Skyjack SJKB-40-D Operating Maintenance Instructions & Part List page 66

TROUBLE
PLATFORM WILL NOT
LEVEL DOWN FROM
PLATFORM AND BASE
CONTROLS
PLATFORM WILL NOT
LEVEL UP FROM PLAT-
FORM AND BASE CON-
TROLS
PLATFORM WILL NOT
LEVEL UP OR DOWN
FROM PLATFORM CON-
TROLS
SJKB-40-D, SJKB-40-D/F
TROUBLESHOOTING (Cont.)
PROBABLE CAUSE
ELECTRICAL SYSTEM (Cont.)
1. Loose or broken wire #40 from
base terminal block TB3 to relay
40CR.
2. Loose or broken wire #02 from
relay 40CR to base terminal block
TB3.
3. Defective relay 40CR.
4. Loose or broken wire #09 from
base terminal block TB3 to relay
40CR.
5. Loose or broken wire #40A from
relay 40CR to platform level down
valve coil 4H-40A.
6. Defective level down valve coil 4H-
40A.
7. Loose or broken wire #02 from
platform level down valve coil 4H-
40A to base terminal block TB3.
8. Open diode D40.
1. Loose or broken wire #41 from
base terminal block TB3 to relay
41CR.
2. Loose or broken wire #02 from
relay 41CR to base terminal block
TB3.
3. Defective relay 401R.
4. Loose or broken wire #09 from
base terminal block TB3 to relay
41CR.
5. Loose or broken wire #41A from
relay 41CR to platform level up
valve coil 4H-40A.
6. Defective level up valve coil 4H-
41A.
7. Loose or broken wire #02 from
platform level up valve coil 4H-41A
to base terminal block TB3.
8. Open diode D41.
1. Loose or broken wire #08 from
platform terminal block TB1 to
relay 30BCR.
2. Defective relay 30BCR.
3. Loose or broken wire #08A from
relay 30BCR to platform level
switch S17.
1.
2.
3.
4.
5.
6.
7.
8.
1.
2.
3.
4.
5.
6.
7.
8.
1.
2.
3.
JUN. 1999
REMEDY
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.
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.
Check Continuity. Replace if
defective.
Check relay. Replace if defective.
Check Continuity. Replace if
defective.
SECTION 4, Page 15