- This topic has 9 replies, 5 voices, and was last updated 12 years ago by
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Without seeing actual pictures, I'm speculating that the pump you are referring to actually belongs to the backhoe, and is operated by the tractor's PTO. The hoses are not normally removed from these pumps and the pumps are normally removed along with the backhoe and stay with it unless you have one of the heavier built Prince pumps that merely slide onto the lower splined PTO shaft.
Have you checked the hydraulic oil level? There is a remote possibility that the pressure relief valve is stuck open by debris and just passing oil.
How do you know the pump is working?
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These tractors have the setup to permit a second hydraulic pump to be mounted above the PTO shaft where it is run directly off the engine. There is a square plate just above the PTO that is removed to expose a drive tang where you mount a regular CBN- type pump just like the one on the engine, and it is driven by a shaft from the engine that runs straight through the PTO housing. The only difference is that this pump must be re-configured to turn the opposite direction from the one on the engine. This pump is left connected to the tractor all the time and only the hoses are removed from it to disconnect the 'hoe from the tractor.
It is possible that the OP has this type of setup instead of a PTO pump.
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Ok.
The tractor has two rear PTO’s.
1) Upper, full time, runs at engine speed, cannot be disengaged, flush tang drive. A CBN pump mates to this (no other pump will).
2) Lower, part time, two speeds (540/720 r/m) plus neutral, 1-3/8″ dia. six spline shaft. A Prince pump slips over this shaft.
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