Graco Python A25177 Instructions Manual page 31

Outlet Check Valve Repair (models
PCI-xxx-xxH only)
1. Follow the Pressure Relief Procedure, page 17.
2. Remove the outlet check valve assembly (18).
18e
18d
18c
18b
18f
F . 20 Outlet check valve assembly
IG
3. Separate the front housing (18e) from the back
housing (18f).
4. Remove the spring (18b), piston (18c), and piston
o-ring (18d).
5. Inspect parts for wear, replace as needed.
6. Install the piston o-ring (18d), piston (18c), and
spring (18b).
7. Reattach the back housing (18f) to the front
housing (18e)
8. Reconnect the outlet check valve assembly (18).
3A4386C
18
Repair
31