Repair
3A8476A
23
Air Cylinder Section Assembly
1. Install O-rings (415) then (416) onto the short
bearing seal guide (413) and the long bearing seal
guide (414).
2. Install one needle packing (411) seal into the short
and long bearing seal guides (413 and 414) O-ring
end. Open spring side of needle packing seals need
to face outwards.
3. Press the lower bearing (417) into the O- ring end of
the short and long bearing seal guides (413 and
414).
4. Insert two needle packing (411) seals into each
upper bearing (412).Open spring side of needle
packing seals need to face outwards on either side
of the upper bearing. Insert this assembly into the
threaded end of the bearing seal guides (413 and
NOTE:
. 29 shows a short seal bearing guide (413)
however both long and short guides are assembled the
same.
5. Apply medium strength thread locker to the threads
of the short and long bearing seal guides (413 and
414) and screw into the air cylinder housing (409).
Torque to 15 ft-lb (20.34 N•m) See F
6. Apply a thin coat of lithium grease to the ball shut off
needles (418) and insert through the short and long
bearing seal guides (413 and 414).
7. Install O-rings (407) and guide rings (406) onto
pistons (404).
8. Place pistons (404) onto ball shut off needles (418)
until the needle bottoms out in the piston. Torque
M3 set screws (405) to 8 in-lb (0.9 N•m).
9. Apply a thin coat of lithium grease to the O-rings
(407) and guide rings (406) and insert pistons into
the bores of the air cylinder housing (409) until the
pistons bottom out in the bores of the air piston
housing. See F
10. Install springs (403) and cylinder cover (402). Install
M4 SHCS screws (401) through cylinder cover into
air cylinder housing (409). Tighten down M4 SHCS
screws (401) evenly to compress springs without
binding assembly. Torque M4 screws to 29.2 in-lb
(6.5 N•m). See F
F
IG
. 29
412
411
413
415
416
411
417
F
IG
. 30
F
IG
. 31
409
413
414
406
404
413
407
418
414
418
409
404
405
405
