TM 9-2330-294-14
(2) Remove snap ring and hex nut from release
bolt on semitrailer no. 1 through 200 and/or
a. Cleaning.
retaining ring, two washers and spring from release
(1) Clean all metal parts using dry cleaning
bolt on semitrailer no. 201 and on.
solvent type II (SD-2).
(3) Remove release bolt nut by turning release
(2) Clean diaphragm with mild soap solution.
bolt counterclockwise until nut falls free.
.
b. Inspection.
(4) Release pressure of arbor press until spring
(1) Inspect wedge guide, housing, and non.
tension is unloaded. Release piston, spring and cap
pressure housing tube for wear, pits or grooves.
from arbor press. Remove spring and two washers.
(2) Inspect and replace diaphragm if tom,
(5) Remove back-up ring and preformed
cracked or if rubber at sealing edge has become set or
packing from piston. Discard ring and packing.
distorted.
(6) Remove snap ring and inner washer from
c. Repair.
release bolt inside cap on semi-trailer No. 1 through
(1) Replace all preformed packings, back-up
200 and/or retaining ring, washer, and spring
rings and the rubber washer.
washer from release bolt inside cap on semitrailer
(2) Replace damaged or defective parts.
No. 201 and on.
6-28. Assembly
(7) Pull release bolt from cap. Remove O ring
Assemble fail-safe unit in the reverse order of
and outer washer from bolt on semitrailer No, 1
disassembly.
through 200 and /or remove two preformed packings
and washer from bolt on semitrailer No. 201 and on.
Discard O ring and packings.
(8) For cap assemblies used on semitrailer No. 1
a. Disassembly.
through 200, remove plug from cap, then remove two
CAUTION
screws and lockwashers securing breather cap.
The compression spring must be held in
Remove breather cap and filter. For cap assemblies
compressed position for disassembly.
used on semitrailer No. 201 and on remove four
Exercise extreme care to ensure cap
screws securing filter retainers. Remove filter
assembly is secure, and will remain so, in
retainers and filters. Discard filters.
arbor press during disassembly.
(1) Secure cap assembly in arbor press so
compression spring is maintained in the compressed
position, and assess to release bolt is provided.
