2006 tool cat. tilt slowly drifts down with engine off or running. cylinder seals replaced twice shows no damage. Is this a spool problem or could it be relief valve or spool lock valve. anyone replaced either the spool or valves and had success?? thanks coqui
scootr
Super Member
- Joined
- Aug 9, 2022
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- Temecula California
- Tractor
- Kubota MX5200 HST, 773 Bobcat, Cat forklift
Mine does the same thing, annoying when mowing. I blame it on the tilt cylinder which shows a small leak.
oldnslo
Super Member
Lower the loader so there is no weight on the tilt cylinder. Disconnect the rod end hose for tilt from the valve and cap it off so there are no external leaks. Raise the loader so their is now weight trying to dump the bucket - extend the cylinders. If bucket tilts the cylinders are leaking internally. If bucket does not move then leaking thru the valve.
oldnslo
Super Member
Does that valve have work port relief valves if yes then possible the work port relief is leaking. Same for any load holding valve.
Spool could possibly not be centering properly which could allow some extra leakage from work port to tank.
Have you measured the cylinder movement vs time and then calculated the leakage? Reason for asking is all spool valves leak…question becomes what is normal and acceptable.
Spool could possibly not be centering properly which could allow some extra leakage from work port to tank.
Have you measured the cylinder movement vs time and then calculated the leakage? Reason for asking is all spool valves leak…question becomes what is normal and acceptable.
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