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WARNING
To reduce the risk of serious injury, follow the
Pressure Relief Procedure on page 11 before
Removing the pump
(See Fig. 16.)
1.
Flush the pump, if possible. Relieve pressure.
Stop the pump with the piston rod (107) in its low-
est position, if possible. To lower the piston rod
manually, rotate the motor fan blades.
2. While pulling upward on the suction hose
(32),
unscrew the hose from the inlet tube (38). Un-
screw the drain hose (33) from the displacement
pump nipple ( 3 6 ) .
NOTE: If repairing only the intake valve assembly, go
to Intake valve repair, page 23.
3 .
Use
a screwdriver to push the retaining spring
(18) up and push out the pin (17).
4.
Loosen the screws (21). Remove the pump (20).
installing the pump
(See Fig. 16 and 1 7 . )
1.
Mount the pump on the drive housing. Tap it into
the alignment pins with a soft hammer. Tighten
the screws (21) to 50 ft-lb (68 N.m).
2 . Align the hole in the rod (107) with the connecting
rod assembly
(1 5 ) .
Use a screwdriver to push the
retaining spring (18) up and push in the pin ( 1 7 ) .
Push the retaining spring (18) into place around
the connecting rod.
WARNING
Be sure the retaining spring (18) is firmly in the
groove all the way around, to prevent the pin (17)
from working loose due to vibration. See Fig. 17.
off due to the force of the pump action. These
If the pin works loose,
it
or other parts could break
serious injury or property damage, including the
parts could be projected into the air and result in
pump connecting rod or bearing housing.
3.
Replace the O-ring (27) if it is worn or damaged.
Reconnect the suction and drain hoses (32,33).
Install the front cover (13).
4.
Tighten the packing nut (102) just enough to stop
cup 1/3 full with Graco TSL. Push the plug (123)
leakage, but no tighter. Fill the packing nut/wet-
into the wet-cup.
1 5
123
18
102
Fig.
17
OlW
22 308-216
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