3-54 OM 28Z3 US – Edition 2.0 * * 28Z3b340.fm
Operation
Lowering the boom with the engine switched off
Lower the boom as follows:
☞ Make sure no one is dangerously close to the machine.
☞ Turn the starter key to position “1”.
☞ Press forward and hold the control lever (A and E).
➥ Until the arm system is completely lowered.
☞ Return the control lever to neutral.
Releasing pressure
Proceed as follows:
☞ Stop the engine.
☞ Move the control lever in all directions a few times.
☞ This releases the pressure in the hydraulic system.
Rotating the upper carriage
Rotating the upper carriage is described with standard ISO controls.
Important!
Specific safety instructions
• Until the hydraulic fluid reaches operating temperature, the upper carriage
can creep slightly after the control is placed in the neutral position.
• 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 left-hand side control lever 2 to the left A.
➥ The upper carriage rotates to the left.
Rotate the upper carriage to the right as follows:
☞ Push the left-hand side control lever 2 to the right B.
➥ The upper carriage rotates to the right.
Fig. 73: Lowering the arm system with the engine switched
A
E
2 3
Fig. 74: Rotating the upper carriage to the left
A
2
Fig. 75: Rotating the upper carriage to the right
2
B
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