KYJACK, Page 8
JIII Conventional eries
143911
ection 4 - Troubleshooting Information
ervice and Maintenance
Electrical ystem (Continued)
7. Defective down valve 2H-13B.
Check continuity through coil. Replace if defective.
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8. Defective lift cylinder holding valve 2H-13B-1 or holding valve 2H-13B-2.
Check continuity through coil. Replace if defective.
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9. Loose or broken wire #02 from holding valve 2H-13B-1 or holding valve 2H-13B-2 or down valve 2H-13B
to base terminal block.
Check continuity. Replace if defective.
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4.1-11 No Up Function from Base Control Console
1. Defective up/down switch S2.
Check switch. Replace if defective.
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2. Loose or broken wire #14E from up/down switch S2 to base terminal switch.
Check continuity. Replace if defective.
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3. Open diode D14E-1.
Check diode. Replace if defective.
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4. Open diode D14E
(AN I/C A)
or diode D14E-2
(CE)
.
Check diode. Replace if defective.
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4.1-12 No Down Function from Base Control Console
1. Defective up/down switch S2.
Check switch. Replace if defective.
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2. Loose or broken wire #13 from up/down switch S2 to base terminal block.
Check continuity. Replace if defective.
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4.1-13 teer Only Inoperative
1. Defective relay 17CR.
Check relay. Replace if defective.
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2. Loose or broken wire #17B from diodes D23 and D24 to base terminal block B1.
Check continuity. Replace if defective.
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3. Loose or broken wire #17B from 17CR steer relay to base terminal block B1.
Check continuity. Replace if defective.
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4. Loose or broken wire #17C from 17CR steer relay to diodes D17C and D17C-1.
Check continuity. Replace if defective.
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5. Open or defective diode D17C or diode D17C-1.
Check diode. Replace if defective.
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4.1-14 Drive Only Inoperative
1. Open or defective diode D17-1.
Check diode. Replace if defective.
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4.1-15 No Drive or teer when Platform Fully Lowered
1. Loose or broken wire #71 from base terminal block to drive override limit switch LS6.
Check continuity. Replace if defective.
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2. Defective drive override switch LS6.
Check switch. Replace if defective.
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3. Loose or broken wire #19 from drive override limit switch LS6 to base terminal block.
Check continuity. Replace if defective.
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