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17

4 DLT ENGINE

Fig. 9

Fig. 10

ENGINE DISMANTLING PROCEDURE

(Engine mounted on the work stand)

Removal of cooling fan

Unstake lock plates and remove fan mounting bolts.

Now remove fan along with hub. (Refer Fig. 9)

Fig. 11

Removal of viscous drive fan (if fitted)

Remove viscous fan mounting nuts & remove viscous

fan assembly (Fig. 10)

Observe following precautions while handling

viscous fan.

1. The assembly viscous fan to be stored in the

upside down condition. This is to prevent the

silicone oils leakage through the oil seal. (Fig. 11)

2. While assembling / disassembling the viscous fan.

Take proper care to avoid damages to bimetallic

coil (located on viscous clutch housing towards

radiator)

3. Care of viscous coupling to ensure lifelong trouble

free service.

a. The viscous coupling should not be cleaned with

high-pressure water spray or steam cleaning

equipment.The use of such high-pressure water /

steam can cause damage to the bearing seal which

allows water to enter the bearing.The presence of

water in the bearing grease can cause corrosion

and premature failure.

b. The fan should be inspected during each scheduled

servicing to ensure that none of the blades are

damaged. Such damage can occasionally be

caused if the stones or other foreign objects get

thrown up from the road against rotating fan.

Damage to the fan causes an imbalance situation

which is detrimental to the fan clutch bearing, and

inevitably shortens the life of viscous coupling unit.