Construction and other equipment - 1947 HD7 clutch removel. help

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1947 HD7 clutch removel. help

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=96220
Printed Date: 06 Jul 2025 at 12:05pm
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Topic: 1947 HD7 clutch removel. help

Posted By: stnman4
Subject: 1947 HD7 clutch removel. help
Date Posted: 11 Oct 2014 at 6:20pm

can anyone tell me the easyest way to change out the clutch in a 1947 hd 7 dozer. i was thinking maybe takeing the motor out would be the easyway. maybe not. any in put would be great. thanks

Replies:

Posted By: CAL(KS)
Date Posted: 11 Oct 2014 at 8:03pm

old style monolithic powertrain design. you have to pull the motor to put in a clutch. not until the 50's with the HD15's 11's, and 9's did they start unit construction which allowed clutch replacement without pulling the engine.

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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

Posted By: Coke-in-MN
Date Posted: 13 Oct 2014 at 7:14am

AC - HD5 of 1947 vintage had enough clearance to remove components without disassembling full tractor .

With a 3-71 Detroit it seems they would have also left room to service things .

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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: JC-WI
Date Posted: 13 Oct 2014 at 10:40am

Master manual says Engine needs removing... Requires a 1 ton hoist, a ten foot lengtrh of 1/2" cable or 3/8ths" chain one motor stand or sufficient wood blocks, ample supply of cleaning fluid and at least 6 containers of holding bolts ca, screws etc.

Disconnect battery, remove air cleaners, on late unites the precleaners extend up thru the hood and they do not need to be removedremove hood and front fenders and grill and bumper, drain cooling system, remove radiator, shut off fuel, disconnect all lines rods and wire, engage clutch, remove two plates on spacer and work through the two openings. Remove four spacer to engine capscrews from inside spacer remove 12 capscrews holding master clutch assembly to flywheel. Remove 10 capscrews that holds spacer to engine- 6 removed from outside and four removed thru inspection holes.

Remove bolts from outer end of front motor syupport. Raise outer end of motor support with a bar and remove shims... Caution: in rebuilding, these shims must be installed in their origional positions in order not to alter the motor alignment. Engine can now be removed by attaching chain to hoisting brackets. lifted slightly and moved forward and lifted out....

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He who says there is no evil has already deceived himself
The truth is the truth, sugar coated or not. Trawler II says, "Remember that."

Posted By: DiyDave
Date Posted: 13 Oct 2014 at 5:49pm

Take pictures as you dis-assemble, so you can put it back together when you get the parts. Everything snowballs bigger, except time and memory...