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D-20P-5 Komatsu steering clutch question.

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D. Andrews

04-15-2003 04:23:56




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I am well on my way into it to replace steering clutch, is it necessary to pull final drive to get the clutch out or can it be done from the top????..TIA..... ...D..... ...




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RB

04-15-2003 06:45:52




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 Re: D-20P-5 Komatsu steering clutch question. in reply to D. Andrews, 04-15-2003 04:23:56  
It can be done from the top, no need to remove the final drives. Jack it up and put the wooden blocks (cement blocks can shatter from the weight) under the frame, so you can spin the tracks. Use a bottle jack to rotate the tracks to bring the bolts up to the top so you can access them. Be sure you put a strap or chain on the clutch assembly before you take the last bolt out so the clutch does not fall and you have a means to pull it straight up. Good luck!

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D. Andrews

04-15-2003 09:23:20




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 Re: Re: D-20P-5 Komatsu steering clutch question. in reply to RB, 04-15-2003 06:45:52  
Thanks for the reply RB. I am also doing a undercarriage on that side, and a new sprockett and rails, so it is already took appart, short of the final drive and the clutch/break housing cover. I had it appart a few months ago and I dont recall seeing what you describe, but, what I will do is pull that all down befor I drop the final and try to see what you are describing. The controll cylender on that side is what caused all this, the o-rings were leaking and it was spraying the clutch with oil. I have tried to wash it out with no luck. Thanks..... .D.....

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RB

04-15-2003 12:37:27




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 Re: Re: Re: D-20P-5 Komatsu steering clutch question. in reply to D. Andrews, 04-15-2003 09:23:20  
On the steering clutch frame, there are two covers over the steering clutches. These large covers have a smaller cover, held by two bolts, that you can remove to adjust the steering clutches. You remove the large covers to expose the clutches. You can only access one bolt at a time. This is why you block it up, in neutral, so you can rotate the track with a jack to bring up the next bolt. Since you have disassembled that far, you might be able to turn the clutch by hand or with a wrench. My advise comes from experience and a Komatsu parts and repair manual. Actually I don't think you can get to the steering clutches by pulling the finals. Mine are isolated in their own chamber and only have holes for bearings and shafts. Yours might be different, mine is a P-6 and yours is a P-5. If you have it down that far it might be best to pull the finals and replace the bearings and seals. If my memory does not fail me, those final bearing are around $100 each. Expensive, but cheaper than having to tear down again. Hope this clears up your question.

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D. Andrews

04-16-2003 04:32:32




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 Re: Re: Re: Re: D-20P-5 Komatsu steering clutch question. in reply to RB, 04-15-2003 12:37:27  
you know, come to think of it you are exactly right. I went in there through the top last summer and washed out that clutch ( hyd leak from controll cyl. ) and as my memory servs, I remember seeing the larger cover, but I did not take that off, and the hole going out to the final would be too small for it to fit through. I have almost got to it, took seat, valve body, etc off last night, and lack just the housing covers and I will be there. Maybe you could answer another question for me if you dont mind. The reason I am going in there is because it slips and makes this awful noise when turning in one direction, using the same track that is slipping. the slipping is mostly due to a hyd oil leak that I am repairing today. The noise on the other hand is not comming from that side, it is comming from the stopped track, I was unaware of this untill I had my son hold the hand clutch for that side while I was behind it. Adjusting it from the outside stopped the noise, but, to make a long story short, it was not adjusted right. I pulled the controll cyl's off, and the adjustment rod that is between the clutch arm and the cyl. on that side is screwed almost all the way in, which means that when the cyl. strokes out, it would not pust the arm far enough in to completly disengauge the clutch, the other arm is screwed almost all the way out, which may be contributing to the slipping. What is the proper adjustment procedure for this? It would be very very difficult to do this by the trial and error method, you cant get to it with out removing the cyl. at least as far as I can tell ( maybe through the break adjustment hole? )

Again, thanks for all your help, even at my local dealer, there is no one there that knows much about a d-20, and it is nice finding someone who does..... ...D..... ....

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RB

04-16-2003 09:30:35




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 Re: Re: Re: Re: Re: D-20P-5 Komatsu steering clutch question. in reply to D. Andrews, 04-16-2003 04:32:32  
There is an adjuster in the small hole over the steering clutches. This adjuster usually gets frozen on the shaft, due to condensation and brake dust. If it is free, turn it down to 5kgm with a metric torque wrench. Then back it off four complete turns. This will put you back at the factory setting and you will need to fine tune from there.
Because of the tendency of the adjuster to become frozen on the shaft, some people spray a penetrating oil through the adjuster hole. This is an effort to free up the adjuster that usually does not work. This hastens the demise of the steering clutch. Oil and clutches don't mix well as you well know.
When the steering clutches start chattering, its usually a sign of wear indicating that it is time to replace them. Oh the joy of heavy equipment. Think of Tennesee Ernie Ford's song "Sixteen Tons" and substitute the words, "I owe my soul to the counterparts man"!

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D. Andrews

04-16-2003 10:52:45




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 Re: Re: Re: Re: Re: Re: D-20P-5 Komatsu steering clutch question. in reply to RB, 04-16-2003 09:30:35  
I think maybe we are talking about 2 different adjusters. The one I am speaking about is nothing more than all thread rod with a locking nut. It goes through the top of the clutch arm and the end of it is pushed by the controll cyl. to dis-inguage the clutch, I think maybe you are speaking of the break band adjuster on the back of the housing cover. Other than that, there is no access to this rod with out pulling the valve body and cyl off. The break adjusters were as you said, frozen and I heated mine and broke them loose, took them off and put a nice coating of never sieze on them, now putting them back was extream fun, but one thing I have learned on this machine, if and when you do finally get a bolt out, I have replaced most of the ones I have removed, and every bolt I take out gets never sieze befor going back on. and yes the joy of owning large equpt..... .D..... ..

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RB

04-16-2003 12:31:48




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 Re: Re: Re: Re: Re: Re: Re: D-20P-5 Komatsu steering clutch question. in reply to D. Andrews, 04-16-2003 10:52:45  
I sent you a diagram and specs on the linkage. This should explain better than I am able to.



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D. Andrews

04-16-2003 19:19:34




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 Re: Re: Re: Re: Re: Re: Re: Re: D-20P-5 Komatsu steering clutch question. in reply to RB, 04-16-2003 12:31:48  
You were right, the clutch came out just as you said, only trouble I had was turning the input side, that turned out to be tricky, I dont have both sides off the ground, this will soon change when I go back with it. I did not get the e-mail, try sending it to dandrews@telapex.com it should work there. I use the hotmail address when I post or answer q's on the net to keep the spam down. I am an ac tech and a mechanic and answer q's on other boards like this one. again thanks for your time, I do appreciate it..... .D..... ..

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Butch Ferguson

07-19-2006 14:56:07




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 Re: Re: Re: Re: Re: Re: Re: Re: Re: D-20P-5 Komats in reply to D. Andrews, 04-16-2003 19:19:34  
Mr. Andrews,

I read with interest your exchange with RB on pulling the clutch assembly of a Komatsu D-20P, because I am doing exactly the same thing. All the bolts are out, and I have the winch & strap supporting the clutch housing, but I can only get it to move about an inch and a half. Then it hangs. The shop manual says to remove the "clutch pilot" but doesn't show what it is. The parts manual doesn't show a clutch pilot at all. My local Komatsu dealer (Berry Tractor, Springfield, MO) was unable to help, as well.

Can you provide any guidance or assistance?

Thanks very much.

Butch Ferguson

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