TM-9-2320-273-10
TRUCK, TRACTOR, LINE HAUL; LIGHT EQUIPMENT TRANSPORTER; TRUCK CHASSIS; MEDIUM EQUIPMENT TRANSPORTER
TECHNICAL MANUAL; OPERATOR’S MANUAL
DECEMBER 2012
TM-9-2320-273-10 - Page 127 of 452
Table 21. Transmission Air Control M915 through M920, Fan Clutch Actuator
Override M919, PTO Control M916 and M920, and Pusher Axle Controls M917,
M919, and M920 - Continued.
Key
Control/Indicator
Function
3.
Pusher Axle Control
(M917, M919, and
M920)
Use this control panel to lower and raise the pusher axle
and to pressurize the system to adjust the amount of
weight carried by the pusher axle.
TO LOWER PUSHER AXLE:
Rotate the control pressure knob counterclockwise to
remove pressure from the pusher axle. Pressure gauge
should indicate 0 psi. Place the pusher axle raise/lower
control in the axle down position.
TO ADJUST LOAD ON THE PUSHER AXLE:
Rotate the control pressure knob clockwise (toward +)
until the air pressure gauge indicates the proper
pressure setting for the desired load. Tighten the
setscrew to lock the control pressure knob at the
pressure selected. With setscrew tightened at a
particular setting, the control pressure knob can be
closed (toward -) and reset to the previous setting.
CAUTION
Do not rotate the control knob counterclockwise to
raise axle. This causes the air to exhaust and allows
the bag to fold unevenly which can result in damage
to air bags.
TO RAISE THE PUSHER AXLE:
Set the axle raise/lower control at the AXLE LIFT
position.
4.
Transmission Air
Control
NOTE
The transmission will neutralize if the vehicle
auxiliary air supply drops below 60 psi.
The auxiliary air supply does not register at the
vehicles main air gauges. The auxiliary air supply
will provide approximately 14 to 18 transmission
shifts after loss of vehicle main air supply.
Push in on valve to provide the transmission with
operating air from vehicle supply. When the vehicle air
supply is 80 psi or greater, the charging valve will stay
in when released. Pull out on the charging valve to
remove air supply. The transmission will neutralize
automatically.
TM 9-2320-273-10
0005
0005-29
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