Mustang 940E hydraulic problem - lift pedal reversed!

[Paul1965]

Hello I have a Mustang 940E skid steer loader. The hydraulics have been playing up over the past months but up until last weekend it has been useable. Normally, to lift the bucket I would have pressed down on the pedal with my heel. To lower the bucket I would have pressed down with my toe. Now they have reversed. But there is very littlw power in the lift action, cannot pick up any weight at all. I have read about checking the position of the auxilliary lever and it appears to be in neutral. With everything switched off all of the spools are in alignment. However, I cannot get the auxilliary lever to move into any other position. I am thinking maybe I have a 'hydraulic lock' or trapped pressure? It appeared to finally give up when I raised the bucket to its maximum height and when it came down the hydraulics were reversed. This could be a coincidence... I then tried to raise the bucket all the way up again and it seemed like the rams over-extended (The rods were at a strange angle to the cylinder and there was some fluid leakage). I had to lever the cylinders into alignment to get them to lower again. Can anyone offer any suggestions as to what the problem could be please? Thankyou Regards, Paul

 

[OldMachinist]

Sounds like you need to take the cylinders off and check the the pistons are tight on the rods. If a piston gets loose oil can bypass and cause weird stuff.