Skyjack SJKB-40-D Operating Maintenance Instructions & Part List page 73

TROUBLE
BRAKES WILL NOT RE-
LEASE (Cont.)
BASE CONTROLS INOP-
ERATIVE
ENGINE WILL NOT
START FROM BASE CON-
TROLS
TELESCOPE INOPERA-
TIVE FROM BASE CON-
TROLS
RISER BOOM INOPERA-
TIVE FROM BASE CON-
TROLS
SECTION 4, Page 22
TROUBLESHOOTING (Cont.)
PROBABLE CAUSE
ELECTRICAL SYSTEM (Cont.)
12. Defective brake valve coil 3H-26B.
13. Loose or broken wire #02 from
brake valve coil 3H-26B to base
terminal block TB3.
1. Defective switch S3-2 in key select
switch S3.
2. Loose or broken wire #10 from
switch S3-2 to base control toggle
switches.
3. Loose or broken wire #10 from key
select switch S3 to base terminal
block TB3.
4. Loose or broken wire #10 from base
terminal block TB3 to relay 20ACR.
5. Loose or broken wire #20A from
base terminal block TB3 to relay
20ACR.
6. Loose or broken wire #20 from relay
20ACR to base terminal block TB3.
7. Defective relay 20ACR.
8. Loose or broken wire #10A from
relay 20ACR to base terminal block
TB3.
9. Open diode D10A.
1. Defective base ignition switch S7.
2. Open diode D60-2 at base ignition
switch S7.
3. Loose or broken wire #60A from
base ignition switch S7 to base
terminal block TB3.
1. Defective telescope extend/retract
switch S23.
2. Loose or broken wire #38(retract)
or #39(extend) from telescope
extend/retract switch S23 to base
terminal block TB3.
1. Defective riser boom up/down
switch S22.
2. Loose or broken wire #13(down) or
#14(up) from riser boom up/down
switch S22 to base terminal block
TB3.
JUN. 1999
REMEDY
12. Check Continuity through coil.
Replace if defective.
13. Check Continuity. Replace if
defective.
1. Check Switch.
defective.
2. Check Continuity. Replace if
defective.
3. Check Continuity. Replace if
defective.
4. Check Continuity. Replace if
defective.
5. Check Continuity. Replace if
defective.
6. Check Continuity. Replace if
defective.
7. Check Relay.
defective.
8. Check Continuity. Replace if
defective.
9. Check Diode.
defective.
1. Check Switch.
defective.
2. Check Diode.
defective.
3. Check Continuity. Replace if
defective.
1. Check Switch.
defective.
2. Check Continuity. Replace if
defective.
1. Check Switch.
defective.
2. Check Continuity. Replace if
defective.
SJKB-40-D, SJKB-40-D/F
Replace if
Replace if
Replace if
Replace if
Replace if
Replace if
Replace if