Loader won't stay put

[musselmark]

I have a Tn75 and the LC32 loader bucket creeps down fairly fast ( approx 1' in 20 minutes ) I assume this must be oil bypassing the piston seal going from one side of cylinder to the other. I asked dealer about a seal kit for these cylinders and the price was ridiculous, several hundreds of dollars. Has anyone had luck finding aftermarket seals for these loaders.

 

[Tx Jim]

When you state loader bucket creeps down do you mean boom lowers or bucket curls forward? If boom lowers then hyd control valve is at fault not cylinder packing if no external oil leaks are visible. Any good hyd repair business should have correct cyl. seals.

 

[musselmark]

Bucket curling down...I tried my local hydraulic shop but something about new Holland using proprietary metric European seals makes them a dealer only seal. Just curious if anyone found some other source.

 

[PILOON]

Control valves don't rely on seals but rather a very tight tolerance between the piston and valve body and generally not overhauled or repaired.

The choice is replace or live with it.
Another solution is a 'check valve' in the circuit, but that's also $$.

Some valves incorporate a pressure relief function which might be the culprit, this can be serviced if it is the cause.

LOL, my bucket also suffers the slow leakdown symptom but I have learned to live with it.
Actually it rarely is a problem as I rarely need it raised for a prolonged period, mostly I'm either digging or dumping but generally always in motion.
When I travel, sure it droops, but I simply tap the 'up' every so often to correct.

 

[Dave M7040]

If you carefully follow through the steps in this diagnostic procedure, you will identify the cause of your leak down. Just changing or adding parts hoping for success is like rolling the Dice. Rarely successful and expensive.

Dave M7040

 

[hawkeye08]

When doing this on the tractor, do you do this on both sides at the same time? Do you disconnect one end of cylinder so it is not trying to lift loader with the other side if you only do one side at a time? Just wanting to do this safely (my FEL slowly lowers as well as bucket drops, have not measured it, but over a few days will drop all the way down (or until it finds something to crush).

 

[Dave M7040]

I think it most expeditious to do both at the same time or alternatively, remove the untested cylinders so they have no load on them.

Dave M7040