JLG T500J Service And Maintenance Manual page 109

The Drive Enable Valve sends oil to either the Main Valve Bank
for boom functions or the Drive Directional Valve. A filter,
check valve, priority flow valve, and relief valve are also
housed in this manifold block.
The left and right Drive Motors are attached to Friction Drive
Wheels. The Drive Engage Cylinder pushes the Drive Motor/
Friction Drive Wheel assembly against the trailer tires. The
drive motors can turn in either direction for steering and posi-
tioning the machine.
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SECTION 3 - CHASSIS & TURNTABLE
In order to use Drive & Set, the following conditions must be
met:
• The machine must be stowed
• Turntable position so basket is over tongue
• Telescoped fully in
• Boom not elevated
• Hand brake set
When driving, no boom functions are available.
To drive:
1. Satisfy position sensors
2. Turn Selector switch to drive or O/R set
3. Push the green enable button (no time limit to function
start)
4. Pull the Enable trigger
5. Joystick must be moved within 7 seconds (after 7 sec-
onds, begin with trigger switch again)
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