SECTION 11: REAR AXLES
10
DOB 2490-2789 | X3-45 Commuter PA1605 Maintenance Manual (Final Version – Rev.2 April 2016)
FIGURE 7: JACKING POINTS ON TAG AXLE
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4. Disconnect tag axle lifting chain collars from
lower longitudinal radius rods.
5. Remove the propeller shaft as directed in
Section 9,
"Propeller Shaft",
in this manual.
6. Disconnect the tag axle brake chamber
hoses.
CAUTION
Position the hoses so they will not be damaged
when removing axle.
7. Disconnect hose from the air spring upper
mounting plate.
8. Remove the two shock absorbers as outlined
in Section 16,
"Suspension",
under
"Shock
Absorber Removal".
9. Disconnect the lower longitudinal radius
rods as outlined in Section 16,
"Suspension",
under
"Radius Rod Removal".
10. Disconnect the transversal radius rod.
11. Disconnect the upper longitudinal radius rod.
12 Remove the air bellows retaining nuts from
each of the two upper mounting plates.
13. Use the jacks to move the axle forward to
clear the axle off the transmission. Lower the
axle.
CAUTION
On vehicles equipped with an output retarder
and an automatic transmission, move tag
assembly very carefully. Pay special attention
to the U-shaped section, as the transmission
end components may be easily damaged
through a false maneuver.
14. Reverse removal procedure to reinstall tag
axle.
NOTE
Refer to Section 16, "Suspension", for proper
torque tightening of suspension components.
NOTE
Refer to section 13 "Wheels, Hubs And Tires"
for correct wheel bearing adjustment procedure.
2.5.3
Removing Transversal radius Rod
Unfasten bolts and nuts fixing transversal radius
rod ball joint to rear underframe.
Install extractor tool G32952 onto transversal
rod.
FIGURE 8: INSTALLING EXTRACTOR TOOL
CAUTION
It is strongly suggested to use the extractor tool
in order to remove transversal radius rod.
Partially unscrew ball joint fixing bolt. Tighten
extractor threaded rod.
Supporting the transversal radius rod at all
times, gradually extract transversal radius rod
from tag axle.
Reinstall by reversing procedure. Torque bolt to
190 lbf-ft dry (255 Nm) dry.
2.6
TAG AXLE ALIGNMENT
The tag axle alignment consists in aligning the
tag axle parallel to the drive axle position. Before
aligning the tag axle, proceed with the drive axle
alignment (paragraph 1.10). Tag axle alignment
is achieved with the use of shims inserted
between the lower longitudinal radius rod
supports and axle. Tag axle alignment is factory
set and is not subject to any change, except if
vehicle has been damaged by an accident or if
there are requirements for parts replacement.
CAUTION
If this setting is altered significantly, it will
cause excessive tire wear.
