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John (UK)
10-19-2006 08:41:48
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Re: TEA control valve again in reply to Jim W, 10-19-2006 07:10:14
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All Pumps interchange, doesn't matter if they have gaskets or "O" rings. You can fit the later type Pump in the older tractor of you just file the wings/ears on the PTO drive slightly. It isn't very much to remove, just the difference between the thickness of the gaskets and the "O" rings. The problem you have is related to the Control Fork, it was changed at the same time the axle was strengthened or just after (325,000 on),they strengthened the Ram Cylinder too at the same time, just what the difference is I can't remember but it is the shape and as you have already found out, it does not move the Control Valve back far enough to allow drop. I would think that if you fit the old Control Fork in the new top it should work, but I have never tried it, but as far as I can see that is all it will be. Those square nuts on the Top Cover, one is for tapping off Hydraulic Power as before but the left one now houses the Relief Valve instead of it being on the Pump, if you still have the Relief Valve on the Pump it is ok, just leave it there or you will need a special short check valve to fit in its place. Whichever Relief Valve is set to the lowest pressure will open first, the new top one is adjustable with shims. Having the two valves is useful if you have a loader fitted as it gives twice the flow capacity through the Relief Valves so it wont be able to build up a back pressure. The Control Valves are all more or less the same, the difference is if they have provision to fit the different types of Oscillator. Filing the "ears" on the PTO gearbox is the approved method of fitting the new Pump in the old housing. You shouldn't have let it start to drive you nuts Jim, you should have emailed me.
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