Skyjack SJKB-40-D Operating Maintenance Instructions & Part List page 74

TROUBLE
MAIN BOOM INOPERA-
TIVE FROM BASE CON-
TROLS
TURRET ROTATE INOP-
ERATIVE FROM BASE
CONTROLS
JIB BOOM INOPERA-
TIVE FROM BASE CON-
TROLS
PLATFORM ROTATE IN-
OPERATIVE FROM BASE
CONTROLS
PLATFORM LEVELING
INOPERATIVE FROM
BASE CONTROLS
BRAKES APPLY
QUICK ON LEVEL SUR-
FACE
SJKB-40-D, SJKB-40-D/F
TROUBLESHOOTING (Cont.)
PROBABLE CAUSE
ELECTRICAL SYSTEM (Cont.)
1. Defective main boom up/down
switch S21.
2. Loose or broken wire #30(down) or
#31(up) from main boom up/down
switch S21 to base terminal block
TB3.
1. Defective turret rotate switch S27.
2. Loose or broken wire #32(left) or
#33(right) from turret rotate switch
S27 to base terminal block TB3.
1. Defective jib up/down switch S24.
2. Loose or broken wire #34(down) or
#35(up) from jib up/down switch
S24 to base terminal block TB3.
1. Defective platform rotate switch
S25.
2. Loose or broken wire #36(left0 or
#37(right) from platform rotate
switch S25 to base terminal block
TB3.
1. Loose or broken wire #10 from riser
up/down switch S22 to relay
30ACR.
2. Defective relay 30ACR.
3. Loose or broken wire #47 from
relay 30ACR to platform leveling
switch S26.
4. Defective platform leveling switch
S26.
5. Loose or broken wire #40(down) or
#41(up) from S26 to base terminal
block TB3.
TO
1. Loose or broken wire #08 from
base terminal block TB3 to relay
08CR3.
2. Loose or broken wire #02 from
relay 08CR3 to base terminal block
TB3.
3. Defective relay 08CR3.
4. Loose or broken wire #28 from
base terminal block TB3 to relay
08CR3.
1.
2.
1.
2.
1.
2.
1.
2.
1.
2.
3.
4.
5.
1.
2.
3.
4.
JUN. 1999
REMEDY
Check Switch. Replace if
defective.
Check Continuity. Replace if
defective.
Check Switch. Replace if
defective.
Check Continuity. Replace if
defective.
Check Switch. Replace if
defective.
Check Continuity. Replace if
defective.
Check Switch. Replace if
defective.
Check Continuity. Replace if
defective.
Check Continuity. Replace if
defective.
Check Relay. 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 relay. Replace if defective.
Check Continuity. Replace if
defective.
SECTION 4, Page 23