JLG 660SJ Operator Manual - Manual (Page 45)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3121205 – JLG Lift – 3-9
Platform Station
(See Figure 3-6., Platform Control Console - w/Drive Orientation)
1. Drive Speed/Torque Select
The machine has a three position switch - The forward
position gives maximum drive speed by shifting the
drive motors to minimum the displacement and giving
high engine when drive controller is moved. The back
position gives maximum torque for rough terrain and
climbing grades by shifting the wheel motors to maxi-
mum displacement and giving high engine speed when
drive controller is moved. The center position allows the
machine to be driven as quietly as possible by leaving
the engine at mid speed and the drive motors in maxi-
mum displacement.