Cobra 4400 Instruções de Operação descarregar pdf (Página 44)

9.4.4 Wormgear assembly control (Pict. 21)

It is important to check that the worm gear reducer has a correct axial backlash. This can be made, with the

crane at standstill, the boom in horizontal position. Pushing the boom aside on the left and on the right by

hand, you can notice if the axial backlash between the wormshaft (6) and the wormgear (8) is too great. In

this case it has to be reduced, tighten the nut (7) accordingly. Grease the gear with the suggested product

and replace the grease spreader (9), if worn out.

9.4.5 Greasing the hydraulic boom sections (Pict. 22)

1 - Completely extend the telescopic boom

2 - Grease the lower part of the extensions by a brush

3 - Grease the upper part of 1st. extension by the two grease nipples

4 - Grease the upper part of the 2nd. extension by the brush

5 - Carry out 2 or 3 boom re-entry and extension idling operations in order to allow the distribution of

the grease

9.4.6 Wear pads check and replacement

Wear pads need to be replaced when their thickness drops under 5.5 mm (0.22 inch.)

ATTENTION

Failure to replace the wear pads when

they have reached the above stated

wear limit, can prejudice to the good

and safe operation of the crane.

Pict. 22

Pict. 21

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Cobra 4400 Instruções de Operação Página 44