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The Allis Chalmers HD10 crawler used, at different times, different friction discs. The fiber discs, (70044478) when new measured 3/16" thick. If the fiber discs are worn down to approx 5/32" or have damaged teeth, they should be replaced. The bimetallic discs used originally were replaced temporarily by the fiber discs above, and then again replaced by a later style bimetallic disc (which were thinner than the bimetallic discs originally used.)

So what do you measure and how many do you use!?

If your discs pass muster, as above, you can use as many as you like until your stack height reaches a height of 4 3/16" (plus or minus 1/16") Begin stacking your discs, WITH A FRICTION DISC FIRST (bimetallic or fiber) and alternate with the steel discs until your stack height reached the correct specification.

Whatever your clutches are equipped with, or whatever you want to equip them with, we have new ones on hand. We have had them made especially to fit your needs when repairing your HD10 steering clutches.

If you are using bimetallic discs, and alternating with steel discs, your clutch will be less prone to seize up, give you longer clutch life, and a higher overall coefficient of friction. You will eliminate the possibility of broken teeth on your fiber discs.  Due to design, the HD10 steering clutch service is more difficult and labor intensive to work on than the simpler HD5, HD6 steering clutch process.

Upgrading to the bimetallic disc pack does cost more and you are the only one that can make the decision between the two different styles of clutch packs.  For some people the labor and inconvenience involved in future steering clutch repair is not a consideration, while for others it is very important. For the difference in cost, you will end up with a superior clutch,  much fewer headaches, and less labor in the future if you convert to the BiMetallic discs.  

GRIMY_Man_SM.jpg (55040 bytes)  We can usually ship on the same day any items we have in stock that do not have to be pulled from a machine. 
We are set up to offer the payment choices of either Visa, Master Card, or the PayPal option (to the account of

Al items below are in stock and if you would like to get any of them on the way just let us know!  If you are in the US you may call  1-800-531-9021 or if you are outside the US, 1 208 342 8911.  You may also email    for orders/questions.

Our hours are Monday through Friday from 10 am Eastern Time to 6 pm Eastern Time (8 am Mtn Time to 4 pm Mtn Time).  We are located 20 miles east of Boise, Idaho. 

044585-->066360 ---> 044478 (70044478) Fiber Friction Discs after market 18.00 ea

ACHD10_STEEL_DISC.jpg (78659 bytes)        041781 --->70624562 Steel separator plates... 17.00 ea

ACHD10_BIMETALLIC_DISC.jpg (85922 bytes)         70609699---057375 (70057375) Bimetallic 27.00 ea


Click HERE to view all of our new steering clutch discs.

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Email             for orders or questions.

CONTACT OUR OFFICE at 1-208-342-8911

General Gear and Machine, 733 Desert Wind Rd.,
Boise, Idaho, 83716  US
*All prices are in USD & do not include shipping
All prices are for new aftermarket unless stated otherwise
All OEM part numbers are for references only


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