Reassemble
Reassemble
Reassemble the
the
the Standard
Standard
Standard Diaphragms
Diaphragms
Diaphragms
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:
TIP:
TIP: If you are also repairing or servicing the
center section (drive shaft, piston, etc.), see
Center Section Repair, page 18
, before you put the
diaphragms back on.
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.
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 100 ft-lb (135 N•m).
7.
Rotate the drive shaft to move the piston fully
to one side. See instructions in step 4 of
Disassemble the Standard Diaphragms, page 14
.
8.
Repeat to install the other diaphragm assembly.
9.
Attach the fluid covers. The arrow on each fluid
cover must point toward the outlet manifold.
10. Reassemble the check valves and manifolds.
See
Reassemble the Ball Check Valve, page 11
.
11. Restore motor cooling fan cover and pin (131) to
their original locations.
1
Rounded side faces diaphragm.
2–Piece
2–Piece
2–Piece (((
PT
PT
PT
or
or
or
SP
SP
SP
))) Models
Models
Models
2
Apply medium-strength (blue) thread
locker to the threads.
3
AIR SIDE markings on diaphragm must
face the center housing.
4
If the screw comes loose or is replaced,
apply permanent (red) thread locker
to diaphragm side threads. Apply
medium-strength (blue) thread locker to
shaft side threads.
5
Torque to 100 ft-lb (135 N•m) at 100
rpm maximum.
6
Apply primer to the female threads.
Allow to dry.
3A5133J
15
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