Service
310622ZAL
27
Reassembly
1.
Install the shaft u-cup packings (110*) so the lips
face out of the housing (101). Lubricate the pack-
ings. See F
2.
Apply high-strength (red) Loctite
® or equivalent to
attach the bolt (446a) to the diaphragm (446), if needed.
Assemble the air side plate (445) onto the dia-
phragm (446). The wide, radiused side of the plate
must face the diaphragm. Apply medium-strength
(blue) Loctite
®
or equivalent to the threads of the
diaphragm assembly. Screw the assembly into the
shaft (121) hand tight.
3.
Grease the length and ends of the diaphragm shaft
(121). Insert the shaft/diaphragm assembly into one
side of the pump.
NOTE: Turn the pump 90° on the stand for easier fluid
cover clamping.
Align the fluid cover (234) and the center housing.
Securely tighten the clamp (135).
4.
Assemble the other diaphragm assembly to the
shaft as explained in step 2. This diaphragm will be
lifted off the air cover at this point.
5.
Supply the pump with low pressure air (less than 7
psi [.05 MPa, 0.5 bar]). The diaphragm will very
slowly pull onto the air cover (120). Find the pres-
sure that keeps the diaphragm close enough to
clamp, but does not let it contact the pilot pin.
6.
Assemble the fluid cover (234) and clamp (135) so
the cover is aligned to the center housing. Tilt pump
for easier assembly. Securely tighten the clamp.
NOTE: If the diaphragm contacts the pilot pin and is
forced away from the air cover, try Step 5 again. If nec-
essary, return to Step 3.
7.
Reassemble the ball check valves and manifolds as
explained on page 21.
To reduce the risk of serious injury, including
amputation, do not put your fingers or hand between
the air cover and the diaphragm.
NOTICE
Do not deform the diaphragm manually. The dia-
phragm needs uniform pressure to deform properly.
F
IG
. 22
Apply a medium-strength thread locker to
the shaft side of the screw.
2
446
445
121
101
135
234
TI17273a
Apply a high-strength thread locker to attach
the screw to the diaphragm, if needed.
1
2
446a
1
3A Pump Shown
Summary of Contents for SaniForce 1590 3A
Page 5: ...Models 310622ZAL 5...
