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 113 of 452

Table 11. Tractor and Trailer Parking Brake Controls - Continued.

Key

Control/Indicator

Function

2.

SYSTEM PARK

Control

WARNING

Never use the parking brake in place of the service

brake for stopping the tractor. Sudden lockup of

spring brakes may result in loss of control of tractor

and possible damage to equipment and injury or

death to personnel. Seek medical attention in the

event of an injury.

The SYSTEM PARK control is a valve used to apply

or release the parking brakes. To apply the parking

brakes, bring tractor to a complete stop, then pull the

SYSTEM PARK control knob out. The PARK

BRAKE indicator will illuminate red when the

SYSTEM PARK Control is in the out position. Push

the knob in to release the parking brakes. If tractor is

connected to a trailer, push in the TRAILER AIR

SUPPLY control knob after releasing the tractor

parking brakes.

TM 9-2320-273-10

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