JLG 1500SJ Service Manual - Manual (Page 66)

SECTION 3 - CHASSIS & TURNTABLE
3-18 – JLG Lift – 3121262
Figure 3-14. Hub Assembly
1= M18x1,5..........................Filling, draining and oil level plugs
2= 7/16" - 20 UNF - 2B..........Brake port