Section 4; Description; Theory Of Operation; Boom Extension - Manitowoc Grove TMS700E Service And Maintenance Manual

TMS700E SERVICE MANUAL
SECTION CONTENTS

Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Theory of Operation . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Boom Extension . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1

Boom Retraction . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-4
Boom Nose Sheaves . . . . . . . . . . . . . . . . . . . . . . 4-9
Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-9
Installation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-12
Functional Check . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-13
Boom Alignment and Servicing. . . . . . . . . . . . . . 4-13
Cam Operated Check Valve Adjustment . . . . . . 4-14
Guide Block Adjustment . . . . . . . . . . . . . . . . . . . 4-14
Boom Extension and Retraction Cable . . . . . . . 4-14
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-14
DESCRIPTION
A four section 10.84 to 33.5 m (35.6 to 110 ft), full power,
sequenced, and synchronized boom is installed on this
crane.
The boom utilizes two telescope cylinders to extend and
retract Section 2 and Section 3 with a synchronized cable
system to extend and retract Section 4. The telescoping
sections are supported on graphite impregnated nylatron
wear pads. Side wear pads prevent metal to metal contact
between the sections.
Boom assembly lift is provided by one lift cylinder. The lift
cylinder has a 30.48 cm (12 in) bore. Boom elevation is from
-3 to 78 degrees.
An optional auxiliary boom nose (rooster sheave) is 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 9.75 m (32 ft) fixed offsetable or a 9.75 to 17.07 m (32 to
56 ft) folding offsetable swingaway boom extension is
provided to obtain additional boom reach. A 6.1 m (20 ft) and
Grove

SECTION 4

BOOM
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Telescope Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-15
Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . 4-16
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-16
Removal and Installation . . . . . . . . . . . . . . . . . . . 4-18
Disassembly and Assembly. . . . . . . . . . . . . . . . . 4-18
Lift Circuit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18
Theory of Operation. . . . . . . . . . . . . . . . . . . . . . . 4-19
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20
Swingaway Boom Extension . . . . . . . . . . . . . . . . 4-24
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24
Boom Extension Alignment Device Adjustment 4-31
Hook Block. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
Maintenance . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-32
a 12.2 m (40 ft) lattice insert are also available for use
between the boom nose and the swingaway.
The boom extension mounts directly to the boom nose
utilizing a four point attachment. In addition, the swingaway
can be stowed on the right side of boom Section 1.
THEORY OF OPERATION
Boom Extension
Boom extension and retraction is accomplished with two
telescope cylinders, four extension cables, and two
retraction cables. The lower telescope cylinder rod is
secured to the rear of the boom Section 1 and the barrel is
secured to Section 2 boom section by a trunnion. The upper
telescope cylinder rod is secured to the rear of Section 2
boom section and the barrel is secured to the Section 3
boom section by a trunnion. The extension cables are
secured to the back of Section 4 and run around extension
sheaves on the front of the upper telescope cylinder to the
rear of Section 2.
The hydraulic fluid in both lower and upper telescope
cylinders is routed through the rods so that the barrels can
extend. There are two cam operated check valves which
Published 01-29-2015, Control # 512-01
BOOM
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4-1