Manitowoc Grove RT880E User Manual

Grove Published 11-10-2014, Control # 524-00 5-5
RT880E SERVICE MANUAL HOISTS AND COUNTERWEIGHT
5
HOIST TO BOOM ALIGNMENT
Preparation
Boom alignment must be completed before attempting hoist
alignment. If the hoist is not properly aligned, the cable can
be damaged or fine control could be affected.
The crane must be set on outriggers fully extended and the
crane must be leveled. The boom must be over the rear on
TM/TMS models and over the front on RT/Industrial models.
Tools Required
• Two foot square
• Mason cord
• Chalk
• Protractor
Procedure
The hoist mounting location will determine the alignment
procedure used. Shift one side of the hoist back or forward to
align the hoist with the boom sheave for cranes that have the
hoist mounted either directly to the boom or on a mount
attached to the boom. It may be necessary to shim under
one side of the hoist to make it level.
The hoist must be checked in two directions, one at 0 degree
and the other is above 45 degrees boom angle on any crane
that the hoist is not mounted directly to the boom, stationary
mounted.
Check the hoist at 0 degree to see if the hoist is aligned to
the boom nose sheave. The main hoist is aligned to the right
hand sheave and the auxiliary hoist is aligned to the center
sheave Figure 5-3.
NOTE: The hoist cable will have gaps in it during spooling
if the alignment is not correct.
NOTE: The hoist is not level if the cable is piling up on one
side of the drum.
1. The boom must be extended one half of full extension on
all hoist alignments. This length is used because when
the main hoist cable is positioned on the top right hand
boom nose sheave, the cable must leave the center of
the drum at a 90 degree angle. The boom has the ability
to extend, retract, and change the angle of departure
from the drum. Extend the boom half way to provide a
center point of adjustment to check the fleet angle of the
cable.
LOCATING CENTERLINE WITH
SQUARE
MAIN HOIST IS ALIGNED TO THE RIGHT HAND
SHEAVE
AUXILIARY HOIST IS ALIGNED TO THE CENTER
SHEAVE
FIGURE 5-3
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Manitowoc Grove RT880E Specifications

General

Brand	Manitowoc
Model	Grove RT880E
Category	Construction Equipment
Language	English