Before disconnecting a trailer or when operating a
vehicle without a trailer, the trailer air supply valve
knob must be pulled out.
See
Chapter 12, Brake System, for complete brake
operating instructions.
Trailer Brake Hand Control Valve
Lever
The trailer brake lever (hand control valve) is used
for applying the trailer brakes without applying the
truck or tractor brakes. It is usually mounted on the
right-hand control panel. See
Fig. 5.12. See Chap-
ter 12
, Brake System, for complete brake operating
instructions.
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1
2
03/10/99
1. Trailer Air Supply Valve Control
2. Parking Brake Control Valve Control
Fig. 5.11, Dash Brake Valve Controls
10/17/2001
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Fig. 5.12, Trailer Brake Lever
Driver Controls
5.8
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