asked recently to conduct failure analysis on a hydraulic motor that was the subject of a warranty claim. The motor had failed after only 500 hours in service, some 7,000 hours short of its expected service life.

Inspection revealed that the motor’s bearings had failed through inadequate lubrication. This was the result of the hydraulic motor being started … Read more

Sometime ago I was involved – in a supervisory capacity – in the planned change out of components on a hydraulic machine. The design of the machine’s hydraulic power unit was the all-too-common, cheap and nasty, everything mounted on the tank lid variety. You know the ones – electric motor mounted vertically, with pump submerged in the tank. They’re cheap … Read more

One of our members wrote me with this question:

“I was subcontracted to remove a 30 GPM, 4000 PSI rated hydraulic pump from one plastic injection press and install it into a similar hydraulic system.

The hydraulic pump and prime mover are both beside and below the bottom of the reservoir; a “flooded inlet” design. AND, except for the ball … Read more