JLG 660SJ ANSI Service Manual - Manual (Page 84)

SECTION 3 - CHASSIS & TURNTABLE
3-30 – JLG Lift – 3120718
Bearing set/miscellaneous parts
Rotary group complete 9 pistons, cylinder sub-assembly,
valve plate (cw or ccw corresponding to the order) retain-
ing plate and retaining ball.
Swash Plate
Parts of the control device: control piston, piston rod,
plug, spring stopper max flow , hex. nut, and hex. head nut
Figure 3-19. 600S Drive Motor Cutaway