Carl Stahl Kromer 7228 Serie Instrucciones De Uso página 35

Adjusting the Working Load
The zero gravity balancer has been preset at the factory to
the maximum load permissible for the type/model in questi-
on.
To adjust, hook the working load first, then apply a hexa-
gon-socket (Allen) wrench (6 mm) to the shaft (9). Hold the
wrench firmly, then press the shaft axially inwards as shown
in the illustration provided on the balancer. A force will now
act upon the wrench in the "-" direction of the shaft. Rotate
the wrench in the „+" or „-" direction as appropriate to
match the spring force to the suspended working load wit-
hin the balancer's load range (as specified on the rating pla-
te (1)). Thereafter, make sure that the shaft engages well,
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then remove the wrench.
Never slacken the spring to less than minimum load
as specified for the type/model used!
To set the maximum preload for the balancer, rotate the
shaft (9) "X" times in the "+" direction, starting with the fully
unloaded spring:
7228 - 01 x = 10
7228 - 02 x = 05
7228 - 03 x = 06
7228 - 04 x = 04
7228 - 05 x = 03
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Never tension the spring beyond the appropriate
maximum preload indicated above!
Adjusting the Cable Length
The zero gravity balancer comes with a long cable so the
cable length can be individually adjusted to on-site require-
ments. Adjusting the cable length is done with the cable
wedge (7). After lengthening or shortening the cable as
required, the free cable end must be compressed with the
supplied ferrule (8) (or with a clamp complying with DIN
3093, Parts 1 to 3); the projecting cable end must then be
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cut off flush.
A minimum distance of 100 mm must be maintained
between the cable clamp (6) and the cable wedge (7)!
Cable Stop Buffer
The cable stop buffer can be easily adjusted by simply
moving the elastic ball or stop buffer (5) and the cable
clamp (6) in the desired direction. Be sure to lock the clamp
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securely in place after each adjustment.
Never exceed the maximum permissible cable exten-
sion length (irrespective of whether the cable length
has been increased or not)!
Checks & Servicing
The zero gravity balancer must be serviced on a regular
basis. All external moving parts as well as the friction points
on the suspension and the spring hook must be regularly
greased. Cable care with a non-corrosive grease is recom-
mended, as this significantly increases the cable's useful
life. The suspension and the cable must be monitored conti-
nuously (as required by DIN 15020, Part 2). If damage is
detected (e.g. broken wires), replace the balancer immedia-
tely. Should the cable, the spring or other parts of your
balancer need to be replaced, our customer service depart-
ment has pre-assembled replacement sets available.
Maintenance & Repair
The following description refers exclusively to our pre-
assembled "Cable", "Spring", "Cable drum", "Housing" and
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"Suspension" replacement kits.
Be sure to use only genuine replacement parts!
When replacing any of the above-mentioned components,
be sure to follow the Operating Instructions supplied with
your balancer!
Replacing the Cable
This type of zero gravity balancer allows you to replace the
cable without releasing the spring tension or taking the
system apart.
The „Cable complete" replacement kit includes the cable
with the clamp already pressed in place on the cable coup-
ling, a separately included brass sleeve (slip-on collar), the
fully mounted cable stop buffer assembly (with rubber ball
and cable clamp), the pre-assembled cable socket with
wedge, and a loose ferrule that needs to be pressed in pla-
ce on the free cable end following cable length adjustment.
To replace the cable, pull it out of the housing as far as pos-
sible. (The cable coupling/mount is now visible in the ope-
ning above the mouth of the housing.) Block the cable drum
by inserting a steel pin (Æ 5 mm) into the bore located in the
cover of the balancer housing, then carefully release the
cable tension to enable the pin to enter the bore provided in
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the cable drum.
Ensure that the cable drum is securely locked! The
accidental release of the cable drum would cause
the unloaded cable to snap back, which may lead to
serious injuries and destroy the spring!
Slide the cable out of the drum and the housing by pushing
it upwards and remove the brass collar, then pull the cable
downwards and out of the balancer.
Insert a new cable from below by running it through the
mouth of the housing and the bore provided in the cable
drum (the so-called "tunnel") and then pushing it all the way
up until it exits the housing. Slip the collar over the cable
end and install it on the ferrule, then pull the cable fully
downwards into the bore of the drum (or "tunnel"). Be sure
to install the cable correctly – the cable with collar must
engage noticeably with the drum.
Hook the load and unlock the cable drum by pulling out the
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cable a little and removing the locking steel pin.
An incorrectly anchored cable may slip out under
load and cause damage!
Replacing the Spring
F
(A) Dismantling:
Retract the cable as far as it will go, then remove the wor-
king load and take the balancer off its suspension.
Now slacken the spring, proceeding as follows:
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