Worked on Hartle HBC750.
Just FYI who doesn’t know: the adjustment on controls is not pressure relief but flow regulator.
That one had blown counterbalance O-ring. Those metric but odd “half” size: 27.5x2.5 mm
and 25.5x2.5 mm
Motors case drain port adapter is: metric port/DKO.
I suggest ordering O-rings and have them in spares because I think they get blown if someone screws up and forgets to open return shut off on excavator.
Just FYI who doesn’t know: the adjustment on controls is not pressure relief but flow regulator.
That one had blown counterbalance O-ring. Those metric but odd “half” size: 27.5x2.5 mm
and 25.5x2.5 mm
Motors case drain port adapter is: metric port/DKO.
I suggest ordering O-rings and have them in spares because I think they get blown if someone screws up and forgets to open return shut off on excavator.
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