Skyjack SJ82 T Service Manual

139
SJ82 T, SJ86 T
229040ABA
Electrical System Section 4 – Troubleshooting Information
4.2-13 Brake will not Release
1. No output on pin #10 from valve driver to wire
#26 when operating a drive function.
Check pin #10 for 12 volts. If no voltage present
with foot on footswitch check section 5 for OCM pin
voltage reference.
2. Loose or broken wire #26 from valve drive
pin #10 to plug A pin #11 in platform control
console.
Check continuity. Replace if defective.
3. Loose or broken wire #26 in Cable A or its
connectors.
Check for continuity between pins #11 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
4. Loose or broken wire #26 from base plug A pin
#11 to turret harness plug pin #8.
Check continuity. Replace if defective.
5. Loose or broken wire #26 or #02 from turret
harness plug to brake valve 3H-26.
Check continuity. Replace if defective.
6. Defective brake valve coil 3H-26. Check continuity and resistance through coil.
Replace if defective.
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.
Check continuity. Replace if defective.
2. Loose or broken wire #02 from platform terminal
block to drive joystick A2.
Check continuity. Replace if defective.
3. Defective drive joystickA2. See drive joystick test procedure in section 5.
No Forward Drive
1. No output on “D” when forward is selected on
drive joystick A2.
See drive joystick test procedure in section 5.
2. Loose or broken wire ”D-signal” from drive
joystick A2 to valve driver pin #27.
Check continuity. Replace if defective.
3. No output from valve driver pin #34 to wire #16. Check pin #34 for minimum 2 volts. If no voltage
present with foot on footswitch check section 5 for
OCM pin voltage reference.
4. Loose or broken wire #16 from valve driver pin
#34 to plug B pin #5 in platform control console.
Check continuity. Replace if defective.
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Skyjack SJ82 T Specifications

General

Brand	Skyjack
Model	SJ82 T
Category	Boom Lifts
Language	English