JLG 450A_AJ Series II Service Manual - Manual (Page 200)

SECTION 3 - CHASSIS & TURNTABLE
3-150 – JLG Lift – 3121180
Setting Actuator
1. Remove bolt from control linkage
2. With control linkage pushed against idle stop, begin
to make adjustments to actuator linkage in to align
bearing of spherical rod end with control linkage bolt
hole. When making linkage adjustments, thread
spherical rod end and threaded rod evenly (Turn
threaded rod for every turn of spherical rod end.)
NOTE: During this procedure it’s very important to keep
control linkage pushed against stop.
3. Once adjustments are made to align spherical rod
end bearing with control linkage bolt hole, lengthen
actuator linkage by continuing to turn spherical rod
end and threaded rod 2-2½ turns (1-1¼ turns of
spherical rod end and 1-1¼ turns of threaded rod.)
This will provide 1/8" (3 mm) preload.
4. Use a measuring device to ensure preload is
approximately 1/8" (3 mm), then secure actuator
linkage to control linkage with original bolt and nut.
Make sure spherical ball is seated in control linkage
bolt hole.
5. Tighten two nuts on threaded rod of actuator linkage
heads using two wrenches to prevent binding of
clevis.