Hyd clynder leaks off

Mayor P · Jul 17, 2010

I have a IH 2250 loader and the bucket cyl does not hold. No sign of leak at cyl. Any ideas?

pete 23 · Jul 17, 2010

I am sure your bucket cyl is configured to hold bucket up with a extending cyl rather than contracting so they are a little harder to trouble shoot. If it has two cyls you need to isolate to determine which one is leaking or if valve is leaking. You can just unhook the coupler on hose that hold bucket up to check valve. Kind of hard to explain in so many words. Did a koyker not long ago and the problem was nut cam loose holding piston on rod, never know what you will find.

Anonymous-0 · Jul 17, 2010

Most likely one or both of the internal seals on the bucket cylinders are leaking. Doesn't matter which and there will be no external leak. Replace all the seals on both and you should be good to go. You'll know as soon as you take them apart. If no fluid was leaking out the end where the shaft goes in, you usually don't have to replace those seals but all the seals on the piston inside should be replaced as a set. Don't forget there is probably an O-ring between the shaft and the piston. It is accessed when you take the nut off that holds the piston to the shaft. Put a little oil or vaseline on all the seals when putting the cylinder back together. Dave

mEl · Jul 18, 2010

If the bucket cylinder has an internal leak most times it can be pinpointed by holding the lever against rollback for a while and feeling the cylinder fittings for heat. If there is no oil bypassing the packing or rod oring the cylinder will stay cool. In systems that use two cylinders this can pick out the bad one without disassembling both. Lift cylinders can be diagnosed the same way but will not leak down any more than enough to allow the oil to transfer across the damaged packing then pressure will build on both sides of the cylinder as the path for oil to flow back to sump on both ports is closed, once the pressure equalizes on each side the cylinder it becomes a simple displacement cylinder and if pressure readings were taken they would be equal on both sides of the cylinder and driftdown will stop until the oil has a return path, simply pulling the lever into the raised position with the engine off will allow the return path the oil needs to then leak down past the packing.

Hyd clynder leaks off

Mayor P

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pete 23

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Anonymous-0

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mEl

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