I’ve got a Cat IT28B (serial 1HF00904) that is having issues. It worked perfectly fine yesterday. Today I started it up and the first thing I noticed is it seemed like it was struggling to stay running. It was like there was a high load on it and it was barley keeping itself from stalling. I went to move it and it couldn’t get out of its own way. When I would give it throttle to try and move it it would hardly rev up at all and barely move at all. I the best way I can describe it is it was like someone (super human strength) was holding the crank pulley and not letting the engine do anything.
I played around with it and figured out if I raise/lower the boom or tilt/tip the bucket while I tried to drive it it would work fine. As soon as I would stop using the hydraulics it would start doing the issues I described above.
Since the engine is mated directly to the hydraulic pump I’m guessing there is a blockage somewhere so the hydraulic pump is trying to pump fluid and it’s not going anywhere. When I operate the hydraulics it acts like a relief valve and the power comes back because the engine isn’t struggling to run the hydraulic pump against a blockage? Any ideas?
I played around with it and figured out if I raise/lower the boom or tilt/tip the bucket while I tried to drive it it would work fine. As soon as I would stop using the hydraulics it would start doing the issues I described above.
Since the engine is mated directly to the hydraulic pump I’m guessing there is a blockage somewhere so the hydraulic pump is trying to pump fluid and it’s not going anywhere. When I operate the hydraulics it acts like a relief valve and the power comes back because the engine isn’t struggling to run the hydraulic pump against a blockage? Any ideas?
