JLG 740AJ ANSI Operator Manual - Manual (Page 112)

SECTION 6 - GENERAL SPECIFICATIONS & OPERATOR MAINTENANCE
6-16 – JLG Lift – 3121650
4. Hydraulic Return Filter
Interval - Change after first 50 hrs. and every 6 months or
300 hrs. thereafter or as indicated by Condition Indicator.
5. Hydraulic Charge Filter
Interval - Change after first 50 hrs. and every 6 months or
300 hrs. thereafter or as indicated by Condition Indicator.