Graco 223-773 A Series Instructions And Parts List page 17

Installing the Pump
1. Screw the displacement pump into the bearing
housing (27) until the pin holes align. See Fig. 36.
2. Install the pin (221*). See Fig. 37.
3. Continue to screw the pump into the bearing hous-
ing until the top threads of the pump cylinder are
flush with the face of the bearing housing and the
outlet nipple is straight back. Push the retaining
spring (35) into the groove all the way around the
connecting rod to prevent it from working loose
due to vibration. See Fig. 38.
WARNING
MOVING PARTS HAZARD
If the pin works loose, it or other parts
could break off due to the force of the
pumping action. These parts could be
projected through the air and result in serious bodi-
ly injury or property damage, including damage to
the pump, connecting rod or bearing housing.
4. Tighten the locknut (38) to 70 ft-lb (97 N.m). See
Fig. 39.
CAUTION
If the locknut (38) loosens during operation, the
threads of the bearing housing (29) will be dam-
aged. Be sure to tighten the locknut firmly.
5. Tighten the packing nut/ wet-cup just enough to
stop leakage, but no tighter. Fill the wet-cup/pack-
ing nut 1/3 full with Graco TSL. See Fig. 40.
Fig. 36
Displacement Pump
02579
Fig. 37
35
Fig. 38
Fig. 39
Fig. 40
221*
02580
02581
Torque to
70 ft-lb
(97 N.m)
02582
02583