873 G moving when I start it

[gmc3500]

I have a 873g ser#514142879 When i start it. it wants to move. lap bar up or down it does the same thing. i have to hold the controls handles when i start up. because it starts to jump to one side or the other. if i raise the idle to about half it will stop moving and i can get out of the machine. if I left the idle low it will start to move on its own most of the time it goes to the right. Any idea what my problem can be. I need a starting point.

 

[Bobcatdan]

The steering linkage is worn and out of adjustment. Flip the cab and look at the centering plate on top of the hydrostatic pumps. There steering isn't rocket science, but a service manual would be very handy. For your problem, don't worry about the wear in the steer lever bushings or the shocks, they do nothing for neutraling out the steering.

 

[gmc3500]

The steering linkage is worn and out of adjustment. Flip the cab and look at the centering plate on top of the hydrostatic pumps. There steering isn't rocket science, but a service manual would be very handy. For your problem, don't worry about the wear in the steer lever bushings or the shocks, they do nothing for neutraling out the steering.

I just got the service manual. I will go after it this week end. thank you. i will let you know how i make out.

 

[OldMachinist]

I just got the service manual. I will go after it this week end. thank you. i will let you know how i make out.

With the lap bar up it should only be able to move a few inches before the traction lock(parking brake) stops it unless that's not working.