Manitowoc National Crane NBT40 Series, Service Manual

Page: 11 / 220

National Crane
Published 8-01-2017 Control # 287-11
1-1
NBT40 SERVICE MANUAL INTRODUCTION
1
10
SECTION 1
INTRODUCTION
SECTION CONTENTS
Supplemental Information . . . . . . . . . . . . . . . . . . . . . 1-1
Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Basic Nomenclature . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
General Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Removal and Installation . . . . . . . . . . . . . . . . . . . . . . 1-4
Disassembly And Assembly . . . . . . . . . . . . . . . . . . . 1-4
Pressing Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Locks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Shims. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4
Bearings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Gaskets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Hydraulic Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Fatigue Of Welded Structures . . . . . . . . . . . . . . . . . . 1-7
Loctite . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
Fasteners And Torque Values . . . . . . . . . . . . . . . . . .1-7
Weld Studs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-21
Hoist Cable Inspection and Maintenance . . . . . . . . .1-22
Hoist Rope . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22
Keeping Records. . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22
Wire Rope. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22
Environmental Conditions . . . . . . . . . . . . . . . . . . . . .1-22
Dynamic Shock Loads . . . . . . . . . . . . . . . . . . . . . . .1-22
Lubrication. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1-22
Recommendations for Servicing Wire Rope . . . . . . .1-23
Wire Rope Inspection . . . . . . . . . . . . . . . . . . . . . . . .1-23
Boom Extension and Retraction Cables . . . . . . . . . .1-24
Wire Rope Replacement (All Wire Rope) . . . . . . . . .1-24
Seizing Wire Rope . . . . . . . . . . . . . . . . . . . . . . . . . .1-25
GENERAL
This manual has been compiled to assist you in properly
operating and maintaining your Model
NBT40 Series
National Crane (Figure 1-1).
Before placing the crane in to service, all operators and
persons working around the crane must thoroughly read and
understand the contents of the Operators Manual. Before
moving a vehicle equipped with a crane, information relating
to transporting the vehicle must be read and observed.
This manual must be retained with the machine for use by
subsequent operating personnel.
Information this manual does not replace federal, state or
local regulations, safety codes or insurance requirements.
For detailed information concerning the operation and
maintenance of the RCL system installed on the crane, see
the manufacturer ’s manual supplied with the crane.
Manufacturers of rated capacity limiters may refer to them in
their manuals as a load moment indicator (LMI), a hydraulic
capacity alert system (HCAS), a safe load indicator (SLI), or
an ECS5; Manitowoc refers to these systems as a rated
capacity limiter (RCL) throughout its
Operator’s and Service
Manuals .)
The National Crane has been designed for maximum
performance with minimum maintenance. With proper care,
years of trouble-free service can be expected.
National Crane reserves the right to make specification and
equipment changes without notice because of product
improvements.
National Crane and our Distributor Network want to ensure
your satisfaction with our products and customer support.
Your local distributor is the best equipped and most
knowledgeable to assist you for parts, service, and warranty
issues. They have the facilities, parts, factory trained
personnel, and the information to assist you in a timely
mann er. We req uest that you first conta ct t hem for
assistance. If you feel you need factory assistance, please
ask the distributor’s service management to coordinate the
contact on your behalf.
Supplemental Information
Supplemental information for options such as remote
controls, augers, varying control configurations, baskets,
grapples, etc. is included in separate manuals.
Whenever a question arises regarding your National product
or this publication, please consult your National Distributor
for the latest information. Your National Distributor is
equipped with the proper tools, necessary National parts,
and trained service personnel to maintain and service your
crane.
Reference Only