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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

Started taking the 931B apart...

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Stick welding

07-20-2014 20:53:20

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I didn't get as much rain as I thought so started taking the Cat apart Sunday. A friend brought his pressure washer out and I cleaned what I could. I couldn't get at the back under the battery very good because to take the back panel off, I need to disconnect the hyd. lines for the backhoe. Why couldn't there be slots so it can slide up over the lines...Arg! I loosened the lines and oil ran out enough I figured it might drain the hyd. tank so I pumped the oil out of the hyd. tank.

I let it dry for a bit, then moved it about 20' where I could work on it before I drained the hyd. oil. Does a right brake turn but I noticed the right steering valve still leaks at the back cap after I tightened it? Can't remember if it uses an O-ring or a gasket, I think an O-ring. Should I be taking it back to the place that rebuilt it? It is also obvious someone has been into the steering clutch's and final drive compartments before. Gobs of clear silicone on the right and final drive covers and some kind of white caulk like stuff on the left cover. I need a pressure washer again because there was a lot dirt at the back. I got a copy of the procedure to remove the steering clutches but I'm going to see if the shop can also send me a copy of the procedure to remove the fuel and hyd. tanks. Hopefully they can just be loosened but I don't know what all holds them on. In the procedure for removing the clutches it shows how to take individual components apart. I don't know if these have to be taken apart or it's optional if you want to fix them yourself? I think I'd feel better having them checked by an experienced shop although it's not cheap. The other thought I have since I'll have it all apart is to have both sides checked out and fix what ever needs fixing. Is this a dumb idea to spend even more money or is worthwhile when I have it so torn apart? The only good thing is it's at a good height to work on. Bob, when are you coming to Alberta again? Have I got a job for you. LoL

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07-21-2014 07:05:30

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 Re: Started taking the 931B apart... in reply to Stick welding, 07-20-2014 20:53:20  
Have a look at both sides, the hoe makes it hard to get in there. Not coming out this year Dave.
Later Bob

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Stick welding

07-21-2014 21:11:03

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 Re: Started taking the 931B apart... in reply to Bob/Ont, 07-21-2014 07:05:30  
I took the hoe off as soon as I got the starter back in. The only thing the hoe would be good for is lifting the machine up but I have a 20 ton jack. Now for putting the track frames and tracks on, the hoe makes it pretty easy.

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07-21-2014 16:56:31

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 Re: Started taking the 931B apart... in reply to Bob/Ont, 07-21-2014 07:05:30  
Check the bevel gear shaft bearings.
Later Bob

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07-20-2014 22:04:53

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 Re: Started taking the 931B apart... in reply to Stick welding, 07-20-2014 20:53:20  
Glad to hear you've finally had a chance to get into it, at the same time I"m sorry to hear you had to go into it so deep. That said, one thing I always tell my customers is that when you get so far into a repair, there are things that ought to be done while there. At the moment I've got a D6 I've got to go in to replace the brakes. While there the steering clutches are going to be checked, and gone through if needed. Given that they have to come out to get the brakes out, it doesn't make sense to do the job halfway now and have to go back in later, at twice the cost. True I love job security, but I hate to make it happen by being slack.

In your case, when your doing the work yourself, you might get away with not doing the clutches if the stack height is within specs. Now if you plan to use it a lot, and the stack height is close to being worn out, then it would be worth your time to do them while there. By the same token, if you"ve got over half of the life left, then you might be good just letting them go, and they"ll be good for quite a few years to come.

As far as taking them apart, that typically requires a press, and a "special tool" (ie- a plate with holes in the right places) to get them apart safely. Without the right stuff, or the capability to make the right pieces, you"d be better off taking them to someone that has the correct tools.

Parts wise, I think I have posted this link before, but Offroad Equipment Parts in Tenn has great prices on both aftermarket, as well as OEM CAT parts.

Good luck.

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Stick welding

07-20-2014 22:13:26

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 Re: Started taking the 931B apart... in reply to NCWayne, 07-20-2014 22:04:53  
The procedure was showing how to take apart the levers and shafts in assemblies after they're out. It seemed odd to have it in the middle of the procedure for taking the clutches out as a unit.

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