Skyjack SJKB-40-D Operating Maintenance Instructions & Part List page 64

TROUBLE
NO JIB UP OR DOWN
FROM PLATFORM CON-
TROLS
NO JIB DOWN FROM
PLATFORM CONTROLS
NO JIB UP FROM PLAT-
FORM CONTROLS
NO PLATFORM ROTATE
LEFT FROM PLATFORM
OR BASE CONTROLS
SJKB-40-D, SJKB-40-D/F
TROUBLESHOOTING (Cont.)
PROBABLE CAUSE
ELECTRICAL SYSTEM (Cont.)
1. Loose or broken wire #08 from
platform terminal block TB3 to jib
up/down switch S18.
2. Defective jib up/down switch S18.
1. Defective jib up/down switch S18.
2. Loose or broken wire #34 from jib
up/down switch S18 to platform
terminal block TB2.
3. Loose or broken wire #34 from
platform terminal block TB2 to
base terminal block TB3.
1. Defective jib up/down switch S18.
2. Loose or broken wire #35 from jib
up/down switch S18 to platform
terminal block TB2.
3. Loose or broken wire #35 from
platform terminal block TB2 to
base terminal block TB3.
1. Loose or broken wire #36 from
base terminal block TB3 to relay
36CR.
2. Loose or broken wire #02 from
relay 36CR to base terminal block
TB3.
3. Defective relay 36CR.
4. Loose or broken wire #09 from
base terminal block TB3 to relay
36CR.
5. Loose or broken wire #36A from
relay 36CR to platform rotate left
valve coil 4H-36A.
6. Defective platform rotate left valve
coil 4H-36A.
7. Loose or broken wire #02 from
platform rotate left valve coil 4H-
36A to base terminal block TB3.
8. Open diode D36.
1.
2.
1.
2.
3.
1.
2.
3.
1.
2.
3.
4.
5.
6.
7.
8.
JUN. 1999
REMEDY
Check Continuity. Replace if
defective.
Check Switch. Replace if
defective.
Check Switch. Replace if
defective.
Check Continuity. Replace if
defective.
Check Continuity. Replace if
defective.
Check Switch. Replace if
defective.
Check Continuity. Replace if
defective.
Check Continuity. Replace if
defective.
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 through coil.
Replace if defective.
Check Continuity. Replace if
defective.
Check Diode. Replace if
defective.
SECTION 4, Page 13