Engine Operation - JLG RT3394 Operation & Safety Manual

3.12.2 Arm Guards (If Equipped)
If the machine is equipped with electronic arm guards, the platform will stop lowering
at a predetermined height and the machine's beacons will flash at a different rate to
warn ground personnel. Machine lowering can continue after a three (3) second delay.
Once the lowering function is re-engaged an audible alarm will sound. After a one and a
half (1.5) second delay the platform will continue lowering.
3.12.3 Platform Extension
The machine is equipped with either single or dual deck extensions, which add 4 ft (1.2
m) to the front or rear of the platform, giving the operator better access to worksites.
To extend the deck, lift handle up on the right side of the platform (when facing deck
extension) to release the latch and use the handle to push the extension deck out.
When the deck reaches the end of its travel, push handle down to latch, this will lock
and hold the deck in place. To retract the deck, reverse operation. Maximum weight
capacity for each deck extension is 500 lb (227 kg).
Do not lower without completely retracting the platform extension.

3.13 ENGINE OPERATION

Note: When operating a machine at high altitudes, a decrease in machine perform-
ance may occur due to a decrease in air density.
When operating a machine at high ambient temperatures, a decrease in ma-
chine performance and an increase in engine coolant temperature may occur.
Contact JLG Customer Service for operation under abnormal conditions.
3.13.1 Starting Procedure
Note: Perform initial start-up from Ground Controls.
1. Check engine oil before attempting to start engine; if necessary, add oil (refer to
Operator Maintenance for details).
2. Pull out the red emergency stop switch (on).
3. Position the platform/ground select switch to the desired operating control
station (platform or ground).
RT3394, RT4394
Machine Controls, Indicators, and Operation
WARNING
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