Donati DRH 1 Series, Инструкция по эксплуатации

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MAN16MG05
instructions for use series drh
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1. Activating the descent button -1- of the push-button panel, bring the hook block to the position of maximum
descent -2- and release any load (fig. 145).
2. Remove live current from the hoist by pressing the emergency stop button -3- ; put the lever of the disconnecting
line switch in the “O” or “OFF” position, reach the working zone safely, carrying the push-button panel to a
height to prevent it being activated from the ground (fig. 146).
3. Operating at a height, remove the protection grill -4- positioned on the brake cover of the hoist -5- by unscrewing
completely the four screws
-6-
(fig. 147).
4. Unscrew completely the three screws -7- from the blocking ring -8- of the brake block -9- (fig. 148).
6.4.1 Lfting brake adjustment (conical motor)
To set the hoist motor brake proceed as follows:
6.4
Setting and adjustments
• The hoist motor is self-braking type with axial movement of the rotor.
• The braking is mechanical and ensured by a conical brake block integral with the rotor which,
in a power failure, is pushed by a spring in contact with the brake lining of the brake cover.
• The asbestos-free brake lining are subjected to greater or lesser wear depending on the intensity
of use.
• The wear on the brake lining increases the clearance between the gasket and the brake block.
This involves a progressive loss of the braking couple with consequent slipping of the brake and
lengthening of the braking spaces. For this reason the adjustment of the clearance of the brake
could be necessary.
fig. 145 fig. 146
1
2
3
fig. 147 fig. 148
6
5
6
6
6
7
8
9
99 instructions for use series drh
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MAN16MG05
fig. 149 fig. 150
fig. 151 fig. 152
• If the adjustment of the hoist brake has been carried out several times and after the last
adjustment the stability of the load is not guaranteed yet (excessive slipping of load, see point
6.3.3), it is necessary to replace the brake cover with a new gasket, using SOLELY original spare
parts.
• For brake replacing operations see point 6.6.2
9
8
7
9
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6
6
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4
5. Remove the ring from the block by unblocking it, if necessary using a screwdriver in the notch of the ring (fig. 149).
6.
Turn the ring 360° (1 complete turn) in anticlockwise direction -8- , considering that one complete turn of the ring
causes an axial movement of 1 mm of the brake block -9- (fig. 150).
7. Bring the block -9- to the ring again and match up the relative holes.
8. Put back the three screws -7- in the original place on the ring -8- screwing them up again on the block -9- (fig. 151).
9. Put back the grill
-4-
by screwing up completely the four screws
-6-
(fig. 152).
10. At the end of the operation check that the setting of the brake, with recovery of the clearance, has been done
correctly, checking (first empty and then with a nominal load) that:
• the rotation of the motor is free, without anomalous noises, chafing of the brake or overheating of the brake cover
• the brake intervenes silently and the load is braked without showing slipping
11. If you experience anomalies referred to in paragraph 10, a re-adjustment.
KMAN16MG05