Always wear goggles, rubber gloves, and rubber apron when handling
batteries. Battery acid is harmful to skin and will ruin clothing.
7. Remove six vehicle batteries and electrolye from wooden equipment boxes. Fill batteries with electrolyte and
check specific gravity. (Refer to TM 9-6140-200-14). Install batteries in vehicle and connect cables. Refer to TM
8. Check out the gas particulate filter unit. Refer to TM 9-2350-222-10. After the unit has been checked out, test the
unit as follows:
a. Pull and lift spring clip from air intake opening on filter unit. Set GAS PARTICULATE switch on master
control panel to ON. Set MASTER BATTERY switch ON. Disconnect air duct hose from stowage connector
and place hand over opening in hose to check for air flow.
b. Turn the filter unit heater air control knob clockwise and check to see that the indicator light operates.
Under Arctic winter conditions, there is danger of frostbite due to the
inhalation of extremely cold air. Do not connect air duct hose to M25A1
protective mask until heater produces warm air. As long as 20 minutes may
be required for some models to produce heat.
c. Connect breakaway socket coupling of air duct hose to canister coupling on the M25A1 protective mask and
make sure a sufficient volume of air reaches each face piece. Adjust the heat control knob to obtain a
comfortable air temperature. Have a crewmember don and adjust his M25A1 protective mask. Resistance
to breathing should not be noticeable. If the precleaner and particulate filter assembly has an adjustable iris
valve, turn the valve clockwise to decrease and counterclockwise to increase flow.
9. Check all hull bulkhead, under turret, and engine electrical connectors, jacks, and plugs for routing, installation,
and firm seating.
Change 5 2-10