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Section 4 – Troubleshooting Information
4.2-21 No boom extend Function from Base or Platform Consoles (ANSI)
1. Loose or broken wire #39 from base terminal
block to 121CR2 pin 30.
2. Loose or broken wire #02 from 121CR2 relay pin
86 to ground.
3. Defective relay 121CR2.
4. Loose or broke wire #39A from 121CR2 relay to
harness plug pin #13.
5. Loose or broke wire #39A from harness plug pin
#13 to boom extend valve 4H-39A.
6. Loose or broken wire #02 from turret harness
plug to boom extend valve 4H-39A.
7. Defective boom extend coil 4H-39A.
4.2-22 No boom down Function from Base or Platform Consoles (CE, AS)
1. Loose or broken wire #13 from base terminal
block to load sense/dual load zone module white
connector J4 pin 7.
2. No output on load sense/dual load zone module
white connector J4 pin 5 to wirer 13A.
3. Loose or broke wire #13A from load sense/dual
load zone module white connector J4 pin 5 to
harness plug pin #3.
4. Loose or broke wire #13A from harness plug pin
#3 to boom down valve 4H-13A.
5. Loose or broken wire #02 from turret harness
plug to boom down valve 4H-13A.
6. Defective boom down coil 4H-13A.
229040ABA
146
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check relay. Replace if defective
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity and resistance through coil. Re-
.
place if defective
Check continuity. Replace if defective.
Check pin #5 for 12 volts. If no voltage present
when operating down function check section 5 for
module information.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity and resistance through coil. Re-
place if defective.
Electrical System
SJ82 T, SJ86 T
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