Upright AB46 C, Service & Parts Manual

Page: 52 / 148

Section
Troubleshooting
4-2 AB46 Work Platform
4.1
Table 4-1 Troubleshooting Guide - Hydraulic Schematic
Component . . Function Steer Riser Boom Extend Boom Raise Jib Cage Level Cage Rotate Slew Drive Diff Lock Drive Brake Release Parking Brake Release
Pump X X X X X X X X
Steer Valve X
Steer Cylinder X
High Relief X X X X X X X X
Relief Check Valves X X X X X X X X X X
High Dump 1 X X
Diverter Valve 2 2 2 2 2 2 2 2
Riser Valve X
Riser Cylinder X
Riser C/B Valve X
Riser CK Valve X
Boom Extend Valve X
Boom Extend Cylinder X
Boom Extend C/B Valve X
Boom Extend CK Valve X
Boom Raise Valve X
Boom Raise Cylinder X
Boom Raise C/B Valve X
Boom Raise CK Valve X
Proportional Valve X X X X X
Jib Valve X
Jib Orifice X
Jib Cylinder X
Jib C/B Valve X
Jib CK Valve X
Master Cylinder X
Master Cylinder C/B Valves X
Master Cylinder CK Valves X
Slave Cylinder X
Slave Cylinder CB Valves X
Trim Level Valve X
Low Relief Valve X X X X X X X
Cage Rotate Cylinder X
Cage Rotate Valve X
Cage Rotate C/B Valve X
Cage Rotate CK Valve X
Slew Motor X
Turret Rotate Valve X
Turret Rotate CK Valve X
1000 PSI Relief X
1. High dump is not activated by steering. It will close for other functions while steering.
2. Diverter valve is not activated during normal operation. Only for hand pump operation.