Belt coming off pulley at transaxle

T Man44

Member
As I continue to learn the quirks of this AMF mower I have noticed a few times that the belt will
come off the rear pulley when I change gears. Is there an adjustment somewhere for this? The
belt looks to be in good shape.
 
I'm not familiar with AMF (Noma)s Only worked on a few and its been years.

But most gear drives have some type of belt guides to force the belt to stay on the transmission and engine pulleys when the clutch slacks the belt. Sometimes these are discarded when the belt is replaced because they either have to be moved or removed to install the new belt.

(To the owner's eventual regret as then the belt won't stay on.-That's usually right before he sells the mower. Please, no offense meant.)

I bet your mower had something of this sort. Only the parts book or photos from a similar machine would tell you what it probably had. You can probably rig up something that will work.

For instance, I find that a few 1/4" bolts about 6" long, bent in a Z shape and placed in a carefully located hole in the frame, with nuts top and bottom and the free end of the bolt swung over close to the pulley can sometimes work wonders to keep a belt in place.
 
Yes I was wondering if a guide was missing, I'm going to have to find a good picture of what is supposed to be there. I also wondered if the gear change could happen without fully depressing the pedal, so not taking off all the slack to the belt, might also give that a try.
 
In your picture below it looks like a shifter for a 3 speed. A sure-nuff gear drive 3 speed. I wouldn't try to speed shift it as that transmission is probably a Peerless and probably it and its parts no longer available new and difficult to come by otherwise.
Fix your belt problem.
 
Had one of those pea green John Deere mowers that would do that. The belt idler arm was wore out causing the belt to get out of line with the pulleys.
 
I mean when I come to a stop, press the pedal down to shift from 1st to reverse, the belt will sometimes come off the pulley. I am also thinking maybe somewhere akin the way someone replaced the belt with one that is slightly too long.
 
I found this one out last year-

A belt can have a broken inner belt (like a bad tire) causing it to always wing off the pulley or twist when used. I had a deck belt on my Deines that wouldn't stay right. In frustration I finally bought a new belt and it fixed it. The old belt had a learned twist in it. Fixed!

I also have a JD 188 that threw the belt every time you set the parking brake. Same deal. The guides were even still there. New belt - no more problems. Belts are cheap. It may end your frustration.
 
I just went through that. New belt fixed the problem as the other had startes shedding pieces of rubber and that's what caught the pulley ant skewed the belt causing it to come off......while it was at it it broke most of the ears off the transaxle fan too so I had to drop the engine to get to the fan and replace it......found the fan on the www.
 

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