20
4) Replacement of O rings
(It is recommended to replace at the same time when replacing diaphragms.)
DA-41D(K), 81S (K) common procedure
Photo 19 Photo 20
(1) Remove valve retainer from the pump head. (Photo 14)
Procedure is the same as (1) to (2) of 2) replacement of valves.
(2) Remove the valve plate from the pump head. (Photo 15)
Procedure is the same as (3) of 2) replacement of valves.
(3) Remove the O ring (S-28).
(Photo 19)
(4) Disassemble the horse nipple (Spanish yellow), and remove the O ring (S-4). (Photo 19 upper
right drawing)
(5) Disassemble inlet / exhaust pipe from valve retainer and remove O ring (P-10A)
● 3 pcs. each O rings (S -28) (6 pcs. per set) are
mounted on the single step pump head.
CAUTION
CAUTION
●
Although Inlet / exhaust pipe are different for DA-41D
(K) and DA-81S (K), O rings used (P-10A) are same.
(Photo 20)
● O rings can be removed by hands. In case a tool is
used, pay attention not to produce scar on each
metal parts.
O ring
(S-28)
O ring (P-10A)
Model-based inlet
/
exhaust
pipe
Horse nipple
(small, gold)
