Pump

Disassembly

1.  CAUTION: To ensure correct reassembly, record or mark all information as specified in the procedure.

   NOTE: Clean all dirt and oil from the external surface of the power steering pump (3A674) after removal. Handle all pump parts carefully to avoid nicks, burrs, scratches and dirt.

   Tip the power steering pump to drain all oil from the intake tube. Rotate shaft to remove oil from internal cavities.

2.  CAUTION: Do not clamp on the power steering pump or power steering pump pulley (3A733).

   Using the power steering pump bracket (3A732), clamp the power steering pump into a bench vise.

3. Remove power steering pump pulley with Steering Pump Pulley Remover T69L-10300-B.

   
   
   
   
   

4. Push in on the pump rear cover to compress power steering pump flow control valve spring (3D586).

5. Using pliers, remove hook spring ring from radial groove in power steering pump housing (3A643).

   
   
   
   
   

6. Remove cover and power steering pump flow control valve spring. Remove internal O-ring and backup ring from rear cover. O-ring is inboard of backup ring.

   
   
   
   
   

7. Remove the circlip from the groove.

   
   
   
   
   

8. Turn the power steering pump housing over and remove the rear faceplate. Remove O-ring and backup ring for the rear faceplate from thepower steering pump housing.

9. NOTE: The O-ring is outboard of the backup ring. Check direction of rotation (arrow on cam ring) and location of the set pin.

   Remove the rotor assembly (rotor, cam ring, vanes and set pin) and front faceplate from the power steering pump housing.

   
   
   
   
   
   

   Item	Part Number	Description
   1	—	Front Faceplate (Part of 3A674)
   2	—	Set Pin (Part of 3A674)
   3	—	Backup Ring (Part of 3A674)
   4	—	Rear Faceplate (Part of 3A674)
   5	—	O-Ring (Part of 3A674)
   6	—	Cam Ring (Part of 3A674)
   7	3D607	Power Steering Pump Rotor

10. Clamp driveshaft in vice (use soft jaws) and, with a soft mallet, tap on the power steering pump housing to remove the driveshaft from thepower steering pump housing.

    
    
    
    
    

11. If the ball bearing is to be replaced, remove the retaining ring and press the bearing from the driveshaft.

    
    
    
    
    

12. If the shaft seal requires service, pry the seal from the power steering pump housing. Discard the seal.

13. If the needle bearing requires service, press the needle bearing from the power steering pump housing.

    
    
    ZF Power Steering Pump, Disassembled View
    
    
    
    
    
    

    Item	Part Number	Description
    1	3A733	Power Steering Pump Pulley
    2	—	Driveshaft (Part of 3A674)
    3	—	Circlip (Part of 3A674)
    4	—	Ball Bearing (Part of 3A674)
    5	—	Shaft Seal (Part of 3A674)
    6	—	Needle Bearing (Part of 3A674)
    7	—	Retaining Ring (Part of 3A674)
    8	3D607	Power Steering Pump Rotor
    9	—	Backup Ring (Part of 3A674)
    10	—	Rear Faceplate (Cover Side) (Part of 3A674)
    11	—	O-Ring (Part of 3A674)
    12	—	Cover (Part of 3A674)
    13	—	Label (Part of 3A674)
    14	—	Hook Spring Ring (Part of 3A674)
    15	—	Backup Ring (Part of 3A674)
    16	—	Pressure Spring (Part of 3A674)
    17	—	O-Ring (Part of 3A674)
    18	—	Faceplate Drive Side (Part of 3A674)
    19	—	Pin (Part of 3A674)
    20	—	Plate (Part of 3A674)
    21	3A643	Power Steering Pump Housing
    22	—	Valve Piston (Part of 3A674)
    23	—	Pressure Spring (Part of 3A674)
    24	—	Screw Plug (Part of 3A674)
    25	—	Cam Ring (Part of 3A674)
    26	—	Vanes (10) (Part of 3A674)
    27	—	Seal Ring (Part of 3A674)
    28	—	Set Pin (Part of 3A674)

Assembly

1. If removed, press a new needle bearing into power steering pump housing.

2. If removed, install a new shaft seal in the power steering pump housing.

3. If removed, press a new bearing onto the driveshaft. Install the retaining ring in the driveshaft groove.

4. Install the driveshaft and bearing assembly into power steering pump housing.

5. Install the bearing circlip in the groove.

6. Install O-ring and backup ring on the rear faceplate in accordance with exploded view.

7. Install the set pin, front faceplate and power steering pump rotor (3D607) into power steering pump housing. The cam ring of the power steering pump rotor must be installed with the arrow pointed in the direction of rotation.

8. Install the O-ring and backup ring in the rear cover housing in accordance with exploded view.

9. Place the rear pressure spring in the rear faceplate. Position the rear cover in the housing.

10. Press down on the rear cover plate. Install the hook spring ring in the groove in power steering pump housing.

11. Press on the power steering pump pulley with Steering Pump Pulley Replacer T65P-3A733-C.