ruffdog
Super Star Member
- Joined
- Dec 31, 2011
- Messages
- 12,442
- Location
- southern wisconsin
- Tractor
- Bobcat Toolcat 5610G, Deere X744, Cub Cadet IH 982
The main hydraulic pump supplies fluid to the steering system...is your hydraulics functioning? Fluid from the pump goes to the steering control unit at the bottom of the steering column. It has what looks like a little gear pump and valving inside that controls how far you steer L/R. There is a diagnostic port at this item.
From there the fluid goes to the steering selector valve that is rear of the engine. It has 3 solenoids (A, B, and C) that control if it is in front steer or 4ws. Solenoid C is the center one and is open during front steer while A & B are closed. In 4ws, C is closed and A, B are open. I would assume that the 4ws switch in the cab controls this valve.
From there the fluid is directed to the front and rear steering cylinders.
If your hydraulics don't work either...check fluid, pump, etc. If they work normally, check pressure at steering control unit's diagnostic port.(?)
If pressure is fine, are the solenoids on the steering selector valve working? Is the cab switch working?
Did the seals in a steering cylinder suddenly go bad? One bad cylinder may affect both being that they are plumbed together.
From there the fluid goes to the steering selector valve that is rear of the engine. It has 3 solenoids (A, B, and C) that control if it is in front steer or 4ws. Solenoid C is the center one and is open during front steer while A & B are closed. In 4ws, C is closed and A, B are open. I would assume that the 4ws switch in the cab controls this valve.
From there the fluid is directed to the front and rear steering cylinders.
If your hydraulics don't work either...check fluid, pump, etc. If they work normally, check pressure at steering control unit's diagnostic port.(?)
If pressure is fine, are the solenoids on the steering selector valve working? Is the cab switch working?
Did the seals in a steering cylinder suddenly go bad? One bad cylinder may affect both being that they are plumbed together.