3-84 OM 25-3503 us – Edition 4.1 * * 2503_3503b340.fm
Operation
3.48 Rotating the upper carriage
Rotating the upper carriage is described with standard ISO controls.
Specific safety instructions:
• The upper carriage can rotate a little bit further if the machine has not yet reached its
operating temperature.
• Fast actuation of the control lever rotates the upper carriage fast, slow actuation of the
control lever rotates the upper carriage slowly.
• If the upper carriage needs to be rotated on a slope, let the engine run at idling speed
and actuate the control lever very slowly. Proceed with extreme care and avoid abrupt
movements if the bucket is full.
Rotate the upper carriage to the left as follows:
☞ Push the control lever on the left 1 to the left A
➥ The upper carriage rotates to the left
Rotate the upper carriage to the right as follows:
☞ Push the control lever on the left 1 to the right B
➥ The upper carriage rotates to the right
Swivel unit brake
Hydraulic swivel unit brake:
The upper carriage’s rotation is sufficiently braked by moving control lever 1 back to initial
position. Moving the control lever in the opposite direction (counteraction) brakes the
upper carriage with maximum hydraulic output.
Mechanical stop brake:
A multidisk brake integrated in the rotation drive has an additional mechanical brake effect
with time delay. This negative-effect brake is used as a stop brake and parking brake for
the swivel unit. The upper carriage can be stopped in any position.
Information!
Do not use the brake as a service brake but only as a stop brake and parking
brake for the swivel unit.
Fig. 201: Rotating the upper carriage to the left
A
1
Fig. 202: Rotating the upper carriage to the right
1
B
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