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Operating & Safety Instructions
I
nstall the balancer before using it. This operation is to be carried out by skilled
personnel who must comply with the directions outlined in this manual: a wrong
installation could cause injury/damage to people/property.
This manual contains important information that the user must adhere to in order
to use the balancer safely. Be sure to have clearly understood all the instructions
before using the balancer. Failure to do so could cause injury.
The balancer was built in conformity with European Community Directives that were
pertinent and applicable when the balancer was put on the market and that entail the
CE marking of the product.
Intended conditions of use
The balancers are designed to balance the weight of tools and utensils in general and
are to be used by one operator at a time. The balancer may be used in an assembly
line, in single workplaces. For professional use only.
Always operate, inspect and maintain this balancer in perfect working order in
accordance with all regulations pertinent to balancers, tools and workplaces.
Use contraindications
Do not use the balancer in environments with potentially explosive atmospheres.
Do not permit children or people under age to use the balancer.
Do not work, transit or linger underneath the balancer.
When using balancers, always fully and duly comply with the standards and laws in
force in the country in which they are used.
Chicago Pneumatic will not be held liable for any damage or problems caused by
customers using these balancers for any other application.
Choosing the balancer
Assess the total load to be balanced: tool, accessories and sections of hoses or
cables to be lifted by the balancer. The overall load to be balanced must fall within the
balancer's minimum and maximum load-bearing capacity.
Starting up the balancer
Assess the range of the work area and, if need be, hang the balancer on a carriage to
be able to use it properly in an area wide enough to carry out the required activities.
Use hole A for the main suspension and hole S for the safety suspension.
WARNING: refer to figure 1a for loads up to 4 kg(8.8 lb) otherwise refer to figure
1b for loads exceeding 4 kg(8.8 lb).
If screw fixing devices are used to install the balancer, use self-locking nuts, split-pins
or other safety systems.
Always connect the safety suspension S, using exclusively the supplied standard
fittings (Fig.1a/b), to a suitably sized support. The safety support MUST NOT
BE the same one used for the main suspension A (Fig.1a/b). If the main suspension
breaks, the max falling distance must not be more than 100 mm(3.94 in.). Tighten the
nuts of the clamp 21215 (Fig. 1) at a torque of 2 Nm(1.47 ft lb).
To avoid anomalous wear, the load must be applied vertically and in any case the cable
must be free to line up with the direction of the load.
Using the balancer
Grip the tool hanging from the balancer and carry out the required operations. Then
accompany the tool until it balances, on the vertical line of the balancer, and release it.
The load to be balanced must be hung on hook 24 (Fig.4). Ensure that the hook is
properly closed after having hung the load.
The cable must never unwind all the way: the work stroke must end at least 100
mm(3.94 in.) before the stroke's lower limit.
If need be, move and lock the clamp 20 (Fig.4) to stop the upward stroke.
When using the balancer, always don individual protective gear and closely adhere to
the prevailing accident prevention regulations.
It is strictly prohibited to:
- Abandon the load if it is not in a vertical position;
- Swing/throw the hanging load to another operator;
- Move the load by pulling the balancer's cable;
- Hang loads that are not within the upper and lower ranges of the admissible
load-bearing capacity;
- Hang more than one tool on the balancer.
The sole risk linked to the use of the balancer consists in any uncontrolled
rewinding of the cable. This very dangerous event will be avoided by adhering to
the following instructions:
- if you have any doubts concerning the working efficiency of the balancer,
BALANCER MAINTENANCE
This part of the manual is intended for maintenance personnel ONLY
CERTAIN OPERATIONS OUTLINED IN THIS SECTION ARE VERY
DANGEROUS AND COULD INJURE PEOPLE IF PERFORMED BY UNSKILLED
PERSONNEL.
REFER TO THE OPERATING MANUAL TO INSTALL, ADJUST AND USE THE
BALANCER.
Maintenance
The balancer's dimensioning is such that it is maintenance-free for its entire
work life. But if it is used under particularly harsh conditions and requires any
interventions, ensure that the spring-drum group (13) is unloaded before
disassembling the balancer. The spring is the balancer's only dangerous
component. It is housed inside the drum (13) that is lubricated for life. The spring-
drum spare part (13) is supplied complete: do not remove the spring for any
reason whatsoever.
Do not disassemble the spring group as this is a dangerous operation.
Replacing the cable.
Discharge the drum spring;
Remove the stop ring 11 and the washer 12;
Hold bush 6 in place, using a 30-mm wrench, widen the spring 9 and lift the spring
and the bush and then remove the plate 4;
Remove screws ABC and loosen screw D by a few millimeters, raise flange E and
replace the cable (15). Refit and tighten screws ABC and D.
Reassembly.
Repeat the foregoing operations in reverse order.
WARNING: before you position the drum into the cover, check that the slot of
cam 5 has been inserted into the matching pawl of lever 8 and that spring 7
is in place. As concerns models CP9946-CP9950 pay attention to the position
of the centrifugal masses X.
