Liebherr ER934C, ER944C, ER954C, EP934C, ER944C, ER954C Excavator Service Repair Manual

Table of Content of the ER934C, ER944C, ER954C, EP934C, ER944C, ER954C Manual:

• General information
• Tools
• Technical data / Maintenance guidelines
• Engine / Motor
• Coupling / Splitterbox
• Hydraulic system
• Hydraulic components
• Electrical system
• Swing gear
• Swing ring
• Travel gear
• Options
• Cab / Heater / Air conditioning system
• Central lubrication

This manual contains technical data, design and functional descriptions, as well as service and set up instructions. The documents include numbers of drawings, functional diagrams, as well as detailed views of units and assemblies of LIEBHERR hydraulic excavators.

This manual has been created in order to assist the customer support services, but does of course replace neither proper technical training and qualification of the user nor participation in LIEBHERR operator training courses.
General basic technical information is not included in this manual. For operating instructions and information on spare parts, please refer to the separate documentation.

Manual Extract: Bleeding the line break safety valves

The LBS – valves must be bled in case delays or irregularities are noticed when actuating the corresponding hydraulic cylinders. The bleeder screw 40 designed for bleeding action is mounted to the control cover 26 of the LBS – valve.
– Lower the working attachment to the ground and position so to ensure good accessibility to the LBS – valve to be bled and to the bleeder screw.
– Unscrew the bleeder screw 40 by approx. one complete turn.
– Slowly actuate all the way to the stop the pilot control valve, in direction of the lowering movement which is locked by the LBS – valve.
– Maintain the movement actuated for approx. one minute, resp. until it can be noticed, that bubble free oil escapes from the bleeder screw.
– Screw in the bleeder screw 40 all the way, and tighten the screw to the prescribed torque.