TM 5-3805-280-24-1
Operational Checkout Procedure
AIR CLEANER
A--Air Cleaner Unloader Valve
YES: Go to next check.
UNLOADER VALVE
CHECK
Open left front access door.
NO: Replace unloader
valve.
Inspect air cleaner unloader valve (A).
9005
Is unloader valve slightly open when the engine is not
10
running?
34
Is rubber flexible and showing no sign of becoming hard
or brittle?
Engine running.
Turn auto-idle switch off and turn engine rpm dial to fast
idle.
Does unloader valve close?
T7531BF
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AIR CLEANER
A--Secondary Element
YES: Go to next check.
ELEMENTS CHECK
B--Primary Element
NO: Clean or replace
Remove air cleaner cover.
primary element. Replace
secondary element if
Inspect primary element (B).
primary element is
damaged. Do not clean
secondary element.
Is element clean and in good condition?
Replace if dirty.
T7531BG
UN07JUN91
Remove wing nut to remove primary element.
Inspect secondary element (A).
Is element clean and in good condition?
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