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Service
Reconnecting the Displacement Pump
1. Make sure the coupling nut (104) and the coupling
collars (105) are in place on the displacement rod
(1). See Fig. 6.
2. Use at least two people to hold the displacement
pump while another reconnects it to the motor (see
the CAUTION on page 18). Orient the pump’s fluid
outlet (X) to the air or hydraulic inlet (Y) as was
noted in step 4 under Disconnecting the Dis-
placement Pump. Position the displacement
pump (106) on the tie rods (102).
3. Screw the nuts (103) onto the tie rods (102) and
torque to 68–81 N.m (50–60 ft-lb).
4. Screw the coupling nut onto the motor shaft loose-
ly. Hold the motor shaft (Z) flats with a wrench to
keep it from turning. Use an adjustable wrench to
tighten the coupling nut. Torque to 196–210 N.m
(145–155 ft-lb).
5. Torque the packing nut (2) to 128–156 N.m
(95–115 ft-lb).
6. Reconnect all hoses. Reconnect the ground wire if
it was disconnected. Fill the wet-cup (2) 1/3 full of
Graco Throat Seal Liquid or compatible solvent.
7. Turn on the power supply. Run the pump slowly to
ensure proper operation.
WARNING
To reduce the risk of serious injury whenever you
are instructed to relieve pressure, always follow the
Pressure Relief Procedure on page 12.
8. Before returning the pump to production, relieve
the pressure and retorque the packing nut (2) to
128–156 N.m (95–115 ft-lb).
04994
Fig. 6
1
3
4
2
Torque to 68–81 N.m
(50–60 ft-lb).
Torque to 196–210 N.m
(145–155 ft-lb).
Torque to 128–156 N.m
(95–115 ft-lb).
Square hole is for use
with torque wrench.
101
102
105
104
1
2
106
103
109
1
1
3
4
2
Z
X
Y