MCi Crusader II 1989 Maintenance Manual page 457

Date
1-1-89
Page
~-----'--',4C....::-s;__ _ _
MC-9 MAINTENANCE MANUAL
Journal cross seals are designed to relieve. However, if all
the seals do not "pop" when being lubed, move the driveshaft
laterally in all four directions and pull or push on the driveshaft
in the direction opposite to the journal cross seal not relieving
while lube gun pressure is being applied to the alemite fitting.
An increase in line pressure may also be necessarv.
If seals fail to purge. cup removal may be necessary to
remove the obstruction and promote lubrication.
Identifying features
Seal Double lip pressed in bearing
assembly.
Lube Check Valve in 1ournal cross
lube reservoir cavities.
Figure 14-4. Seal Cross Sectional View.
DRIVE SHAFT ASSEMBLY
Factory assembled drive shafts are lubricated at the plant
prior to shipment. When installing spare parts replacement
assemblies, it is recommended that all universal joints be lubri-
cated after installation of the drive shaft prior to putting vehicle
in service. High quality extreme pressure (EP) grease is
recommended for universal joints. Lithium soap base greases
meeting NLGI Grade 1 and Grade 2 specifications are pre-
ferred. The use cf greases that tend to separate and cake
should oe avoided. Refer to Section 10 for lubrication intervals.
RELUBE CYCLES
Relubrication cycles for drive shaft universal joints and slip
splines vary with operating conditions. The following relubrica-
ti-:-.,
~ched• •le has been used successfully.
Mlln Kilometers
Normal
6.000-8.000 9. 700-13,000
*Severe
2,000-3,000 3,200- 4,800
Hours
150-200
50- 75
*Such as high ambient temperatures or extremely rough road
-:;onditions.
TROUBLESHOOTING
Noise and vibration in the drive line often originate in the
propeller shaft Noise and vibration originating in the universal
AGED SEAL
Figure 14-5. Journal Cross Assembly.
•Figure 14-6. Sleeve Yoke End of Spline.
joint and propeller shaft assembly appear only at certain
speeds, and usually come and go as the vehicle speed is
increased or decreased. Noises produced by the rear axle, on
the other hand, are generally present throughout the vehicle's
speed range.
When propeller shaft assembly noise and vibrat_ion becomes
excessive, the cause should be determined and corrected
immediately, since rear axle pinion failure is often a direct
result. Propeller shaft noise and vibration often appear to origi-
nate in the rear axle.
Common causes of propeller shaft and universal joint vibra-
tion are (a) propeller shaft assembly out of balance; (b) exces-
sive flange runout or distorted yokes; {c) loose yoke nuts; {d)
universal joint yoke misalignment.