92 - 4
Hub-Assembly
1
Fit drive shaft
26
inner end into splines of differential
gears.
2
Fit needle roller bearing
25
and seal
24
into hub carrier
21
. Pack grease between the lips of seal
24
.
Note
: Do not forc e fit b earing
25
and make sure t he
manufacturer’s mark is facing out.
3
Locate hub swivel, aligning relationship lines, assemble
top and bottom trunnions
19
together with trunnion seal
22
and bearing
23
. Apply Threadlocker and Sealer to
the threads of bolt
20
, torque tighten trunnion retaining
bolts
20
to 98 Nm (72 lbf ft).
4
Lightly oil the inner wheel bearing race. Assemble the
bearing cup and bearing race
17
into the bearing carrier
15.
5
Fit a new combination seal
18
into the bearing carrier
15
so that the chamfer faces the hub swivel. Do not
disassemble seal or use excessive force when fitting.
Do not lub ric at e b efore fit t ing. Use servic e t ool
(892/00891) and spacer to drive the seal squarely into
the carrier until flush.
6
Lightly oil the outer wheel bearing race. Assemble the
bearing cup and bearing race
16
into the bearing carrier
15
. Fit bearing carrier assembly onto axle stub.
Note
: The bearing carrier must be fully supported during the
fitting operation; do not allow any weight to rest on the
bearings, otherwise the inner bearing will be displaced and
damage the seal.
7
Alig n relat io nship m ark s m ad e o n d ism ant ling .
Assemble the annulus ring
13
to the annulus carrier
12
.
Secure with circlip
14
.
8
Fit annulus assembly in the same angular position as
removal, fit retaining plate
11
using new bolts
10
. Do
not fully tighten bolts but allow the bearing carrier to
rock slightly.
Note:
Steps 10 to 12 describe measurement of rolling force.
To measure rolling torque (simplified process), a special tool
is required. See
Service Tools
in this section.
9
Measure seal drag rolling force as follows:
a
Refit the planet gear carrier
2
- DO NOT FIT THE
SUN GEAR
8
.
b
Use a spring balance and cord wrapped around
planet gear carrier
2
as shown. Pull the spring
balance so that the hub rotates, do several times
to let the seal bed in and record the reading.
Remove planet gear carrier
2.
10
Torque tighten bolts
10
evenly to 166 Nm (122 lb ft,
17 kgf).
11
Measure the rolling force as follows:
a
Refit the planet gear carrier
2
- DO NOT FIT THE
SUN GEAR
8
. Use a spring balance and cord
wrapped around the planet carrier as shown. Pull
the spring balance so that the hub rotates and
record the reading.
b
To get the rolling force, subtract seal drag rolling
force (see step
9
) from reading obtained at this
step, the result should be 64 to 117N (14 to 26 lbf).
c
If the resulting figure is outside these limits, check:
the seal is fitted correctly; and/or renew bearings if
nec essary; and / o r new f it t ed c o m p o nent s.
Remove planet gear carrier
2
.
12
Press the drive shaft thrust pad
6
(chamfered side
lowermost) into the recess in the planet carrier
2
.
13
Fit new p lanet gears
4
in p lac e of any t hat w ere
removed.
14
Slide the sun gear
8
(chamfer to be inboard) onto the
drive shaft
26
and secure with circlip
7
. Fit a new 'O'
ring
3
in place of the one discarded during dismantling.
15
Fit the planet carrier
2
onto the bearing carrier
15
ensuring that the two tapped holes are in line with
those on the bearing carrier. Fit and tighten screws
1
after applying Threadlocker and Sealer to the threads.
Torque tighten screws to 56 Nm (41 lb ft).
16
Fill hubs with correct grade oil.
Section F
9803/3280
Section F
92 - 4
Issue 1
Rear Axle - SD80
