Manitowoc National Crane 500E2 Service Manual

Published 08/16/19 Control # 112-05 1-21
500E2 SERVICE MANUAL INTRODUCTION
1
National Crane
WIRE ROPE
General
The following information includes inspection, replacement,
and maintenance guidelines for wire rope as established by
ANSI/ASME B30.5, federal regulations, and National Crane
specifications. The inspection interval shall be determined by
a qualified person and shall be based on expected rope life
as determined by experience, severity of environment,
percentage of capacity lifts, frequency of operation, and
exposure to shock loads. Periodic inspections need not be at
equal calendar intervals and should be performed at shorter
time intervals as the wire rope approaches the end of its
useful life. A periodic inspection shall be performed at least
once a year. The following information contains inspection
and maintenance procedures for wire ropes used on
National products as load lines, hoisting cables, boom
extension and retraction cables, pendant cables, and hook
block tie down cables.
Any deterioration observed in the wire rope should be noted
in the equipment inspection log and an assessment
concerning wire rope replacement should be made by a
qualified person.
Keeping Records
A signed and dated report of the wire rope’s condition at
each periodic inspection must be kept on file at all times. The
report must cover all inspection points listed in this section.
The information in the records can then be used to establish
data which can be used to determine when a wire rope
should be replaced.
It is recommended that the wire rope inspection program
include reports on the examination of wire rope removed
from service. This information can be used to establish a
relationship between visual inspection and the rope’s actual
internal condition at the time of removal from service.
TW =
Ta x L
L + A
Ta x L
L - A
or
Ta = Torque required (specified)
TW = Wrench scale reading or limit setting of
torque wrench
L = Length of torque wrench in inches (center of drive
tang to handle pivot pin or center of hand grip
extension handles are considered part of wrench
length, when used).
A = Length of adapter extensions in inches

Manitowoc National Crane 500E2 Specifications

General

Brand	Manitowoc
Model	National Crane 500E2
Category	Construction Equipment
Language	English