[watglen]

I have a 2166 rwa. It has the weirdest problem with jerky (as in not smooth) movement when in 4wd. its hard to describe but really obvious in the seat.

Its worse in reverse, but this is what happens. When you pull up to a wagon in 4wd and start unloading, then pull the speed control into reverse to gently back up a bit to shift the pile, the combine lunges rearward about 2 feet.

It only happens in 4wd, is much worse in reverse than forward, and only happens when moving from stopped.

The dealer has checked the speed control linkage, and swapped the control valve on the rear axle, with no change.

Any ideas?
Thanks.

 

[hydro100]

Need to flow rate the wheel motors. Sounds like one has failed. The sooner you find out the less chance of wiping out the hydro.

 

[watglen]

The dealer kinda thought it might be one of the drive motors.

The dealer assist system has nothing on this problem.

How would a failed motor cause this symptom?

 

[amax]

Hi

Does it only do this in rwa?



Run an extra power and ground wire down from the battery and see if that helps.
Remember power and ground.

Amax

 

[redhat]

Is the rwa factory installed original or swapped from another combine? Make sure it is plumbed correct for a 2166 if it was swapped. Heard this same issue on a 2366 that had a rwa put on from a 1600 series. Did exactly what you describe including being worse in reverse.

 

[watglen]

Further on this, we took the hydraulic motors off the rear axle, and delivered them to the dealer for a look inside. They didn't say anything about the any metal damage, but they did replace two black rubber things that look like top hats. Mine were collapsed, they are supposed to be the shape of a top hat.

What are these things, and what do they do?


Ken