Peterbilt Model 320 Operator's Manual after 8-07 - Peterbilt Motors ...
Peterbilt Model 320 Operator's Manual after 8-07 - Peterbilt Motors ... Peterbilt Model 320 Operator's Manual after 8-07 - Peterbilt Motors ...
Fifth Wheel Lock (Slider Adjustment) Switch WARNING! Placing the differential lock in the “LOCK” position while your wheels are spinning could cause loss of control or axle damage. You could be hurt. Switch to “LOCK” only when your wheels are not spinning. See "Interaxle Differential" for more information on using your interaxle differential. Two-Speed Rear Axle (Range) Switch PART 4: CONTROLS AND DISPLAYS for highway speeds. There is a guard over this switch to prevent you from accidentally changing speeds. For information on how to operate your two-speed rear axle properly and safely, see "PART 7: STARTING & OPERAT- ING THE VEHICLE" or check the Index, under Two-Speed Rear Axle (Range) Switch 29. Fifth Wheel Lock (Slider Adjustment) Switch 03030 If your vehicle is equipped with a two-speed rear axle, you can select the axle range by the dash-mounted switch shown above. The low range provides maximum torque for operating off-highway. The high range is a faster ratio 03031 Vehicles having an air-slide fifth wheel have a fifth wheel slider lock controlled by a switch on the instrument panel. – 34 – Y53-6015 R(08/07)
PART 4: CONTROLS AND DISPLAYS By placing the switch in the unlock position, you can slide the fifth wheel to various positions to adjust weight distribution. There is a guard over this switch to protect you against accidentally activating or releasing the lock. Parking Brake Valve and Trailer Air Supply Valve Parking Brake Valve and Trailer Air Supply Valve WARNING! Do not move the fifth wheel while the tractor-trailer is in motion. Movement of the fifth wheel while a tractor-trailer is moving can cause a serious accident. Your load could shift suddenly, causing you to lose control of the vehicle. Never operate the vehicle with the switch in the unlock position. Always inspect the fifth wheel after you lock the switch to be sure the fifth wheel is engaged. 02908 Single Valve Your parking brake valve is a yellow diamond-shaped knob located on the right-hand control panel. It controls the parking brakes for either straight truck or tractor-trailer combinations. • At a right-hand drive station, a second single valve is located on the dash to the left of the steering wheel. R(08/07) Y53-6015 – 35 –
- Page 3: Quick Table of Contents PART 1: INT
- Page 6 and 7: Additional Sources of Information S
- Page 8 and 9: Vehicle Safety NOTE: Gives you info
- Page 10 and 11: PART 2: CAB AND FRAME ACCESS Be car
- Page 12 and 13: Climbing Onto the Deck Plate WARNIN
- Page 14 and 15: Cab Tilting PART 3: GETTING TO YOUR
- Page 16 and 17: Raising the Cab PART 3: GETTING TO
- Page 18 and 19: Lowering the Cab PART 3: GETTING TO
- Page 20 and 21: Your Instrument Panel PART 4: CONTR
- Page 22 and 23: Warning Alarms PART 4: CONTROLS AND
- Page 24 and 25: Turn Signal and Indicator Lights PA
- Page 26 and 27: Trailer Brake Hand Valve PART 4: CO
- Page 28 and 29: Ignition Switch Dash-Mounted Featur
- Page 30 and 31: Panel Light Knob Headlights PART 4:
- Page 32 and 33: Windshield Wipers and Washers PART
- Page 34 and 35: Air Suspension Deflate Switch (Dump
- Page 36 and 37: Engine Brake Cruise Control Switch
- Page 40 and 41: Heating And Air Conditioning Contro
- Page 42 and 43: Heating And Air Conditioning Contro
- Page 44 and 45: Heating And Air Conditioning Contro
- Page 46 and 47: Gauges And Displays Cigarette Light
- Page 48 and 49: Speedometer-Message Center (SMC)
- Page 50 and 51: Air Application Gauge Tachometer Ai
- Page 52 and 53: Engine Oil Pressure Gauge WARNING!
- Page 54 and 55: Water Temperature Gauge cept for ce
- Page 56 and 57: Front Drive Axle or Rear Drive Axle
- Page 58 and 59: Air Filter Restriction Indicator Ga
- Page 60 and 61: Mirrors Mirrors WARNING! Optional c
- Page 62 and 63: Lap/Shoulder Belt PART 5: SEAT AND
- Page 64 and 65: Proper Safety Belt Adjustment PART
- Page 66 and 67: Pregnant Women PART 5: SEAT AND RES
- Page 68 and 69: Tether Belts PART 5: SEAT AND RESTR
- Page 70 and 71: Inspection of the Restraint System
- Page 72 and 73: Inspection of the Restraint System
- Page 74 and 75: Checking Under the Hood or Cab PART
- Page 76 and 77: After Engine Warmup 17.Check spring
- Page 78 and 79: Engine Warmup If the engine still w
- Page 80 and 81: Transmission Warmup CAUTION: The us
- Page 82 and 83: Shifting Gears in a New Vehicle CAU
- Page 84 and 85: Operating the Clutch service depart
- Page 86 and 87: Dual Range (Two Speed) Axles WARNIN
Fifth Wheel Lock (Slider Adjustment) Switch<br />
WARNING! Placing the differential lock in the<br />
“LOCK” position while your wheels are spinning<br />
could cause loss of control or axle damage.<br />
You could be hurt. Switch to “LOCK” only<br />
when your wheels are not spinning.<br />
See "Interaxle Differential" for more information on using<br />
your interaxle differential.<br />
Two-Speed Rear Axle (Range) Switch<br />
PART 4: CONTROLS AND DISPLAYS<br />
for highway speeds. There is a guard over this switch to<br />
prevent you from accidentally changing speeds.<br />
For information on how to operate your two-speed rear axle<br />
properly and safely, see "PART 7: STARTING & OPERAT-<br />
ING THE VEHICLE" or check the Index, under Two-Speed<br />
Rear Axle (Range) Switch 29.<br />
Fifth Wheel Lock (Slider Adjustment)<br />
Switch<br />
03030<br />
If your vehicle is equipped with a two-speed rear axle, you<br />
can select the axle range by the dash-mounted switch<br />
shown above. The low range provides maximum torque<br />
for operating off-highway. The high range is a faster ratio<br />
03031<br />
Vehicles having an air-slide fifth wheel have a fifth wheel<br />
slider lock controlled by a switch on the instrument panel.<br />
– 34 – Y53-6015 R(08/<strong>07</strong>)
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