Graco Wolverine A261 Series, Instructions-Parts List Manual

Page: 36 / 62

Repair
36 334513N
Check Valve Repair
The following procedures apply to the check valves on
Wolverine Advanced and Wolverine Hazardous Loca
-
tion pumps. F
IG
. 27 shows the placement of the check
valves on a Wolverine Advanced pump.
Inlet Check Valve
1. Follow the
Pressure Relief Procedure
on page 23.
2. Remove the inlet check valve assembly (215).
3. Remove the retaining nut (215c) and piston (215b).
4. Remove the piston o-ring (215a) from the piston (215b).
5. Inspect parts for wear, and replace as needed.
6. Install the piston o-ring (215a).
7. Reassemble the piston (215b) and retaining nut (215c).
Torque the retaining nut to 30-35 in-lbs.
8. Reconnect the inlet check valve assembly (215). Apply
sealant to the exterior threads of the valve assembly.
9. Reconnect and tighten fluid lines.
10.
Prime the Pump
, page 23.
11. If necessary,
Calibrate Chemical Dosage
, page 24.
Outlet Check Valve
1. Follow the Pressure Relief Procedure on page 23.
2. Remove the outlet check valve assembly (216).
3. Remove the retaining nut (216c), spring (216d), and pis
-
ton (216b).
4. Remove the piston o-ring (216a) from the piston (216b).
5. Inspect parts for wear, and replace as needed.
6. Install the piston o-ring (216a).
7. Reassemble the piston (216b), spring (216d), and retain
-
ing nut (216c). Torque the retaining nut to 30-35 in-lbs.
8. Reconnect the outlet check valve assembly (216). Apply
sealant to the exterior threads of the valve assembly.
9. Reconnect and tighten fluid lines.
10.
Prime the Pump
, page 23.
11. If necessary,
Calibrate Chemical Dosage
, page 24.
F
IG
. 27 Check Valve Repair
216c
216b
216a
216
215c
215b
215a
215
210
216d
212
211