Adjusting valves on 7060 - 426 motor
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Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=210125
Printed Date: 19 Feb 2026 at 10:25pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: Adjusting valves on 7060 - 426 motor
Posted By: Peter5.9
Subject: Adjusting valves on 7060 - 426 motor
Date Posted: 19 Feb 2026 at 1:53pm
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Going to be adjusting valves on our 7060 with the 426, never done it on these motors before used to big truck motors that have ABC on a pulley to know what is timed to be able to adjust. Please fill me in on everything i need to know!
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Replies:
Posted By: SteveM C/IL
Date Posted: 19 Feb 2026 at 2:33pm
Best to remove valve cover and watch the valves. When it's off see which ex valve is down. Doesn't matter where you are beginning as long as you go through them all in order. Rotate in direction of rotation and watch that ex valve close and it's paired int valve just start to open. STOP! Now find it's "buddy" cylinder and do both valves as it will be up on compression. 1&6 are buddies, 2&5 are buddies and 3&4 are buddies. Firing order 153624. You can go to the trouble of putting timing mark on balancer to find 1 or 6 but not necessary. Just look for the down ex and star there. Chalk mark each when done helps keep track.
Clear as mud?
What big motor has A,B,C? never seen such on my Cats.
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Posted By: Peter5.9
Date Posted: 19 Feb 2026 at 2:56pm
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Makes perfect sense will do that way. Our ISM & N14 cummins have ABC on the accessory drive pulleys
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Posted By: DrAllis
Date Posted: 19 Feb 2026 at 6:58pm
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Be prepared to do some heavy duty cleaning of dirt and debris from the valve cover to the intercooler area, as it will be nasty. And, as soon as you remove the valve cover this dirt falls right down inside the engine. Valve clearances are .017" intake and exhaust when COLD.
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Posted By: cowkicker
Date Posted: 19 Feb 2026 at 8:04pm
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When you get the valve cover off. get cylinder #1 on compression stroke and turn it to TDC, 0 degrees, then counting from the front of the engine to the rear of the engine, adjust the first, second, fourth, fifth, eighth, and ninth valves. When finished with those turn crankshaft 360 degrees to TDC, 0 degrees and then you can adjust the third, sixth,seventh, tenth, eleventh, and twelve valves. Its a bit easier to draw it out on a piece a paper, lay it in front of you on the head and you can do it by yourself
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