PREVENTIVE MAINTENANCE CHECKS AND SERVICES Continued
ITEM TO BE
a. Raise spring clip up to uncover air inlet
openings on the precleaner and particulate filter
assembly. Turn NBC air filter switch on
instrument panel to ON. Pull filtered air hose
down from orifice connector assembly and
check for air flow from each hose outlet. Check
protective mask and microphone operation.
b. Make sure spring clips are serviceable and
present. Spring clips should be installed on the
gas particulate filter unit (GPFU) when the
GPFU is not in operation. Proper spring clip
installation prevents water from damaging the
filters and blower motors.