7
drops down after being lifted and then
released, turn worm clockwise until the
load/device starts rising.
b) Loosen set grub screws (13) and remove
all locking-bolts (49) while one person
holding the load/device by hand.
c) Remove the load/device from bottom hook
(42) when wire rope is fully retracted into
drum. Check the mass (weight) of the
removed load/device is within the capacity
range of the balancer.
d) Attach a weight, which has been confirmed
as the weight within the capacity range to
bottom hook (42) and adjust the spring
tension.
e) Move the load/device upward or downward
so that safety-lock pin (24) appears at the
inspection hole in the body cover (48) (see
Fig. 6/pos. 6).
f) Check safety-lock pin (24) does not project
out from the surface of nut (26). If it’s pro-
truding, lightly tap the top of the safety pin
with a bar having 6mm dia.
g) If the safety pin does not return, it has burrs
or the spring (19) is broken.
h) Remove nut (26) carefully from spring cas-
ing (20). Spring (25) will pop out when nut
(26) is removed, therefore, be careful not
to lose it.
i) Remove safety-lock pin (24) and check for
burrs. In some cases, it may be necessary
to replace the safety pin.
j) Check the hole if the spiral spring (19) is
broken. If yes, proceed with chapter
„SPRING REPLACEMENT AND
DISASSEMBLY“
.
k) Reassemble safety-lock pin (24) so that the
surface of nut (26) is even with casing (20).
l) Preventing nut (26) from loosening, make
a punch mark at 2 points on the thread
with a punch.
INSPECTION / MAINTENANCE
Inspections should be carried out by a com-
petent person prior to initial operation. The
accident prevention act is valid for the respec-
tive country where the product is used. And
also the commonly accepted regulations for
safe and professional work must be adhered
too.
The inspections are mainly visual and functio-
nal and shall establish that the components
of the unit are in perfect condition and do not
show signs of damage, wear, corrosion or other
irregularities. All safety devices are to be chek-
ked for completeness and effectiveness.
Repairs may only be carried out by a
specialist workshop that uses original
Yale spare parts.
The inspections have to be initiated by
the operating company.
Summary of Contents for YBF Series
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