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Allis Chalmers HD4 clutch pack change out

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Ralph Butteris

03-12-2002 12:26:34




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What is the best method to remove the bolts that connect the clutch pack to the pinion shaft without removing the track.




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Bill

03-12-2002 13:34:22




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 Re: Allis Chalmers HD4 clutch pack change out in reply to Ralph Butteris, 03-12-2002 12:26:34  
I have a 652 which is a newer/Industrial HD4 There are holes in the clutch cavity at top bottom & side. Bottom & side take 55 gal barrel bungs for plugs. The one on the side near the sprocket is there to send a wrench in to get to the bolts. Turn the track to turn the flange to line up the bolts with the hole. Its one of the easier machines to do this type job on. A manual would make the job simple. Manuals are available for around $30 & worth every penny in time saved by showing the tricks/techniques....

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Ralph Butteris

03-12-2002 13:57:55




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 Re: Re: Allis Chalmers HD4 clutch pack change out in reply to Bill, 03-12-2002 13:34:22  
Bill, does your 652 have the hydralic foot pedal for the clutch combined with the brake pedal? Mine has that setup and it looks to be a feild modification.

Ralph



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Ralph Butteris

03-12-2002 13:51:02




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 Re: Re: Allis Chalmers HD4 clutch pack change out in reply to Bill, 03-12-2002 13:34:22  
Hey Bill, Thanks for the reply! I have the service manual, but it failed to say the drive spocket should have free movement to allow the clutch pack to rotate for access to all the bolts. After talking with a friend that has an HD6G that did a clutch disc changed, informed me the easiest way to to pull the crawler to rotate the assy for access to all the bolts. That part is solved, now if the manual didn't leave anything else out the should be easy.

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Bill

03-12-2002 17:49:25




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 Re: Re: Re: Allis Chalmers HD4 clutch pack change out in reply to Ralph Butteris, 03-12-2002 13:51:02  
My 652 just has a band brake around the clutch pack activated by linkage from the foot peddle. Steers so easy I wonder why anyone would require hydraulic assistance... Then again I have never run it for 8-10 hours at a clip. That might make me think different. Then again I moved up to this machine from a CleTrac. While bullet proof for their day, they (CleTrac) where built when men were MEN... A couple hours wrastlin with the steering clutches on them in tight places will make a nap mandatory... The only other mandatory trick to getting the clutch pack out is the shaft the pack is driven from. There is a pin when pulled lets the shaft slide into the transmission to let the clutch pack be lifted out. There is a big dimple on the shaft end. You are suppossed to cut about an inch and a half of insulation off of stranded/not solid electrical wire. Ball the bare wire up & set the wire ball into the dimple on the shaft. Shaft can then be slid flush into the transmission housing to get it out of the way with the ball of wire held into the dimple by the shaft sleeve. When you go to put her back you use the wire to pull the shaft out of the transmission. First time I pulled a clutch pack I did not fully grasp that & slid the shaft in as far as I dare while not using/understanding the wire importance and proceeded to lift out the clutch pack. Bumped the shaft & drove it further into the housing.. Played with it for hours to get the shaft out without pulling the transmission apart. After that I figgured out the wire/dimple thing.... Good luck... Oh yeah. I have spent a ton of money on this machine. Around $8 thou in parts. New tracks, sprockets, rollers, rebuilt idlers & engine. LOVE the machine. Hardly ever use her anymore though. By the time I got her all done, so was the needed work. Numerous have inquired to buying it but buy the time I actually decide I THINK I'm interested they find a John Deere for a few thousand more & usually come around asking for help with their undercarriage... Everyone ought to start off with/learn on a Cletrac. Own a 3/4 inch wrench & your a bonafide CleTrac mechanic. When the tracks fall off the machine you paid $1500 or so for once an hour or so, it don't hurt anywhere near as much as when they fall off the $12k plus machine with the fresh paint job that the novice bought. ooops started rambling there. One thing I could never find for my 652 was a ROPS. Should you stumble across one for sale, keep me in mind. THANKS!!!

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Ralph Butteris

03-13-2002 06:26:35




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 Re: Re: Re: Re: Allis Chalmers HD4 clutch pack change out in reply to Bill, 03-12-2002 17:49:25  
Bill, The hardest thing about getting the clutch pack out was the ring that keeps the shaft secured to the clutch pack. I used safety wire on the saft and yo are right, I bumped the shaft and it slid back into the carrier. Today I'll rebuild the clutch pack and the next day get it back into the machine. I took a roll bar canapoy from a ferguson tractor and fab'd to my cramler.

Ralph



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