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