BGU FSW 4.5 M, Original Instruction Manual

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Seite 11
Even at consistent power ratings, the pull force of the winch still depends on the length of the remaining
rope spooled onto the drum. The maximum pull force is obtained with the first rope coils on the drum. The
pull force decreases as the rope winds up on the drum. The skidding speed is inversely proprotional to
the pull force and reaches the peak speed as the rope is fully spooled onto the drum.
The rated pull force is the largest force produced as the rope starts winding up onto the drum.
This is also the figure that is shown in the technical data reported on the product identification
label on the winch. The pull force of the winch decreases as the rope keeps winding further more
onto the drum. At fully wounded rope the pull force of the winch amounts 50-60% of the rated
force.
5.6 Settings
5.6.1 Clutch
1 on
0 off
Proper clutch settings will ensure optimum pull force. The clutch is set by the manufacturer during final
testing of the product before shipment. However, possible ongoign wear of the lining may require some
extent of adjustment as time passes.
For clutch adjustment attach a torque wrench to the green line. If you don’t have any torque wrench avai-
lable you can also use a spring balance of sufficient measuring scale.
Attach the torque wrench (or scale), apply a 350 N (35 kg) force to the line (Pos. 5, Fig. 8) and make sure
that the clutch slowly shifts towards the winch frame as you apply the force and stops moving when hitting
against the winch. If the force applied is too small, tighten the nut (Pos. 9, Fig. 8) by turning it clockwise
and making sure that as you do this the clutch lever gradually shifts towards the winch frame and stops
there. Keep tightening untill the required force is reached that is till the lever 6 backs aways from the
winch. Finally slightly turn the nut anti-clockwise to release it a litlle bit. Now the clutch is set and ready to
work.
Each winch is factory set at the maximum pull force shown on the product identification label. It
is strictly forbidden and very dangerous to achieve higher settings and run the winch at higher
force ratings!
5.6.2 Prebrake regulation
To facilitate winding of the wire rope, perform prebrake regulation with the screw (10) and respective
wingnut (11) (Fig. 8). Exact prebrake regulation will also prevent the rope from unwinding excessively fast
or accidentally slipping off the drum. Extreme fast unwinding and abrupt brake disengagement may cause
severe damages to the wire rope.
Exact prebrake regulation occurs when the rope can be effortless spooled off the drum.
The prebrake arrangement must be disengaged for uphill skidding operations in order to ensure easier
pulling of the rope.
1 0