TM-9-2320-431-10-1
TRUCK, WRECKER, 8X8, M984A1
TECHNICAL MANUAL; OPERATOR'S MANUAL; PART 1 OF 2
JUNE 2009
TM-9-2320-431-10-1 - Page 1224 of 1244
PERFORM PROCEDURE - Continued
WARNING
When green pointer of AIR PRESS gauge is at zero, braking capability
is greatly reduced. Extra care must be used to avoid collision. Failure to
comply may result in injury or death to personnel.
NOTE
If both red needle and green needle on AIR PRESS gauge read zero,
skip to Step (4).
3.
If green needle on AIR PRESS gauge (2) is at zero and red needle shows normal air
pressure of 100 to 120 psi (690 to 827 kPa), complete the following:
a.
Continue operation of vehicle. Brakes on third and fourth axles and trailer will
work even if air pressure from No. 3 air tank has been lost.
b.
Leave additional distance between vehicles.
c.
Apply service brake pedal (3) earlier than usual when slowing vehicle.
d.
Downshift as necessary, when slowing vehicle.
WARNING
Do not use engine brake when vehicle is on slippery surface. If
engine brake is used incorrectly, vehicle may skid out of control.
Failure to comply may result in injury or death to personnel.
e.
If necessary to slow vehicle, set Jacobs engine brake HIGH/LOW switch (6) to
LOW and set ON/OFF switch (7) to ON.
f.
Notify field level maintenance as soon as possible.
4.
If both red needle and green needle on AIR PRESS gauge (2) read zero, complete
the following:
a.
Downshift as needed to control vehicle speed until place is found to stop.
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