Assembly Procedure

If disassembled, reassemble the valve assembly in the following manner:
1. 1.1. Alternately install the valve body teflon rings (5) and the O-ring seals (4).
2. 1.2. Install the valve spool O-ring seal (2) to the valve spool (1).
3. 1.3. Lubricate the valve spool (1) and O-ring seal (2) with power steering fluid.
Fig 1: Installing Steering Gear Valve
Courtesy of GENERAL MOTORS CORP.
Simultaneously push and rotate the valve spool (2) into the valve body (1) until the hole (3) in the valve spool (2) for the stub shaft pin is accessible from the opposite end of the valve body (1).

Fig 2: Identifying Valve Spool, Valve Body & Hole
Courtesy of GENERAL MOTORS CORP.
If necessary, install the stub shaft to the valve spool in the following manner:
Lubricate the stub shaft assembly (3).
1. 3.1. Insert the stub shaft (3) into the valve spool.
2. 3.2. Insert the pin.
  Important: Make sure that the shaft cap notch (1) is mated with the valve body pin before installing the valve body into the steering gear assembly.
3. 3.3. The notch in the cap (1) must fully engage the valve body pin (2). Seat the cap against the valve body shoulder.
Fig 3: Installing Stub Shaft To Valve Spool
Courtesy of GENERAL MOTORS CORP.
Install the stub shaft (7) and valve assembly (6) to the worm shaft (5). Ensure the pin fits in the worm shaft to the slot in the valve assembly.
Install the thrust support assembly. Refer to Steering Gear Thrust Support Replacement - Off Vehicle .

Fig 4: Installing Stub Shaft & Valve Assembly
Courtesy of GENERAL MOTORS CORP.