7
Inspection and maintenance
80
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7.14.4
Replacing wire rope
YK/SK wire rope hoists have a special rope which is the optimum for the most common
applications.
WARNING
Hazard from unsuitable rope
The substitute rope must be equivalent to the original in terms of quality, strength and
make-up. Please consult the works certificate or the rope certificate to see which rope is
fitted.
➢
Always insert the rope correctly into the rope anchorage and secure. Replace split pin
every time it is dismantled
Fig. 89
Fig. 90
Fig. 91
Removing wire rope
1.
Lower bottom hook block to just above the lowest hook position and set it down on a
firm support.
2.
Release end of wire rope in rope anchorage (rope clamp with rope wedge).
3.
Run the remaining rope off the drum.
4.
Unscrew the fixing screws in the clamping plates on the rope drum.
Fitting rope
1.
Unroll new rope out straight if possible, without twists, kinks or loops. Protect rope
from dirt.
2.
Attach rope to rope drum with all the clamping plates (do not forget the lock
washers!). Allow the rope end to project by approx.
1.2-1.6 in.
3.
Tightly wind about 5-10 turns onto the drum under power. Let the rope run through a
greased rag. For type of grease see page 101.
4.
Fit rope guide (see page 81, section
7.14.5
“Fitting rope guide”
).
5.
Reeve the loose end of the rope according to the number of falls, fasten with the rope
wedge and secure with a rope clamp, see section
“Rope anchorage”
.
6.
Retighten clamping plates with the specified tightening torques (see following table):
Type
Metric size Tightening torque
[lb
f
ft
]
YKA/SKA
M6
7.4
M10
29.5
YKB/SKB
M10
37
YKC/SKC
M10
37
M12
64
YKE/SKE
M12
M16
64
155
Tab. 38
7.
Run rope in with partial load.
8.
WARNING
Safety hazard.
After fitting a new rope, or shortening the old one,
reset the hoist limit switch. See page 72,
“Setting emergency hoist limit switch”.
9.
Retract rope with partial load (see page 48, section
4.11 “Reeving rope”
).
10.
If the new rope twists after some time in operation, untwist the rope immediately
(see page 48, section
4.11
“Reeving rope”
and page 80,
“Removing rope”
).
