PUTTING THE VEHICLE IN MOTION
PART 7: STARTING & OPERATING THE VEHICLE
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Y53-6032
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3. Off-Highway: When you are driving on rough terrain
and secondary roads, or under a very heavy load,
keep the axle in the LOW range. Shift your transmis-
sion to maintain the road speed you want.
4. When you go from off-highway to highway driving,
shift the axle to the HIGH range this way:
a. Be sure the differential is UNLOCKED.
b. Keep the accelerator down and move the Range
Selector lever to HIGH.
c. Keep driving with the accelerator down until you
want the axle to shift.
d. Then release the accelerator until the axle has
shifted.
e. You are now in the HIGH axle range on the highway.
Shift the transmission normally to reach your
desired cruising speed.
5. If you need to downshift the axle for more power
a. Keep the accelerator down & move the Range
Selector lever to LOW.
b. Keep driving with the accelerator down until you
want to downshift the axle.
c. Then release and depress the accelerator pedal
quickly to increase the engine RPM.
d. The axle will shift to the LOW range.
Important Tips on Operating Your Dual Range Axle
NOTE: If your vehicle has an automatic transmis-
sion, it may be necessary to shift it to the Neutral
position momentarily to allow the main differential
lock splines to fully engage or disengage.
To avoid damaging your vehicle, shift the axle at a slower
speed until you are used to driving with the dual range
axle.
When driving on a surface with good traction, keep the
interaxle differential unlocked. You can drive with the axle
in LOW or HIGH range.
Interaxle In Unlock
SHIFT AT ANY SPEED EXCEPT
IF A WHEEL IS SPINNING
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Y53-6032.book Page 104 Monday, May 24, 2010 3:37 PM
Содержание Peterbilt 587
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