Manitowoc Grove GRT8100 User Manual

Grove Published 3-25-2020, Control # 595-10 4-7
GRT8100 OPERATOR MANUAL SET-UP AND INSTALLATION
4
INSTALLING WEDGE AND SOCKET
1. Inspect wedge and socket. Remove rough edges and
burrs.
2. Seize wire rope end using soft or annealed wire or
strand. If end of rope is welded, welded end should be
cut off. This allows distortion of the rope strands, caused
by the bend around the wedge, to adjust themselves at
the end of the line.
3. Make sure live end side (Figure 4-9) of rope is directly in
line with ears of socket and direction of pull to which the
rope will be subjected. If rope is loaded into socket
incorrectly, under a load the rope will bend as it leaves
the socket. The edge of the socket will wear into the rope
causing damage and eventual failure.
4. Insert wire rope end in socket, form a loop in the rope,
and route rope back through socket allowing the “dead”
end to protrude from the socket. Ensure dead end of the
rope is long enough to apply end treatment after wedge
is seated.
5. Insert wedge in loop. Pull live end of rope until wedge
and rope are snug inside socket. It is recommended
wedge be seated inside socket to properly secure the
wire rope using the crane’s hoist to first apply a light load
to the live line.
6. After final pin connections are made, increase loads
gradually until wedge is properly seated.
7. Wire rope and wedge must be properly secured inside
socket before placing crane into lifting service. It is the
wedge that secures the wire rope inside the socket. The
dead-end treatment is used to keep wedge from
becoming dislodged from socket should the rope
suddenly become unloaded from the overhaul ball or
hook block striking the ground, etc.
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.
Incorrect
Correct
Dead End
Live End
5337
FIGURE 4-9
FIGURE 4-10
A
BC
D
EF
1
2

Manitowoc Grove GRT8100 Specifications

General

Brand	Manitowoc
Model	Grove GRT8100
Category	Construction Equipment
Language	English