Manitowoc Grove GRT8120, Operator'S Manual

Page: 56 / 448

SAFETY INFORMATION GRT8120 OPERATOR MANUAL
2-32
Published 3-22-2021, Control # 702-02
When using a wedge socket
• Always inspect socket, wedge, and pin for correct size
and condition.
• Do not use parts that are damaged, cracked, or
modified.
• Assemble the wedge socket with live end of rope aligned
with the centerline of pin. and assure proper length of tail
(dead end) protrudes beyond the socket.
Sheaves
Inspect the boom nose and hook block sheaves for proper
operation, excessive wear, and damage every 50 hours or
weekly. Inoperable, damaged and/or worn sheaves cause
rapid deterioration of rope.
Make sure that sheaves carrying ropes, that can be
momentarily unloaded, are equipped with close fitting guards
or other devices to guide the rope back into the groove when
the load is reapplied. Make sure that sheaves in the lower
load block are equipped with close fitting guards that will
prevent the ropes from becoming fouled when the block is
lying on the ground with loose ropes.
To attain maximum hoist rope life and minimize hook block
rotation, it is recommended that even numbers of parts-of-
line be used in multiple-part reeving whenever possible.
The use of nylon (polyamide) sheaves, as compared with
metallic sheaves, may change the replacement criteria of
rotation-resistant hoist rope.
NOTE: The use of cast nylon (polyamide) sheaves will
substantially increase the service life of rope.
However, conventional rope retirement criteria
based only upon visible wire breaks may prove
inadequate in predicting rope failure. The user of
cast nylon sheaves is therefore cautioned that a
retirement criteria should be established based
upon the user’s experience and the demands of his
application.
Batteries
Battery electrolyte must not be allowed to contact the skin or
eyes. If this occurs, flush the contacted area with water and
consult a doctor immediately.
When checking and maintaining batteries, exercise the
following procedures and precautions:
• Wear safety glasses when servicing batteries.
• If equipped, disconnect battery with the battery
disconnect switch before disconnecting the ground
battery cable. For cranes with a Cummins engine using
an engine ECM:
a. Make sure that the key switch has been off for
2 minutes.
b. Turn the battery disconnect switch to the OFF
position.
c. Remove the ECM power fuse.
d. Remove negative battery cables.
• Do not break a live circuit at the battery terminal.
Disconnect the ground battery cable first when removing
a battery and connect it last when installing a battery.
• Do not short across the battery posts to check charge.
Short circuit, spark, or flame could cause battery
explosion.
• If applicable, maintain battery electrolyte at the proper
level. Check the electrolyte with a flashlight.
• If applicable to your crane, check battery test indicator
on maintenance-free batteries.
• Check battery condition only with proper test equipment.
Batteries shall not be charged except in an open, well-
ventilated area that is free of flame, smoking, sparks,
and fire.
Super Capacitor (If Equipped)
Capacitor electrolyte must not be allowed to contact the skin
or eyes. If this occurs, flush the contacted area with water
and consult a doctor immediately.
When checking and maintaining capacitor, exercise the
following procedures and precautions:
• Wear safety glasses when servicing.
• If equipped, disconnect battery with the battery
disconnect switch before disconnecting the ground
battery cable. For cranes with a Cummins engine using
an engine ECM:
1. Make sure that the key switch has been off for
2 minutes.
2. Turn the battery disconnect switch to the OFF position.
FIGURE 2-7