JLG T500J Service And Maintenance Manual page 171

NOTE: Make sure snap rings are seated in pin groove and closed
properly.
Correct
1. Install new 8-32 x 0.500 self-threading Torx head screw
in end of new aluminum round bar. Torque to 
18-20 in-lb (2-2.25 Nm).
3121200
Incorrect
SECTION 4 - BOOM & PLATFORM
2. Pull up on other end of round bar. Slide new poly roller
on bar.
4-23