OPERATING INSTRUCTIONS RH 90 C E

Inspection and servicing

CENTRAL LUBRICATING Design

The excavator is equipped with an automatic central lubricating system which provides grease regularly to all greasing points except those mentioned in the "Lubricating chart - Grease".

The central lubricating system is activated when the electrical system is switched on with the keyswitch and the electric motor is running. All greasing points connected to the system are greased at regular intervals.

The central lubricating system is controlled electro-hydraulically by the programmable SPC contoller.

The SPC is located in a switch box underneath the cab.

Function

The grease is pumped by the pump (2, Fig. 3-86:) via greasing lines from the grease container to the main distributors on the superstructure.

Fig. 3-85:

If a fault occurs, BCS gives a warning on the screen (2, Fig. 3-85:). Actuate the "Reset" button in the control column to eleminate the fault. Is this is not possible, call in servicing personal.

For further information on the function and setting refer to the "Technical Handbook – SPC (Stored Program Control").

The control elements of the lubricating system are installed on the panel (3, Fig. 3-87:)

As soon as the grease container is empty, the BCS (Fig. 3-85:) gives a warning signal. In the event of a fault, the "dumping" function is switched off automatically after 15 min.

Work can be continued when the grease container is filled with grease.

Operating Instructions Rh 90 C E

Inspection and servicing

Replacing the grease drum

Detach lines (7, 8 and 9, Fig. 3-88:).

Loosen wing nuts (12) and lift off holder (3). Remove cover together with grease pump (2) from grease container (1, Fig. 3-89:).

Replace the empty container by a full one.

Fasten cover with grease pump (2, Fig. 3-88:) on grease container.

Reconnect lines (7, 8 and 9)

Checking the greasing pressure

Check every week, whether the oil pressure indicated by pressure gauge (4, Fig. 3-90:) is 60 bars (the pressure is dependind on temperature and viscosity of the oil and may vary).

This oil pressure is reduced so that the pressure indicated by pressure gauge (5, Fig. 3-91:) is 35 –40 bars.

The necessary greasing pressure is generated by means of a pressure translator.

The greasing pressure is indicated by pressure gauge (9).

In the event of deviating pressure values, switch off the electric motor and check the central greasing system.

Lower oil pressure means that not all of the greasing points are supplied with grease.