User's Manual

Service
3A1973B 19
NOTE: When you install the clamps in Step 5, orient the
center housing so the air inlet is approximately 45°
above horizontal and the muffler is approximately hori-
zontal.
5. Position the fluid covers (1) and the center housing
so the arrows (A) on the covers face the same direc-
tion. See F
IG. 8. Apply appropriate, waterproof sani-
tary lubricant and install the clamps around the fluid
and air covers. Install the grounding strip on the
clamps, and torque the t-handle nuts to 80-90 in-lb
(9-10 N•m).
6. Reassemble the ball check valves and manifolds as
explained on page 14.
Air Center Service
Remove air covers for easier replacement of u-cups and
to replace the poppet o-ring, if needed. See parts illus-
tration, page 20.
1. Follow all disassembly directions for diaphragm ser-
vice. See Standard Diaphragms, page 16, or
Overmolded PTFE Diaphragms, page 18.
2. Remove the muffler (103).
3. Use a phillip’s screwdriver to remove 6 screws (22),
and remove one air cover (21) and gasket (112).
4. Remove u-cup (102) and poppet o-ring (101).
5. Lubricate and install new u-cup (102) and poppet
o-ring (101). U-cup lips must face out of center
housing.
6. Reinstall the gasket (112) and air cover (21). Torque
screws (22) to 35-45 in-lb (4-5 N•m).
7. Repeat for other side.
8. Reinstall the muffler (103).
9. Follow all reassembly directions for diaphragm ser-
vice. See page 17 for standard diaphragms or page
18 for overmolded diaphragms.