TECHNICAL INFORMATION
5 - 3
Brakes
• Dual system plus emergency/parking brake
• Air operated:
disc type on front axle and tag axle
drum type on drive axle
• Brake chamber effective area:
24 in
2
on front axle
30 in
2
(service) and 36 in
2
(emergency/parking)
on drive axle
16 in
2
(service) and 16 in
2
(emergency/parking)
on tag axle
• Automatic slack adjuster
• Two cylinder air compressor, engine gear
driven, water-cooled and lubricated
• Air dryer
• Nylon color-coded air lines
Antilock Braking System
(ABS)
Components:
• Electronic control module
• Solenoid control valve
• Sensors
• Clamping bushes
• Wiring harnesses
Electronic control module technical data
Maintenance free
Voltage............................................... 24 ± 6 volts
Thermal operating range .................-40 to 167 °F
(-40 to 75 °C)
Solenoid control valve technical data
Maintenance free
Voltage:........................... 24 (+4.8, -2.4) volts DC
Rated current:......................................1.65 amps
Thermal operating range: ................-40 to 176 °F
(-40 to 80 °C)
Sensor technical data
Two cored screened cable: ......AWG 18 (1 mm²)
Thermal operating range: ................-40 to 176 °F
(-40 to 80 °C)
Steering
• Tilt steering wheel and telescopic steering
column
• Integral hydraulic-assisted steering gear
• System pressure: 2000 psi (13 800 kPa)
Electrical System
• 24 volt system
• 12 volt exterior lighting
• 24 volt, 270 amp, self-rectified, gear-driven, oil-
cooled
Delco
alternator lubricated by engine
circuit
• Four 12 volt, maintenance-free batteries with a
1250 cold cranking amp capacity
• 50 amp or 100 amp battery equalizer (optional)
• 12 volt, 145 amp, air-cooled, belt-driven, addi-
tional alternator (optional)
Suspension
Front axle
• 2 air springs
• 2 shock absorbers
• 4 longitudinal radius rod
• 1 transversal radius rod
• 1 height control valve
• 1 sway bar
Drive axle
• 4 air springs
• 4 shock absorbers
• 3 longitudinal radius rod
• 1 transversal radius rod
• 2 height control valve
• 1 sway bar
Tag axle
• 2 air springs
• 2 shock absorbers
• 3 longitudinal radius rod
• 1 transversal radius rod