General Information; Warnings - PSR PAT ANTI-TWO-BLOCK Installation, Operator’s & Troubleshooting Manual

GENERAL INFORMATION

1
1. GENERAL INFORMATION
The PAT Anti–Two-block System has been designed to warn the crane operator of a two-blocking
condition of the crane. If a two-blocking condition is approached, the system will warn the operator by
sounding an audible alarm, lighting a warning light and locking out those functions which may
aggravate the crane's condition, whenever applicable.
NOTE: The term "two-block" is a crane term that refers to a condition when the load handling device
comes in contact with the boom head. This condition, if not prevented, may cause the wire rope to
break, allowing the load to fall. Either raising the load into the boom head, or telescoping the boom
without paying out hoist line can cause a "two- block" condition.

2. WARNINGS

The PAT Anti-Two- Block System is an operational aid, which warns a crane operator of approaching
two-block conditions, which could cause damage to equipment and personal injury.
This device is not, and shall not be a substitute for good, sound operator judgment, experience and
use of accepted safe crane operating procedures.
The responsibility for the safe operation of the crane remains with the crane operator who shall ensure
that all warnings and instructions supplied are fully understood and observed.
Prior to operating the crane, the operator must carefully and thoroughly read and understand the
information in this manual to ensure that he or she knows the operation and limitations of the system
and the crane.
Proper functioning is dependent upon proper daily inspection and observations of the operating
instructions set forth in this manual. Refer to Section 4 of this manual.