１８
5)
Replacing O-rings
It is recommended that O-rings be replaced at the same time as replacing diaphragms.
Use tools 1, 2, 3, 4, 5, 6, 7 and 8.
(1)
Remove pump panels 1 and 2, piping , pump heads and valve retainers. The
procedure is the same as steps (1)-(3) of 3) Replacing DAL-181D Unit Valves.
(2)
Remove the O-rings (P-18) by first removing the long hose nipples (L-1), (L-2), (S)
and G 1/2 plug with a spanner.
(3)
Evenly cover the entire surface of the new O-rings (P-18) with a light coating of
vacuum grease. Fit them to the long hose nipples (L-1), (L-2), (S) and the G 1/2
plug. (Photo 25.)
(4)
Use solvent to remove any vacuum grease on the fastener parts. Fix the long hose
nipples (L-1), (L-2), (S) and the G 1/2 plug with a spanner.
Note: Do not over tighten. Over tightening can damage the O-rings.
(5)
Remove the Pump Head’s O-rings (P-48) and use solvent to clean the O-ring
grooves and valve retainers. (Photo 26.)
(6)
Cover the new O-ring (P-48) all over with an even light coating of vacuum grease.
Fit it into the O-ring groove.
(7)
Fit and fix in place, the valve retainers, pump heads, piping and panels 1 and 2.
For 181D, this procedure is the same as steps (7)-(8) of 3) Replacing DAL-181D
Unit Valves. For 361S, this procedure is the same as steps (3)-(4) of 4) Replacing
DAL-361S Unit Valves.
O-ring
(P-48)
Photo 26
Long hose nipple (L-2)
Long hose nipple (S)
G 1/2 plug
O-ring
P-18
Fit O-ring here.
Long hose nipple (L-1)
Photo 25
