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Discussion Forum

A-C C hyd. pump

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01-23-2003 21:14:39

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My hyd.pump will not lift more than 150 lbs. orignal cylinder with new rod & seal works smoothly with no binds or leaks. refilled with jd hytrans oil.oil is still a little milky but not bad. had been sitting for 2 years before i got it & hyd. system not used for many years prior. once raised & left in hold pos. can be pushed down with about 200 lbs. what is the best place to start looking at & who has rebuild parts if needed.

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01-24-2003 04:48:42

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 Re: A-C C hyd. pump in reply to barry, 01-23-2003 21:14:39  
On the B-C pump the hold valve and relief valve are one and the same and probably where your problem is. Before tearing it apart try this. With the engine at high idle run the cylinder out against the stop and hold the lever in the lift postion for 4-5 seconds. You should hear the pump rattle. Let it by-pass some oil then let the implement down or push the cylinder in by hand. do this several times and you might get it to work as it flushes dirt from the valve. If not get a manual BEFORE you tear the pump apart. It is not real complicated but has proceedures that must be followed to avoid damage from incorrect assembly-disassembly. Parts are avialible from AGCO in kit form only, meaning all seals, balls, springs and valves. price was around $150 last I checked. Luckily it is not very often that any any parts are needed, just need cleaned of dirt and debri.

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