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Farmall M jerking in reverse

T

Trent Couch

Member
Finally after all my hard work I took the tractor out for a drive today it did well in all gears with very little howl at all. I rebuilt the transmission with all new bearings and put super m gears in 1st thru 5th and reverse idler gear this was actually a full matched set no mix matched parts and like I side it is smooth going forward easing off the clutch but in reverse it wants to jerk if I try to ease off the clutch slowly if I let it out faster it is some what smooth and still little howl when it?s in reverse with the clutch out. I was thinking the brake bands were maybe binding I jacked the tractor up with wheels off the ground (without it running) and in reverse and it seems just as hard to turn in reverse as it does forward. Also the backlash feels almost identical just by tugging the tire out and back. It?s got a resurfaced flywheel and new clutch and pressure plate maybe it just needs to be broken in? Just curious if anyone has experienced this before
 

My H also will jerk in reverse. Idle speed and aggressive clutch engagement seems to work best for me. Feathering seems to make it worse.
 
I guess I never really paid it much attention before and it?s been so long since I?ve drove it I didn?t think it did it as bad as it is now but maybe it?s just how all of them are
 
The issue is often the pedal movement is exaggerated by the motion to the rear. Going forward the motion causes the clutch to engage more, going backwards it disengages some causing the jerking. Some are more prone than others. They get better with some time, and experience. In an open area, try putting your foot on the pedal in different ways or braced against a temporary vice grip handle to assist in controlling it. Jim
 
Yeah I can make it fairly smooth but just not by feathering the clutch from the sound of it this is normal maybe once my clutch is broke it it will help some
 
The jerking is being inadvertently caused by the "jerk" in the seat.

When you start out going backwards, your inertia causes you to move forward in relation to the tractor. This causes you to push down on the clutch pedal slightly, disengaging it. Tractor stops, but you are now moving backward, causing you to let up on the clutch slightly, engaging it. Lather, rinse, repeat.

It can really get to jerking if things are just right.
 
My M is also prone to jerking in reverse. It can be annoying, but from comments and explanations here, it seems normal. Congratulations on your successful rebuild.
 
it better not be normal... when someone is standing behind the tractor hooking you up the disc. I sure never noticed jerky reverse in any w6's or 560's when I was backing up to an implement. oil on the clutch plate will sure make it jerk though. and ya I know about the safety thing but that's how we did it.
 
(quoted from post at 11:13:23 02/19/19) it better not be normal... when someone is standing behind the tractor hooking you up the disc. I sure never noticed jerky reverse in any w6's or 560's when I was backing up to an implement. oil on the clutch plate will sure make it jerk though. and ya I know about the safety thing but that's how we did it.
Click to expand...

It isn't, once you figure out how to use the right muscles together so you move with the tractor instead of in the opposite direction.

I never had a problem on a tractor with a solidly mounted "deluxe" seat, but those Monroe seats can really mess up your clutch control in reverse if you can't figure it out.
 
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