Manitowoc National Crane 500E2 Service Manual

National Crane Published 08/16/19 Control # 112-05 4-1
500E2 SERVICE MANUAL BOOM
4
SECTION 4
BOOM
SECTION CONTENTS
Three Section Boom Operation. . . . . . . . . . . . . . . 4-2
Special Boom Inspection . . . . . . . . . . . . . . . . . . . 4-2
Three Section Boom Maintenance . . . . . . . . . . . . 4-2
Three Section Cable Tensioning. . . . . . . . . . . . . . 4-2
Hoist Removal. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Boom Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Boom Disassembly . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Boom Disassembly Alternative #1 . . . . . . . . . . . . 4-4
Boom Disassembly Alternative #2 . . . . . . . . . . . . 4-5
Additional Maintenance, Disassembled Boom . . . 4-6
Three Section Boom Assembly. . . . . . . . . . . . . . . 4-6
Three Section Top/Bottom Pad Replacement
(Assembled Boom) . . . . . . . . . . . . . . . . . . . . . . . . 4-8
Top Rear Pad Replacement . . . . . . . . . . . . . . . . . 4-8
Front Bottom Pad Replacement . . . . . . . . . . . . . . 4-8
Inner Wear Pad Calibration . . . . . . . . . . . . . . . . . . 4-8
Cable Tensioning. . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Tensioning Setup Procedure . . . . . . . . . . . . . . . . 4-10
Cable Tension Sequence . . . . . . . . . . . . . . . . . . 4-10
3- Section Boom w/ 1 Stage Cylinder Cable
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Cable Retention . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Lift Cylinder Repair . . . . . . . . . . . . . . . . . . . . . . . 4-13
Lift Cylinder Disassembly . . . . . . . . . . . . . . . . . . 4-13
Extend Cylinder Repair . . . . . . . . . . . . . . . . . . . . . 4-14
Extend Cylinder Disassembly . . . . . . . . . . . . . . . 4-14
Extend Cylinder Assembly. . . . . . . . . . . . . . . . . . 4-15
Jib Installation and Adjustment . . . . . . . . . . . . . . 4-15
Jib Jack Service and Maintenance . . . . . . . . . . . 4-17
Adding Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Changing Oil . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Lubrication . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Rust Prevention . . . . . . . . . . . . . . . . . . . . . . . . . . 4-17

Manitowoc National Crane 500E2 Specifications

General

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