Graco GM3500 SPRAYER 231-078 Instructions And Parts List page 19

REPAIR
NOTE: Refer to Fig
19-1
for Step
14.
14.
Screw the displacement pump about
3/4
of the way
into the bearing housing
(21).
Hold the pin
(25)
up to
the pin hole in the connecting rod assembly
(22)
and
continue screwing in the pump until the pin slides
easily into the hole. Back off the pump until the top
threads of the pump cylinder are flush with the face of
the bearing housing and the outlet nipple
(87)
is fac-
groove all the way around the connecting rod.
ing back. Push the retaining spring
(26)
into the
Tighten the locknut (27) very tight
-
about.65 to 75
ft-lb
(90
to
100
N.m) -with a
2-1/4
in. open end
wrench and a light hammer.
WARNING
To reduce the risk of the pin (25) being projected into
the air and resulting in serious bodily injury, including
injury to the eyes, or property damage, including
damage to the pump connecting rod or bearing
housing:
Be sure the retaining spring
(26)
is firmly in the
groove all the way around, to prevent the pin (25)
from working loose due to vibration.
If the pin works loose, it or other parts could break off
due to the force of the pump action. These parts
could be projected through the air.
15.
Reinstall the front cover and screw
(23,68).
Recon-
See Fig
18-1.
nect the suction tube
(30)
and pump outlet hose (59).
Fig 19-1
307-893
19