Product Manual
Table Of Contents
- Section 1: Introduction and Safety
- Section 2: General Information
- Section 3: Operation
- Unit Setup
- Raising the Mast—Manual Winch
- Raising the Mast—Electric Winch (If Equipped)
- Raising the Mast—Power Zone- DLA (If Equipped)
- Prestart Checklist
- Starting the Unit (Key Switch Models)
- Preparing for Start-Up (Power Zone–DLA)
- Manually Starting the Unit
- Light Operation (Key Switch Models)
- Light Operation (Power Zone– DLA) (If Equipped)
- Engine Derating
- Wet Stacking
- Dusk to Dawn Sensor (Power Zone–DLA) (If Equipped)
- Customer Convenience Receptacles
- Shutting Down the Unit
- Shutting Down the Unit (Power Zone–DLA) (If Equipped)
- Lowering the Mast—Manual Winch
- Lowering the Mast—Electric Winch (If Equipped)
- Lowering the Mast—Power Zone- DLA (If Equipped)
- Positive Air Shutdown (PAS) (If Equipped)
- Lower Radiator Hose Heater (If Equipped)
- Tandem Tow (If Equipped)
- Telemetry (If Equipped)
- Spark Arrester (If Equipped)
- Heated Fuel Filter (If Equipped)
- Towing the Unit
- Lifting the Unit
- Tying Down the Unit
- Section 4: Maintenance
- Section 5: Troubleshooting
- Section 6: Wiring Diagrams
- Mast Junction Box Wiring and Light Connections
- AC Wiring—MLT6SKDS
- AC Wiring—MLT6SMDS
- AC Wiring—MLT6SMDS With Power Zone (If Equipped)
- AC Wiring—MLT6SKDS With Power Zone (If Equipped)
- DC Wiring—MLT6SMDS
- DC Wiring—MLT6SMDS With Power Zone (If Equipped)
- DC Wiring—MLT6SKDS
- DC Wiring—MLT6SKDS with Power Zone (If Equipped)
- DC Wiring—Heated Fuel Filter (If Equipped)—MLT6SMDS
- DC Wiring—Heated Fuel Filter (If Equipped)—MLT6SKDS
- DC Wiring—Electric Winch (If Equipped) with Standard Controller
- Trailer Lights
- DC Wiring—Electric Winch with Power Zone Controller (If Equipped)
Owner’s Manual for Mobile Light Tower 31
Operation
.
IMPORTANT NOTE: Contact a GMASD immediately
if the mast hangs up or the winch cable develops
slack.
5. If the unit is going to be moved, rotate the mast so
the lights face the rear of the unit. See Raising the
Mast—Manual Winch.
Positive Air Shutdown (PAS)
(If Equipped)
See Figure 3-18. This unit may be equipped with a
positive air shutdown (A) on the air intake. The PAS
system automatically stops the engine if an overspeed is
detected. Engine overspeed can occur if the atmosphere
contains elevated levels of combustible propane or
natural gas.
Figure 3-18. Positive Air Shutdown
The PAS system stops the engine by closing an internal
valve and obstructing intake air. Shutdown is triggered
automatically by an output from the controller or manually
by pulling the T-handle (B).
The reset knob (C) rotates 90° to block airflow. If the knob
is parallel to the pipe centerline (as shown), the valve is
open. If the knob is perpendicular to the pipe centerline,
the valve is closed and airflow is blocked.
Test the PAS
Test the PAS at least once a month to ensure optimal
valve performance. There are two methods:
1. Pull the T-handle. (NOTE: The valve must be open
before testing.)
2. Press the emergency stop button.
Testing the PAS triggers an actuator, closing the butterfly
valve inside the valve body. An audible click can be
heard when the actuator engages. Confirm that the valve
is closed by verifying that the knob has rotated perpen-
dicular to the pipe centerline. If valve does not close, con-
tact Generac Mobile Technical Support.
Reset the PAS
IMPORTANT NOTE: Before resetting the PAS, turn
the control power switch OFF (O). This will prevent
unexpected engine start-up during the procedure.
1. Rotate the reset knob and hold it in place while
pulling the T-handle until reset knob rotates coun-
terclockwise into plunger detent. An audible “click”
indicates the reset knob has seated properly.
2. Verify that the reset knob is parallel to the intake
pipe centerline.
3. Release T-handle, and then release reset knob.
The reset knob should remain parallel to the intake
pipe centerline.
Lower Radiator Hose Heater
(If Equipped)
The lower radiator hose heater is designed to prevent
engine coolant from freezing in extreme cold weather
conditions. While the heater is designed to be operated
overnight if necessary, 2–5 hours of heating just prior to
starting is usually sufficient for proper engine starting.
NOTE: Use the lower radiator hose heater only in its
designated location. Incorrect use can damage the
engine.
Proceed as follows when operating a unit equipped with
a lower radiator hose heater.
1. Verify the unit is level to maintain correct orienta-
tion of the heater while it is in operation.
2. Verify the cooling system is full of the correct
mixture of water and engine coolant before each
heater use.
3. Use only an undamaged, outdoor rated, three-
prong grounded 120VAC extension cord with a
minimum amperage rating of 10A. Connect the
cord to a properly grounded 120VAC GFCI outlet.
4. Before starting the engine, unplug the extension
cord from the power first, then unplug the heater
cord set from the extension cord.
Tandem Tow (If Equipped)
See Figure 3-19. The tandem tow hitch option (A) allows
the operator to tow a second MLT6 Light Tower in series
behind the unit equipped with the hitch.
IMPORTANT NOTE: Never tow more than two units
at once.
• Connect any trailer wiring to the unit in front (B).
Inspect for proper operation of the directional and
brake lights.
WARNING
Personal Injury. Stop immediately if the mast hangs
up or the winch cable develops slack. Excess slack
could cause the mast to collapse, resulting in personal
injury or equipment damage.
(000265)
A
002535
B
C