Graco Husky 205 D110 Series Instructions Manual page 14

Replacing Check Valves
Replace each pair of check valves as follows. See F
1. Relieve the pressure, and disconnect the air line
from the pump.
WARNING
To reduce the risk of serious injury whenever you are
instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 8.
2. Remove the eight screws (58) that hold the fluid
cover/center housing assembly on the manifold (52),
and lift the manifold covers/center housing assembly
off of the manifold (52).
20
1
51
58
F . 7.
IG
14 308652ZAM
Service
. 7.
IG
52
21
www.northridgepumps.com
3. Remove and replace the check valves (20), being
careful to orient each check valve exactly like the
one it is replacing. Make sure the check valve/seat
area is clean.
4. Remove and replace the sealing o-rings (21).
Once compressed, o-rings may not be reused.
Make sure the check valve/seat area is clean prior to
fully seating o-rings into fluid cover grooves.
5. Reinstall the fluid covers/center housing assembly on
the manifold (52), install the screws (58) that fasten
the fluid covers/center housing assembly to the
manifold, and torque to 42-47 in-lb (4.5-5.0 Nm).
See Torque Sequence on page 18.
6. Reconnect the pump.
58
ti10665a