JLG 680S Operator Manual - Manual (Page 105)

SECTION 6 - GENERAL SPECIFICATIONS & OPERATOR MAINTENANCE
3121678 – JLG Lift – 6-17
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 (if
equipped).