4-2 Change 11
Organizational Preventive Maintenance
Checks and Services Quarterly Schedule
Inspect for improper closing, cracked or broken hinges, and
defective brace or handle. Replace a defective lid. Inspect the
lid hinge retainer and replace if necessary (para 4-8.1).
Check for breaks, binding, and loose or missing rivets.
Replace a defective lifting handle (para 4-8.2).
Inspect all accessory items for serviceability; repair or replace any
Top and Bottom Shields
Inspect for cracks, bends, and missing, or distorted springs.
Repair or replace a damaged part (para 4-9.1).
Inspect for dents and broken, loose or missing fittings.
Check for leaks. Replace a defective spare generator (para
Air Valve Assembly
Inspect for leaks and improper operation while pressurizing
the unit. If valve leaks, shut unit down and replace air valve assembly
Inspect for leaks from drain plug. If defective, replace.
Check fuel tank for cracks, broken welds, damaged threads
and other leaks. Replace a damaged fuel tank (para 4-9.6).
Check fuel filler cap for cracks, damaged threads, defective
gasket, and leaks. Replace a defective cap or gasket.
Inspect preheater valve for leaks and improper operation. If
valve leaks, shut down unit. Check for leaks between valve
stem and packing nut. Tighten packing nut or repack valve
as required. Replace a defective valve. Inspect the preheater
head and shield for bends and breaks. Check the head for
loose mounting. Inspect the orifice cleaning control for binding or
improper operation. Inspect the preheater head
bushing for damaged threads. Replace or repair the
preheater (para 4-9.4).