Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Jeep Cherokee XJ 1988-1989.1993-1995 Approved 1994 XJ Jeep Cherokee 94XJ_16

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J                                                                                PROPELLER SHAFTS           16 - 1

                                     PROPELLER SHAFTS

                                                  CONTENTS
                                                   page                                                        page

GENERAL INFORMATION . . . . . . . . . . . . . . . . . . 1   TORQUE SPECIFICATIONS . . . . . . . . . . . . . . . . 14
PROPELLER SHAFT REPLACEMENT . . . . . . . . . 7             UNIVERSAL JOINT REPLACEMENT . . . . . . . . . . 9
SERVICE DIAGNOSIS/PROCEDURES . . . . . . . . . 3



                                        GENERAL INFORMATION
PROPELLER SHAFTS                                              The propeller shaft must operate through con-
  The function of a propeller shaft is to transmit          stantly changing relative angles between the trans-
power from one point to another. The shaft is de-           mission and axle. It must also be capable of changing
signed to send torque from the transmission (transfer       length while transmitting torque. The axle rides sus-
case on 4WD vehicles) to the axle (Fig. 1,2).               pended by springs in a floating motion. The prop-




                                       Fig. 1 Propeller Shafts (XJ Vehicles)




                                       Fig. 2 Propeller Shafts (YJ Vehicles)
16 - 2     PROPELLER SHAFTS                                                                             J

shaft must be able to change operating angles when
going over various road surfaces. This is done
through universal joints, which permit the propeller
shaft to operate at different angles. The slip joints (or
yokes) permit contraction or expansion (Fig. 1,2).
  Tubular propeller shafts are balanced by the man-
ufacturer with weights spot welded to the tube.
  The propeller shaft is designed and built with the
yoke lugs in line with each other which is called
phasing. This design produces the smoothest running
condition, an out of phase shaft can cause a vibra-
tion.
  Before undercoating a vehicle, the propeller
shaft and the U-joints should be covered. This
will prevent the undercoating from causing an
unbalanced condition and vibration.

CAUTION: Use exact replacement hardware for at-
taching the propeller shafts. The specified torque
must always be applied when tightening the fasten-
ers.
                                                              Fig. 3 Single Cardan Universal Joint
UNIVERSAL JOINTS
  Two different types of U-joints are used with the
propeller shafts:

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