B6100 Mutilated Pressure Plate

[skipmarcy]

KubotaNH,

Did you adjust the release fingers on the new pressure plate? In my I&T shop manual they talk about doing that and show some sort of measuring tool, which I can find out nothing about. They even give dimensions but I'm not sure where they are measuring from. They say to measure up from the flywheel but with the clutch plate installed I don't see how that's possible. I even asked the parts guy at my Kubota dealership about the measuring tool and he had no idea what I was talking about. Oh well........

We took the fingers off the old pressure plate and put them on the new one. One of my co-workers is a pretty good hot rod mechanic and he said the old ones didn't look that bad to him. Figured it was worth a try. The new TB will be in Monday, so it's going to be then before I can work on it.

Thanks again

When I replaced the clutch in my Mahindra with a reman. disc & plate I had to adjust the fingers. I have the shop manual and it gives a spec. for finger height and the new assembly was not in spec when installed, if I recall it was a good 3/8" off. I had to rig-up a measuring device for the job, can't remember exactly what I used now. Will definitely trash a bearing if the fingers are too high and jams it back into the case. Can also screw-up your free play adjustment range if it doesn't destroy something first. I learned many years ago too that you never pull the 2 cases together with the bolts - always get them mated reasonably well before wrenching those bolts down the last 1/4 - 1/2". You should be able to feel if the bolts are going smoothly & freely or if they get tighter before the cases are fully mated, tighten alternately from side to side, top & bottom.

 

[banjodunn]

G'day finger height on a new clutch should be right but to be safe when you bolt everything up get a ruler and measure from the clutch centre to the fingers it should be the same on all three. Yes it is possible to install thrust backwards as mentioned earlier you should have a flat machined face to mate up against the fingers also it doesn't hurt to force a bit more grease into the TB i use a good wheel bearing grease. My offer of help still stands Best of luck

 

[rdbrumfield]

Most throwout bearings have a place for the throwout fork to ride in. Some though just have a couple of springs that keep it back against the fork. When you look at the bearing, the bearing itself will ride against the fingers, with the fork side to the rear of the tractor.

When installing, it should slide freely on the input shaft collar that surrounds the input shaft. When you install, push the clutch lever a bit and watch the play, it will be easy, don't push too far as the fingers will possibly come out of where they need to be. some have springs or retainers that hold onto the throwout fingers.

Some do have adjustments. All that are two stage clutches do that I have encountered. Just lay the pressure plate on a flat surface and check the fingers for equal distance as required by the manual.

While you have it torn down, be sure to check the pilot bearing. If it is worn, replace, it will save you another teardown. Much play at all with let the clutch disc wobble a bit and cause a bit of friction that will make it hard to put in gear. I have encountered this a few times.

A trick to get out a pilot bearing is to fill the hole with grease, once it is full, take a rod, same dia as the hole, put it in the hole and hit with a hammer. The pilot bearing will come right out by the hydralic pressure caused by the filled space and the rod entering.

 

[skipmarcy]

Most throwout bearings have a place for the throwout fork to ride in. Some though just have a couple of springs that keep it back against the fork. When you look at the bearing, the bearing itself will ride against the fingers, with the fork side to the rear of the tractor.

When installing, it should slide freely on the input shaft collar that surrounds the input shaft. When you install, push the clutch lever a bit and watch the play, it will be easy, don't push too far as the fingers will possibly come out of where they need to be. some have springs or retainers that hold onto the throwout fingers.

Some do have adjustments. All that are two stage clutches do that I have encountered. Just lay the pressure plate on a flat surface and check the fingers for equal distance as required by the manual.

While you have it torn down, be sure to check the pilot bearing. If it is worn, replace, it will save you another teardown. Much play at all with let the clutch disc wobble a bit and cause a bit of friction that will make it hard to put in gear. I have encountered this a few times.

A trick to get out a pilot bearing is to fill the hole with grease, once it is full, take a rod, same dia as the hole, put it in the hole and hit with a hammer. The pilot bearing will come right out by the hydralic pressure caused by the filled space and the rod entering.

You cannot check the finger height on an unloaded pressure plate. It must be installed with disc and bolts torqued to spec. to get the proper readings. My clutch isn't a 2 stage clutch, it's a single, just like automotive and only operates the transmission. My pressure plate has seperate splines that run the pto input shaft constantly and pto engagement is electro-hydraulic.

 

[TexJer]

Most throwout bearings have a place for the throwout fork to ride in. Some though just have a couple of springs that keep it back against the fork. When you look at the bearing, the bearing itself will ride against the fingers, with the fork side to the rear of the tractor.

When installing, it should slide freely on the input shaft collar that surrounds the input shaft. When you install, push the clutch lever a bit and watch the play, it will be easy, don't push too far as the fingers will possibly come out of where they need to be. some have springs or retainers that hold onto the throwout fingers.

Some do have adjustments. All that are two stage clutches do that I have encountered. Just lay the pressure plate on a flat surface and check the fingers for equal distance as required by the manual.

While you have it torn down, be sure to check the pilot bearing. If it is worn, replace, it will save you another teardown. Much play at all with let the clutch disc wobble a bit and cause a bit of friction that will make it hard to put in gear. I have encountered this a few times.

A trick to get out a pilot bearing is to fill the hole with grease, once it is full, take a rod, same dia as the hole, put it in the hole and hit with a hammer. The pilot bearing will come right out by the hydralic pressure caused by the filled space and the rod entering.

I replaced the pilot bearing. I'm 90% sure I put the throw out bearing in backwards. There is nothing for the clutch fork to fit into, but one side of the bearing has a hardened surface which I'm sure has to ride on the pressure plate fingers. When I have time next week I'll remove the old one and start putting it back together. I'm hoping and praying that when I remove the old bearing the hardened surface will be on the backside, like I put it in wrong. Did that make sense?

banjodunn,do you measure from the clutch plate or the hub? In the manual they say to measure from the flywheel, which isn't possible.

Thanks ALL!!!

 

[banjodunn]

G'day sorry i didn't answer back earlier you can measure to the hub, however if your manual states a measurement to the flywheel get a steel ruler and lay across centre of flywheel and hold the clutch plate up to the flywheel and measure the depth from the hub to the ruler then add this to your other measurement and bingo a distance to the flywheel. It is a bit of mucking around but will give you a pretty accurate measure (if youwant to get real fussy you can mic up the ruler thickness and add that to it too if you want). Hope this helps Tex best of luck

 

[KubotainNH]

Any updates on the replacement?