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)
- Prestart Checklist
- Starting Unit—Analog Controls
- Starting Unit—Power Zone Controls (MANUAL Mode)
- Starting Unit—Power Zone Controls (AUTO Mode)
- Operating Lights—Analog Controls
- Operating Lights—Power Zone Controls (MANUAL Mode)
- Operating Lights—Power Zone Controls (AUTO Mode)
- Shutting Down Unit—Analog Controls
- Shutting Down Unit—Power Zone Controls (MANUAL Mode)
- Shutting Down Unit—Power Zone Controls (AUTO Mode)
- Automatic Shutdown
- Starting Utility Mode (If Equipped)—Analog Controls
- Starting Utility Mode (If Equipped—Power Zone Controls
- Stopping Utility Mode (If Equipped)—Analog Controls
- Stopping Utility Mode (If Equipped)—Power Zone Controls
- Dusk-to-Dawn Sensor (If Equipped)
- Customer Convenience Receptacles (If Equipped)
- Removing Loads from Receptacles (If Equipped)
- Storing the Unit
- Lowering the Mast—Manual Winch
- Lowering the Mast—Electric Winch (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
Owner’s Manual for Mobile Light Tower 37
Operation
Lowering the Mast—Electric
Winch (If Equipped)
NOTE: On key switch models, key must be in RUN to
operate electric winch.
1. Press and hold the upper winch control switch
downward to collapse the mast to its lowest
position. Verify the electrical cord does not get
caught in, or pinched by, the mast while it is being
lowered.
2. Shut down the engine. See Shutting Down Unit—
Analog Controls.
3. If the unit is going to be moved, rotate the mast so
the lights face the rear of the unit. To rotate the
mast:
a. Loosen the mast rotation knob.
b. Rotate the mast until the white arrows are
aligned and the metal stop tabs are touching.
c. Tighten the mast rotation knob.
NOTE: The electric winch models are equipped with a
safety limit switch. This switch disconnects power to the
winch after the mast is completely raised or lowered. This
prevents the cable from continuing to unwind and becom-
ing entangled around the winch drum.
IMPORTANT NOTE: Contact a GMASD immediately
if the mast hangs up or the winch cable develops
slack.
NOTE: If the light tower is not operational, and the
batteries do not have enough power to lower the mast, it
may be necessary to lower the mast manually. Always
attempt to recharge the batteries and lower the mast
electrically before proceeding.
Manually Lowering Electric Mast
IMPORTANT NOTE: Do not use this procedure
unless it is absolutely necessary. Frequent use of
this procedure could damage the motor shaft.
1. See Figure 3-61. Remove the motor cover (A).
Figure 3-61. Manually Lowering the Mast
2. Attach a drill chuck firmly to the exposed motor
shaft (B).
3. Using the drill, slowly rotate the motor shaft
counterclockwise to lower mast.
4. Detach the drill chuck and install the motor cover
after the mast is completely lowered.
Positive Air Shutdown (PAS)
(If Equipped)
See Figure 3-62. 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 3-62. 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
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)
002832
A
B
A
002535
B
C