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Checking function of viscous coupling
Checking function of viscous coupling
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‒ Drive vehicle front wheels onto rolling road.
Warning!
Ensure area in front of vehicle is kept free. Carry out test with care to avoid damage.
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‒ Engage 1st gear and slowly start driving.
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● If the vehicle is not pushed off the rolling road at between 1500 to 2500 rpm, then the viscous coupling is not OK.
Note:
When driving the front wheels whilst the rear wheels are stationary the viscous coupling will lock-up. This means that the rear wheels are then driven.
The viscous coupling will accept differing speeds for a short period without locking-up, when 1st gear is engaged and engine speed is slightly above idling speed.
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