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Repair Manual
MAN-00
190
THAR
CRDe
BS-IV
MAY
2012
/Rev 1
The repair methods given by the manufacturer in this document are based on the technical specifications, current at the time of release. The methods may be modified as a result of changes introduced by the
manufacturer in the production of the various component units and accessories from which the vehicles are manufactured. The reproduction, translation, transmission, in part of or whole of the present
document, are prohibited without the prior written consent of Mahindra & Mahindra Ltd. The use of this document by any person other than the trained personnel, at the Authorized Service Centre of Mahindra
& Mahindra Ltd., will amount to unauthorized use and shall be liable for penalty/prosecution© 2012 Mahindra & Mahindra Ltd.
Automatic Locking Hub
Construction
When 4‐wheel drive is selected, the automatic hub locks the axle shaft to the wheel hub. This occurs
when the vehicle is driven in either forward or reverse direction. The hub unlocks when 2 ‐wheel drive
is selected, and the vehicle is driven in the opposite direction for a few feet.
The 4 Tanged washers are held in place on the Wheel Spindle. The cut outs on the drag sleeve (26) fit
over the tangs on the washer, preventing the drag sleeve from rotating. The brake band (24) fits over
the serrated portion of the drag sleeve. The tangs of the brake band are fitted through the window in
the steel inner cage (21). The plastic outer cage (20) fits over the inner cage. Each tang of the brake
band fits through each cut out in the outer cage. The cam follower (19) is attached to the clutch gear
(15). The follower profile on the cam follower (A) ride against the cam faces or ramps of the steel
inner cage. The clutch gear slides on the splines on the outside the hub sleeve (16). The axle shaft(C) is
splined to the inside of the hub sleeve. The large teeth on the outside of the clutch gear can engage
the teeth inside the outer clutch housing (9).The outer clutch housing is bolted to the wheel hub. An
End Cap (2) fits over the hub lock assembly. The end cap contains a bearing assembly (6) that supports
the other end of the hub sleeve. The End Cap is fitted with Aluminium Decorative Plate (1) for better
aesthetics.
Briefly, this is what happens when the hub locks.
The clutch gear (15) and cam follower (19) rotate up the cam face of the inner cage (21). This causes
the clutch gear to move outward on the hub sleeve (16). The outside teeth of the clutch gear engage
the inside teeth of the outer clutch housing (9), locking the wheel hub to the axle shaft.
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