These pictures aren't so notorious by themselves - a couple of broken
parts from a busted Sauer Danfoss series 90 closed loop unit, maybe the
charge pump is damaged a
little bit more than usual. Clearly, something extremely foreign got
sucked into the inlet... What I found interesting, was the fact
that, whatever it was that'd cracked the charge pump, it also passed
through and jammed open BOTH of the multi-function valves at the same time.
The story behind these pictures is also extreme in its unbelievableness. First of all - the oil sample,
which lets us speculate the hydraulic oil used in the machine is
probably the same original oil from 30000 hours ago, and medium working
oil temperature is assumably close to 110 C, with the ISO particle
count estimated in the neighborhood of 24/24/24, give or take. If you
go through the trouble of checking the oil-cleanliness
component-compatibility chart, you will see that not only the oil isn't
suitable for working with dirt tolerant gear or vane pumps, it is not
suitable for working with hydraulic hoses and pipes!
Of course the machine broke down in a completely
unexpected place, and, get this, the owner, despite all the reasoning, insisted
on re-assembling the pump THE WAY IT WAS (with the split charge pump,
jammed valves and everything...) to try to move the machine from the
place it stopped so abruptly.
My only regret is I wasn't there to see it, because
it would be like watching someone who said he could walk on water try
to actually do so. Although completely aware it's impossible, you'd
still hope to witness a miracle...
And then there is a motor somewhere in the circuit... What? No need to check it?
As I was saying, folks, aren't we all hoping for a miracle?..
