TM-9-2320-279-10-1

M977 SERIES, 8x8 HEAVY EXPANDED MOBILITY TACTICAL TRUCKS (HEMTT)

OPERATOR’S MANUAL VOLUME 1 OF 2

DECEMBER 1998

CHANGE 5

TM-9-2320-279-10-1 - Page 244 of 773

TM 9-2320-279-10-1

M977 Through M985 General Operating Procedures (Cont)

2-11. DRIVE VEHICLE (CONT)

(5)

Check that AIR PRESS gage (5) reads 60 to 120 psi (414 to 827 kPa).

Air pressure indicator (6) will light and buzzer will sound until both

needles reach 60 to 75 psi (414 to 517 kPa).

(6)

Check that FUEL gage (7) shows enough fuel to complete mission.

NOTE

WATER TEMP gage may not show reading at engine idle.

(7)

Check that WATER TEMP gage (8) does not read over 230 °F

(110 °C).

(8)

Check that BATTERY gage (9) reads between 24 and 28 volts.

(9)

Check that AMPERES gage (10) shows positive reading.

(10)

Check that air filter restriction indicator (11) shows yellow.

(11)

If air filter restriction indicator (11) shows red, press button (12). If

indicator still shows red and/or VACUUM INCHES H

2

0 window

shows 18 or above, shut off engine and clean air filter elements

(para 3-8).

2-160

Change 5