4VCB
When chain block is moved while hanging on the crane without
attached load, attention must be payed to equal chain strand
lengths. Hereby the brake should work in such a way that the
penta shaped wheel cannot be turned.
WARNING
When brake is working no load must be lifted.
This can lead to damages on the chain and at the
chain block. In addition to that this can lead to sudden
movement, which can cause dropping of the load.
The adjustment of the brake should be done with the thumb screw
on the outside (Pic. 2).
Use of thumb screw:
• Turning clockwise: Brake closes
• Turning anticlockwise: Brake opens
WARNING
The installed brake is only designed to x unloaded
chain strand. Attached loads cannot be hold with it in
a certain position.
3.6 Use of excavator hook*
At the installed hook (pic. 2) small loads (max. 200 kg) can be
attached. This can only be done, when no load is attached to the
ends of the chainblock.
HINT
Make sure that lifting of loads with the excavator hook
will not cause damages at the chain block.
* The Excavator hook is optional available for the size VCB-22.
4 Inspection / Repair / Disposal
4.1 Hints for periodical inspections
The operator has to determine and dictate the necessary inspec-
tion periods and the deadlines by a risk assessment (see sections
4.2 and 4.3).
The persisting appropriateness of the lifting mean must be checked
by a competent person (auditor) at least once per year.
Depending on the conditions of use e.g. frequent use, increased
wear or corrosion, it may be necessary to carry out inspections at
shorter intervals than once per year. A verication is also required
following damage and after special events.
4.2 Inspection criteria for the regularly
examination carried out by the operator
• Completeness of lifting mean
• Complete and readable WLL statement as well as
manufacturer´s sign
• Deformation at load bearing parts like swivel bolt, suspension,
penta-shaped wheel
• Mechanical damage like strong notches, especially in areas
where tensile stress occures.
• Easy and jerkfree turning of the swivel bolt must be given and
the penta-shaped wheel (with open brake) must be guaranteed.
If necessary lubricate the bearing of the swivel bolt by using
the funnel lubricator nipple (Picture 7).
Pic. 7: Funnel lubricator nippel
Funnel lubricator nippel
4.3 Additional inspection criteria for the
competent person resp. auditor
• Strong corrosion
• Cracks at load bearing parts
• Check if the locking of the swivel bolt is given
• The max. gap „S“ between swivel bolt and suspension must
not be exceeded (Picture 8):
VCB-16: S = max. 2.5 mm
VCB-22: S = max. 2.5 mm
VCB-28: S = max. 2 mm
Pic. 8: Max. gap „S“
S
• Reduction of cross section by more than > 10 %
HINT
When the max. gap „S“ (pic. 8) or the reduc-
tion of the cross section reaches >10 %,
the chain block must be taken out of service.
A repairing is not possible.
• Check bearing surface of the penta-shaped reversing wheel in
regard of sharp edges, etc.
• Check brake function
• Control of rest thickness of brake pads.
If thickness of the brake pads is less than 1mm, brakes pads
must be replaced.
Replacement of brake pads must only be carried out by a
competent person at RUD or by an authorized, specialized
RUD distributor.
>= 1 mm
thickness of brake pad
Pic. 9:
Thickness of brake pad
must be at least 1 mm
HINT
Welding must not be carried out at the chain block
at all.
