Description

Liebherr R900B, R904, R914, R924, R934, R944 Litronic Wheel Excavator Manual

Excavator Model Applicable for:
R900B from serial 6001 (Type 664)
R904B from serial 6001 (Type 668, 669)
R914 Standard, R914HD-SL, R914HD-S from serial 6001 (Type 640, 641, 642)
R924HD-SL, R924EW from serial 6001 (Type 645, 646)
R934HD-SL, R934HD-S, R934EW from serial 5001 (Type 647, 648, 649)
R934B HD-SL, R934B HD-S, R934B EW from serial 5001 (Type 923, 924, 925)
R944HD-SL, R944HD-S from serial 5001 (Type 650, 651)
R944B HD-SL, R944B HD-S from serial 5001 (Type 650, 651)
Language: English
Publication: 8504335
Format: PDF
March 2002

Liebherr R900B, R904, R914, R924, R934, R944 Litronic Wheel Excavator Service Manual – 1233 Pages

Table of Content of the Service Manual:

• 1 General information
• 2 Tools
• 3 Technical data / Maintenance guidelines
• 4 Engine
• 5 Coupling / Splitterbox
• 6 Hydraulic system
• 7 Hydraulic components
• 8 Electrical system
• 9 Swing gear
• 10 Swing ring
• 11 Travel gear / Two Speed Gear Box
• 12 Track components / Axles
• 13 Steering System
• 14 Oscillating Axle Stabilizer
• 15 Brake System
• 16 Special Attachments / Additional Hydraulic Installations
• 17 Cab / Air conditioning system
• 18 Undercarriage / Uppercarriage Attachments
• 19 Arrangement of Tanks

This manual has been prepared to provide you with technical information on the design and construction of the various components which made up the LIEBHERR excavator.

It contains brief and precise descriptions, guidelines and drawings of adjustment procedures as well as hydraulic and electrical schematics, and graphically depicted diagrams and sectionals to help you with any repairs, which might become necessary on our hydraulic excavators.

Manual Extract The servo-control circuit
All spool valves in the control valve blocks are hydraulically controlled.

For the attachment and swing function, two pilot control valves 80 and 81 (joysticks) are installed on the consoles left and right of the operator’s seat.
The two foot pedals 82 and 83 mounted in the front of the cab contain the pilot control valves for travel forward and reverse function.

The pedal operated dual servo control valve 85 and 86 serve to control the additional hydraulic installations (such as the optionally mounted hydraulic hammer, telescopic stick, scrap shear, …. ).
The spool valves are moved hydraulically in proportion to the level or pedal movement of valves 80 to 86, controlling the speed of the cylinders and the oil motors.
The pilot controls 80 to 86 are maintenance free. For a description of function, see sub groups 7.50 and followings.