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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.
If the fan drive fails to engage during these tests, there is something wrong with the VFD (Viscous Fan
Drive). The unit should be replaced.
While returning the failed unit (to Plant for vehicles under warranty) take care to see that the unit is
packed with the sensing coil facing down and sent in the same way. If this is not observed then the
silicone fluid will flow down to bearing, damaging the bearing and also making it impossible to do any
investigation.
Viscous Fan Drive removal –
Caution: Do not remove the fan belt before the
removing the nut.
Remove the shroud.
Loosen the clutch fan nut.
Note that the threads are anticlockwise threads.
Hence to loosen then the direction of rotation has to
be clockwise when viewed from front
The fan blade assembly and the VFD assembly can be
removed together.
Note: The VFD assembly should be kept in 2 positions
only.
As far as possible – in vertical plane.
If in horizontal then the bimetallic strip should be
facing down.
If stored in horizontal position resting on the nut
face then the silicone fluid will flow down to the
bearing assembly and result in contamination of the
bearing’s lubricant.
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