5211 clutch slipping

[sbara]

My 5211 will not move. Yesterday the clutch started slipping when going uphill. I could get it to move at very low engine rpms, but now even that won't do it.

Now, there is an inch or so of completely free play before the pedal has any resistance. You can place the shift lever in any gear without pressing the clutch pedal, but the tractor doesn't move. It is as if the clutch is stopping by itself before it is engaging at the pressure plate (?). The hi/lo lever operates but I don't know if it is doing anything.

I work on airplanes, but I have NO experience with tractors. Can someone tell me where to begin to find/fix this problem?

Thanks.

 

[alan]

Sounds as though your master or slave cylinder has seized, try pushing the slave cylinder push rod back in it should go in by approx 25mm easily

 

[ixer0]

Hi,

I should think either the clutch is completely worn out or the crosshaft for the release mechanism is siezed up. It has a grease nipple either side to lubricate it. See if you can move it by hand at the slave cyl on the L/H outside of the clutch housing.

Regards

Mike

 

[sbara]

Allright, it looks like I need to look around the slave cylinder. I presume the master cylinder at the clutch pedal has a line that goes to this slave cylinder - correct? Is the rod of the slave attached to the cross shaft? So assuming this, I should disassemble the connection between the slave piston rod and cross shaft and see if either the rod or the cross shaft has seized. Should I be able to move the rod and the cross shaft by hand?

Sorry if I am being stupid about this.

Thanks again.
Steve

 

[sbara]

Today I pulled the pin that joins the slave rod to the cross shaft. I found that the joint was under a lot of pressure - the rod just exploded out of the slave cylinder when I finally got the pin out.

The clutch pedal now works smoothly and easily with no load of course. The slave piston comes out easily, so I think the hydraulic system is OK.

The lever for the cross shaft moves freely back and forth for about 1 inch (25 mm) or so and that is all. My guess is that the cross shaft should be doing more but something is frozen.

Looking for further guidance.

Thanks.
Steve (Virginia, USA)

 

[ixer0]

Hi,

There should not have been any pressure on the slave cyl pin. Maybe the master cyl is not releasing fully. Put it together, bleed it and try the clutch again. If it does it again try loosening the bleed screw to release the pressure.

Regards

Mike

 

[sbara]

I think you are right Mike. The master cylinder rod will not extend all the way. Rather than try to rebuild, I see most folks say to get a new OEM so that is what I plan to do.

After your post and with the hydraulic link disconnected, I started up in 1st gear lo, and was able to drive it no problem. So I am hoping the clutch is OK and the master will take care of it. No parts book but snooping at some web sites I am getting P/N 62452712.

Thanks.
Steve

 

[ixer0]

Hi Steve.

Yes that is the right number (alt no. 6911 2717).
I don't know which country you are in but I have these in stock.

Regards

Mike

 

[sbara]

Back after 2 weeks on the road. Mike, I am in USA and did not know you sold the parts ......... before I left I ordered the new OEM master cylinder. Thanks for your help so far, and if you sell in USA I'll call you next time I need something. Please send your contact info to me at fox_ulnfqj@fakemail.dyndns.org - this email will forward to me for one week.

Steve in Virginia

 

[sbara]

Now that I have the new master, can someone give me some advice on how to change it out? No svc manual , but I went out there and started removing bolts, but there is no obvious way to gain reasonable access to the master clutch cylinder.

There are 2 bolts that I feel from behind that should free it up but access with a wrench seems near impossible. It also seems like if I remove the 4 bolts attaching the entire pedal assembly (with master), that would also do it but same problem accessing the backing nuts.

Any hints would be appreciated.

Thanks.
Steve in Virginia

 

[ixer0]

Hi Steve,

You're making hard work of an easy job !! Remove the front panel from the cab (4 - 13mm bolts and two screws at the bottom). You can get to the cylinder easily then from the front.

Regards

Mike

 

[sbara]

With much help , especially from Mike, I got this fixed by replacing the clutch master cylinder. The old piston one would not travel to full aft. Thanks to all for the assistance.