27
CHECK OF COUPLING OF THE WORM SCREW AND WORM GEAR
For some types of platforms the movement of the jib and levelling of the cage are carried out by
means of a worm reduction unit and worm gear device.
For these gear boxes the following must be checked:
1)
Wear of the tooth of the worm screw.
The amount of wear must be less than 2 mms. If it is greater, replace the screw.
2)
Wear of the tooth of the worm gear.
The amount of wear must be less than 2 mms. If it is greater, replace the gear.
On completing the check, put the guard back into place.
The grease contained in the box may be re-used if it does not contain any traces of metallic dust
or other materials which might have an abrasive effect.
If it has to be replaced, request the special mixture.
GENERAL CHECKS
CHECK OF THE STRUCTURE
Check the condition of the welds on the following structures:
turret
Checked
telescopic boom
Checked
cage
Checked
Make sure that the clearance of the pins in their articulated joints is
not excessive and that they are correctly greased
Checked
Check the clearance of the slew ring and of the rotation reduction gear
Done
Check the clearance of the slew ring and of the rotation reduction gear
Checked
Make sure that the wiring boxes are dry inside
Checked
Check that the structure does not have any marks or deformations due to
blows or excessive wear
Checked
Check that there are no leakages in the hydraulic system and the jacks
Checked
Make sure that the indications on the controls and the warning notices are
in place
Checked
Содержание 160 ALU
Страница 8: ...8 MULTITEL 220 ALU AF ...
Страница 23: ...23 ADDITIONAL INSTRUCTIONS FOR PARTICULAR OPTIONS ...