Drive Shaft Assembly - Place in a pair of centers and
check the shaft for runout if not previously done during
assembly. The runout on the tube should not be more than
.38 mm (.015") indicator reading, and on the neck of the slip
stub shaft the runout should not be more than .12 mm (.005")
indicator reading. Mark the high and low points on the shaft
with chalk and straighten if necessary. Install with the slip joint
nearest the source of power. Tighten the flange bolts evenly
after the nuts and NEW lockwashers are in place.
CHECKING DRIVESHAFT ANGLES
The procedure to check driveshaft angles for proper
universal joint operating angles follows:
Remember to check driveshaft angles both with
the tractor fifth wheel unloaded, and loaded with
To determine driveshaft angles, a spirit level
protractor is required (Fig. 43). When angles
are read from the 0 deg. Mark (for example,
measuring inter-axle shaft angle - 5 deg.),
record and use the angle shown on the
protractor. When angles are read from either of
the 90 deg. Marks (vertically) for example,
measuring yoke angles, do not record the angle
shown on the protractor since the 90 deg.
marks must be understood to be the same as 0
deg. On the horizontal plane. Thus, if a vertical
reading is 85 deg., the angle being measured is
All angles should be read within 1/4 deg. (15
minutes) and they should be measured with the
protractor held plumb on a clean, flat surface.
Inflate all tires to the pressure at which they are
normally operated. Park the tractor on a
surface which is as nearly level as possible both
from front-to-rear and from side-to-side.
The tractor must be in its normal operating
position. Do not attempt to level the truck by
jacking up the front or rear axles to obtain a
Check and record the angle on the engine and
main transmission. This reading can be taken
at the rear of the main transmission on the
output yoke or flange. Record this reading on a
sketch similar to Fig. 44 (Example on Fig. 45, -
1 deg. down).
Move protractor to the 0 deg. reading and
check driveshaft angle between transmission
and forward axle (Example 4 deg. 30 sec.
Check front axle input yoke angle with protractor
(Example - angle up 2 deg. 30 sec.), also
check front axle output yoke (Example angle
down 2 deg. 20 sec.).
Measure the angle of the tandem driveshaft
between the front axle and first rear axle
(Example 5 deg. down).
(Example 12 deg. up).
See Page 23 for legend.
CTS-4017 - Page 22
PRINTED IN UNITED STATES OF AMERICA