Graco 308441ZAD important safety instructions Ball Check Valve Repair

Service

Ball Check Valve Repair

Tools Required

1Apply medium-strength (blue) LoctiteR or equivalent to the threads. Torque to 120–150 in-lb (14–17 NSm). See Torque

Sequence, page 28.

D	Torque wrench
D	13 mm socket wrench

2

Arrow (A) must point toward outlet manifold (103).

D O-ring pick

Disassembly

3Not used on some models.

4Beveled seating surface must face ball (301).

NOTE: A Fluid Section Repair Kit is available. Refer to page 23 to order the correct kit for your pump. Parts included in the kit are marked with an asterisk, for example (201*). Use all the parts in the kit for the best results.

NOTE: To ensure proper seating of the balls (301), always replace the seats (201) when replacing the balls. Also, on some models, replace the o-rings (202).

WARNING

To reduce the risk of serious injury whenever you are instructed to relieve pressure, always follow the Pressure Relief Procedure on page 10.

1.Relieve the pressure. Disconnect all hoses.

2.Remove the pump from its mounting.

3.Using a 13 mm socket wrench, remove the four bolts (106) holding the outlet manifold (103) to the fluid covers (101). See Fig. 10.

4.Remove the o-rings (202, not used on some models), seats (201), and balls (301) from the manifold.

5.Turn the pump over and remove the inlet manifold (102). Remove the o-rings (202, not used on some models), seats (201), and balls (301) from the fluid covers (101).

Reassembly

1.Clean all parts and inspect for wear or damage. Replace parts as needed.

2.Reassemble in the reverse order, following all notes in Fig. 10. Be sure the ball checks are assembled exactly as shown. The arrows (A) on the fluid covers (101) must point toward the outlet manifold (103).

1 106

3

Fig. 10

103

301*

201* 4

202* 3

101

A2

301*

201* 4

202* 3

102

1061

03272B

16 308441