Construction and other equipment - hd4 no forward but have reverse

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hd4 no forward but have reverse

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=70888
Printed Date: 28 Jun 2025 at 3:31am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com

Topic: hd4 no forward but have reverse

Posted By: levesque hd4
Subject: hd4 no forward but have reverse
Date Posted: 26 May 2013 at 12:10am

hi is there anyone out there that can help me . i have a 1975 hd4. and now i have no forward but reverse works fine and now i see its filling up the transmission with ATF i have checked out the control valve and everthing seems to be okay in there and i took the cover off where the oil filler is and there was a o ring missing on the foward clutch tube . thought that was my problem but nope and thats when the oil started filling up in the transmission now i'm puzlled if any has any suggestions

Replies:

Posted By: Randaleky
Date Posted: 27 May 2013 at 9:43am

I HATE TO SAY IT , BUT I THINK YOU HAVE A SEAL DOWN BETWEEN TRANSMISSION AND TORQUE HOUSING. THAT WOULD MEAN YOU HAVE A BIG SCALE JOB AHEAD. THE UNIT WOULD HAVE TO BE SEPARATED AT THE TRANS/TORQUE TO INSTALL THE SEAL. THE RINGS ON THE TORQUE CLUTCH ARE PROBABLY WORN ALSO. THIS CONDITION ALLOWS THE FLUIDS IN TORQUE SECTION TO BE RUSHED INTO THE TRANSMISSION. THEY GET PUMPED OUT VERY FAST AND ANY MOVEMENT OF UNIT IS LOST QUICKLY. IF YOU DO NOT HAVE A REPAIR MANUAL YOU REALLY NEED ONE TO DO THE JOB. ONE OF THE LINES ON THE TORQUE CLUTCH MUST BE TAKEN APART TO ALLOW THE SEPARATION OR DAMAGE TO CLUTCH WILL RESULT. THE BOOK WILL GUIDE YOU THROUGH THE PROCESS.