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Check clutch cooling fan

Magnetic Coupling

Cross-section of a magnetic fan clutch

1 - the primary drive 2 - drive the hysteresis 3 - secondary drive	4 - a permanent magnet 5 - steel disc 6 - Ball Bearings

PERFORMANCE ORDER

With the engine stopped vrescheyte fan by hand and make sure that it rotates uniformly and silently. Replace coupling fan if she does not resist rotation or running noise.

A viscous clutch

Cross-section of viscous fan clutch

1 - clutch housing (secondary part) 2 - a leading disk (primary part) 3 - shaft flange 4 - consolidation 5 - the needle bearing 6 - cooling fins 7 - the oil scraper 8 - a spring	9 - thrust finger 10 - bimetallic plate 11 - a cover holder 12 - Spacer 13 - the incident hole 14 - the valve lever 15 - tank 16 - working chamber

PERFORMANCE ORDER

Warm up the engine to normal operating temperature and maintain his speed from 4000 to 4500 rev / min. Do not cover the radiator, otherwise the clutch is not to react to changes in temperature. With the thermometer (temperature gauge), make sure that the heating of the engine to 90-95 ?� C the fan speed increases by about 1000 rev / min. When properly operated clutch it will be noticeable to the ear. Faulty clutch must be replaced.