TM 3-4240-284-20&P
2-14. M56 GAS-PARTICULATE FILTER UNIT - MAINTENANCE INSTRUCTIONS (CONT).
ACTION
ITEM
LOCATION
INSTALLATION
Place gas filter (12) in filter housing (8), either end first.
Gas filter
M56 Gas-Particulate Filter
Unit
Position access cover (6) on filter housing, aline guide
pin with guide hole (15). Push access cover (6)
into place.
I
I
NOTE
To prevent binding of outer access cover
against filter housing rim, screws must be
tightened alternately, in a criss-
cross pattern.
Install washers (11), aluminum washers (10), and
screws (9) finger tight.
WARNING
Filter seals must be properly seated to
prevent bypass of contaminated air.
CAUTION
Be sure to observe torque values for the
torque wrench being used.
Preliminary torque. In a crisscross pattern, torque
screws to 8-10 foot-pounds (100-125 inch-pounds).
Final torque. In a crisscross pattern, torque screws to
Particulate filter
15-16 foot-pounds (180-200 inch-pounds).
Place particulate filter (7) in gas filter (16), either end
first.
Grasp inner cover by the handles and place it in the
access cover (6).
Swing retaining bar (4) up across inner cover and
engage end of bar with catch (3).
WARNING
Filter seals must be properly seated to
prevent bypass of contaminated air.
Tighten screw (2) until sleeve (17) is flush with top
surface (A) of retaining bar (4).
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