operators_manual

joint working angles. This can result in pre-
mature driveline wear and driveline
vibration.
If it becomes necessary to reset the ride
height, you may temporarily set it by
following the next procedure. Proper ride
height measurement and values are shown
in the illustration and table below.
CAUTION
Completing this procedure will enable
you to safely reach the nearest author-
ized dealer or repair facility to have
ride height and pinion angle reset us-
ing the proper equipment and techni-
que. Do this as soon as possible to
avoid potential driveline damage.
NOTE
Suitable wheel chocks are at a mini-
mum an 18-inch (46 cm) long 4x4.
1. Park the vehicle, engage the
parking brakes and clock the
wheels.
2. Locate the air suspension ride
height valve
3. Ensure that the tractor is fully laden
during this procedure. Do not use
these procedures on a vehicle that
is not laden (bobtail).
4. Ensure the air supply and delivery
plumbing of the height control valve
is consistent with the following
illustrations.
5. Loosen the fasteners mounting a
height control valve to its bracket.
6. Rotate the valve either clockwise or
counterclockwise until air pressure
in the air springs provides the ride
height specified for that
suspension. Measure the ride
height from the bottom of the frame
rail to the approximate centerline of
the rearmost drive axle hub:
• For tandem axles, make the
vertical measurement at the
centerline of the suspension
• For a single axle, make the
measurement in front of the
axle, in the area forward of the
tires but not past the
suspension bracket.
7. When at the correct ride height,
ensure that the height control valve
lever is in the neutral position, then
install either the built-in alignment
pin or a 1/8-inch (3 mm) dowel.
8. Torque the mounting fasteners to
55-75 lb-in (6.2-8.5 Nm.).
9. Remove the alignment pin or
dowel.
DRIVING - Axle and Suspension
162 Y53-6047-2HEN (03/18)
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