18
308147
Service
Reconnecting the Displacement Pump
WARNING
To reduce the risk of pinching or injuring hands or
fingers caught between the hydraulic motor drip
pan and the coupling nut, always use connecting
rod adapter 184595 and tie rods 184596 on
Model 222892 Viscount Pump. Never use con-
necting rod adapter 184451 and tie rods 184452
on Model 222892; those parts do not allow
sufficient clearance between the drip pan and
coupling nut.
NOTE: On Premier models, ensure that the rod adapt-
er (102) has not loosened during maintenance. Proper
torque is necessary to prevent the rod adapter from
loosening during the pump operation.
If the rod adapter (102) has loosened during mainte-
nance, remove the adapter and apply Loctite
R
2760
t
(or equivalent) to the rod adapter and air motor piston
threads, and then torque as specified in Fig. 6.
1.
Screw the connecting rod adapter (102) to the air
motor shaft. Torque as specified in Fig. 6.
2.
Screw the tie rods (107) into the air motor (101).
Using a wrench on the tie rod flats, torque as
specified.
3.
Make sure the coupling nut (103) and the coupling
collars (108) are in place on the displacement rod
(1).
4.
Use at least two people to hold the displacement
pump while another reconnects it to the motor (see
the CAUTION at left). Orient the pump’s fluid
outlet to the air or hydraulic inlet as was noted in
step 3 under Disconnecting the Displacement
Pump. Position the displacement pump (105) on
the tie rods (107).
5.
Screw the nuts (106) onto the tie rods (107) and
torque as noted in Fig. 6.
6.
Screw the coupling nut (103) onto the connecting
rod adapter (102) loosely. Hold the connecting rod
adapter flats with a wrench to keep it from turning.
Use an adjustable wrench to tighten the coupling
nut. Torque as noted in Fig. 6.
7.
Torque the packing nut (3) to 135–169 N
S
m
(100–125 ft-lb).
8.
Reconnect all hoses. Reconnect the ground wire if
it was disconnected. Fill the wet-cup (3) 1/3 full of
Graco Throat Seal Liquid or compatible solvent.
9.
Turn on the air or hydraulic power supply. On
hydraulic pumps, open the hydraulic return line
valve first, then the supply line valve. Run the
pump slowly to ensure that it operates properly.
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