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Hd11b new owner 
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Joined: 20 May 2019
Location: NSW AUSTRALIA
Points: 6
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 Topic: HD11 B clutch ring unmovable
Posted: 28 May 2019 at 3:27am |
Hi all I'm new to Dozers and have recently bought a Hd11b, I'm guessing around 1958 model I'm wanting to clear about 300 acres of light regrowth, and have come across an issue with the clutch adjustment ring, I believe its over adjusted and the ring is stuck unmovable, any ideas on how to loosen up the adjuster ring and any details about my machine would be great HD11B-7265 Regards Graeme 
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CAL(KS)
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Joined: 18 Sep 2009
Location: Chapman, KS
Points: 3800
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Posted: 28 May 2019 at 7:42am |
are you using a bar to pry it or a punch and hammer? obviously you only want to adjust when the clutch is disengaged. try using a hammer and large drift to knock it loose, if that doesnt work you may need to pull things apart and see whats going on. i wouldnt be soaking it with any oils because you may compromise the clutch material.
make sure the locking tab is disengaged if you didnt know there was one.
Edited by CAL(KS) - 28 May 2019 at 7:43am
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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20
Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15
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Hd11b new owner
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Joined: 20 May 2019
Location: NSW AUSTRALIA
Points: 6
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Posted: 28 May 2019 at 7:24pm |
Hi Cal(KS) and thank you for your reply, I have disengaged the clutch loosened the locking Tab, and tried to move the ring both directions with a pinch bar and a Hammer and drift, it may have moved 1/4 an inch maybe less but its defiantly not moving more and I don't dare swing harder on the hammer, I can turn the entire assembly around but not just the adjusting ring. My Closest AC dealer is a 6 hour round trip away and after chatting with him on the phone he said it could be a dry clutch but to me visually its a wet clutch housing and the clutch has oil splashing around inside, The reason I need to adjust it is that the Machine creeps forward in gear with clutch lever forward, and its very hard to stop the shaft spinning with the clutch brake (clutch Brake New and adjusted) seems like the clutch is Over adjusted and I need to back it Off a Bit, the pull on the clutch lever is 30lbs operating manual says 10-20lbs, repair manual says 35lbs, my guesses are 1. thread between ring adjuster and pressure plate is bound up bad( if there is a thread I don't know because I've never had it apart) 2. dry clutch plate installed in a wet clutch system, I don't know if the two are interchangeable just guessing, 3. mechanical failer in the throw out mechacnism of the clutch any other possibilities or suggestions I'm all ears I was hoping for a simple fix But looks like I need to pull the clutch assembly off, Any advice would be much appreciated on the removal of the assembly IE tricks to getting it out as Im a one man band, Thanks in advance Graeme 
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CAL(KS)
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Joined: 18 Sep 2009
Location: Chapman, KS
Points: 3800
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Posted: 29 May 2019 at 7:44am |
i have never been into a wet clutch machine. I dont see how the ring could ever sieze up with oil on it, so it would undoubtedly have to be some kind of mechanical failure. ie, the clutch lining has pulled up and folded over/wedged, a rivet has come loose in there, or perhaps one of the cams has failed and gotten a piece behind the pressure plate.
sounds like youve investigated enough that pulling the assembly is required. hopefully someone else will chime in here, maby we missed something
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Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20
Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15
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tadams(OH)
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Joined: 17 Sep 2009
Location: Jeromesville, O
Points: 10678
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Posted: 29 May 2019 at 3:35pm |
Is there a tab that is bent to hold it from turning
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Lazyts
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Joined: 05 Feb 2012
Location: Manitoba
Points: 631
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Posted: 29 May 2019 at 6:40pm |
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Should be about a 1962 model, wet clutch started in 1961. I wouldn't worry about adjusting it- as near as I can figure that creeping is just the nature of the beast. We had two of them- HD11Es, a '62 and a '68, and they both were the same. I talked to other guys who had the same problem. In cold weather we would start them and let them warm up, then shut them off and fire them up in gear to get started, then shift fast! No amount of adjusting of clutch or brake changed things- I went through the same things, backed off clutch, installed new clutch brakes, etc. There just isn't enough clearance for the oil, and it creeps. You can stop in initially with the brake, just for a second if the brake is tight, but then the oil will start to drive it. It will even move the machine sometimes! This problem may have been addressed with the redesigned Series B clutch, but I'm not sure..
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Lazyts
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Posted: 29 May 2019 at 6:41pm |
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Run the thinnest oil you can get 10W
Edited by Lazyts - 29 May 2019 at 6:42pm
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Hd11b new owner
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Joined: 20 May 2019
Location: NSW AUSTRALIA
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Posted: 31 May 2019 at 6:44am |
Good News Guys, I managed to loosen the adjuster ring and got the clutch lever pressure to 25lbs It took one complete turn of the adjuster ring, sweats as, drove her out of the shed and the clutch brake is working much better I,m cheering  just have to put the belly plate back on and im away, thank you very much for your help both of your replies helped considerably, Im going to research some thinner oil as well 5w or something like that, any how thanks again Cheers Graeme
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oldyeller
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Joined: 30 Jul 2019
Location: PA
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Posted: 30 Jul 2019 at 7:41pm |
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So how did you manage to get it loose? I am interested because I just purchased a HD6G that seems to have the same problem. any info would be great.
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gemdozer
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Joined: 17 Sep 2009
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Posted: 31 Jul 2019 at 11:15am |
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What cluch model ROCKFORD or AUBURN your machine use the adjustement is't the same and dry or wet cluch.
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Hd11b new owner
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Posted: 19 Aug 2019 at 12:54am |
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Hi Guys, yes I loosened the locking tab then pryed the ring around it took super human force and two double jointed wrists 😁, it seemed that he dozer had been used with the locking tabs loose hence the clutch plate had over tightened to a redicious point, I used small crow bars and Tyre levers and Hammers and blocks of wood, I nearly fainted when I saw the ring just slightly move and the more I worked it the easier it moved,
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Hd11b new owner
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Location: NSW AUSTRALIA
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Posted: 19 Aug 2019 at 12:55am |
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Gem dozer it's a wet clutch model
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gemdozer
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Posted: 19 Aug 2019 at 6:16am |
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You could removed the tab lock and try adjusting clockwise and comback counturncluch wise maybe the treads are like welding together .
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