Clutch on 5011 wont disengage

[ian_flint]

I've had my Zetor for several years now and it's been mostly plain sailing, and have been slowly learning about the mechanics of this beast.
2 years ago the short rod that connects the cluch pedal to the rest of the cluch levers sheared off so I repaired it. It broke again recently, after making a new one I found 3 grease nipples under the inspection plate near the clutch. I duly greased them as I haven't ever done them (2 on the steering and 1 on the rod that disappears into the cluch housing.

On starting the tractor I can no longer disengege the cluch. The pressure on the pedal seams normal and the 3PL works at about the same place in the cluch travel as they always have so I think I've got the tension on the cluch rods right.

I opened another inspection point into the cluch housing and there seams to be grease coming out of the shaft that I greased. This is to the rear of the housing. The cluch plates are to the front aren't they?

Has the grease got somewhere it shouldn't have or has something else happened when the pin sheared?
Any help would be great. The workshop manual doesn't help me out at all.

 

[Renze]

does a 5011 have a mechanical clutch ? i didnt think so... it should be hydraulic like the later models.

probably your master cylinder is dodgy, or you're running out of oil.. Do the brakes still function normally ? First the clutch runs dry, then the brakes because the opening is higher in the canister.

 

[alan]

The Zetor '0' series (5011 to 7045) used mechanical rod linkage.
Hydraulic clutch came for the '2' series (5245 to 7745).
Most likely cause of the clutch not disengageing is that one of the buttresses have burst, they can be changed through the inspection hole without splitting the tractor.

 

[Renze]

Alzet, i didnt know that the 0 series still had mechanical linkage... They were the first UR1 with the new free standing rubber mounted cabs, so i assumed they were basically the same... We only had 2011, 3011, 4712, 5718, 6718, 5245 and a C-385 A so thats all i can speak of.

 

[ian_flint]

Thanks for the input so far. As far as I can tell the clutch is mechanical, not Hydrolic. I just got back out to it, and when the clutch is depressed all seems to be working OK but a lever in the housing has a split in it.

Would the "Buttress" be the lever (x2) that connect to the clutch plates (front end of housing) and are pushed by the 'piston' as the clutch pedal is depressed (back end of housing). This is what is split.

Are these standard items or do I try to find a Zetor dealer down in Australia???

(Actually, some of the bolts and fixtures around this area are pretty shiney and new, I wonder if it has had a new clutch along the way?)