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Section 4 – Troubleshooting Information
No Platform Rotate Right
1. Loose or broken wire #10A from ignition/ pump
switch S5 to platform rotate switch S16.
2. Defective platform rotate switch S16.
3. Open or defective diode D37-1.
4. Loose or broken wire #37A from diode D37-1 to
resistor R1.
5. Loose or broken wire #37 from platform rotate
switch S16 to base connector plug A pin #19.
6. Loose or broken wire #37 in boom cable A or its
connectors.
7. Loose or broken wire #37 plug A pin #19 to
platform terminal block.
8. Loose or broken wire #37 from platform terminal
block to platform rotate right valve 4H-37.
9. Loose or broken wire #02 from platform terminal
block to platform rotate right valve 4H-37.
10. Defective platform rotate right valve coil 4H-37.
No Platform Rotate Left or Right
1. Open resistor R1 (ANSI)/ R2 (CE, AS).
2. Loose or broken wire #35A from resistor R2 to
base key switch S2. (ANSI)
3. Open or defective base key switch S2.
4. Loose or broken wire #42 from base key switch
S2 (ANSI) or resistor R2 (CE, AS) to turret
harness plug pin #16.
5. Loose or broken wire #42 from turret harness
plug pin #16 to proportional flow enable valve
2H-42.
6. Loose or broken wire #02 from turret harness
plug to proportional flow enable valve 2H-42.
7. Defective proportional flow enable valve coil 2H-
42.
229040ABA
124
Check continuity. Replace if defective.
Check continuity through switch while activating
rotate right function between wires #10A and #37.
If no continuity found, replace switch.
Check diode. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check for continuity between pins #19 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. Replace if defective.
Check continuity and resistance through coil.
Replace if defective.
Check resistor for 10 ohms (45T) or 13 ohms (40T).
If no resistance found, replace resistor.
Check continuity. Replace if defective
Select base control on switch. Check continuity
through switch. Replace if defective.
Check continuity. Replace if defective
Check continuity. Replace if defective
Check continuity. Replace if defective
Check continuity and resistance through coil.
Replace if defective.
Electrical System
SJ82 T, SJ86 T
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