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TM 5-4210-230-14&P-1
CONTROLS
TRAILER EMERGENCY VALVE
(TRACTOR PROTECTION)
With the control in "Released" position, the service
and emergency braking functions of the tractor and trailer are
normal in all respects.
Should a condition resulting in severe air loss from
the tractor or trailer system be detected, or if for any other
reason it is desirable, in the operator's opinion, to cause an
emergency application of the trailer brakes, and to close off
both the service and emergency brake lines on the tractor, the
operator can move the control to the "Emergency" position. If
the control is not moved from the "Released" position under
these conditions, the tractor protection valve will automatically
close the air lines leading to the trailer and apply the trailer
brakes.
The operator should also move the control to the
"Emergency" position when connecting or disconnecting the
trailer, or when operating a truck-tractor without a trailer. It is
important that, after connecting to a trailer, the control be
returned to "Released" position to permit charing of the trailer
air system and normal braking control of both tractor and
trailer.
TRAFFIC HAZARD WARNING LIGHT SWITCH
The traffic hazard warning light switch is required to
flash both front and rear directional signals simultaneously,
thus warning traffic of an emergency. The switch is located
on the end of the turn signal control.
With the turn signal lever in center position, pull
switch out to operate signal lights. To turn off, push switch in.
Hazard warning operation is indicated by simultaneous
flashing of both turn signal indicators. Hazard warning
system should be used for emergency only in compliance with
the laws of the state in which the vehicle is operated.
TRAILER BRAKE HAND CONTROL
The trailer brake hand control is used to apply the
trailer brakes without the use of the tractor brakes. On
slippery roads, use the trailer brake control to prevent the
trailer from jackknifing.
IMPORTANT
Do not use the trailer brake hand control for
parking purposes.
Have the air brake system periodically
inspected by your IH Dealer for safety on the
highway.
TRAILER MARKER LIGHT SWITCH
This switch controls the clearance (marker) lights on
the cab and trailer.
TRANSFER CASE CONTROL (4x4)
The transfer case control is used to select the high or
low speed range of the transfer case See Vehicle Operation
section for operating instructions.
TRANSMISSION CONTROLS
(Main and Auxiliary)
These controls are used to select the various gear
ratios or speeds provided within the transmission.
See
Vehicle
Operation
section
for
operating
instructions.
TUNNEL COVER (Engine)
To remove the engine cover (in cab), pull outward on
the cover latches.
TURN INDICATOR CONTROL
To signal for a right turn, push the control away from
you. For a left turn, pull the control toward you. Signal lights
on the front and rear of the truck and in the instrument cluster
"blink" on and off when the turn indicator is operating.
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