SECTION 4, Page 22 SJKB-40-D, SJKB-40-D/FJUN. 1999
TROUBLESHOOTING (Cont.)
TROUBLE PROBABLE CAUSE REMEDY
ELECTRICAL SYSTEM (Cont.)
BRAKES WILL NOT RE-
LEASE (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.
12. Check Continuity through coil.
Replace if defective.
13. Check Continuity. Replace if
defective.
BASE CONTROLS INOP-
ERATIVE
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. Check Switch. Replace if
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. Replace if
defective.
8. Check Continuity. Replace if
defective.
9. Check Diode. Replace if
defective.
ENGINE WILL NOT
START FROM BASE CON-
TROLS
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. Check Switch. Replace if
defective.
2. Check Diode. Replace if
defective.
3. Check Continuity. Replace if
defective.
TELESCOPE INOPERA-
TIVE FROM BASE CON-
TROLS
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. Check Switch. Replace if
defective.
2. Check Continuity. Replace if
defective.
RISER BOOM INOPERA-
TIVE FROM BASE CON-
TROLS
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.
1. Check Switch. Replace if
defective.
2. Check Continuity. Replace if
defective.
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