Graco Husky 3300, Запасные части

Страница: 16 / 42

Repair
16 3A0411A
Reassembly of Standard Diaphragms
NOTE: If your pump has overmolded diaphragms, see
page 19.
PTFE Diaphragms
1. Clean all parts and inspect for wear or damage.
Replace parts as needed.
2. Clamp the shaft flats in a vise.
3. For metal pumps, install the washer (18) and o-ring
(17) on the shaft bolt (16).
4. Assemble the fluid side plate (15), the diaphragm
(20), the backup diaphragm (305), the air side dia-
phragm plate (14), and the washer (18) on the bolt
exactly as shown in F
IG
. 6.
5. Apply medium-strength (blue) Loctite or equivalent
to the bolt (16) threads. Assemble into shaft. Torque
the bolt to 110 -120 ft-lb (149-163 N•m) at 100 rpm
maximum.
6. Grease the shaft u-cups (101*) and the length and
ends of the diaphragm shaft (108*). Slide the shaft
into the housing.
7. Repeat Steps 3 and 4 for the other diaphragm
assembly.
8. Apply medium-strength (blue) Loctite or equivalent
to the bolt (16) threads. Screw the bolt into the shaft
hand tight.
9. To keep the diaphragms properly aligned, place 4
bolts on the side that has been torqued. Screw into
the air cover just enough to engage two threads.
NOTE: The fluid cover bolts may work well, or use shop
bolts. Do not use bolts that are long enough to deform
the diaphragm manually.
10. Clamp the torqued side in a vise.
11. Again align the diaphragm and air cover holes on
the second side and place 4 more bolts.
12. Torque the shaft bolt on the second side to 110 -120
ft-lb (149-163 N•m) at 100 rpm maximum.
13. Remove the bolts used for alignment.
14. Reattach one fluid cover (2). Arrow (A) must point
toward the air valve. See Torque Instructions,
page 20.
15. Follow directions under Attach Second Fluid
Cover , page 19.
16. Reassemble the ball check valves and manifolds as
explained on page 12.
F
IG
. 5. Place bolts to keep PTFE diaphragms aligned.
ti18621a