SkyTrak 8042 Service Manual User Manual

Page 416

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8.1

Model 8042, 10042, 10054 Legacy

Rev. 10/03

Section 8

Hydraulic System

Contents

PARAGRAPH

TITLE

PAGE

8.1 Hydraulic Component Terminology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.3

8.2 Safety Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.4

8.3 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.5

8.4 Hydraulic Fluid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.5

8.5 Hoses, Tube Lines, Fittings, Etc.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.6

8.5.1

Replacement Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.6

8.5.2

Hose, Tube, Line and Fitting Replacement . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.6

8.6 Hydraulic Pressure Diagnosis. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.7

8.6.1

Pressure Checks and Adjustments. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.8

8.7 Hydraulic System Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.10

8.7.1

8042 Hydraulic Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.10

8.7.2

10042 Hydraulic Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.12

8.7.3

10054 Hydraulic Testing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.14

8.8 Hydraulic Circuits and Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.17

8.8.1

Brake Circuit and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.18

8.8.2

Boom Extend Circuit and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.20

8.8.3

Boom Retract Circuit and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.22

8.8.4

Boom Lift Circuit and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.24

8.8.5

Boom Lower Circuit and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.26

8.8.6

Frame Sway (Left) and Stabilizer Circuit and Troubleshooting . . . . . . . . . . . . . .

8.28

8.8.7

Frame Sway (Right) and Stabilizer Circuit and Troubleshooting . . . . . . . . . . . . .

8.30

8.8.8

Attachment Tilt (Down) and Slave Cylinder Circuit and Troubleshooting . . . . . .

8.32

8.8.9

Attachment Tilt (Up) and Slave Cylinder Circuit and Troubleshooting . . . . . . . .

8.34

8.8.10 Pump and Cooling Circuit and Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . .

8.36

8.8.11 Auxiliary Hydraulics Circuit and Troubleshooting (Male Coupler Pressurized) . . .

8.38

8.8.12 Auxiliary Hydraulics Circuit and Troubleshooting (Female Coupler Pressurized) . . .

8.40

8.8.13 Outrigger Circuit (Up) and Troubleshooting (10042/10054) . . . . . . . . . . . . . . . .

8.42

8.8.14 Outrigger Circuit (Down) and Troubleshooting (10042/10054) . . . . . . . . . . . . . .

8.44

8.8.15 Front-Wheel Steering Circuit (Left Turn) and Troubleshooting . . . . . . . . . . . . . .

8.46

8.8.16 Front-Wheel Steering Circuit (Right Turn) and Troubleshooting . . . . . . . . . . . . .

8.48

8.8.17 Four-Wheel Steering Circuit (Left Turn) and Troubleshooting. . . . . . . . . . . . . . .

8.50

8.8.18 Four-Wheel Steering Circuit (Right Turn) and Troubleshooting . . . . . . . . . . . . .

8.52

8.8.19 Crab Steering Circuit (Left Turn) and Troubleshooting . . . . . . . . . . . . . . . . . . . .

8.54

8.8.20 Crab Steering Circuit (Right Turn) and Troubleshooting . . . . . . . . . . . . . . . . . . .

8.56

8.8.21 Brake Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.58

8.8.22 Boom Extend/Retract Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.60

8.8.23 Boom Lift/Lower Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

8.60

8.8.24 Frame Sway and Stabilizer Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . .

8.61

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