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Electrical System
No Telescope Out from Base Console:
NOTE
Telescope Out may be disabled by the dual load zone system. Please first ensure the boom is fully retracted
and there are no faults in the dual load system.
1. Loose or broken wire #10C from resistor R1 to
telescope switch S14.
2. Defective telscope switch S14.
3. Loose or broken wire #39 from boom switch S14
to base terminal block.
No Telescope Out from Platform Console:
1. Loose or broken wire #04 from platform terminal
block to telescope switch S18.
2. Defective telescope switch S18.
3. Loose or broken wire 39A from S18 to J2 pin #33
of valve driver.
4. No output on J2 pin #24 of the valve driver to
wire #20B.
5. No output on J2 pin #10 of the valve driver to
wire #39.
6. Loose or broken wire #39 from valve driver J2
pin #10 to plug B pin #9 in platform control
console.
7. Loose or broken wire #39 in boom cable B or its
connectors.
8. Loose or broken wire #39 from base connector
plug B pin #9 to base terminal block.
SJ85 AJ
Section 4 – Troubleshooting Information
Check continuity. Replace if defective.
Check continuity through switch while activating
up function between wires #10C and #39. Replace
switch if no continuity.
Check continuity. Replace if defective
Follow steps on
No Boom Extend from Base or
Platform Consoles: on page
Check continuity. Replace if defective.
Check continuity through switch while activating
function between wires #4 and #38A. Replace
switch if no continuity.
Check continuity. Replace if defective.
Check for 12 volts. If no voltage present with foot
on footswitch check section 5 for OCM pin voltage
reference.
Check for a minimum 3.5 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 #9 on cable B.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
Check continuity. Replace if defective.
Follow steps on
No Boom Extend from Base or
Platform Consoles: on page
114.
114.
229044ADA
113
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