JLG 660SJ Operator Manual - Manual (Page 106)

SECTION 6 - GENERAL SPECIFICATIONS & OPERATOR MAINTENANCE
6-20 – JLG Lift – 3121297
10. Fuel Filter - Deutz
Lube Point(s) - Replaceable Element
Interval - Every Year or 600 hours of operation
11. Fuel Filter (Gasoline) - GM
Lube Point(s) - Replaceable Element
Interval - Every 6 months or 300 hours of operation
12. Air Filter
Lube Point(s) - Replaceable Element
Interval - Every 6 months or 300 hours of operation or as
indicated by the condition indicator