Manitowoc Grove GRT8100 Service Manual

4-1
Published 3/26/2018, Control # 596-05
GRT8100 SERVICE MANUAL BOOM
4
GROVE
SECTION 4
BOOM
SECTION CONTENTS
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Boom Nose Sheaves . . . . . . . . . . . . . . . . . . . . . 4-28
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-29
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45
Functional Check . . . . . . . . . . . . . . . . . . . . . . . . 4-45
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45
Boom Alignment and Servicing. . . . . . . . . . . . . . 4-45
Boom Extension and Retraction Cable . . . . . . . 4-46
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-46
Cable Tensioning Check and Adjustment. . . . . . 4-46
Telescope Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . 4-49
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-49
Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . 4-49
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-50
Removal And Installation . . . . . . . . . . . . . . . . . . . 4-51
Disassembly And Assembly . . . . . . . . . . . . . . . . 4-51
Lift Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52
Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . 4-52
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-52
Lift Cylinder Removal. . . . . . . . . . . . . . . . . . . . . . 4-54
Lift Cylinder Installation . . . . . . . . . . . . . . . . . . . . 4-54
Hook Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-56
Adjusting Boom Extension Stowage Mounts . . . 4-57
DESCRIPTION
A five section 12 m to 47 m (39.4 ft to 154 ft), full power,
sequenced, and synchronized boom (Figure 4-1) is installed
on this crane.
The boom utilizes one telescope cylinder to extend and
retract Tele 1 and Tele 2, and a synchronized cable system to
extend and retract Tele 3 and 4. The telescoping boom
sections are supported on graphite impregnated nylatron
wear pads. Side wear pads prevent metal to metal contact
between the tele sections.
Boom assembly lift is provided by one lift cylinder. Boom
elevation is from -3° to 80°.
Two optional auxiliary boom nose are available for the boom
to simplify single part cable usage. The rooster sheave is
installed on the main boom nose and is secured by pins that
pass through the rooster sheave and main boom nose.
A 10.1 m to 17.07 m (33 ft to 56 ft) folding offsetable
swingaway boom extension is provided to obtain additional
boom reach. An optional insert is available for additional
reach.
The bi-fold boom extension mounts directly to the boom
nose utilizing a four point attachment. In addition, the bi-fold
extension base section and/or fly section can be stowed on
the right side of the boom base section.

Manitowoc Grove GRT8100 Specifications

General

Brand	Manitowoc
Model	Grove GRT8100
Category	Construction Equipment
Language	English