Outlet Check Valves - Graco e-Xtreme Z25 Operation - Repair - Parts

Outlet Check Valves

1. Perform Pressure Relief Procedure, page 10, and
disconnect unit from power source before removing
or servicing outlet check valve.
2. When replacing outlet check valve, reinstall with
proper flow direction.
Outlet Check Valve Repair
1. Flush pump (see Prime/Flush, page 11). Stop the
pump at the bottom of the stroke.
2. Perform Pressure Relief Procedure, page 10.
3. Disconnect unit from power source.
4. Place a waste container below the outlet check
valve to catch any material.
5. Use two wrenches to loosen the hose, then
disconnect the hose from the outlet check valve
housing.
333208F
6. Use a wrench to loosen the outlet check valve, then
remove the outlet check valve from the pump lower.
NOTE: The pressure drain valve may remain
attached to the outlet check valve housing during
repair if needed.
7. Remove the outlet check valve nut from the valve
housing.
8. Remove and clean all internal outlet check valve
components. Inspect all components for wear or
damage and replace components as needed.
9. Reassemble parts in the reverse order they were
removed; ball guides (3), spring retainer,
compression spring, and ball. Use a small blunt tool
to push the ball in and verify that the ball and spring
move freely.
10. Replace the o-ring and coat with grease.
The o-ring is designed to be crushed and should not
be reused. The o-ring must be replaced every time the
outlet check valve housing is opened. If the o-ring is
reused, damage to equipment could occur.
11. Torque the outlet check valve nut onto the housing
to 75-80 ft-lb (101-108 N•m).
NOTE: If the pressure drain valve was removed for
the outlet check valve repair, reinstall at this point.
12. Reattach the outlet check valve to the pump lower
and verify the flow indication arrow is pointing away
from the pump and that the pressure drain valve
outlet is facing the ground.
13. Attach the dispense hose to the outlet check valve.
NOTICE
Repair
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