JLG 1500SJ Operation And Safety Manual page 196

SECTION 8 - GENERAL SPECIFICATIONS & OPERATOR MAINTENANCE
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
8-16
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.
– JLG Lift – 3121261