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Bettis P/N 124840E
Revision “B”
Page 19 of 46
3.3.8 Place lockwashers (3-110) onto hex cap screws (3-100).
3.3.9 Install and tighten hex cap screws (3-100), with lockwashers, through housing (1-10) and
into inner end cap (3-10).
3.3.11 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).
3.3.12 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.
3.3.12.1 Install two sets of rod T-seals (4-50) into the internal diameter seal
grooves of piston (3-30).
3.3.12.2 Install a back-up ring on each side of the T-seal.
3.3.12.3 When installing the back-up rings, do not align the skive-cuts.
3.3.12.4 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.
3.3.13 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).
3.3.14 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).
3.3.15 Install one o-ring seal (4-40) onto the outer diameter seal groove of inner end cap (3-10).
3.3.16 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.
3.3.17 Coat two tie bars (3-20) with lubricant and install by carefully pushing tie bars through
piston (3-30) and rod T-seal (4-50).
3.3.18 Screw tie bars (3-20) into inner end cap (3-10) and tighten until the threads bottom out.
3.3.19 Refer to assembly drawing page 2 of 2 Detail "E". Coat two o-ring seals (4-80) with
lubricant and install into outer end cap (3-80).
3.3.20 Apply lubricant to one o-ring seal (4-40) and install into the outer diameter o-ring groove of
outer end cap (3-80).
3.3.21 Apply lubricant to the bore of cylinder (3-70).
CAUTION: If needed, when installing the cylinder, hammer on the end of the cylinder
only with a non metallic object.