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Massey Harris & Massey Ferguson Tractors Discussion Board

Re: 165 clutch won't disengage PTO


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Posted by DavidP, South Wales on August 11, 2010 at 03:30:06 from (92.26.74.93):

In Reply to: 165 clutch won't disengage PTO posted by dozerboy450 on August 10, 2010 at 19:29:13:

third party image

Hi, Your PTO and shift problems are tied together. You do seem to be able to stop and start the the PTO...just, so that almost rules out the possibility of a broken clutch plate lining. The most likely answer is that there is too much clearance at the heads of the 3 PTO adjuster screws around the outside of the clutch unit. You will need to remove the inspection plate under the clutch housing. If you have a front end loader fitted the beam will need to be reomoved to gain access to the clutch. When you have this removed and using a flashlight inspect the clutch unit and look for signs of oil. If all is clear....good. Locate the 3 adjusters equally spaced between the coil springs. The target adjustment is 090". If you do not have a feeler gauge to make this two hand hacksaw blades with the teeth ground off will suffice. The thickness does not need to be exact but each one MUST be adjusted the same. Using 2 good fitting 1/2"AF open ended spanners adjust the screws until your gauge is a neat fit. The first one will be difficult....but it does get easier.
Check the PTO operation. An unladen PTO should stop with a minimum of one inch of pedal travel remaining. If necessary adjust the clamp at the clutch pedal. Two types are fitted with the most common being the rear pivot pedal type. Adjust so that there is approx 3/8" gap at the point where the clutch arm strikes the casing when the pedal is pressed in the free travel. Adjustment is not exact and it may be necessary to reduce your gauge thickness very slightly if the PTO does not engage satisfactorily. Every tractor is different.
If there is oil present that may cause a drag but I think your problem is adjustment. This out of adjustment will prevent the hydraulic pump stopping when in MP 'High' and make shifting difficult.
DavidP


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