4 — MAINTENANCE
Valve Operation
Refer to Figure 4-8 for valve locations and the hydraulic diagram in Figure 4-15. The
valves are labeled on the valve manifold as A, B, C, FA and FB. The platform down
valve is located at the base of the lift cylinder.
Steering Valve Right (A): Pressing the
ENABLE and the thumb steering switch to the
right energizes the steering valve, causing the steering cylinder to extend and execute a
right turn.
Steering Valve Left (B): Pressing the
ENABLE and the thumb steering switch to the left
energizes the steering valve, causing the steering cylinder to retract and execute a right
turn.
Lift Valve (C): Pressing the
ENABLE and UP pushbuttons energizes the platform lift
valve, causing the lift cylinder to extend.
Down Valve (D): Pressing the
ENABLE and DOWN pushbuttons energizes the platform
down valve. Oil flows back into the reservoir, causing the lift cylinder to retract.
Steering Speed Adjust Valve (FA): Adjust to control left turn – steering cylinder
retraction rate.
Steering Speed Adjust Valve (FB): Adjust to control right turn – steering cylinder
extension rate.
Figure 4-8. Valve Operation
4-9
