VERDER VERDERAIR VA-EH50 Repair Parts page 19

Reassemble Reassemble the Reassemble the Overmolded the Overmolded Diaphragms Overmolded
NOTICE NOTICE NOTICE
After reassembly, allow the thread locker to cure
for 12 hours, or per manufacturer's instructions,
prior to operating the pump. Damage to the pump
will occur if the diaphragm shaft bolt loosens.
TIP: If you are also repairing or servicing the
TIP: TIP:
center section (drive shaft, piston, etc.), follow
Center Section Repair, page
diaphragms.
1. Clean all parts and inspect for wear or damage.
Replace parts as needed. Be sure the center
section is clean and dry.
2. Thoroughly clean or replace the diaphragm bolt
(13). Install the o-ring (34).
3. Assemble the fluid side plate (9), the diaphragm
(11), the backup diaphragm (12, if present), and
the air side diaphragm plate (10) on the bolt
exactly as shown.
Rounded side faces diaphragm.
1
Apply medium-strength (blue) thread
locker to the threads.
Apply primer to the female threads.
Allow to dry.
859.0773
Diaphragms Diaphragms
20, before replacing
4. Clean the female threads of the piston shaft
with a wire brush dipped in solvent to remove
any residual thread locker. Apply thread-locking
primer and allow it to dry.
5. Apply medium-strength (blue) thread locker to
the threads of the bolt.
6. Hold a 28 mm wrench on the wrench flats of the
piston shaft. Screw the bolt onto the shaft and
torque to 135 N•m (100 ft-lb).
7. Rotate the drive shaft to move the piston fully
to one side. See instructions in step 4 of
Disassemble the Overmolded Diaphragms, page
18.
8. Repeat to install the other diaphragm assembly.
9. Attach the fluid covers.
10. Reassemble the check valves and manifolds.
See Reassemble the Check Valve, page
11. Restore motor cooling fan cover and pin (131) to
their original locations.
1–Piece ( ( ( EO) ) ) Model
1–Piece 1–Piece EO EO
Repair
13.
Model
Model
19