TM-9-2330-356-14

SEMITRAILER, TANK: 5000 GALLON, BULK HAUL, SELF LOAD/UNLOAD M967 AND M967A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, AUTOMOTIVE M969 AND M969A1; SEMITRAILER, TANK: 5000 GALLON, FUEL DISPENSING, UNDER/OVERWING AIRCRAFT M970 AND M970A1

TECHNICAL MANUAL; OPERATOR’S, UNIT, DIRECT SUPPORT, AND GENERAL SUPPORT MAINTENANCE MANUAL

OCTOBER 1990
TM-9-2330-356-14

  TM-9-2330-356-14 - Page 227 of 528

fail-safe unit to aline with brake lines. Tighten clamp
screw to 20-25 lb.-ft. Do not overtighten.
(8)
(9)
Reconnect air hoses to brake chamber.
Manually release spring in fail-safe unit.
Figure 4-72. Removing Brake Chamber (M967, M969, and
M970 except M970 SN TC-0843, TC-0844, and
TC-103thruTC-178).
c.
Repair of Fail-Safe Unit.
WARNING
Do not attempt to repair brake chamber
fail-safe unit. It is dangerous because of high
spring compression. No repair Is authorized
for fail-safe unit.
d.
Removal of Brake Chamber.
(1) Cage the spring in the air chamber unit (para 2-4).
(2)
Release air pressure by opening drain valves on
both air reservoirs (fig. 4-79).
(3) Tag and disconnect air lines from brake chamber
and air chamber unit.
TM 9-2330-356-14
(4) Remove rear clamping
band (fig. 4-73) seeming air
chamber unit to brake chamber and remove air chamber unit.
(5) Use a drift and hammer to loosen collet nut
(fig. 4-70).
(6) Remove broke chamber and air chamber unit by
unscrewing the assembly from the plunger housing.
(7) At this time, the wedge assembly can be removed
for inspection or replacement (para 4-35).
e.
Repair.
Refer repair of broke chamber to direct support
maintenance.
f.
Installation of Brake Chamber and Air Chamber Unit.
(1) Clean and install wedge assembly (if removed) into
plunger housing (para 4-35). Check position of wedge in plunger
housing to make certain wedge assembly is properly seated
(2)
Make sure the spring in the air chamber unit is caged.
(3) Thread collet nut onto housing tube. Apply anon-
hardening seater (item 25, Appendix E) to the first three threads
of housing tube.
(4)
With collet nut loose, turn the brake chamber into
plunger housing until it bottoms.
(5) Replace the air chamber unit on the brake chamber.
Clamp in place with clamp ring, using a nut and capscrew to
secure clamp.
(6) Aline connection ports with brake lines, if necessary,
by unscrewing brake chamber not more than one full turn.
Figure 4-73. Brake Chamber and Air Chamber Unit (M967,
M969, and M970 except M970 SN TC-0843, TC-0844, and
TC-103 thru TC-178).
Change 3
4-91


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