Correct answer
Yes, and it must be between the minimum and maximum marks.
Yes, following manufacturer conditions and frequency; the level should be within the applicable marks. If topping-up is required, use the specified fluid and do not overfill. A low level can reduce assistance or damage components; fluid loss needs inspection rather than repeated topping-up alone. Do not wait for steering to become heavy. Purely electric steering has no such reservoir, and not every lorry uses a rack-and-pinion steering mechanism.
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No, it is only necessary when you notice an abnormal increase in the effort needed to turn the lorry's steering wheel.
Yes, and it must be between the minimum and maximum marks.
Yes, and you must check that the reservoir is overflowing.
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