Another Cat 22 question???

Since I got the fan belt issue straightened out, I managed to do a few minute drive after it sat for almost 3 years. I discovered very quickly that the right brake grabs. A slight tap on the pedal and the Cat turns 90 degrees before I can stomp on the clutch. The pedal does not want to return unless I come to a complete stop. Then the pedal pops up just like normal. I suspected rust on the drum so I ran with the pedal lightly down but not releasing the steering clutch, hoping to wear the rust off. I pressed the brake harder and the engine tone changed (brake working?) but no difference when I try to steer normally.

Any ideas? When not moving the pedal seems to spring back up just fine, so I dont think the internal spring is bad. I am out of ideas. Grant.

maybe try adjusting the band support screws and see what you get.

Apply the brake and adjust the underside and the rear support screws, after loosening the lock nuts, turn screws in until tight against the band then back them out 1.5 turns and re-tighten the lock nuts.

Brake pedal band adjustment is 3/4 of the way to the floor plate.

This data taken from my grey Twenty Two OMI.

Cheers,

Eddie B.

I finally got time to fool with the 22 again. I did the adjustment that edb recommended and tried braking in reverse that JM recommended and nothing made it better. I am afraid it is time to pull the track and final drive, or at least enough to get to the brake band. I am thinking (guessing) that maybe the lining has come loose from the band and jams when put to use but pops back when the tractor stops and the pedal comes back up. I dont look forward to the job and it is going to have to wait until several other jobs get finished. Such is life with 90 year old tractors

should have been more explicit with my description of the band support screws--there are two per band by my parts book--the usual one underneath and one just above center on the rear of the housing.

It could be caused by oil soaked band linings too. Acetone would be a good product to use to flood the compartment with to wash said linings--as it is a little bit less volatile and so safer than petrol/gasoline.

Maybe drain the steer clutch and brake housings and see what if anything drains out, to know your next step.

Cheers,

Eddie B.

My bottom plugs are drilled with a split pin in each one. It is supposed to keep any oil from building up. I found both screws and did the tight and then 1 1/2 turn out. I may try to see if my borescope can show anything.

I did watch a Squatch video about a D2 brake and clutch area and I think it is close enough to a 22 that I have the correct idea on dis-assembly. The clutch works just fine, so I dont have to mess with that. Any suggestions are welcome. Grant.