Diaphragms - Graco Husky 716 Instructions-Parts List Manual

Fluid Section Repair Kit D05007 is available. Parts included in the kit are marked with a star (L) in Fig. 4 and in the
Parts Drawing and Parts List on pages 10 and 11. General-purpose grease 111920 and Adhesive 113500 are
supplied in the kit. Service the diaphragms as follows. See Fig. 4.
Disassembly
Relieve the pressure.
1.
See Pressure Relief
Procedure on page 4.
2. Remove the pump from the cart.
3. Remove the vee clamps (48).
4. Remove the manifold (2) and fluid covers (1).
NOTE: Do not lose the manifold O-rings (6), and
make sure all the check valve parts stay in place.
See Fig. 3 on page 7.
5. Remove one of the fluid-side diaphragm plates
(34) (whichever one comes loose first when you
use a wrench on the hex of each), and pull the
diaphragm shaft out of the center housing (3).
6. Use a wrench on the flats of the diaphragm shaft
(74) to remove the other fluid-side diaphragm plate
(34) from the diaphragm shaft.
7. Remove the screws (65) and air covers (66).
Remove all old gasket (70) material from the ends
of the center housing (3) and the surfaces of the
air covers.
8. Remove the diaphragm shaft U-cups (71) and pilot
pin O-rings (12).
9. Inspect all parts for wear or damage, and replace
as necessary.
Reassembly
1. Insert a diaphragm shaft U-cup (71) and a pilot pin
O-ring (12) into their bores in one end of the center
housing (3).
NOTE: Make sure the lips of the U-cup face out
of the center housing.
2. Line up the holes in the gasket (70) with the holes
in the end of the center housing (3), and use six
screws (65) to fasten an air cover (66) to the end
of the center housing. Torque the screws to 40 to
50 in-lb (4.5 to 5.6 N-m).
3. Position the exhaust cover (73) and O-ring (14) on
the center housing (3).
4. Repeat steps 1 and 2 for the other end of the
center housing and the remaining air cover.
8 309009
Service — Diaphragms
5. Apply medium-strength (blue) Loctite (supplied
with Kit D05007) or equivalent to the threads of the
diaphragm shaft screws (35). Install on one end of
the diaphragm shaft (74) the following parts (see
proper order in Fig. 4): air-side diaphragm plate
(37), diaphragm (36), fluid-side diaphragm plate
(34), O-ring (33), and screw (35).
NOTE: The words AIR SIDE on the diaphragm
(36) and the flat side of the air-side diaphragm
plate (37) must face toward the diaphragm
shaft (74).
6. Put grease (supplied with Kit D05007) on the
diaphragm shaft (74), and carefully (do not
damage the diaphragm shaft U-cups) run the
diaphragm shaft through the center housing (3)
bore.
7. Repeat step 5 for the other end of the diaphragm
shaft (74). Torque the diaphragm shaft screws (35)
to 80 to 90 in-lb (9 to 10 N-m) at 100 rpm
maximum.
8. Install the muffler (72).
9. Apply a thin, even film of grease to the insides of
the vee clamps (48).
When you install the vee clamps in step 10, orient the
center housing (3) so the valve chamber cover (15) is
straight up.
10. Position the fluid covers (1), install the vee clamps
(48) around the fluid and air covers, and torque the
vee clamp nuts to 80 to 90 in-lb (9 to 10 N-m).
11. Make sure all the check valve parts are in place.
See Fig. 3 on page 7.
12. Put grease (supplied with Kit D05007) on the
manifold bolts (60), install the manifold (2), and
torque the manifold bolts to 80 to 90 in-lb
(9 to 10 N-m).
13. Install the pump on the cart, and reconnect the air
line to the air inlet fitting (81).