Have a CAt D3C with Hydrastat that will roll the right track forward when you just touch the brake handle to Lift, and you have No control with the Joystick. Any Help would be appreciated.
Does the machine have any codes
No codes for this series mike, all pilot controlled with mechanical linkages A serial number will help as always. as will more information have you had the machine long ? do you know its history? did the problem just happen or has it been getting worse Has any work been done recently ? Have you checked the pump adjustments and linkages ? Does the joystick have a small amount of movement in all directions? Have you checked under the joystick bonnet to see if the plungers are free and not binding? if I am understanding the problem correctly . You release the park brake and the right hand track starts to move this could be the result of binging linkages not allowing the drive pump to return to the neutral position Or it could be the resolver valves leaking in the joystick causing the drive pump to up stroke