Hello, first post and first tractor so please be gentle...
I've just acquired a 1970 Ford 4000 3-cylinder diesel tractor (independent PTO). Got it mega cheap and at first thought I had a bargain, especially once we got it running (was told it hadn't run for a year and can believe it). It came with a loader which was stuck in the ground when we got it off the trailer. By moving the valves on the block (obviously aftermarket) the loader did move slightly until one of the pipes exploded, covering me in hydraulic fluid
Anyway, subsequent investigation shows that in addition to the gear driven pump on the rear case, there is an engine driven pump on the rear left of the engine - presumably because it has a higher rating. The feed for this comes via the drain off plug (relief valve?) at the rear of the tractor and the return (pressure line) went to the 3 lever valve block. This, in turn, had a return line that is tapped into the fluid filler point on the back axle, so they are using the same fluid.
Because I needed the tractor moved and couldn't get any hoses locally, I pulled the pins from the loader and removed it (breaking a window in the process ). I'm not too interested in using a loader but want the rear hydraulics to work.
Now, as it stands, the rear arms don't move at all - I'm sure they did a little bit before I disconnected the loader valve block (so the pump just circulates fluid?). I've taken the lift cover off and removed the flow metering valve, which was a fun job. The pipe with the banjo bolt on the end was loose and that's tightened up again. The dump valve doesn't appear to be stuck but with the large hex screw and spring removed there is a slight flow of oil when the engine runs. The levels are fine (if anything a bit high).
The PTO shaft runs continuously which isn't ideal. I've carefully tried stopping it with a piece of wood (with the lever in the disconnect position) but it's not free-wheeling, it's being driven.
I've had the engine running for a few minutes at high rpm to see if the pressure is just a bit slow to build, but no joy.
So, either my original pump is kaput or the loader pump is causing an issue.
HELP!
I've just acquired a 1970 Ford 4000 3-cylinder diesel tractor (independent PTO). Got it mega cheap and at first thought I had a bargain, especially once we got it running (was told it hadn't run for a year and can believe it). It came with a loader which was stuck in the ground when we got it off the trailer. By moving the valves on the block (obviously aftermarket) the loader did move slightly until one of the pipes exploded, covering me in hydraulic fluid
Anyway, subsequent investigation shows that in addition to the gear driven pump on the rear case, there is an engine driven pump on the rear left of the engine - presumably because it has a higher rating. The feed for this comes via the drain off plug (relief valve?) at the rear of the tractor and the return (pressure line) went to the 3 lever valve block. This, in turn, had a return line that is tapped into the fluid filler point on the back axle, so they are using the same fluid.
Because I needed the tractor moved and couldn't get any hoses locally, I pulled the pins from the loader and removed it (breaking a window in the process ). I'm not too interested in using a loader but want the rear hydraulics to work.
Now, as it stands, the rear arms don't move at all - I'm sure they did a little bit before I disconnected the loader valve block (so the pump just circulates fluid?). I've taken the lift cover off and removed the flow metering valve, which was a fun job. The pipe with the banjo bolt on the end was loose and that's tightened up again. The dump valve doesn't appear to be stuck but with the large hex screw and spring removed there is a slight flow of oil when the engine runs. The levels are fine (if anything a bit high).
The PTO shaft runs continuously which isn't ideal. I've carefully tried stopping it with a piece of wood (with the lever in the disconnect position) but it's not free-wheeling, it's being driven.
I've had the engine running for a few minutes at high rpm to see if the pressure is just a bit slow to build, but no joy.
So, either my original pump is kaput or the loader pump is causing an issue.
HELP!