Liebherr DPVG 108, DPVO 108, DMVD 165-108 Displacement Motor Service Repair Manual

Table of Content DPVG 108, DPVO 108, DMVD 165-108 Motor Repair Manual

1 Symbols and safety instructions
1.1 Symbols in the technical description
1.1.1 Identification of operational safety instructions
1.1.2 Additional identifications
1.2 Safety instructions
1.2.1 General safety instructions
1.2.2 Changes to the hydraulic unit
1.2.3 Prevention of personal injuries
1.2.4 Prevention of property damage
1.2.5 Prevention of environmental damage
2 Variable displacement pump DPVG 108
2.1 Structure of the variable displacement pump
2.1.1 Hydraulic connections
2.1.2 Main components
2.1.3 Basic structure
Sectional view – Driving gear with regulation
Sectional view – Control with regulation
2.2 Function of the variable displacement pump
2.2.1 Hydraulic diagram
2.2.2 Mechanical zero position
2.2.3 Feed circuit
2.2.4 Hydraulic zero position
2.2.5 Control and regulation
Control and regulation sequence
2.2.6 Pressure limiting of the high pressure
2.2.7 Pressure cutoff – two-stage
2.2.8 Pressure cutoff – one-stage
2.3 Settings
2.3.1 Overview of measuring points
2.3.2 Setting – mechanical zero position
2.3.3 Setting – feed-pressure valve
Preconditions:
Testing and setting
2.3.4 Setting – hydraulic zero position
Preconditions:
Testing and setting
2.3.5 Setting – high-pressure valves
Preconditions:
Block pressure cutoff
Testing and setting the HP valves
2.3.6 Setting – two-stage pressure cutoff
Preconditions:
Testing and setting the pressure cutoff
Pressure stage 1
Pressure stage 2
2.3.7 Setting – one-stage pressure cutoff
Preconditions:
Testing and setting the pressure cutoff
3 Variable displacement pump DPVO 108
3.1 Structure of the variable displacement pump
3.1.1 Hydraulic connections
3.1.2 Main components
3.1.3 Basic structure
Sectional view – Driving gear
Sectional view – Controller with regulator
3.2 Function of the variable displacement pump
3.2.1 Hydraulic diagram
3.2.2 Control and regulation
Control and regulation sequence
3.2.3 Pressure cutoff
3.3 Settings
3.3.1 Overview of measuring points
3.3.2 Setting – Qmin
Preconditions:
Testing and setting
3.3.3 Setting – Controller
Preconditions:
Testing and setting
3.3.4 Setting – pressure cutoff
Preconditions:
Testing and setting the pressure cutoff
4 Double-variable displacement motor DMVD 165/108
4.1 Description of variable displacement motor
4.1.1 Hydraulic connections
4.1.2 Main components
4.1.3 Basic assembly
Sectional view – drive gear with regulation
Sectional view – controller with regulation
4.2 Function of the double-variable displacement motor
4.2.1 Hydraulic diagram
4.2.2 Control and regulation
Procedure for control and regulation
4.2.3 Drain valve
4.3 Settings
4.3.1 Summary of test points
4.3.2 Adjustment – controller
Prerequisites:
Control and adjustment
Adjustment of controller 20 (VM 165)
Adjustment of controller 30 (VM 108)