Manitowoc Grove GRT9165 User Manual

5-32 Published 7-23-2020, Control # 668-02
SET-UP AND INSTALLATION GRT9165 OPERATOR MANUAL
ANTI-TWO BLOCK (A2B) SWITCH
Two anti-block switches must be installed to allow crane
operation. If a single hoist rope has been reeved and two
A2B switches are installed, the unused A2B switch must be
locked (disabled) with A2B weight removed to allow all crane
operations.
Locking
1. Remove A2B weight.
2. (A) Remove cap (1) from switch.
3. Pull lanyard (2) down.
4. (B) Secure lanyard (2) in this position using cap (1). 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 down lanyard (2) and remove cap (1). Switch is
unlocked (enabled).
2. (B) Install cap (1) on A2B switch.
Checking Before Operation
Check the following electrical connections before operating
the crane to make sure the RCL system is properly
connected for the crane configuration.
Cranes With Main Hoist Only
If the crane is operated only with the boom and without boom
extension or lattice insert, no additional connections are
necessary. It must however be ensured that the A2B switch
weight is correctly mounted on the main boom hoist rope.
With even numbers of rope lines, the lifting limit switch
weight shall be attached to the “dead end” of the hoist rope.
With odd numbers of rope lines, the lifting limit switch weight
shall be attached to the rope line with the lowest operating
speed.
If the crane is operated with a main boom extension or lattice
insert, the connecting cable must be mounted between the
connector on the boom extension or lattice insert and the
connector on the main boom. The main boom A2B switch
weight must be disconnected and mounted on the extension
or fly section A2B switch.
DANGER
Two-Block Hazard!
To avoid death or serious injury, keep load handling
devices away from the tip of the boom or boom extension
when extending the boom and when hoisting up.
If the A2B switch is locked (disabled), the hook block
could hit the main boom head or extension. Never lock an
A2B switch when a hoist rope is installed to that
attachment.
FIGURE 5-20
8684-1
WARNING
Failure to reposition the A2B weight will prevent the A2B
system from functioning properly. No weight shall be
mounted on the A2B switch of the main boom when
working with the boom extension/lattice insert.
FIGURE 5-21
8684-2

Manitowoc Grove GRT9165 Specifications

General

Brand	Manitowoc
Model	Grove GRT9165
Category	Construction Equipment
Language	English