Repair
311690M 9
11. Lubricate the throat packings and glands. Install one
male gland (19†), then five v-packings with the lips
facing down: one UHMWPE (20†), one leather
(25†), UHMWPE, leather, UHMWPE. Install the
female gland (26†). Install three v-packings with the
lips facing up: UHMWPE, leather, UHMWPE. Install
the other male gland (19†). Install the packing nut
(21) finger-tight. See F
IG. 8.
12. Install the o-ring (36†) on the throat cartridge (35).
Apply lubricant to the throat cartridge threads then
screw the cartridge into the upper pump housing
(1). Torque the throat cartridge to 100 ft-lb (135
N•m).
13. Tighten the packing nut (21) firmly and then turn the
nut another 1/4 turn. If you have a torque wrench,
tighten the packing nut to 30 ft-lb (40 N•m), then
re-tighten to 15-20 ft-lb (20-27 N•m).
14. Screw the coupling nut (K) and collars (G) onto the
piston rod (H). Torque to 145-150 ft-lb (197-203
N•m). See F
IG. 2.
15. On Viscount I+ pumps, reinstall the pin (A). If neces-
sary, reconnect the hydraulic supply and move the
pump to the middle of its stroke. Install the pin in the
first hole from the end of the coupling.
Repair Kits
Pump seal kits are available for each pump size. Throat
packing kits are also available. See page 19 to order.
Parts supplied in the pump seal kit are marked with one
asterisk in the text and drawings, for example (2*). Parts
supplied in the throat packing kit are marked with a sym-
bol, for example (19†). For the best results, use all the
parts in the kit.
Lower Disassembly
1. Remove the pump from the motor as described on
page 6. See also F
IG. 7.
2. Secure the inlet manifold (18) in a vise.
3. Loosen, but do not remove, the packing nut (21) and
cartridge (35). See F
IG. 7.
4. Remove the four capscrews (9) and washers (8)
from around the outlet manifold (22).
5. Remove the outlet manifold (22), balls (23), seats
(24), and gaskets (7).
6. Remove the three cylinder bolts (13) and lockwash-
ers (14). Lift off the outlet housing (16), along with
the fluid tubes (3), cylinder (1), and piston assembly
(17, 10, 11, 12, 39).
7. Remove the throat cartridge (35) and o-ring (36).
8. Remove the glands (19, 26) and packings (20, 25).
9. Remove the tubes (3) and cylinder (1) from the inlet
housing (15). Pull the piston assembly out of the cyl-
inder.
10. Remove the inlet manifold (18) from the vise.
11. Remove the four capscrews (9) and washers (8)
from the inlet manifold (18). Use a flatblade screw-
driver inserted between the inlet housing (15) and
the inlet manifold (18) to separate them.
12. Remove the balls (5), intake seats (6 and 34), and
gaskets (7).
13. Inspect the pressure relief valve in the seat (6) to
make sure it is not clogged. Press down on the
valve's ball to see if the ball and the spring are free
to move. See F
IG. 4.
Inspect the surface of the piston rod (17). If it is
scratched, replace the piston rod.
One intake seat (6) includes a pressure relief valve
(V). This seat must be located exactly where shown
(the left side as viewed in F
IG. 7). Use the text cast
into the inlet housing as a guide.
F
IG. 4
TI8407a
7
6
ball
spring
pressure
relief
valve
pin
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