PROPELLER SHAFT JOINTS
DESCRIPTION
Two different types of propeller shaft joints are
used in AN vehicles (Fig. 5) and (Fig. 6). None of the
joints are serviceable. If worn or damaged, they must
be replaced as a complete assembly.
LUBRICATION
The factory installed universal joints are lubricated
for the life of the vehicle and do not need lubrication.
All universal joints should be inspected for leakage
and damage each time the vehicle is serviced. If seal
leakage or damage exists, the universal joint should
be replaced.
PROPELLER SHAFT JOINT ANGLE
DESCRIPTION
When two shafts come together at a common joint,
the bend that is formed is called the operating angle.
The larger the angle, the larger the amount of angu-
lar acceleration and deceleration of the joint. This
speeding up and slowing down of the joint must be
cancelled to produce a smooth power flow.
OPERATION
This cancellation is done through the phasing of a
propeller shaft and ensuring that the proper propel-
ler shaft joint working angles are maintained.
A propeller shaft is properly phased when the yoke
ends are in the same plane, or in line. A twisted
shaft will make the yokes out of phase and cause a
noticeable vibration.
When taking propeller shaft joint angle measure-
ments, or checking the phasing, of two piece shafts,
consider each shaft separately.
Fig. 6 Double Cardan U-Joint
Fig. 5 Single Cardan U-Joint
1 – CROSS
2 – SEAL
3 – CAP AND NEEDLE BEARINGS
3 - 4 PROPELLER SHAFTS DN
DESCRIPTION AND OPERATION (Continued)
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