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SUSPENSION SYSTEM
AXIAL PLAY MEASUREMENT OF FRONT
BEARING
1. Following value of axial hub play is acceptablewhen
measured as per illustrated scheme.
a. For a fresh assembly (both bearings new) = Upto
110microns
b. For a old assembly = Upto 160Microns.
2. In case hub play not within specifications, check
tightening torque on the stub axle lock nut.
a. If tightening torque is correct, de-assemble the
hub assembly. In order to establish whether the
hub play is due increase in internal clearances of
bearing or due to loss of interference between hub
ID and bearing OD, measure ID of hub and OD of
bearing and check measurements against
specifications.
i. If hub ID is more than specification and bearing
OD is with in specification, use new hub-cumbrake
drum with existing/old bearings to make fresh
assembly and recheck axial hub play. The axial
hub play should be as per 1b.
ii. If bearing OD is more than specification and hub
ID is with in specification, use new set of bearings
with existing/old hub cumbrake drum tomake fresh
assembly and recheck axial hub play. The axial
hub play should be as per 1a.
iii. In case both hub ID bearing OD are not within
specification, use new hub-cum brake drum and
use new set of bearings to make fresh assembly
and recheck axial hub play. The axial hub play
should be as per 1a
b. If tightening torque is not correct, use a new
lock nut and retighten the nut to specified tightening
torque of 12-14kg-m
c. Recheck the axial play after application of
tightening torque, If axial hub play is within
specification, the assembly should be considered
as healthy and no part replacements are desired.
d. If axial hub play is not within specification, de-
assemble the hub assembly. In order to establish
whether the hub play is due increase in internal
clearances of bearing or due to loss of interference
between hub ID and bearing OD, measure ID of
hub and OD of bearing and check measurements
against specifications.
i. If hub ID is more than specification and bearing
OD is with in specification, use new hub-cumbrake
drum with existing/old bearings to make fresh
assembly and recheck axial hub play. The axial
hub play should be as per 1b.
ii. If bearing OD is more than specification and hub
ID is with in specification, use new set of bearings
with existing/old hub cumbrake drum tomake fresh
assembly and recheck axial hub play. The axial
hub play should be as per 1a.
iii. In case both hub ID bearing OD are not within
specification, use new hub-cum brake drum and
use new set of bearings to make fresh assembly
and recheck axial hub play. The axial hub play
should be as per 1a.
NOTE:
1. Press force should be applied with a press
gradually only on the outer ring face only. No shock
loading is permitted.
2. Any tilting based on the shift between the
measurement body, brake drum & and the
measurement finger should be avoided as it ismost
likely to happen in a overhang manual
measurement