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Model D4070/D4077 Electric Hoist
-6-
Like all tools there is potential
danger when operating this tool.
Accidents can be caused by
lack of familiarity or failure to
pay attention. If normal safety
precautions are overlooked or
ignored, serious personal injury
may occur.
A dropped load can kill or
seriously injure people on the
ground. NEVER allow anyone to
walk underneath a hoisted load,
and ALWAYS verify the integrity
of how the lifting equipment is
attached to the hoist to prevent
accidentally dropping a load.
The Model D4070/D4077 electric hoist
has a safety stop microswitch that will
automatically shut OFF the motor before
the lift or pulley hook can be retracted
into the housing.
If the hook is allowed to retract into
the housing, the hoist will continue to
pull the cable until the cable or cable
hardware breaks, causing the load to
drop.
Test Operation
Figure 6. Hoist operation.
Cable
Down
Cable
Up
3. Let go of the hook and move to a safe
distance.
4. Use the control handle to fully retract
the cable.
– If the motor shuts OFF when the
cable stop compresses the spacing
rack (Figure 7), the safety stop
microswitch feature is working
correctly and the test run is
complete.
– If the motor does not shut OFF
when the cable stop compresses the
spacing rack, immediately release
the UP/DOWN switch. This safety
feature must work properly before
proceeding with regular operations.
Call Tech Support at (360) 734-3482
for assistance.
Figure 7. Safety stop mechanism.
Spacing Rack
Cable Stop
After mounting the hoist, the safety stop
microswitch must be tested before lifting
any loads.
To test the operation of the hoist:
1. Plug the electric hoist into a
grounded 110V outlet.
2. Grab the lift hook and pull it away
from the hoist while using the control
handle to lower the hoist cable a few
feet by pressing the switch downward
(see Figure 6).