Manitowoc Grove GRT880 User Manual

Grove Published 3-25-2020, Control # 643-04 4-7
GRT880 OPERATOR MANUAL SET-UP AND INSTALLATION
4
Figure 4-10 shows methods for securing dead-ends of wire
ropes in a wedge socket assembly. While the loop-back
method (C, D, E) is acceptable, take care to prevent the loop
becoming entangled with tree branches and other
components during crane transport, or the anti-two block
system and other components during crane operation.
Of methods shown, Grove prefers method A or F be used on
Grove cranes, i.e., clipping a short piece of wire rope to the
dead-end or using a commercially available specialty clip (1)
or wedge (2). It is recommended the dead-end tail length be
a minimum of 6 rope diameters, but not less than 15.2 cm
(6 in) for standard 6 to 8 strand ropes and 20 rope diameters,
but not less than 15.2 cm (6 in) for rotation resistant wire
ropes.
When using method A, place a wire rope clip around the
dead end by clamping a short extra piece of rope to the rope
dead end. DO NOT CLAMP LIVE END. U-bolt should bear
against the dead end. Clip saddle should bear against the
short extra piece. Torque U-bolts to values listed in Table 4-1.
NOTE: Use of swivels is not allowed with non-rotation
resistant wire ropes.
Other sources for information with which crane users should
be familiar and follow is provided by the American Society of
Mechanical Engineers, American National Standard, ASME
B30.5, latest revised. ASME (formerly ANSI) B30.5 applies
to cableways, cranes, derricks, hoists, hooks, jacks, and
slings.
It states, in section 5-1.7.3, “(c) Swagged, compressed, or
wedge socket fittings shall be applied as recommended by
the rope, crane or fitting manufacturer.” Wire ropes are
addressed in ASME B30.5, section 5-1.7.2, ROPES, It
states, in pertinent part, “(a) The ropes shall be of a
construction recommended by the rope or crane
manufacturer, or person qualified for that service.” Additional
information is published by the Wire Rope Technical Board in
Wire Rope Users Manual, latest revision.
Table 4-1. Wire Rope Clip Torque Values
FIGURE 4-10
A
BC
D
EF
1
2
Clip Size Torque*
mm In Nm ft-lb
3.18 1/8 6 4.5
4.76 3/16 10 7.5
6.35 1/4 20 15
7.94 5/16 40 30
13.28 3/8 60 45
11.11 7/16 90 65
12.70 1/2 90 65
14.29 9/16 130 95
15.88 5/8 130 95
19.05 3/4 175 130
22.23 7/8 300 225
25.40 1 300 225
28.58 1-1/8 300 225
31.75 1-1/4 490 360
38.68 1-3/8 490 360
38.10 1-1/2 490 360
*Torque values are based on threads being clean, dry,
and free of lubrication.

Manitowoc Grove GRT880 Specifications

General

Brand	Manitowoc
Model	Grove GRT880
Category	Construction Equipment
Language	English