Bettis P/N 127073E
Revision “A”
Page 16 of 37
3.3.3
Refer to assembly drawing page 2 of 2 Detail "C". Install one rod wiper (4-10) into inner
end cap (3-10).
3.3.4
Install one rod bushing (4-20) into inner end cap (3-10).
3.3.5
Coat one Polypak seal (4-30) with lubricant and install, lip first, into inner end cap (3-10).
CAUTION:
Install the Polypak seal with energizer ring facing outboard side (away from
housing).
3.3.6
Install one o-ring seal (4-90) into seal groove located on the inboard face of inner end cap
(3-10).
3.3.7
Install inner end cap (3-10) on to housing (1-10). NOTE: The pressure inlet port should
be positioned in the same position as recorded in section 2.2 step 2.2.1.
3.3.8
Place lockwashers (3-110) onto hex cap screws (3-100).
3.3.9
Install hex cap screws (3-100), with lockwashers, through housing (1-10) and into inner
end cap (3-10).
3.3.10 Refer to assembly drawing page 2 of 2 Detail "D". Install one o-ring seal (4-70) into the
seal groove in piston rod (3-40).
3.3.11 Apply lubricant to two sets of rod T-seal components (4-50).
NOTE: The T-seal is composed of one rubber seal and two split skive-cut back-up rings.
3.3.11.1
Install two sets of rod T-seals (4-50) into the internal diameter seal
grooves of piston (3-30).
3.3.11.2
Install a back-up ring on each side of the T-seal.
3.3.11.3
When installing the back-up rings, do not align the skive-cuts.
3.3.11.4
If the back-up rings are too long and the rings overlap beyond the
skive-cuts, then the rings must be trimmed with a razor sharp instrument.
3.3.12 Install two split ring halves (3-50) into the inner most groove in piston rod (3-40) and retain
by installing the recessed area of piston (3-30) onto the piston rod and over the two split
ring halves (3-50).
3.3.13 Install two split ring halves (3-50) into the piston rod, in front of the piston installed in the
previous step, and retain with retainer ring (3-60).
3.3.14 Install one o-ring seal (4-40) onto the outer diameter seal groove of inner end cap (3-10).
3.3.15 Coat one D-ring seal (4-60) with lubricant and install into the piston external seal groove.
NOTE: The flat side of the D-ring seal go down into the seal groove.
