TM 9-2330-398-10
2-12. COUPLING SEMITRAILER TO PRIME MOVER (continued).
CAUTION
Proper operation of semitrailer primary brake system is essential for safe operation
of vehicle. Functional system check is necessary before putting trailer into
service. Semitrailer parking brakes are provided to maintain braking and holding
requirements whether semitrailer is fully loaded or empty. The system will
automatically apply parking brakes when air pressure in primary reservoir falls
below specified pressure. Proper operation of this system must be maintained.
6.
Close drain valves (7) on front and rear reservoir tanks (8 and 9).
NOTE
Some prime movers are not equipped with shut-off valves.
7.
Open shut-off valves on air lines of prime mover
8.
Plug intervehicular cable (10) into receptacle (11) on semitrailer.
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