Medium Duty Operator's Manual - Peterbilt Motors Company

OPTIONAL GAUGES
To Wash The Windshield
Push the rotary wash/wipe knob in (towards steering column),
hold for more than 0.8 seconds and then release.
Hold the knob in to extend the washing cycle. After the
lever is released, the wipers will shut off automatically or
resume the wiper’s setting speed.
To activate the wipers for one swipe without activating the
washer (“mist” function), push the turn signal lever in
(towards the steering column) and release in less than 0.5
seconds. The wipers will perform a single swipe and then
resume the wiper’s setting speed.
Check the windshield washing fluid level daily. If necessary,
fill to top.
Clean all inside and outside windows regularly. Use an
alcohol-based cleaning solution and wipe dry with either a
lint-free or a chamois cloth. Avoid running the wiper
blades over a dry windshield to prevent scratching the
glass. Spray on washer fluid first. A scratched windshield
will reduce visibility.
Electric Horn
CONTROLS AND DISPLAY
Your Peterbilt has an electric horn. To operate, press on
the horn symbol near the center of the steering wheel.
Air Operated Horn (Option)
Your Medium Duty may be equipped with an air horn. To
operate, pull on the lanyard extending from the overhead
header panel.
Trailer Brake Hand Valve
This hand valve provides air pressure to apply the trailer
brakes only. It operates independently of the foot treadle
valve.
– 46 – Y53-6008A Medium Duty (R05/09)