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 for the same company.

The hydraulic pump and prime mover are both beside and below (approx 12″) the bottom of the reservoir; a “flooded inlet” … Read more

I was recently engaged by a client to conduct failure analysis on a large (and expensive) hydraulic cylinder off an excavator. This hydraulic cylinder had been changed-out due to leaking rod seals after achieving only half of its expected service life.

Inspection revealed that apart from the rod seals, which had failed as a result of ‘dieseling’, the other parts … Read more

In most hydraulic applications there are essentially two ways to get the required power output: high flow at (relatively) low pressure; and low flow at high pressure. This is because power is a product of flow and pressure; increase pressure and you can reduce flow proportionately but still get the same power output. For example, 100 liters/min at 200 bar … Read more