13 Brake Will Not Release; 14 No Drive And Steer - Skyjack SJ82 T Service Manual

Electrical System

4.2-13 Brake will not Release

1. No output on pin #10 from valve driver to wire
#26 when operating a drive function.
2. Loose or broken wire #26 from valve drive
pin #10 to plug A pin #11 in platform control
console.
3. Loose or broken wire #26 in Cable A or its
connectors.
4. Loose or broken wire #26 from base plug A pin
#11 to turret harness plug pin #8.
5. Loose or broken wire #26 or #02 from turret
harness plug to brake valve 3H-26.
6. Defective brake valve coil 3H-26.

4.2-14 No Drive and Steer

NOTE
Aerial platform will not drive or steer if it is tilted and off limit switches.
1. Loose or broken wire #4 from platform terminal
block to drive joystick A2 in platform control
console.
2. Loose or broken wire #02 from platform terminal
block to drive joystick A2.
3. Defective drive joystickA2.
No Forward Drive
1. No output on "D" when forward is selected on
drive joystick A2.
2. Loose or broken wire "D-signal" from drive
joystick A2 to valve driver pin #27.
3. No output from valve driver pin #34 to wire #16.
4. Loose or broken wire #16 from valve driver pin
#34 to plug B pin #5 in platform control console.
SJ82 T, SJ86 T
Section 4 – Troubleshooting Information
Check pin #10 for 12 volts. If no voltage present
with foot on footswitch check section 5 for OCM pin
voltage reference.
Check continuity. Replace if defective.
Check for continuity between pins #11 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity and resistance through coil.
Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
See drive joystick test procedure in section 5.
See drive joystick test procedure in section 5.
Check continuity. Replace if defective.
Check pin #34 for minimum 2 volts. If no voltage
present with foot on footswitch check section 5 for
OCM pin voltage reference.
Check continuity. Replace if defective.
229040ABA
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