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Crawlers, Dozers, Loaders & Backhoes Discussion Forum

D3B Steering Clutchs

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D3BDave

05-24-2006 18:57:27

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It seems as thou the left steering clutchs are slipping on my D3B. Just wondering if anyone has any experience with replacing steering clutchs before. Thought I would inspect the right clutchs too, while I am there. The manual makes it sound like a very interesting job. I wonder what the clutchs cost from Cat? Thanks

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Bob/Ont

05-25-2006 18:58:59

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Re: D3B Steering Clutchs in reply to D3BDave, 05-24-2006 18:57:27

Dave, check and repair as necessary the rollers on the end of the steering valves.
Later Bob

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Farmerford

05-25-2006 15:01:28

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Re: D3B Steering Clutchs in reply to D3BDave, 05-24-2006 18:57:27

I replaced the steering clutches and brake linings on my D3B a couple of years ago. The manual is pretty complete, as I recall. The most trouble came from the brake bands. The brake band andhors bolt to the bottom of the case with four one-half inch bolts each and the bolts were very rusted. The heads of the bolts were so rusty that once all the rust was banged off the head size was about 11/16 rather than 3/4. So I bought a cheap 11/16 impact socket and hammered it onto the head of the bolt. That worked fine to get them out. And I also recall that removing the cross pin that goes through one end of the brake band was a pain. In fact, as I recall now, if I could have gotten the cross pins out I would not have to have removed the brake band anchors bolted to the floor. But since I couldn't get the pins out, I had to remove the anchors.

The manual shows that you just push the pins sideways to get them out, but mine were too rusted to move, and there is no room to get at them with a hammer.

The manual warns against pressing the hub onto the tapered shaft too far because it will split the hub. When I got mine off I found that it was split and the local Cat dealer found me a used one for about $300. I let Cat disassemble the clutch packs and put new linings on the brake bands. I also had the brake "drum" surfaces turned and it made a huge difference in the braking.

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JimInOz

05-25-2006 15:18:15

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Re: D3B Steering Clutchs in reply to Farmerford, 05-25-2006 15:01:28

While we're on the subject.....I'm thinking about buying a D3.Are you guys happy with your D3?
Thanks...Jim

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Farmerford

05-30-2006 10:10:06

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Re: D3B Steering Clutchs in reply to JimInOz, 05-25-2006 15:18:15

My D3B is a 1981 Powershift (3 forward, 1 reverse) with pyramid (swamp) pads and a 10' PAT blade. My only complaint is the pyramid pads. They are too wide and put lots of strain on the chains in rough ground. That will be the case with any wide low ground pressure pads. It also encourages the chains to slip out of the grooves in the track rollers and to climb out of the drive sprockets. I solved those problems by building chain guides.

The pyramid pads also tear up the ground much worse than standard single grouser pads, because the sharp top (point) of each pad digs much deeper into the ground. But there is a tradeoff. I occasionally work in streambeds and the swamp pads are perfect: they are self cleaning, and don't gum up. And they will gain traction in sand and muck that normal pads would either just spin in or sink.

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