Check Valve Repair - Graco Wolverine Advanced Instructions-Parts List Manual

Repair

Check Valve Repair

The following procedures apply to the check valves on
Wolverine Basic, Wolverine Advanced, and Wolverine
Hazardous Location pumps. F
ment of the check valves on a Wolverine Advanced
pump. On a Wolverine Basic pump, the outlet check
valve (25), is on the side of the fluid cylinder.
25d
25e
25c
25b
25a
24d
24c
24b
24a
F . 35 Check Valve Repair
IG
38
. 35 shows the place-
IG
11
Inlet Check Valve
1. Follow the Pressure Relief Procedure on page 22.
2. Remove the inlet check valve assembly (24).
3. Remove the retaining nut (24d) and piston (24c).
4. Remove the piston o-ring (24b) from the piston
(24c).
5. Inspect parts for wear, and replace as needed.
6. Install the piston o-ring (24b).
7. Reassemble the piston (24c) and retaining nut
(24d).
8. Reconnect the inlet check valve assembly (24).
9. Reconnect and tighten fluid lines.
10. Prime the Pump, page 22.
11. If necessary, Calibrate Chemical Dosage,
page 23.
Outlet Check Valve
1. Follow the Pressure Relief Procedure on page 22.
2. Remove the outlet check valve assembly (25).
3. Remove the retaining nut (25d), spring (25e), and
piston (25c).
4. Remove the piston o-ring (25b) from the piston
(25c).
5. Inspect parts for wear, and replace as needed.
6. Install the piston o-ring (25b).
7. Reassemble the piston (25c), spring (25e), and
retaining nut (25d).
8. Reconnect the outlet check valve assembly (25).
9. Reconnect and tighten fluid lines.
10. Prime the Pump, page 22.
11. If necessary, Calibrate Chemical Dosage,
page 23.
334513E