JLG 1500SJ Operator Manual - Manual (Page 176)

SECTION 7 - GENERAL SPECIFICATIONS & OPERATOR MAINTENANCE
7-16 – JLG Lift – 3121261
5. Hydraulic Return Filter
Lube Point(s) - Replaceable Element
Interval - Change after first 50 hours and every 300 hours
thereafter or as indicated by condition indicator
6. Hydraulic Charge Filter
Lube Point(s) - Replaceable Element
Interval - Change after first 50 hours and every 300 hours
thereafter or as indicated by condition indicator.