Manitowoc 1400A User Manual

National Crane 1-21-2019 Control # 104-07 4-1
1400A SERVICE MANUAL BOOM MAINTENANCE
4
SECTION 4
BOOM MAINTENANCE
SECTION CONTENTS
Four Section boom . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Boom Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Boom Disassembly. . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Boom Disassembly Alternative #1 . . . . . . . . . . . . 4-3
Boom Disassembly Alternative #2 . . . . . . . . . . . . 4-4
Additional Maintenance, Disassembled Boom . . . 4-4
Four Section Boom Assembly. . . . . . . . . . . . . . . . 4-4
Five Section Boom . . . . . . . . . . . . . . . . . . . . . . . . . 4-7
Internal Cable Sheave Lubrication . . . . . . . . . . . . 4-7
Five Section Boom Removal. . . . . . . . . . . . . . . . . 4-8
Five Section Boom Disassembly . . . . . . . . . . . . . 4-8
Additional Maintenance, Disassembled Boom . . . 4-9
Five Section Boom Assembly . . . . . . . . . . . . . . . 4-10
Boom Straightness . . . . . . . . . . . . . . . . . . . . . . . 4-13
Top/Rear Wear Pad Adjustment . . . . . . . . . . . . . 4-14
Wear Pad Inspection . . . . . . . . . . . . . . . . . . . . . . 4-14
Top Rear Pad Replacement . . . . . . . . . . . . . . . . 4-14
Front Bottom Pad Replacement . . . . . . . . . . . . . 4-14
Inner Side Pad Clearance . . . . . . . . . . . . . . . . . . 4-15
Inner Side Pad Clearance Example. . . . . . . . . . . 4-16
Cable Tensioning. . . . . . . . . . . . . . . . . . . . . . . . . . 4-17
Cable Tension Sequence . . . . . . . . . . . . . . . . . . 4-17
5 - Section Boom w/ 2 Stage Cylinder Cable
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
4- Section Boom w/ 2 Stage Cylinder Cable
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
4- Section Boom w/ 1 Stage Cylinder Cable
Positioning . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Cable Retention . . . . . . . . . . . . . . . . . . . . . . . . . . 4-22
FOUR SECTION BOOM
A two-stage double-acting telescope cylinder, is attached to
the 1
ST
, 2
ND
and 3
RD
boom sections. The telescope cylinder
supports and propels the 2
ND
and 3
RD
boom sections.
The 4
TH
section extend cables are attach to the base end of
the 2
ND
section boom, reeved around sheaves at the front on
the telescope cylinder, and attached to the base of the 4
TH
boom section.
The 4
TH
section retract cables are attached to the front of the
2
ND
boom section, reeved around sheaves at the back of the
3
RD
boom section, and attach to the back the 4
TH
boom
section.
The 3
RD
section retract cables are attached to the front of the
1
ST
boom section, reeved around sheaves at the back of the
2
ND
boom section, and attach to the back of the 3
RD
boom
section.
A proportioning cable is attached to the rear of the 1
ST
section, reeved around a sheave at the front of the 2
ND
section, and anchored to the rear of the 3
RD
section to
maintain proper cylinder extension proportion. Detailed
service and maintenance is required to insure smooth and
proper operation.
For information about cable tensioning, see “Cable
Tensioning” on page 4-17.
Fo
r
Reference
Only

Manitowoc 1400A Specifications

General

Brand	Manitowoc
Model	1400A
Category	Construction Equipment
Language	English