HOISTS MLC80A-1/MLC90A-1/MLC100A-1/MLC100-1 SERVICE/MAINTENANCE MANUAL
5-24
Published 10-09-2020, Control # 259-06
DRUM 1 AND 2 MINIMUM BAIL LIMIT
See Figure 5-17 for the following procedures.
The minimum bail limit stops the corresponding drum from
lowering when there are three to four wraps of wire rope
remaining on the drum.
When the limit is reached, the operating limit
fault is activated and the fault icon appears in
the fault bar of the Main Display Working
Screen.
• The drum can be operated in the hoist direction after the
limit is contacted.
• The limit can only be bypassed by disconnecting the
electric cable from the limit switch and connecting the
supplied shorting plug (4).
Pre-Adjustment
1. Pay out the wire rope from the desired Drum 1 or Drum 2
until there are three to four wraps of rope on the first
layer of the drum.
2. Lockout-tagout the crane.
Limit Switch Adjustment
1. Remove the cover (1) with gasket.
2. Turn the limit switch screw (2) until you hear the switch
activate.
3. Start the engine and check for proper operation.
Readjust the limit switch as needed.
4. Install the cover with a new gasket (if required).
WARNING
Falling Load Hazard!
When lowering a load below the minimum bail limit, do so
slowly with extreme caution. Do not lower the load to the
point where less than three full wraps of wire rope are on
the drum. The wire rope could be pulled out of the drum,
allowing the load to fall.
Item Description
1 Cover with Gasket
2Limit Switch Screw
3 Electric Cable
4 Shorting Plug
FIGURE 5-17
Drum 1 Shown
Drum 2 Similar