NANO

454 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 l ikely to happen in a overhang manual measurement