FF-MM-326-REV -01
Page 9
Operation and Maintenance Guide SDP 25 Metal Series
d. Now with the help of two spanner hold one of
the across flat of one outer flange (5) and ro-
tate the second outer flange (5) to disassemble
it from the shaft (15). Remove the diaphragm
(12), inner flange (6) & washer (10). Now
pull out the shaft (15) out of the shaft housing
assembly (A).
*For ALT/SST series hold one of the across flat
of hex bolt (9) and rotate the other side hex
bolt (9) to disassemble it from the shaft (15)
Remove the outer flange (5), Backup dia-
phragm (12) PTFE Diaphragm (12A), inner
flange (6) & washer (10). Now pull out the
shaft (15) out of the shaft housing assembly
(A).
e. For other side Diaphragm removal, Now hold
the shaft (15) in a vice with proper packing.
Care must be taken not to damage the shaft
(15) outer surface. Now remove the outer
flange (5) with spanner to disassemble it from
shaft (15) & remove parts same as above.
*For ALT/SST hold the shaft (15) in a vice
with proper packing. Care must be taken not
to damage the shaft outer surface. Now remove
the Hex bolt (9) with spanner to disassemble it
from shaft (15) & remove parts same as above.
f. Now replace the diaphragms (12). Ensure that
diaphragm orientation is correct, i.e. For ALB/
ALN/ALV. The sticker side of the diaphragm
(12) to be located on outer flanges (5). Now
assemble the inner flange (6), washer (10) &
shaft (15) in reverse manner and remove the
half shaft assembly from vice.
* Refer image for ALT & SST model, Hold the
shaft (15) in vice, then install inner flange (5),
new Backup diaphragm (12) & PTFE Dia-
phragm (12A) & outer flange (5) in reverse
manner and remove the half shaft assembly
from vice.
* For ALS/ ALH model AIR SIDE marking to
be located toward the shaft housing (A).
g. Lubricate the edge of the shaft (15) with
specified lubricant. Slowly insert the shaft with
rotating motion. (Refer Image of step “c”)
h. Once the half shaft open portion comes out
of the bush, follow the procedure in reverse
manner as described in step (c),(b) & (a) and
assemble the pump.(Refer Image of steps “c, b
& a”)
2. Replacement Of Shaft O-Rings
a. For removing the rubber rings from bush, first
follow the steps a, b c & d from the diaphragm
replacement.
b. Now remove the seals (14) with the help of
needle Nose pliers. Care should be taken not
to damage the inner face of bush.
c. Once all the old seals are have been removed,
the inside of the bushing should be cleaned
to ensure no debris is left that may damage to
new seals (Pressurized air is preferable).
d. These following tools can be used to aid in the
installation of new seals:
• Needle Nose pliers
• Phillips Screwdriver
• Electrical Tape