Repair; Disassembly; Reassembly - Graco Viscount II Instructions-Parts List Manual

Repair

Disassembly

NOTE: The 3000 and 4000cc pumps are easiest to
repair when left in the Part No. 218742 accessory pump
stand and disassembled as instructed in the lower man-
ual. For repair at a remote location, have another pump
stand available.
1. Relieve the pressure, see Pressure Relief Proce-
dure page 11.
2. Disconnect the hoses from the lower and plug the
ends to prevent fluid contamination.
3. See F . 5. Remove the 2-piece shield (122) by
IG
inserting a screwdriver straight into the slot, and
using it as a lever to release the tab. Repeat for all
tabs. Do not use the screwdriver to pry the shields
apart.
4. Loosen the coupling nut (105) and remove the col-
lars (106). Remove the coupling nut from the piston
rod (R). Unscrew the locknuts (104) from the tie
rods (103). Separate the motor (101) and lower
(102). See F . 6.
IG
5. To repair the air motor or lower, see the separate
manuals listed under Related Manuals on page 2.
Shield Disassembly
ti15759a
F . 5. Disassembly and Reassembly of the Shields
IG
3A0537G

Reassembly

NOTE: If the coupling adapter (108) and tie rods (103)
have been disassembled from the motor, see Reas-
semble the Coupling Adapter and Tie Rods to the
Motor on page 17.
1. See F . 6. Assemble the coupling nut (105) to the
IG
piston rod (R).
2. Orient the lower (102) to the motor (101). Position
the lower on the tie rods (103). Lubricate the
threads of the tie rods. Screw the tie rod locknuts
(104) onto the tie rods. Torque the tie rod locknuts
to 50-55 ft-lb (68-75 N•m).
3. Insert the collars (106) into the coupling nut (105).
a. 750, 1000, 1500, and 2000cc Pumps: Tighten
the coupling nut onto the coupling adapter (108)
and torque to 90-100 ft-lb (122-135 N•m).
b. 3000 and 4000cc Pumps: Tighten the coupling
nut onto the motor shaft (S) and torque to 150
ft-lb (203 N•m).
4. See F . 5. Install the shields (122) by engaging the
IG
bottom lips with the groove in the wet-cup cap (C).
Snap the two shields together.
5. Flush and test the pump before reinstalling it in the
system. Connect hoses and flush the pump. While it
is pressurized, check for smooth operation and
leaks. Adjust or repair as necessary before reinstall-
ing in the system. Reconnect the pump ground wire
before operating.
Shield
ti15770a
ti15758a
Repair
ti15757a
15