Hydraulic system
Problem:
operates abnormally or does not operate at all.
Possible Cause: Remedy:
1. Malfunction of pump Check pressure, or replace pump.
2. Clogs in relief valve Disassemble and clean relief valve.
3. Malfunction of relief valve Check according to service procedures.
4. Worn cylinders Repair or replace.
5. Excess load Check circuit pressure.
6. Cracking in valve Replace valve.
7. Low oil level in tank Add oil.
8. Clogged filter in circuit Clean or replace filter.
9. Flow restriction in circuit pipe Check pipes.
Now my question to you is when you activate the hydraulic motor how fast does it ramp up to? Can you distinguish any differentiation in the sound of the motor when you move the lever? (does it change AS YOU MOVE it? Or does it stay the same speed after it first ramps up?
And as was already suggested you will need to take pressure readings at the pressure port to see what pressure you are getting. Are there any error codes popping up on the display at any time when you operate the hydraulic system or truck functions?
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