MAINTENANCE MANUAL - Meritor

Assembly
Pinion Roller Bearing Pre-Load Adjustment
The pre-load value of the pinion measured as
per fig. 49 is the one indicated in the table below:
MODELO
120
145/147
155
160
185
Method Using Press
Note :
If a press is not available, use the assembly
method with the yoke (universal joint fork).
A - Lubricate all the pinion roller bearings with
the oil specified in the LUBRICATION section.
B - Press the cone of the front roller bearing
and rotate the pinion box several times to
ensure a suitable seating between covers
and cones. Maintain the pinion box under
the press with an applied load.
MODEL
120
145/147
155/160/185
USED ROLLER
NEW ROLLER BEARINGS BEARINGS
KG LB KG
LB
3,4 - 5,1
0,7 - 6,7
2,1 - 4,8
0,5 - 5,1
0,5 - 5,1
7,7 - 11,8 2,0 - 3,1 4,6 - 6,9
1,7 - 15,0 1,5 - 4,6 3,3 - 10,0
4,5 - 10,6 1,3 - 2,8 3,0 - 6,0
1,3 - 11,4 1,1 - 3,5 2,5 - 7,6
1,3 - 11,4 1,1 - 3,5 2,5 - 7,6
LOAD (TON)
6 (MAX)
C - Wind a cord around the pilot diameter
of the pinion box with a dynamometer
(balance of good quality), tied at its
end (figure 49).
11
14
D - Pull the dynamometer horizontally and observe
the value (pounds or kilos) recorded
on its scale.
Note :
Note the value recorded with the box rotating
and not the start value. The start value
gives a false reading.
Method Without Using Press
If a press is not available during the service
operation, use the following procedure:
A - Lubricate all the hypoid pinion roller bearings
with the oil specified in the LUBRICA-
TION section;
B - Install the fork/flange of the universal joint
(without the pinion sealer);
C - Immobilize the pinion (through the fork/flange
of the universal joint) using a suitable device;
D - Tighten the pinion nut with the minimum
value specified in the TIGHTENING TOR-
QUES section;
E - Turn the pinion box several times to en-sure
a suitable seating between covers and
cones;
F - Wind a cord around the pilot diameter of the
pinion box with a dynamometer (balance of
good quality), tied at its end. (figure 49);
G - Pull the dynamometer horizontally and observe
the value (pounds or kilos) recorded
on its scale;
Note :
Note the value recorded with the box rotating
and not the start value. The start value
gives a false reading.
H - If after tightening with the maximum limit of
torque, the desired pre-load is not obtained,
replace the wedges by thinner ones and re-
-peat the checking procedure;
I - Remove the fork/flange of the universal joint
and continue to reassemble the differential.
Figure 49
24 MAINTENANCE MANUAL