Ingersoll Rand BMDLN4 Manual De Uso página 3

In order to avoid anomalous wear, the load must be applied vertically. The balancer must in any case be free to move in its suspension
so that it can line up with the direction of the load.
The balancer must be installed on a structure having an adequate mechanical resistance. Mechanical resistance of the structure >
5*(Balancer weight + Max load).
It is possible to install more than one balancer to the same main structure only if each balancer has an independent connection
point and the structure has a mechanical resistance higher than five (5) times the weight of all balancers plus all maximum loads.
It is possible to install more than one balancer to the same secondary structure (i.e. safety rope) only if each balancer has an
independent connection point and the structure has a mechanical resistance higher than five (5) times the weight of all balancers
plus all maximum loads.
When starting up a balancer, we suggest that the following procedure is used:
- Connect the balancer to the main structure through the suspension hook, if present, or fixing hole.
- Connect the safety device to the secondary structure.
- Lift the load to be hanged to the balancer.
- Hang the load to the balancer through the proper hook/snap hook.
- Lower the load by unwinding the balancer's rope and adjust the stroke limiter clamp to avoid bringing the load above the operator.
- Momentarily remove the red cap from the load adjustment bush.
- Adjust the balancer strength as long as the hanged load is balanced. Rotate in the direction of the + sign to increase the strength
of the balancer. Rotate in the direction of the – sign to decrease the strength of the balancer.
- After making the adjustment, the red cap must be fitted back onto the washer.
In case of installation of the balancer at a considerable height, use the dedicated extension ropes to bring the load at the needed
working height (the load must not be above the operator).
Ensure that the working area is adequately lightened to allow a good overview of the operations and of all the equipment, avoiding
dark areas, dazzling and strobe effects.
For all balancers that do not have a suspension hook, make sure that it is fixed to the main structure in such
a way as not to block the movements (oscillations and rotations) which are functional to the correct operation
of the balancer itself.
Always connect the safety suspension (S), with exclusive use of 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. Let the parts of rope that are not under tension
come out for at least 20 mm and tight the nuts of clamps 21215 (fig. 1) gradually together with a 2 Nm torque.
B A
AlAncer DjUstMent
A bushing was added to the balancer in order to safeguard its integrity from incorrect use when unloading the spring. This bushing
makes it impossible to unload the spring using a wrench. The only way to unload it is through an appropriate lever foreseen by the
instruction manual.
To allow the balancer to balance heavier loads within the load capacity accepted, use spanner (D) to turn knob (6) anticlockwise,
identified by the "+" symbol (Fig.2). For lighter loads, press on the end of the spring (9) and turn it clockwise, identified by the "-"
symbol (Fig.3).
TO REDUCE THE LOAD DO NOT USE THE SPANNER ON THE KNOB (6)! (forcing the knob in the load reduction
direction using the spanner can cause the retaining unit to break).
After adjusting the load, check that the rope can move freely along all its length: the movement must not be limited by the complete
winding of the spring. Check the stroke more than once and according to different speeds.
FOR BMDLLN4÷BMDLN12Y MODELS ONLY
The BMDLLN4÷BMDLN12Y balancers are fitted with a mechanism that allows to block cable rewinding; this allows to work without
cable traction, e.g. inside a car (Fig.5).
Blocking is obtained with slow re-ascent of the tool.
To release drum rotation, pull the tool slightly downwards and make it re-ascend at high speed.
To prevent undesired blocking, the ascent must take place at suitable speed.
The locking kinematism may be neutralized by tightening the screw (25) all the way while the load goes up and down (Fig. 5).
NOTE: a reduction of the ability of the balancer to hold the hanging load might mean that the drum spring is about to break. DO NOT
MODIFY THE BALANCER ADJUSTMENT TO SUSTAIN THE LOAD ANYHOW, INSTEAD CALL IMMEDIATELY THE SPECIALIZED
PERSONNEL AUTHORIZED TO MAINTENANCE.
Do not use by hanging a maximum load greater than the maximum load allowed and by balancing the same through the regulator.
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