Graco A Series - Reassemble the Coupling Rod and Tie Rods to the Motor; Replace the Throat Packings Without Disconnecting the Lower

Repair
8 311690M
Reassemble the Coupling Rod
and Tie Rods to the Motor
1. Loosen, but do not remove, the screws holding the
adapter plate (J) to the motor (E) on Viscount I+
pumps. See F
IG. 3.
2. Screw the tie rods (C) into the adapter plate (J) and
torque to 50-55 ft-lb (68-75 N•m). On Viscount I+
pumps, the tie rods will engage threaded holes in
the base of the motor.
3. Fill the cavity in the bottom of the motor shaft with
grease. Screw the coupling rod (F) into the motor
shaft until the pin holes align. On Viscount I+
pumps, install the pin (A) in the first hole from the
end of the coupling.
4. Align the lower (D) with the tie rods (C) and loosely
install the tie rod locknuts (B).
5. Insert the collars (G) and screw the coupling nut (K)
onto the coupling rod (F) and torque to 90-100 ft-lb
(122-135 N•m).
6. Torque the screws holding the adapter plate (J) to
the motor (E) to 15-17 ft-lb (20-23 N•m). Torque the
tie rod locknuts (B) to 50-55 ft-lb (68-75 N•m).
Replace the Throat Packings
Without Disconnecting the
Lower
1. Flush the pump, if possible.
2. Stop the pump at the middle of its stroke.
3. Shut off the air or hydraulic supply.
4. Unscrew the coupling nut (K) from the piston rod
(H). Allow the nut and collars (G) to rest on the pis-
ton rod. See F
IG. 2.
5. Cycle the pump slowly to the bottom of its stroke.
6. Relieve the pressure, see Pressure Relief Proce-
dure, page 6.
7. Lift the motor shaft and remove the coupling nut (K)
and collars (G). See F
IG. 2 and FIG. 3.
8. Loosen the packing nut (21). See F
IG. 8.
9. Loosen and remove the throat cartridge (35).
Remove the PTFE o-ring (36). See F
IG. 8.
10. Remove the glands (19, 26) and packings (20, 25).
F
IG. 3
Use this procedure only if the coupling rod (F) and
tie rods (C) have been disassembled from the
motor, to ensure proper alignment of the motor
shaft to the piston rod.
Viscount I+
Pump Shown
TI7674b
Torque to 90-100 ft-lb
(122-135 N•m).
Torque to 50-55 ft-lb
(68-75 N•m).
Apply anti-seize
lubricant.
1
2
3
1
J
C
G
K
3
2
E
B
A
H
F
D
2
3
To replace the throat packings as part of a com-
plete service of the lower, see page 9.
Throat packing kits are available. See page 21 to
order. Parts supplied in the throat packing kit are
marked with a symbol, for example (19†). For the
best results, use all the parts in the kit.
Keep packing nut installed, but loose.