John Deere 5310 S - Manual (Page 123)

Service
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Service Air Cleaner at Regular Intervals
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A—Air Restriction Indicator
Service air cleaner if air restriction indicator (A) illuminates
or at least every 250 hours. Replace air cleaner elements
at least once a year.
The smaller “secondary” element should be removed only
when being replaced, normally once a year. (See Replace
Air Cleaner in Service—250 Hours section.)
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Checking Air Intake System
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Check all air intake system clamps for tightness.
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