DavidP, South Wales
Well-known Member
Hello Dale,
There are two possibilities that can cause a 'grind'. The first is that due to oil weeping past the rear crank
seal or input seal housing from the gear box has caused a film of oil to find its way onto the clutch plate
linings. This will cause a drag which will give you the grind when trying to engage. Check the cover for any oil
film.
The second possibility is that it is only adjustment. If you remove the inspection plate under the clutch housing
and using a flashlight you will see 3 equally spaced adjusting screws with locknuts around the periphery of the
clutch housing. The target clearance here is 090" which is roughly the thickness of two hand hacksaw blades
together with the teeth ground off. If the present clearance is more than this the result is that the pressure
plate may not be moved away far enough to release the PTO plate completely for engagement. Untill you have
adjusted a couple it's a bit of a tricky job. You will need two good 1/2" AF open ended spanners. Slacken the
locknut just enough to turn the screw whilst holding the locknut. Adjust to the appropriate clearance and lock
up. The actual figure is not essential but that they are all the same is. I mentioned 'target' figure earlier.
Depending on the wear in the linkage and clutch cover you may need to reduce the clearance slightly if you do not
get a clean did-engagement. The PTO should stop turning without any load with approximately one inch of travel
remaining on the clutch pedal. You may also need to adjust the position of the clutch pedal on its cross-shaft by
slackening the bolt at the front of the pedal and turning it slightly. There should be 3/8" clearance (free
travel) at the point where the pedal strikes the foot support bar. Ensure that stage one and stage two of clutch
operation do not overlap. Refit the cover.
There are two possibilities that can cause a 'grind'. The first is that due to oil weeping past the rear crank
seal or input seal housing from the gear box has caused a film of oil to find its way onto the clutch plate
linings. This will cause a drag which will give you the grind when trying to engage. Check the cover for any oil
film.
The second possibility is that it is only adjustment. If you remove the inspection plate under the clutch housing
and using a flashlight you will see 3 equally spaced adjusting screws with locknuts around the periphery of the
clutch housing. The target clearance here is 090" which is roughly the thickness of two hand hacksaw blades
together with the teeth ground off. If the present clearance is more than this the result is that the pressure
plate may not be moved away far enough to release the PTO plate completely for engagement. Untill you have
adjusted a couple it's a bit of a tricky job. You will need two good 1/2" AF open ended spanners. Slacken the
locknut just enough to turn the screw whilst holding the locknut. Adjust to the appropriate clearance and lock
up. The actual figure is not essential but that they are all the same is. I mentioned 'target' figure earlier.
Depending on the wear in the linkage and clutch cover you may need to reduce the clearance slightly if you do not
get a clean did-engagement. The PTO should stop turning without any load with approximately one inch of travel
remaining on the clutch pedal. You may also need to adjust the position of the clutch pedal on its cross-shaft by
slackening the bolt at the front of the pedal and turning it slightly. There should be 3/8" clearance (free
travel) at the point where the pedal strikes the foot support bar. Ensure that stage one and stage two of clutch
operation do not overlap. Refit the cover.
