Ford 5000 w/turbo, ran great, fixed throttle shaft leak years ago, pump head to body leak fixed by changing O-ring.
Removed the pump, pulled the pump head out and replaced the big o-ring, re-installed the pump head, no issues, pulled the drive hub off and replaced the front seal, installed the pump back on the tractor.
Bled the pump and lines, engine fired right up but went to full throttle, only way to reduce RPM is to pull the shut off.
Figured I had something hosed up on the governor linkage I pulled the cap back off and checked it, everything OK, started it again, same issue, did that three times, even took a brand new Mefin pump I've had on the shelf for this tractor for years, took the top off to check it to make sure I had everything back as it should be, no joy.
When it starts it pops right off and if I pull the shut off out part way I can control the rpm but the throttle does not respond at all unless the shut off is all the way on, then it goes wide open.
The only thing I can think of is something in the pump head having a problem, it fit back in easily when I put it back in, really has me puzzled.
I've even taken it outside and let it run for five minutes with the shut off part way pulled, runs fine until the shut off is opened, any Ideas would be appreciated, I really don't want to have to replace the CAV with the new Mefin pump if I don't have to, the tractor came from the dealer with an M&W turbo and I have no idea if the CAV pump had to be turned up to accommodate the turbo.
Thanks
Removed the pump, pulled the pump head out and replaced the big o-ring, re-installed the pump head, no issues, pulled the drive hub off and replaced the front seal, installed the pump back on the tractor.
Bled the pump and lines, engine fired right up but went to full throttle, only way to reduce RPM is to pull the shut off.
Figured I had something hosed up on the governor linkage I pulled the cap back off and checked it, everything OK, started it again, same issue, did that three times, even took a brand new Mefin pump I've had on the shelf for this tractor for years, took the top off to check it to make sure I had everything back as it should be, no joy.
When it starts it pops right off and if I pull the shut off out part way I can control the rpm but the throttle does not respond at all unless the shut off is all the way on, then it goes wide open.
The only thing I can think of is something in the pump head having a problem, it fit back in easily when I put it back in, really has me puzzled.
I've even taken it outside and let it run for five minutes with the shut off part way pulled, runs fine until the shut off is opened, any Ideas would be appreciated, I really don't want to have to replace the CAV with the new Mefin pump if I don't have to, the tractor came from the dealer with an M&W turbo and I have no idea if the CAV pump had to be turned up to accommodate the turbo.
Thanks