HD5 DOZER RESTORATION HAS BEGUN
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Construction and other equipment
Forum Description: everything else with orange (or yellow) paint
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=64995
Printed Date: 19 Apr 2024 at 9:10pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: HD5 DOZER RESTORATION HAS BEGUN
Posted By: AC Mel
Subject: HD5 DOZER RESTORATION HAS BEGUN
Date Posted: 11 Feb 2013 at 11:21am
We have started restoration proceedings for this HD5 dozer. Yes it is nice to have the convenient tools to work with. We got the tractor running ok and found that the steering problem was a broken sprocket shaft. The yellow HD5 in the last picture is the DONOR tractor and I have already removed a good shaft and will start installation today. My brother has started painting and I'll post more as we go.     |
Replies:
Posted By: Coke-in-MN
Date Posted: 11 Feb 2013 at 1:31pm
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Looking at the break in the axle - I wonder how so much stress could be places on that point . As it is inboard of the sprocket and the axle has a outboard bearing (link belt double row) at end of axle on truck frame. Seems the load would have had to come from the reduction gear system (bull gears). Looks like some further investigation - then looks like you have that side of case open to find any other problems. ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |
Posted By: AC Mel
Date Posted: 11 Feb 2013 at 3:08pm
| Yes, Coke your right it warranted more investigation. It was such a clean break that there weren't hardly any metal filings and it broke so abruptly that it couldn't be run to do more damage. I looked up in there with lights and mirrors and called it good and have begun reassembly |
Posted By: orangeman
Date Posted: 11 Feb 2013 at 3:12pm
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Mel: Nice yard full of equipment. Keep us up to date on your progress. Nice little 5 you have. Good luck on the repairs. Orangeman
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Posted By: DMiller
Date Posted: 11 Feb 2013 at 4:42pm
| I was looking at where the blade attached on the little machine, and wondering if that could side strees the shaft enough to do that, right off the axle support, is the truck saddle mount damaged at all? |
Posted By: Coke-in-MN
Date Posted: 11 Feb 2013 at 5:34pm
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Be sure to check that top set of bearings on first reduction gear - every major failed rear I have seen that top bearing fails and breaks the rear case on outboard of that bearing As the blade hardware pushes against the rear housing - the outboard bearing by sprocket to truck frame is a 2 unit Link-Belt cone and cup bearing, then next inboard of the sprocket is large timken - the break is behind that bearing so flex of shaft it seems could not be stress from outboard of the sprocket without destroying both outboard bearings. ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |
Posted By: ABDave
Date Posted: 11 Feb 2013 at 6:29pm
| Well I'm the latest new guy here, but I just had to sign up when I seen this thread in the making. As a kid, I spent too many hours on an HD5 and an HD7. Or at least I thought it was too many hours at the time. I had the opportunity to operate a 16 and a 21 for a while and thought I had the world by the tail. Now I'm not what anyone could call a seasoned 'cat skinner,' but that 21 was some smooth machine. |
Posted By: David Gantt N.C.
Date Posted: 11 Feb 2013 at 7:32pm
| great pictures , look forward to more and when its done |
Posted By: HD6 Merv
Date Posted: 12 Feb 2013 at 12:07am
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pretty impressive collection of other treasures in your yard too AC Mel. Can see a nice HD6 in there  ------------- tits tyres and tracks they all cost you money |
Posted By: DonBC
Date Posted: 12 Feb 2013 at 12:07pm
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The shaft may have failed from fatigue failure due to its original machining. The failure looks like classic fatigue failure. If somehow the shaft was machined with a very sharp fillet where the bearing surface met the larger diameter toothed section it could have introduced fatigue failure. A few years ago I was asked to examine the output shafts of two angle drives that were used to turn paddles in large vats at a mine's mill. These were two new units identical to older units that had operated without problems for years. The units operated continuously and both failed about a month apart after 1-1/2 years use. They both failed by fatigue where the shaft diameter was turned down for the bearing. I took down all the data including the shaft rpm and plugged it into a formula to predict fatigue failure and it projected within days of when these shafts had failed. The only difference between the old angle drives and the new one's was the radius of the fillet where the shaft stepped down to a smaller diameter. It is also possible that the outer bearing was not in line with the other two and it introduced a slight bending action on the shaft or the outer bearing's mount could shift a little and apply a slight bending action on the shaft. ------------- Jack of all trades, master of none |
Posted By: Coke-in-MN
Date Posted: 12 Feb 2013 at 12:14pm
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Your explanation of the bending action could be a possibility. The mounting area for the truck frame support - the area under machine where the Y section of truck frame fastened to the cast rear housing . On one HD5 BI had there were cracks by the inboard fastening area (the bolted on clamp for shaft) I had to re-shim the outboard bearing after replacing the axle and welding the rear casting. ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |
Posted By: orangeman
Date Posted: 12 Feb 2013 at 7:03pm
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Mel: Wanted to ask a favor, can you post a close up picture of the support that are holding the 5 up in the air. They look to be an excellent choice of support. Channel iron and Ibeam - is that correct? I would like to borrow the idea to use on support for my HD6 while I am working on it. Thank-you...Orangeman
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Posted By: EricPA
Date Posted: 13 Feb 2013 at 8:08am
------------- Life is tough,but it's tougher when you're stupid. - John Wayne |
orangeman wrote:Posted By: Steve allis dozer
Date Posted: 16 Feb 2013 at 5:11pm
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G'day AC Mel Its great to see the AC construction machines being restored as they are slowly being forgotten , you have a nice collection there! How many do you have and can you post some more pictures please? We have a couple in our family 4 hd11 a hd6 and 2 hd3 crawlers other than that there arn't many around where i live. regards steve
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Posted By: Jerry H
Date Posted: 16 Feb 2013 at 8:25pm
| I have purchased a running hd5 May be in contact with you if I have questions. |
Posted By: Coke-in-MN
Date Posted: 17 Feb 2013 at 1:02pm
My HD5G Srl# 26784 1955 year - bought it in 1972 - HD11 ceramic steering clutch plates, ceramic button clutch in main clutch . HV7 Injectors, put on new track in 1978, Below is the HD5 -HD6 track gauge.  ------------- Faith isn't a jump in the dark. It is a walk in the light. Faith is not guessing; it is knowing something. "Challenges are what make life interesting; overcoming them is what makes life meaningful." |
Posted By: AC Mel
Date Posted: 26 Aug 2021 at 6:25pm
| To go with new post |