1985 Cat 931B wet brake adjustment

I've read other places that the clutch stack could be too thick to release. I have no idea if or when they have been replaced. I feel like I would be better off just using it till something really breaks. Just a farm machine, clearing some land for pasture. Seems all the slipping from brake use would eventually get it within limits

The steering clutches could be worn out. The problem if you wait until something really breaks or just stops working is it will usually cost a lot more to fix. If the brakes wear through the drums, new drums aren't cheap. It's much better to fully diagnose what the problem is in order to save on repair costs. You can check the stop bolts but I think it's a bigger problem. Hope I'm wrong.

Nige would you mind sending me the steering clutch removal and rebuild procedure? Thanks

Nige would you mind sending me the steering clutch removal and rebuild procedure? Thanks

Pulling the clutches out isn't too big of a deal but having a helper makes it a lot easier. The book says to loosen the fuel and hydraulic tanks to tilt them out slightly but I found it doesn't make much difference because they hit the ROPS right away. I hung a come-a-long from the ROPS and twisted/tilted the clutch assembly sideways to get them in and out. I used a 1" nylon lifting sling around the clutch assembly. I think it was 3 or 4 feet long. You need to remove the bung like plug above the sprockets to get at the outside bolts holding the clutches to the final drives. I had the machine lifted up and used a prybar to turn the tracks to take the bolts out one at a time. There's 4 inner bolts that you have to have at the top to remove. You have to make it so the last inner bolt is at the top when you take the last outer bolt out. The clutches require a press and special tooling to take them apart and put back together. From what I've read/heard if you press too hard you can break something. Best to have done by a qualified shop. It was about $3500cad. a side when I did dry clutches several years ago. I also had a brake shop put new material on the brake bands. The hubs were good. Kind of expensive but it's like a new machine now. Very easy to steer.

look at this thread might help you Cat 931 Steering Problem​ Thread starter sergioannis Start date Apr 4, 2025

Here it is. https://www.heavyequipmentforums.com/threads/cat-931-steering-problem.117448/

Thanks guys. I checked the thread out. Seemed like @sergioannis , if I read the thread right, his yoke wasn't moving. I just put 3500 in this thing for new chains and sprockets, so I can't let a shop do the clutches right now. I just wonder if the guy I bought it from had the clutches done and maybe the stack is too thick. Seems like it has to be too thick, throwout bearings worn, or the stop bolt/piston linkage adjustment. I can adjust to get more yoke movement easily, but that probably won't fix it. And remember, both sides are the same.

Two things that could be a problem a lot of play on the balls on bottom of yoke, throw out bearing bad or nut that holds the bearing being loose

Good thinking. The clutch case covers are back on now, but I left the battery tray out, so I can have the covers back off in an hour. Don't know when I will get a chance to look at it again but if you guys think of anything else let me know, I appreciate the help.

I put new bushings in for the balls on the yoke but don't think I needed to. I had to cut a slot with a torch and use a chisel to get them out. Didn't have any dry ice or nitrogen so had to pound the crap out of them with a brass hammer to get them in. The shop that did the clutches suggested I use dry graphite on the balls instead of grease because grease would attract dirt and other debris.

You would think I wouldn't have much wear in joints like that being everything is bathed in oil but who knows.

pricejarrell said: Nige would you mind sending me the steering clutch removal and rebuild procedure? Thanks Click to expand... Certainly. See attached. Start from Page 14.

Thanks Nige, and if I could trouble you once more, can you send me the yoke stop bolt adjustment. My manuel says 8mm clearance, I just want to make sure that is the same for wet clutches

8mm is 5/16" if you don't have a metric tape measure.

pricejarrell said: Thanks Nige, and if I could trouble you once more, can you send me the yoke stop bolt adjustment. My manuel says 8mm clearance, I just want to make sure that is the same for wet clutches Click to expand... You'll find it in Step 12 on Page 22 of SENR7918-02 that I uplodaed a couple of posts back. That is in the section that specifically refers to wet clutches.