My previous blog-post featured this picture of a cracked, piston-pump housing. One of my FaceBook Friends made the comment that for this to happen, the pump’s rotating group would have to have failed and come apart in a spectacular way. Not so. And based on my long experience in the hydraulics repair biz, this being the cause of a cracked housing is a rare occurrence indeed.
Further, a cracked pump or motor housing due to a restricted (or blocked) case-drain line is far more common than you might think. Of course, if you forget to connect the drain line in the first place, you effectively turn the pump or motor housing into a pressure vessel–something it’s not intended to be.… continue reading »
A checklist is a simple ‘tool’ that serves a very important function: to INFORM and REMIND. In so doing, mistakes or omissions resulting from ignorance and/or memory lapse — and which can easily result in the rapid destruction of a hydraulic component — can be prevented.
For example, here’s an instructive story sent to me by Hydraulics Pro Club member Rich Catalo:
“We deal with a very large dock and dredge company. They have many pieces of hydraulic equipment from different manufacturers.
The last call I received was over a tech that removed a hydraulic cylinder that was in need of a reseal.… continue reading »
Although far from new, global warming is a real and present issue right now. And whether you believe the science or not, we’re currently witnessing evidence of what climate-change scientists have been warning us about for some time: increasing incidence of extreme weather events.
This apparent trend towards wider extremes in temperature has implications for anyone who designs, operates or maintains hydraulic equipment: the real possibility of machines having to operate at much lower cold-start temperatures and/or much higher maximum ambient temperatures, than the long-run average.
In other words, more hydraulic machines may find themselves operating in temperature extremes for which they are not equipped.… continue reading »