Genie Z-25/8 - Service Manual

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Service

Manual

Technical

Publications

First Edition Third Printing

Part No. 41314

•

Z-20 8

Z-25 8

Main Page

Safety Rules3
Theory of Operation5
Table of Contents7
Specifications13
Hydraulic Specifications All Models16
Hydraulic Hose and Fitting Torque Specifications17
Scheduled Maintenance Inspections19
Maintenance Inspection Report22
Scheduled Maintenance Procedures23
Inspect the Operator's and Safety Manuals24
Inspect the Decals and Placards24
Inspect for Damage and Loose or Missing Parts25
Check the Hydraulic Oil Level25
Check for Hydraulic Leaks26
Test the Platform and Ground Controls27
Test the Auxiliary Power Operation28
Test the Tilt Sensor28
Test the Drive Speed Limit Switch29
Perform 30 Day Service31
Check the Batteries32
Inspect the Electrical Wiring33
Inspect the Tires and Wheels (Including Castle Nut Torque)34
Test the Key Switch34
Test the Emergency Stop Buttons35
Test the Ground Control Override35
Test the Horn36
Test the Foot Switch36
Test the Drive Brakes37
Test the Drive Speed - Stowed Position38
Test the Drive Speed - Raised Position39
Test the Alarm Package (if Equipped)40
Perform Hydraulic Oil Analysis41
Check the Electrical Contactors41
Replace the Hydraulic Tank Return Filter41
Bleed the Jib Boom Rotator43
Test or Replace the Hydraulic Oil44
All Functions will Not Operate49
Pump Motor will Not Operate52
Auxiliary Functions Inoperative54
All Functions Inoperative, Power Unit Starts and Runs56
Ground Controls Inoperative, Platform Controls Operate Normally57
Platform Controls Inoperative, Ground Controls Operate Normally58
Boom up Function Inoperative61
Boom down Function Inoperative63
Jib Boom up Function Inoperative65
Jib Boom down Function Inoperative68
Jib Boom Rotate Left Function Inoperative71
Jib Boom Rotate Right Function Inoperative74
Steer Left Function Inoperative77
Steer Right Function Inoperative78
All Drive Functions Inoperative, All Other Functions Operate Normally79
Drive Forward Function Inoperative82
Drive Reverse Function Inoperative83
Machine will Not Drive at Full Speed84
Machine Drives at Full Speed with Platform Raised87
Brake Release Function Inoperative88
Electrical Schematic89
Hydraulic Schematic89
Electrical Components90
Electrical Symbols Legend92
Abbreviation Legend93
Electrical Schematic95
Z-20/8 (before Serial Number 125)95
Z-20/8N (before Serial Number 968)95
Z-20/8 (after Serial Number 124)97
Z-20/8N (after Serial Number 967)97
Platform Control Box Wiring Diagram101
Z-20/8N (before Serial Number 968)101
Platform Control Box Wiring Diagram102
Z-20/8N (after Serial Number 967)103
Power Cable Diagram105
Hydraulic Symbols Legend108
Hydraulic Schematic109
Z-20/8 (before Serial Number 125)109
Z-20/8N (before Serial Number 968)109
Z-20/8 (after Serial Number 124)111
Z-20/8N (after Serial Number 967)111
Platform Controls114
Joystick Controller114
Foot Switch117
Toggle Switches118
Control Relays119
Platform Components121
Platform121
Jib Boom Components122
Jib Boom122
Jib Boom Cylinder124
Jib Boom Rotator125
Boom Components128
Boom129
Boom Lift Cylinder133
Ground Controls134
Wago Components134
Hydraulic Pumps135
Auxiliary Pump135
Main Function Pump136
Manifolds138
Function Manifold Components138
Valve Adjustments - Function Manifold140
Jib Boom and Jib Boom Rotate Manifold Components142
Brake Release Hand Pump Components143
Steering Axle Components144
Yoke and Drive Motor144
Steering Cylinder146
Steering Bellcrank147
Non-Steering Axle Components149
Drive Brake149

Genie Z-25/8 - Service Manual

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