Drive problem best guess

adsmith72 · Nov 13, 2012

I know I should swap the motors, but I was wanting a best guess from some of the more knowledgeable people on here. Right drive is jerky and weak only in the forward direction. Smooth in reverse and seems to have power. Hydro or motor. Best guess please. Thanks

OldMachinist · Nov 13, 2012

First guess would be the shuttle valve in the motor
Second would be replenishing valve for the forward right side.
Most other things would effect both directions.

adsmith72 · Nov 19, 2012

OldMachinist said:
First guess would be the shuttle valve in the motor
Second would be replenishing valve for the forward right side.
Most other things would effect both directions.

Thanks for the info. Is there a difference in the high pressure replenishing valve and the low pressure replenishing valve? I was thinking of switching a valve out., but can only access one of each easily on the rightside. And if i can switch them what should that tell me? Thanks

adsmith72 · Nov 30, 2012

Well I swapped the motors and the problem followed the motor. I was curouis why the problem went from forward being weak to reverse being weak. I bought a seal kit from LPS, and replaced the seals. I was surprised to find no evidence of a problem. Anyway the motor works fine now. Thanks for the help.

Tazza · Nov 30, 2012

adsmith72 said:
Well I swapped the motors and the problem followed the motor. I was curouis why the problem went from forward being weak to reverse being weak. I bought a seal kit from LPS, and replaced the seals. I was surprised to find no evidence of a problem. Anyway the motor works fine now. Thanks for the help.

Glad it's fixed. The main pressure seals can allow leakage without you knowing it.