HOISTS MLC80A-1/MLC90A-1/MLC100A-1/MLC100-1 SERVICE/MAINTENANCE MANUAL
5-28
Published 10-09-2020, Control # 259-06
ANTI TWO BLOCK (A2B) SWITCH
If a hoist rope has been reeved and two A2B switches are
installed, the unused A2B switch must be locked (disabled)
to allow all crane operations.
Locking
1. Remove A2B weight.
2. (A) Remove the cap (1) from switch.
3. Pull lanyard (2) down.
4. (B) Secure the lanyard (2) in this position using the cap
(1).The A2B switch is locked (disabled).
Unlocking
NOTE: Always remove the switch lock (enable) before
installing an A2B weight around the hoist rope.
1. (A) Pull the down lanyard (2) and remove the cap (1).
The switch is unlocked (enabled).
2. (B) Install the cap (1) on the A2B switch.
CAUTION
If the A2B switch is locked (disabled), the hook block
could hit the main boom head or extension, and hoist
rope. Never lock an A2B switch with a switch weight
attached.
To Next Page
Loading...
Need help?
General
