TB-9-2300-378-14
M48 & M60 SERIES VEHICLES
TECHNICAL BULLETIN; AIR INDUCTION SYSTEM MAINTENANCE
SEPTEMBER 1985
TB-9-2300-378-14 - Page 18 of 296
TB 9-2300-378-14
2-4. Air Cleaner Filter Clog Indicator
a. General.
The air cleaner filter clog indicator provides a visual means of determining when the air
cleaner filter element must be serviced without actually opening the air cleaner box and
inspecting the filter element.
Two models of indicators are presently being used (fig. 2-
2).
b. Checking. To determine if air filter element needs servicing.
2-5.
a.
b.
Check indication on air restriction indicator.
Early Model - If red disk is visible, notify organizational maintenance.
Late Model-If reading is more than 25, notify organizational maintenance.
Engine Air Intake (Fig. 2-3).
General.
During normal and water fording operations, the engine air intakes (view A) must be
positioned to draw air from the crew compartment.
During extreme cold or an NBC
attack alert, the engine air intakes must be reversed to draw air from the engine
compartment (para b below)
Reversal Procedure.
(1) Remove
(2) Remove
(3) Remove
(4) Remove
four screws and washers and cover (view A). A gasket is cemented to cover.
six nuts and washers (view B).
eight nuts and washers.
intake from bulkhead.
(5) If gaskets and/or intake are damaged, notify organizational maintenance.
(6) Position intake on flange studs with screen toward engine compartment.
(View C).
(7) Install six nuts and washers on studs. (View C).
(8) Install eight nuts and washers on studs. (View D).
(9) Position cover on intake and install four screws and washers.
2-8
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