Spicer Driveshafts Service Manual - Manual (Page 7)

4
Inspection Procedures
Inspection Procedures
Inspection Procedures
Visually inspect all input and output end-fitting retaining nuts
or bolts for any gaps between mating surfaces. If gaps are
present, consult transmission, axle or transfer case original
equipment manufacturers' service and maintenance manuals
for proper fastener specifications.
Visually inspect for damaged bearing retainers or stamped
straps, loose bearing retainer bolts or strap bolts, loose com-
panion flange bolts and nuts, loose or missing spring tabs or
spring tab bolts, damaged tangs on end fittings, damaged or
missing snap rings, and rotating bearing cups.
If any of these situations are evident, replacement of the com-
ponents is necessary. Refer to the removal and installation
sections of this manual for proper replacement procedures.
Universal Joints
Note: The following procedures are to be performed prior to
any lubrication of universal joints or slip members. The
addition of lubricant can mask the looseness in a com-
ponet that is beginning to show wear and may be in
need of replacement.
1. Check for excessive looseness across the ends of
the universal joint bearing cup assemblies and trun-
nions. Take hold of the inboard yoke on the drive-
shaft with both hands. Try to move the yoke
vertically and horizontally.
There should be less than .006" (.15mm) movement
in the universal joint relative to the inboard or out-
board yokes. If looseness is greater than .006"
(.15mm), the universal joint kit may need to be
replaced.
Note: If the movement of the driveshaft is greater than .006",
the carrier assemblies input shaft and/or output shaft
ends play must be checked to make sure they are within
specification. Endplay readings that are out of specifica-
tion must be corrected before an accurate driveshaft
reading can be taken. Refer to the Input/Output Shaft
Endplay Inspection procedure.
Excessive looseness across ends of universal joint bearing
cup assemblies can cause imbalance or vibration in the
driveshaft assembly. Imbalance or vibration can cause
component wear, which can result in separation of the driv-
eline from the vehicle.
Check Input Shaft End-Play (Forward Axle)
a. Position dial indicator at yoke end of input shaft.
b. Push on input shaft and zero dial indicator.
c. Using pry bar, move input shaft axially and measure/
record end-play.
Add shims to increase end-play.
Note: Input and output shaft endplay specifications will vary
between model. Refer to manufacturer’s service manual
for correct endplay specifications.
IMPORTANT
WARNING