How does Caterpillar indicate service interval reminders on agricultural equipment?

Caterpillar uses specific pictograph symbols to indicate service intervals, including '500 H Service,' '100 H Service,' '50 H Service,' and '10 H Service' symbols. These are listed in the Agricultural Tractors section of the pictograph dictionary. (Page 8)

From the official Cat Warning Symbols And Meanings Guide manual, page 8

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