WARNING: in order to insert the drum into the cover, the cable must pass
BEFORE performing any kind of inspection be sure to hold up the hanging tool
to prevent it from falling and UNLOAD THE SPRING COMPLETELY;
- if for any reason whatsoever the balancer does not rewind the cable, DO NOT
do anything on your own initiative but contact the customer service at once;
- never release the load if the cable has not been fully wound in the drum;
- should you find the balancer with the cable unwound and no load applied to it,
DO NOT do anything on your own initiative but contact customer service at once.
Adjusting the balancer
To enable the balancer to balance heavier loads, use wrench D to turn the knob 6
counterclockwise, identified by symbol "+" as shown in the figure (Fig.2). For lighter
loads, press the end of the spring 9 (Fig.3) and turn it clockwise, identified by symbol "-"
as shown in the figure (Fig.3).
WARNING: DO NOT USE THE WRENCH ON KNOB 6 TO DECREASE THE LOAD!
(The latching system could break if you force the knob using the wrench in the load-
decreasing direction).
After having adjusted the load, check that the cable slides freely for its entire length:
the movement must not be restricted when the spring has wound all the way. Check the
stroke often and at different speeds.
ONLY FOR models CP9946-CP9950
Balancers CP9946-CP9950 are fitted with a mechanism that locks the rewinding of the
cable. This permits working without the cable traction, for instance inside a car (Fig. 7).
The locking is achieved through the slow upward movement of the tool.
In order to release the rotation of the drum, pull the tool slightly downwards but make it
go back up quickly.
In order to prevent undesired locking, it should go up at a suitable speed.
The locking kinematism may be neutralized by tightening the screw (25) all the way
while the load goes up and down (Fig. 6).
NOTE: should the balancer's capacity of supporting a hanging load decrease,
this could mean that the spring of the drum is about to break. DO NOT MODIFY
BALANCER ADJUSTMENT TO MAKE IT HOLD UP THE LOAD IN ALL CASES BUT
CONTACT SKILLED PERSONNEL IN CHARGE OF MAINTENANCE AT ONCE.
Safety devices
The balancer is fitted with a safety device that trips if the drum's spring breaks and
stops operations to prevent the hanging load from falling.
If you are unable to move the hanging tool up or down using moderate force, DO NOT
continue but contact our technical service at once.
NOTE: the balancer locks even if the drum spring is completely discharged. To
restore working efficiency, attempt to charge the spring as outlined in paragraph
"Adjusting the balancer". If the balancer does not
release, DO NOT do anything but contact the technical service at once.
INSPECTIONS AND MAINTENANCE
Maintenance may be carried out only by skilled and authorized personnel.
- The user must visually inspect the balancer on a regular basis (such as, for
instance, at each work shift) especially to check the state of suspensions A
and S (Fig. 1), the fixing screws and the self-locking systems (if used), and the
condition of the hooks and cable.
Should the cable have the defects shown in Fig.8, replace it immediately.
Do not make any modification to the cable unit and, specifically, DO NOT SHORTEN
the cable: if need, please get in touch with Chicago Pneumatic
- check that the cable's movement is smooth and that it does not make any
strange noises;
- do not lubricate the balancer with flammable or volatile fluids;
- do not remove any labels. Replace any damaged labels;
- the balancer must be inspected at least once a year by skilled, authorized
personnel.
Never disassemble the balancer. Maintenance is to be carried out only by skilled,
authorized personnel.
The balancer must be disposed of complying with prevailing rules and regulations at
the end of its work life.
Warranty
The use of non original Chicago Pneumatic spare parts will negatively affect safety and
performance and will, in any case, void the warranty.
through the specific notch G in the flange F.
WARNING: after having inserted the bush 6 into the plate 4, insert it into the
drum 13 by coupling the spring and then place everything inside the cover.
Hold bush 6 in place using a 30-mm wrench, widen the spring 9 and then
move down the bush 6 until it has entered the drum completely.
WARNING: if the greater diameter of bush 6 does not lower until it touches
plate 4, this means that bush 6 has not entered the drum's support: stretch
open spring 9 and oscillate the bush 6 until it is completely inserted.
Finish the assembly by inserting washer 12 and ring 11.
Drum spring breakage
If the balancer is locked, check that the drum's spring is not completely discharged
(this condition would trigger a locking as if the spring were broken); if you are
unable to charge the balancer complying with the procedure outlined in paragraph
"Adjusting the balancer", this means that the drum's spring is probably broken.
WARNING: before carrying out any type of check, make sure the spring is
discharged in actual fact.
WARNING - DANGER: never open the drum and/or attempt to replace the
spring for any reason whatsoever. This operation is extremely dangerous
and could cause very serious injury.
Carry out the procedure outlined in paragraph "Replacing the cable" to
disassemble the balancer and replace the
entire drum (the spring is NOT supplied as a separate spare part).
WARNING - DANGER: dispose of the drum containing the broken spring as
specified by prevailing laws and regulations. DO NOT abandon it or dispose
of it together with other types of waste and/or scrap because if it opens,
even by accident, it is VERY DANGEROUS and could cause serious damage
to anyone.
Use original Chicago Pneumatic spare parts only. When requesting spare
parts, the Customer should kindly contact the supplier of the balancer, or the
manufacturer directly, specifying the machine's identification data printed on the
plate.
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