C - Peterbilt Motors Company
C - Peterbilt Motors Company
C - Peterbilt Motors Company
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3<br />
Operating Instructions<br />
Engine Compression Brake Level<br />
Switch Operation<br />
There are 2 switches that control your<br />
vehicle’s engine compression brake.<br />
One switch turns the system on/off and<br />
the second switch controls the braking<br />
level. These switches are located on<br />
the dash switch panel.<br />
For the 3-position engine compression<br />
brake level switch, there will be 100%<br />
engine braking when the switch is in<br />
the up (HIGH) position. In the middle<br />
(MEDIUM) position, there will be 66%<br />
engine braking. In the down (LOW)<br />
position there will be 33% engine<br />
braking.<br />
With the compression brake switch<br />
ON, the compression brake will be<br />
engaged when the service brake is<br />
applied.<br />
If the cruise control is operated in<br />
conjunction with the compression<br />
brake, the compression brake will<br />
3-10<br />
engage to maintain the cruise set<br />
speed.<br />
On/Off Switch Symbol<br />
Compression Brake Level Switch<br />
Symbol
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