OPERATING INSTRUCTIONS RH 340 Operation

Emergency machine drive

Moving the excavator after failure of the hydraulics

The weight of the excavator, the resistance of the crawler tracks and the high reduction in the travel gearboxes make towing or pushing of the excavator in the event of a failure or of defects in the hydraulic system impossible.

Required equipment

 a self-propelled machine with a dual-circuit hydraulic system max. working pressure: 350 bars / 5076psi min. working pressure: 200 bars / 2900psi pump discharge rate: 100 l/min / 26.4gal/min

These are minimum values. The pump discharge rate indicated corresponds to an excavator travelling speed of ca. 3 m/min / 9.8ft/min.

 4 high-pressure hoses ca. 11 m / 36ft long; DN 40 1 ½“ SAE fitting at one end; ready for connection to the auxiliary machine at the other.

 1 control hose, ca. 11 m / 36ft long, to release the brakes one end with a 12 L fitting, the other end prepared for connection to the auxiliary machine at the other.

 1 leakage oil hose, ca. 11 m / 36ft long one end with a 28 L fitting, the other end prepared for connection to the auxiliary machine´s leakage oil line.

The excavator can therefore only be moved with the help of another machine (Fig. 2-98:) (wheel loader or grader). The machine used as auxiliary machine must be equipped with a dual-circuit hydraulic system.

 4 plugs (high-pressure type) for 6000 PSI 1 ½“ SAE connections.

 1 plug screw 12 L

 1 plug screw 28 L