C - Peterbilt Motors Company
C - Peterbilt Motors Company
C - Peterbilt Motors Company
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3<br />
Operating Instructions<br />
Compression Brake<br />
With the compression brake switch<br />
ON, the brake automatically creates its<br />
braking effect when you remove your<br />
foot from the accelerator pedal.<br />
The brake switch is located on the<br />
accessory dash panel. It controls<br />
whether the brake is ON (ready to slow<br />
the vehicle down) or OFF (no braking<br />
action).<br />
• Do not use the engine<br />
compression brake to slow<br />
the vehicle down when you are<br />
bobtailing or pulling an empty<br />
trailer.<br />
• Make sure the brake is OFF before<br />
starting the engine.<br />
• After the engine is started, warmed<br />
up, and you are ready to get under<br />
way, turn the engine compression<br />
brake switch ON for added braking<br />
effect.<br />
3-8<br />
NOTE: If your vehicle is<br />
equipped with the Eaton<br />
Vorad® system, operation of<br />
the compression brake may be<br />
automatically activated.<br />
Compression Brake Controls<br />
Two (2) switches on the dash panel<br />
control the engine compression brake.<br />
A master switch turns the system ON<br />
or OFF. A second switch, located<br />
next to the master switch, controls<br />
the braking effect. This switch allows<br />
you to choose progressively stronger<br />
braking to slow the vehicle down.<br />
Engine compression brake controls<br />
include:<br />
• On/Off switch.<br />
• 3-position selector switch.<br />
• Clutch switch.<br />
• Throttle sensor.<br />
• Service brake pressure switch.<br />
• Eaton Vorad® Anti-Lock Braking<br />
System<br />
Engaging conditions for the engine<br />
compression brake are:
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