tried sister forklift that is operating.. 7k ohms and.5 or so with handle at limit...

good idea, I was probing at the pot itself and it's in a bad area... I backed the allen screw out, removed pin and gear, spinning pot,

getting readings as high as 12k ohms

Yes. Loosen that Allen screw. Then, follow the pot wires down to the big white connector. Put your meter on the solid brown and solid green wires. Twist the pot until you get the highest reading with the handle in neutral. Could go as high as 6k ohms

allen screw is tight now and i played with adjusting forward and reverse switches, forklift is atleast moving forward and back now but still slow. potentiometer readings are not correct, manual states 4300 to 4600 ohms at neutral and i'm getting 1.9k... also tb11 terminal 1 is 3.5v with key off and changes to 0.5 with max handle movement... with key on terminal 1 is 30v...

im pretty sure the pot. is bad because it doesn't have the resistance it should but could it really be the entire problem?

I was not aware of the allen screw, just the single tab sticking out from the pot base... I will check this allen screw out.

I got the potentiometer to work. Tried installing it according to procedure , install at max ohm, pin, etc. But the pot doesn't have a stop, not sure if its supposed to. It will keep spinning in either direction.... After trying about 6 or 7 different times I finally got it to work for both forward and reverse. my pot sweeps are at 1.9k ohms at neutral,.4 ohm in forward and.3ohm in reverse... This is wrong according to manual. Manual states in neutral it should read 4300 to 4600 ohms. Machine is still extremely slow. less than a creep... charging now to see if anything changes..

There is a tiny Allen screw holding that tight, tiny little hole on the RH side

found potentiometer in multi function control handle spinning freely... played with it while trying to operate and got reverse.. will repair and go from there

Lifted machine off ground, both wheels spin going forward, no reverse. contactors pulling up in both directions.

TB11 voltages are:

1) 30v
2) 0v
3) 0v
4) 0v
5) 36v
6) 36v

It's bad when you see lightning in those motors when you travel

I checked the brushes they seemed to be free but they are worn bad. I pulled the left motor out.. I think it needs either a brush kit for both drive motors or both rebuilt/replaced... I will let the supervisor make the call on that one... Unless there is a way to determine if a motor is really bad or the just needs new brushes?

Before changing that motor out again, check to see if the brushes are sticking in the brush holder they like to do that

Book is on the way, buddy

I freed up the brake linkage on the left side. out of curiosity I tried again, this time, the left motor is moving, but slow. Neither motor works in reverse.. The main bottom contactor is also not pulling in, top pulling in in both directions. bottom is doing nothing. I have a spare contactor I will try, unsure of its health.

tried spare contactor, now both contactors pulling in in both forward and reverse, but forward works and reverse does not, also machine is still very slow.

thanks for the reply Yidneck. I did what you said and the left drive motor is not pulling at all. I had just recently swapped it out from a spare parts forklift too, and forgot to even check it after because I got distracted. ANywho I have one more spare motor, would you know any kind of resistance check or bench test to test these motors? thanks.

Jack up the machine to get the drive tires off the ground and check if both wheels are turning when driving.