107
Electrical System Section 4 – Troubleshooting Information
7. Loose or broken wire #13 from valve driver
J2 pin #6 to plug A pin #6 in platform control
console.
Check continuity. Replace if defective.
8. Loose or broken wire #13 in boom cable A or its
connectors.
Check for continuity between pins #6 on cable A.
Check for loose or corroded connections on cable
connectors. Replace if wire is defective.
9. Loose or broken wire #13 from base connector
plug A pin #6 to base terminal block.
Check continuity. Replace if defective.
Follow steps on No Boom Down from Base or
Platform Consoles: on page 107.
No Boom Down from Base or Platform Consoles:
1. Loose or broken wire #13 from base terminal
block to load sense/dual load zone module white
connector J4 pin 7.
Check continuity. Replace if defective.
2. No output on load sense/dual load zone module
white connector J4 pin 5 to wirer 13A.
Check pin #5 for 12 volts. If no voltage present
when operating down function check section 5 for
module information.
3. Loose or broke wire #13A from load sense/dual
load zone module white connector J4 pin 5 to
harness plug pin #3.
Check continuity. Replace if defective.
4. Loose or broke wire #13A from harness plug pin
#3 to boom down valve 4H-13A.
Check continuity. Replace if defective.
5. Loose or broken wire #02 from turret harness
plug to boom down valve 4H-13A.
Check continuity. Replace if defective.
6. Defective boom down coil 4H-13A. Check continuity and resistance through coil.
Replace if defective.
To order go to Discount-Equipment.com
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