Peterbilt 579 - Page 133

SWITCHES
1. Axle Diff-Lock - Dual
Turn
switch on to engage Front
7. Axle, Two Speed
and Rear
Axle Diff Lock.
If equipped,
the two speed axle
switch allows you to select axle high
2. Axle Diff-Lock
- Forward Rear
and low ranges. The low range
Turn switch on to engage Forward
(Off) provides maximum torque for
Rear Axle Diff Lock.
operating off-highway. The high
range (On)
is a faster ratio for
3. Axle Diff
Lock - Steer
highway speeds. This switch does
Turn
switch on to engage Front
not require
ignition power to maintain
Axle Diff
Lock.
the desired
switch setting.
8. Batteries, Low Voltage
4. Axle Diff-Lock
Rear Rear
Disconnect (LVD)
Turn
switch on to engage Rear
Rear Axle
Diff Lock.
If your vehicle is equipped with a Low
5. Axle Diff Lock - Single Rear
Voltage Disconnect (LVD) feature,
Turn switch on to engage Single
the LVD module is located inside the
Rear Axle Diff Lock.
driver's side kick panel.
6. Axle, Inter-Axle Differential
9. Brakes, ABS Off-Road
Locked (Tandem)
Turn
switch on to engage ABS
Turn
switch on to engage Inter-Axle
Off-Road
mode. See Anti-Lock
Differential
Lock.
Braking System
on page 4-20.
10. Brakes, Parking
Brake Valve
Pull yellow
knob to activate parking
brakes. See
Parking Brake Valve
on page
4-22.
11. Cab Dimmer Switch
This switch
is used to alter the
brightness of the instrument
panel lights.
12. Dump Truck
Gate
Turn
switch on to open Dump
Truck Gate.
13. Engine, Brake
Level
In the
up position there will be 100%
engine retarding. In the middle
position there will be 60% engine
retarding. In the down position there
will be 33% engine retarding.
For more information on when and
how to use the engine brake in your
vehicle, see the engine brake owner’s
manual for additional engine brake
information.
14. Engine, Brake On/Off
Turn
switch on to activate Engine
Brake system.
For more information on when and
how to use the engine brake in your
3
(04/13) Y53-6047–2C 3-61