National Crane
Published 5-27-2018 Control # 039-06
5-1
800D
SERVICE
SECTION 5
SERVICE
SECTION CONTENTS
Service and Repair . . . . . . . . . . . . . . . . . . . . . . . . . 5-1
Environmental Protection . . . . . . . . . . . . . . . . . . . 5-2
Cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Hydraulic Systems . . . . . . . . . . . . . . . . . . . . . . . . 5-2
Label Parts When Disassembling . . . . . . . . . . . . 5-3
Hydraulic Oil Recommendations. . . . . . . . . . . . . . 5-3
Draining and Flushing . . . . . . . . . . . . . . . . . . . . . . 5-3
Removing Air From the Hydraulic System . . . . . . 5-4
Welding Precautions . . . . . . . . . . . . . . . . . . . . . . . 5-4
National Crane Fitting O-ring Part Numbers . . . . . 5-4
Loctite®. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Fasteners and Torque Values . . . . . . . . . . . . . . . . 5-6
Trouble Diagnosis . . . . . . . . . . . . . . . . . . . . . . . . 5-26
Anti-two Block Trouble Diagnosis —
Electrical . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-29
Anti-two Block Trouble Diagnosis —
Hydraulic. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-31
Anti-two-block Internal Wire System/Four
Section Boom (Cable On Top Of Sections). . . . . 5-33
1/2 Stage Anti-two Block Wire Replacement . . . 5-33
Disassembly Of 1/2 Stage . . . . . . . . . . . . . . . . . . 5-33
2/3/4 Stage Anti-Two Block Wire Replacement . 5-35
Replacement Of Proportioning Cable For
1/2 Stage Of Anti-two Block Wire. . . . . . . . . . . . . 5-37
Anti-two-block Wire With External Reel . . . . . . . 5-42
SERVICE AND REPAIR
The information supplied in this section of the manual is
designed to assist you in service and repair of your National
Crane. Inspection, lubrication and general maintenance
information are found in two previous sections of this
manual. Before attempting to perform any service work, the
machine must be shut down as outlined under Maintenance
Procedure in the Maintenance section of this book.
Generally, a study of the hydraulic schematics in conjunction
with a systematic procedure to locate and correct the
problem will enable a skilled mechanic to determine the
problem and correct it. If at any time you cannot find or
correct the problem, contact your National Crane distributor
or Manitowoc Crane Care.
Be sure you have your parts
and service book, model number and serial number at
hand when you call
. This information is on the serial
number placard located on the crane frame.
The following general suggestions should be helpful in
analyzing and servicing your crane. Use the following
systematic approach should be helpful in finding and fixing
problems:
1.
Determine the problem.
2.
List possible causes.
3.
Devise checks.
4.
Conduct checks in a logical order to determine
the cause.
5.
Consider the remaining service life of
components against the cost of parts and labor
necessary to replace them.
6.
Make the necessary repair.
7.
Recheck to ensure that nothing has been
overlooked.
8.
Functionally test the new part in its system.
Note: Your safety and that of others is always the
number one consideration when working around
cranes. Safety is a matter of thoroughly understanding
the job to be done and the application of good common
Reference
Only
Содержание National Crane 800D
Страница 1: ...Operator and Service Manual National Crane 800D F o r R e f e r e n c e O n l y ...
Страница 4: ...F o r R e f e r e n c e O n l y ...
Страница 98: ...MAINTENANCE 800D 3 10 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 194: ...SPECIFICATIONS 800D 8 4 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 216: ...INSTALLATION 800D 9 22 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 232: ...CRANE INSTALLATION 800D 10 16 Published 5 27 2018 Control 039 06 THIS PAGE BLANK F o r R e f e r e n c e O n l y ...
Страница 252: ...SCHEMATICS 800D 2 Published 5 27 2018 Control 039 06 F o r R e f e r e n c e O n l y ...
Страница 255: ...F o r R e f e r e n c e O n l y ...
Страница 256: ...F o r R e f e r e n c e O n l y ...