Assembly

Fig. 4 Installing drive shaft assembly:

Fig. 5 Installing pump ring:

Fig. 6 Installing rotor vanes:

Fig. 7 Installing pressure plate:

1. Lubricate new O-ring seals with fluid and place in pump housing.
2. If drive shaft oil seal was removed during disassembly, lubricate new seal with fluid. Then install seal in pump body front hub, using a suitable seal driver.
3. Position thrust plate and rotor on drive shaft. Then install rotor retaining ring in groove of drive shaft.
4. Place pump housing on work bench as shown and install two pump ring dowel pins in bore of housing.
5. Install drive shaft assembly in housing, making sure shaft seats properly.
6. Install pump ring in housing over two dowel pins with rotation arrow on ring to rear of pump housing. Arrow on outer edge of pump ring points in direction of pump rotation (counterclockwise when viewed from rear of pump).
7. Install rotor vanes in slots of pump rotor, with radius edge of vanes toward outside of rotor.
8. Position pump housing on two wood blocks and push parts down into place as shown.
9. Lubricate outside diameter and chamfer of pressure plate with fluid to insure against damage to O-ring seals in housing. Then install pressure plate in housing over dowel pins. Ported face of pressure plate goes toward pump ring.
10. Using a 23-4 inch diameter sleeve to apply pressure to outer edge of pressure plate only, press pressure plate in to seat. Pressure plate will travel about 1-16 inch to seat. Do not press or hammer on center of pressure plate as to do so will cause permanent distortion resulting in pump failure.

Fig. 8 Installing pressure plate spring:

Fig. 9 Installing end plate and retaining ring:

Fig. 10 Installing flow control valve and spring:

Fig. 11 Installing pressure union O-ring seal:

11. Install pressure plate spring in pressure plate center groove.
12. Lubricate outside diameter and chamfer of end plate with fluid to insure against damage to O-ring seal in housing. Then press end plate into housing. While holding end plate down in housing, install end plate retaining ring. Be sure end plate is completely and solidly seated in groove of housing.
13. Remove assembly from press and install flow control spring and valve into housing bore with hex head screw entering housing bore first.
14. Install magnet into housing, if used.
15. Position pressure union O-ring seal in bore of housing over flow control valve.
16. Mount pump housing in vise with soft jaws and install pump reservoir.
17. Install pressure union and new O-ring seal in reservoir. Tighten union firmly.
18. Install mounting stud and new O-ring seal in reservoir. Tighten stud securely.
19. Install drive shaft key in slot in shaft. Support shaft on opposite side while installing key. Install reservoir cap.