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Wet Stacking
The unit is powered by a diesel engine. Diesel engines
are susceptible to wet stacking if lightly loaded. Wet
stacking occurs when an engine is run at less than 30%
of its full load capacity, causing unburned fuel to
accumulate in the exhaust system. Wet stacking can be
detected by continuous black exhaust when the unit is
under a constant load. It can also cause fouling of
injectors and buildup on engine valves. Diesel engines
operate properly when applied loads are between 30%
and 100% capacity. Appropriate generator sizing is
determined by the anticipated load. If the unit is in a wet
stack condition, load the unit heavily for five hours or until
the exhaust is clear.
Voltage Regulator Option
The electronic voltage regulator controls the output of the
generator by regulating the current into the exciter field.
The
regulator
has
three
potentiometers that may be adjusted for voltage, stability
and voltage roll-off (U/F). The voltage regulator on your
unit is adjusted before shipment from the factory. Contact
Generac Mobile Products for additional information
before attempting to adjust the voltage regulator.
Engine Derating
All units are subject to derating for altitude and
temperature. Derating reduces the available power for
operating tools and accessories connected to the outlets.
For every increase in 1000 ft (305 m) of elevation, engine
performance for this unit typically drops between 2% and
4%. Also, engine performance decreases about 1% for
every 10ºF (5.6ºC) increase in ambient air temperature
over 72ºF (22ºC).
Shutting Down the Unit
Check with personnel using power supplied by the unit
and let them know the power is going to be turned off.
Make sure the power shutdown will not create any
hazards by accidentally turning off equipment that needs
to remain running (pumps, compressors, lights, etc.).
1. Remove all loads from the outlets.
2. See
Figure
3-9. Switch the individual circuit
breakers for each light OFF (O).
3. Switch the main circuit breaker OFF (O).
4. Turn the Control Power switch to the OFF (O)
position.
NOTE: For extended storage time, disconnect the
battery. For extended storage requirements, refer to the
engine operator's manual
Owner's Manual for MLT Light Tower
screwdriver
adjustable
I
I
O
O
Figure 3-9. Shutting Down the Unit
Lowering the Mast
WARNING
Burn hazard. Lamps become extremely hot
while in use. Allow 10–15 minutes for cooling
before handling or lowering mast. Touching a
hot lens or fixture can cause severe burns.
1. Shut down the lights and engine. See
Down the
Unit.
2. If the unit is going to be moved, it is recommended
that the mast is turned 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.
3. Turn upper mast winch handle counterclockwise to
collapse the mast to its lowest position. Verify the
coiled electrical cord does not get caught in, or
pinched by, the mast while it is being lowered.
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.
IMPORTANT NOTE: Contact a Generac Mobile
Products Authorized Service Dealer immediately if
the mast hangs up or the winch cable develops
slack.
4. Release the mast lock by pulling the safety pin on
the mast lock and pulling the lock bar free. Turn the
handle of the lower mast winch counterclockwise
until the mast rests in the transport cradle.
5. After the mast is completely down, insert the mast
cradle locking pin and secure it with the safety pin.
NOTE: Generac Mobile Products strongly recommends
that the lights be removed from the mast and stowed for
transportation.
See
Removing
Transportation.
Operation
OFF
GLOW
PLUG
I
I
O
O
(000278)
Shutting
(000265)
the
Lights
RUN
START
004550
for
19
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Table of Contents
Troubleshooting
