Graco ULTRA 500 Instructions-Parts List Manual page 29

19.
Install the connecting rod (29).
20.
Screw the displacement pump about 3/4 of the
way into the drive housing
1181.
Hold the pin
(201
up
to the pin hole in the connecting rod assembly
129)
and continua screwing in the pump until the pin
slides eaaly into the hole. Beck off the pump until
the top threads of the pump cylinder are flush
with
the face of the drive housing and the outlet nipple
1481
is facing back. Push the retaining spring
(351
in-
to the groove all the way around the connecting
rod. Tighten the jam nut
1381
to 75-85 ft-lb
(102-115
N.m)-very tight to prevent it from loosening which
will damage the drive housing. See Fig 24.
I W
groove of the connecting rod, all the way
around,
Be sure the retaining spring (36) is firmly in the
to prevent the pin
( 2 0 1
from working
loose
due to
vibration. See Fig 24.
off due to the force of the pumping action. These
If the pin works loose,
it
or other parts could break
par@ could be projected through the air and result
me
2 4
in serious bodily injury or property damage, in-
cluding damage to the pump, connecting rod or
drive housing.
I
21.
Reinstall the front cover and screws
(31, 32).
hose (47).
Reconnect the suction tube (42) and pump outlet
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