Table 2-1. Preventive Maintenance Checks and
Services (PMCS) for M915A4 (Con't).
Not Fully Mission
DO NOT remove radiator cap unless engine is
cold. Remove cap in two steps. First, place
thick cloth over cap and slowly turn cap left to
first stop. Pause and allow pressure to escape.
Turn cap further left until it can be removed.
This is a pressurized cooling system and
escaping steam, hot water or coolant will cause
Remove radiator cap (52)
and check coolant level in
radiator (53). Coolant
must be within 2 1/2 in.
(6.4 cm) below filler neck.
Add coolant as required
Vehicle operation with inoperative horn may
violate AR 385-55.
permits, check operation
of electrical and air horns.
Vehicle operation with damaged or inoperative
headlights or stoplights may violate AR 385-55.