Cashco DA1 - Manual (Page 8)

IOM-DA1 8
4. Position piston-guide bearing (13)
over and into upper end of cage
(19) until the cap seal (27.1) edge
touches the upper lip of the cage
(19). While gently applying force to
press the piston-guide bushing (13)
into the cage (19), simultaneously use
fi ngers to lightly press the cap seal
(27.1) inwards into the groove of the
pis ton-guide bearing (13) until the cap
seal (27.1) “slips into” the cage (19).
DO NOT USE TOOLS, LUBRICANT,
OR HEAVY FORCE TO EN GAGE
THE CAP SEAL (27.1) INTO THE
CAGE (19). Do not press in wards
on the Cap Seal (27.1) too much or
the cap seal (27.1) may slide out of
its groove or the cap seal (27.1) can
be damaged.
c. Type CW:
1. Stretch o-ring energizer/seal (27.2)
over low er cir cum fer ence of piston-
guide bear ing (13), tak ing care not
to “cut” o-ring energizer/seal (27.4).
Using thumbs, work the o-ring en-
ergizer/seal (27.4) up and into the
groove of the piston-guide bear ing
(13). NOTE: A very slight amount
of fl uid and elas tomer compatible
lubricant is rec om mend ed as an
installation aid.
2. Place wiper washer (17.1) into “cup” of
Wiper Seal (16). Holding these parts
(17.1 & 16) between thumb and fore-
fi nger, in sert into cage (19) at an ap-
proximate 45° angled approach with
wiper washer (17.1) on bottom, wiper
seal (16) on top with turned-down lip
of wiper seal (16) en ter ing cage (19)
fi rst. Rotate wiper seal (16) and wiper
washer (17.1) to a level po si tion ap-
proximately half way down into cage
(19). Allow wiper washer (17.1) to rest
on bottom of cage (19).
3. Position TFE cap seal (27.1) ring with
rectangular cross-section at end of
pis ton-guide bearing (13). Stretch cap
seal (27.1) over lower end of piston-
guide bear ing (13) using thumbs to
work the cap seal (27.1) onto the pis-
ton-guide bearing (13). DO NOT USE
A TOOL FOR THIS STEP. Continue
pressing cap seal (27.1) up wards
towards the groove until the cap seal
(27.1) “snaps” into the groove of the
piston-guide bearing (13).
4. Position piston-guide bearing (13)
over and into upper end of cage (19)
until the cap seal (27.1) edge touches
the upper lip of the cage (19). While
gently applying force to press the
piston-guide bushing (13) into the
cage (19), simultaneously use fi ngers
to lightly press the cap seal (27.1)
inwards into the groove of the pis ton-
guide bearing (13) until the cap seal
(27.1) “slips into” the cage (19). DO
NOT USE TOOLS, LUBRICANT, OR
HEAVY FORCE TO EN GAGE THE
CAP SEAL (27.1) INTO THE CAGE
(19). Do not press in wards on the Cap
Seal (27.1) too much or the cap seal
(27.1) may slide out of its groove or the
cap seal (27.1) can be damaged.
d. Type PR:
1. Stretch corrogated metal piston ring
en er giz er (27.6) over lower circumfer-
ence of piston-guide bearing (13).
Using thumbs work the en er giz er
(27.6) into the piston-guide bear ing
(13) groove.
2. Spread a piston ring seal (27.5) and
slide over lower circumference of
piston-guide bearing (13), taking care
not to “cut” piston ring seal (27.5).
Using thumbs, work the piston ring
seal (27.5) into the groove of the
piston-guide bearing (13). Repeat
this procedure with a second piston
ring seal (27.5). NOTE: A piston ring
assembly (PRA) consists of one met al
corrogated energizer (27.6) and two
piston ring seals (27.5). Also, the 6"
body size includes three sets of PRA's
in the sets of grooves; all other body
sizes have only one set of PRA.
3. Position piston-guide bearing (13)
over and into upper end of cage (19)
until the lower piston ring seal (27.5)
touches the upper lip of the cage (19).
While gently applying force to press
the piston-guide bearing (13) into the
cage (19), si mul ta neous ly use fi n-
gers to lightly circumferentially press
the fi rst (lower) piston ring seal (27.5)
inwards into the piston-guide bearing
(13) groove until the fi rst piston ring
seal (27.5) “slips into” the cage (19).
Repeat for the second piston ring seal
(27.5).