Wet Stacking; Shutting Down The Unit; Lowering The Mast - Generac Power Systems MAGNUM MLT4060DOTM Owner's Manual

Operation
shipment from the factory. Contact Generac Mobile
Products LLC for additional information before attempting
to adjust the voltage regulator.

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.

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 receptacle panel.
2. See Figure 3-10. Switch the individual circuit
breakers for each light OFF (O).
3. Switch the main circuit breaker OFF (O).
4. Move the engine start switch to STOP.
NOTE: For extended storage time, disconnect the
battery. Refer to the engine operator's manual for
extended storage requirements.
I I
O O
Figure 3-10. Shutting Down the Unit
16
OFF
GLOW
PLUG
I I
O O
004550

Lowering the Mast

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
2. Turn the upper mast winch handle to collapse the
tower to its lowest position. Verify the electrical
cord returns to the storage tube properly.
3. Loosen the mast rotation knob and rotate the tower
so the mast mounted winches are aligned. The
white alignment arrow points should line up on the
mast sections and the metal stop tabs should be
touching. Tighten the mast rotation knob.
4. Turn the upper mast winch handle counter-
clockwise until all sections of the mast have been
lowered completely.
NOTE: Verify the mast coil does not get caught in or
pinched by the mast while it is being lowered.
5. Release the mast lock by pulling the safety pin on
the mast lock and pulling the lock free. Turn the
handle of the lower mast winch until the mast rests
in the cradle.
NOTE: If the mast lock does not pull free, operate the
lower winch slightly to relieve pressure on the mast lock.
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.
6. After the mast is completely down, insert the cradle
lock pin and secure it with the safety pin.
7. Position lights to aim at the ground. If the trailer is
RUN
going to be moved, Generac Mobile Products
strongly recommends that the lights be removed
START
from the mast and stowed for transportation. See
Removing the Lights for
IMPORTANT NOTE: Contact a Generac Mobile
Products Authorized Service Dealer immediately if
the mast hangs up or the winch cable develops
slack.
WARNING
Unit.
WARNING
Transportation.
Owner's Manual for MLT Light Tower
(000278)
Shutting
(000265)