Instructions / Assembly

11
Do not modify the plug – if it will not fit the outlet,
have the proper outlet installed by a qualified
electrician.
Improper connection of the equipment-grounding
conductor can result in a risk of electric shock. The
conductor with insulation having an outer surface
that is green with or without yellow stripes is the
equipment-grounding connector.
If repair or replacement of the electric cord or plug
is necessary, do not connect the equipment-
grounding conductor to a live terminal.
Check with a qualified electrician or service
personnel if the grounding instructions are not
completely understood, or if in doubt as to whether
the tool is properly grounded.
Repair or replace damaged or worn cord
immediately.
10.2 Inspecting hoist motion
1. Before closing circuit breaker and testing hoist,
check that wiring has been complete. If hoist
cannot be observed when circuit breaker is
closed, station an observer within sight of hoist
to report any movement when power is applied.
Be prepared to disconnect power if hoist motor
starts when power is applied – the hoist must
remain motionless when power is applied. Find
and correct any problems before continuing.
2. With no load on load hook, press UP button very
briefly and observe hoist action. The hook
should move upward.
3. On hoists with 3-Phase power supply, if the
hook moves in opposite direction to that shown
on control button, or if no motion occurs when
UP button is pressed, then the power supply
wires are incorrectly positioned.
Disconnect hoist from power, and switch any
two of the three supply wires at the power
source (excluding the ground wire). Do not
attempt to rewire the hoist circuit or pendant
controls for this problem. Use the same
safety precautions when reversing two of the
supply wires as was used when the wires were
originally connected.
4. Reconnect power and test hoist movement
again without load. Run hoist to maximum lifting
height to ensure limiter devices are operating
properly.
11.0 Pre-operation inspection
11.1 Inspecting load chain
Clean chain with non-acidic solution, and carefully
inspect entire load chain. Replace damaged chain
before using hoist. See section 16.2 for maximum
pitch allowed for chain length. If the chain exceeds
this amount, it must be replaced.
Also replace the load chain if any of the following are
identified:
1. Seriously rusted or cracked.
2. Marks on the chain surface are deeper than 5%
of the link’s diameter.
3. Links are twisted or deformed.
4. Links are stretched too long or considerably
worn on the surface, especially at points where
links contact each other.
Never extend load chain by welding a second piece
to the original.
Do not operate hoist with
twisted, kinked or damaged load chain. Do not
splice load chain.
Check that chain does not twist along its length from
hoist to hook (Figure 11-1). If twist is present on
units with multiple falls, the hook has been capsized;
it must be passed back through the chain loop to
remove all twist in the chain. See Figure 11-2.
Figure 11-1
Figure 11-2
The load chain supplied with
your JET chain hoist is designed, manufactured,
and tested for proper fit and durability. Over a
period of time, the chain may need to be
replaced. For your own safety, use factory
replacement chain only. Use of other than
factory replacement chain may cause serious
injury and/or damage to hoist.
A light coat of 30W oil applied periodically to the
chain will create easier operation and prolong chain
life.
11.2 Inspecting hooks
It is important to check top and bottom hooks for
proper opening and other signs of deformation or
damage. Replace a hook immediately if any of the
following problems are identified: