7. Check out the gas particulate filter unit. Refer to TM 5-5420-202-10. After the unit has
been checked out, test the unit as follows:
a. Slide the spring clip clear of the air inlet openings on the precleaned-particulate filter
assembly and switch on the gas particulate switch on the master control panel. Check
to see that air issues from filter unit by placing a hand over the filter unit hose.
Under arctic winter conditions, there is danger of frostbite
due to the inhalation of extremely cold air.
connect air duct hose to M25A1 protective mask unless
ambient temperature is well above freezing.
b. Connect the M25A1 protective mask to filter unit hose and make sure a sufficient volume of
air reaches each face piece. Have a crew member put on and adjust his M25A1 protective
mask. Resistance to breathing should not be noticeable.
Check all hull bulkheads and engine electrical connectors, jacks, and plugs for routing,
installation, and firm seating.
F u e l the vehicle. Refer to TM 5-5420-202-10. While fueling, check for leaks at filter
connections, fuel tank drain plugs, fuel line quick disconnects, fuel valve, and filters.
Correct any leaks found.
Check oil level in engine and transmission in accordance with LO 5-5420-202-12. Check
processing tag DD Form 1397 for grade of engine oil installed in the vehicle. Change the
engine oil only if a different type or grade is required.
Service engine air cleaner filters. Refer to TM 5-5420-202-20.
12. Check operation of all controls. Refer to TM 5-5420-202-10.