JLG 660SJ Operator Manual - Manual (Page 130)

SECTION 6 - GENERAL SPECIFICATIONS & OPERATOR MAINTENANCE
6-26 – JLG Lift – 3121205
8. Hydraulic Return Filter
Interval - Change after first 50 hrs. and every 6 months or
300 hrs. thereafter or as indicated by Condition Indicator.
9. Hydraulic Charge Filter
Interval - Change after first 50 hrs. and every 6 months or
300 hrs. thereafter or as indicated by Condition Indicator.