Liebherr R 9250 E 1129 Hydraulic Excavator Operating Manual 25385 - PDF DOWNLOAD

Page 142

Control and operation

Operating manual

Setting the machine into operation

stalled), S100-5 or S100-6 (optional). For location of emergency stops, refer to section «Electrical system» in chapter 5 of this manual. In the two cases: The main circuit breaker Q2A opens. The low voltage system (heater, air conditioning, batteries charger, etc.) is disconnected. The electric motor is stopped. If the machine has a 45° access ladder, the ladder is automatically lowered when an emergency stop is operated. For machines with option «Vessel - excavator data link», if you push an emergency stop: The machine sends the information «Remote trip to CB» to the vessel. Caution! Use this shut off method only in emergencies.

After a shut down via an emergency stop button, you must unlock it before attempting to restart.

Fig. 3-70 S73

Safety control buttons S73 and S74 for hydraulic pumps

Pumps power safety control

S74

Pumps flow safety control

Pumps power safety control During normal operation of the excavator, the electronic horsepower control continuously adjusts the pump flow to the pressure level of the working circuits. If a trouble occurs in the circuit of the regulator, the pumps are swivelled back to minimal flow.

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copyright © Liebherr-Mining Equipment Colmar SAS 2020

MJFCIFSS

R 9250 E / 10360689

LEC/en/Edition: 12 / 2020

Safety controls for hydraulic pumps


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