Manitowoc Grove GRT880

Grove Published 3-25-2020, Control # 643-04 4-1
GRT880 OPERATOR MANUAL SET-UP AND INSTALLATION
4
SECTION 4
SET-UP AND INSTALLATION
SECTION CONTENTS
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Hoist Platform . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-1
Working Position. . . . . . . . . . . . . . . . . . . . . . . . . . 4-2
Installing Cable On Hoist . . . . . . . . . . . . . . . . . . . . 4-2
Anti-Two-Block (A2B) Switch . . . . . . . . . . . . . . . . 4-3
Locking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Unlocking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-3
Checking Before Operation . . . . . . . . . . . . . . . . . 4-3
Cable Reeving . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-5
Reeving Boom Cable . . . . . . . . . . . . . . . . . . . . . . 4-5
Dead-End Rigging/Wedge Sockets . . . . . . . . . . . . 4-5
Installing Wedge and Socket . . . . . . . . . . . . . . . . 4-6
Bi-fold Swingaway, Off-settable Boom
Extension. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-11
Erecting Boom Extension . . . . . . . . . . . . . . . . . . 4-11
Erecting Boom Extension Fly Section . . . . . . . . . 4-13
Stowing Boom Extension. . . . . . . . . . . . . . . . . . . 4-13
Setting Boom Extension Manual Offset . . . . . . . . 4-16
Erecting and Stowing Bi-fold Boom
Extension with 6 m (20 ft) Insert . . . . . . . . . . . . . 4-19
Erecting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19
Stowing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Connecting and Disconnecting Boom
Extension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Connecting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Disconnecting . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-21
Removable Counterweight . . . . . . . . . . . . . . . . . 4-22
Counterweight Control Panel. . . . . . . . . . . . . . . . 4-22
Removing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
Installing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23
GENERAL
This section provides procedures for installing the hoist
cable on the hoist drum, cable reeving, and erecting and
stowing the boom extension.
HOIST PLATFORM
Travel Position
Refer to Figure 4-1.
1. Lower two hoist mirrors (1).
2. Remove two pins and lower rear rail (2). Reinsert pins.
3. Remove two pins and lower side rail (3). Reinsert pins.
4. Lift and slide steps (4) into retaining bracket. Pull out on
steps to make sure that notch is engaged in bracket.
DANGER
Do not use platform for hauling passengers. Death or
serious injury could occur.
No storage of components are allowed on the platform.
Only one person at a time is allowed on the platform.
FIGURE 4-1
8625
1
1
4
3
2