JLG 600AJ Operation And Safety Manual page 127

SECTION 7 - GENERAL SPECIFICATIONS & OPERATOR MAINTENANCE
4. Wheel Drive Hub
Lube Point(s) - Level/Fill Plug
Capacity - 20 oz. (0.6 L)
Lube - EPGL
Interval - Check level every 3 months or 150 hrs of operation;
change every 2 years or 1200 hours of operation
7-20
5. Hydraulic Return Filter
Interval - Change after first 50 hrs. and every 6 months or
300 hrs. thereafter or as indicated by Condition Indicator.
31215030