Spool Valve

The content of this article reflects changes called for in TSB 26-01-97.





DISASSEMBLY
1. Remove lock nut.
2. Remove adjuster nut with Spanner Wrench C-4381, or equivalent.





3. Remove thrust support assembly out of the housing.





4. Pull stub shaft and valve assembly from the housing.





5. Remove stub shaft from valve assembly by lightly tapping on a block of wood to loosen shaft. Then disengage stub shaft pin from hole in spool valve and separate the valve assembly from stub shaft.





6. Remove spool valve from valve body by pulling and rotating the spool valve from the valve body.





7. Remove spool valve O-ring and valve body teflon rings and O-rings underneath the teflon rings.
8. Remove the O-ring between the worm shaft and the stub shaft.

ASSEMBLY

NOTE: Clean and dry all components, then lubricate with power steering fluid.

1. Install spool valve spool O-ring.
2. Install spool valve in valve body by pushing and rotating. Hole in spool valve for stub shaft pin must be accessible from opposite end of valve body.





3. Install stub shaft in valve spool and engage locating pin on stub shaft into spool valve hole.

NOTE: Notch in stub shaft cap must fully engage valve body pin and seat against valve body shoulder.

4. Install O-rings and teflon rings over the O-rings on valve body.





5. Install O-ring into the back of the stub shaft.
6. Install stub shaft and valve assembly in the housing. Line up worm shaft to slots in the valve assembly.
7. Install thrust support assembly.

NOTE: The thrust support is serviced as an assembly. If any component of the thrust support is damaged the assembly must be replaced.

8. Install adjuster nut and lock nut.
9. Adjust Thrust Bearing Preload and Over-Center Rotating Torque.