SECTION 4, Page 7
SJ-600 Series Engine Powered
112715
June 2001
ELECTRICAL SYSTEM
TROUBLESHOOTING INFORMATION
TROUBLE
PROBABLE CAUSE
REMEDY
4. Loose or broken wire #12 from
platform terminal block to joystick
controller (S7).
5. Loose or broken wire #10A from base
terminal block to relay (28CR).
6. Loose or broken wire #04 from relay
(28CR) to base terminal block.
7. Defective relay (28CR).
1. Loose or broken wire #30 from
diodes (D15A-2) and (D16A-2) to relay
(30CR).
2. Defective relay (30CR).
3. Loose or broken wire #02 from relay
(30CR) to base terminal block.
4. Loose or broken wire #10A from base
terminal block to relay (30CR).
5. Loose or broken wire #30A from relay
(30CR) to base terminal block.
6. Loose or broken wire #30A from base
terminal block to brake dump valve
(2H 30A-1) or brake feed valve (2H30A-
2).
7. Defective valve coil (2H30A-1) brake
dump or (2H30A-2) brake feed.
8. Loose or broken wire #02 from
(2H30A-1) brake dump or (2H30A-2)
brake feed coils to base terminal
block.
1. Defective steer right switch (S7-2) in
joystick controller (S7).
2. Loose or broken wire #23 from steer
right switch (S7-2) to platform terminal
block.
3. Loose or broken wire #23 from
platform terminal block to relay
(23CR).
4. Defective relay (23CR).
5. Loose or broken wire #04 from base
terminal block to relay (23CR).
6. Loose or broken wire #23A from
relay (23CR) to base terminal block.
7. Loose or broken wire #02 from relay
(23CR) to base terminal block.
8. Loose or broken wire #23A from base
terminal block to steer right valve coil
(4H23A).
9. Defective steer right valve coil (4H23A).
10. Loose or broken wire #02 from steer
right valve coil (4H32A) to base
terminal block.
11. Open diode (D23A).
4. Check continuity. Replace if
defective.
5. Check continuity. Replace if
defective.
6. Check continuity. Replace if
defective.
7. Check relay. Replace if defective.
1. Check continuity. Replace if
defective.
2. Check relay. 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 coil. Replace if defective.
8. Check continuity. Replace if
defective.
1. Check switch. Replace if defective.
2. Check continuity. Replace if
defective.
3. Check continuity. Replace if
defective.
4. Check relay. Replace if defective.
5. Check continuity. Replace if
defective.
6. Check continuity. Replace if
defective.
7. Check continuity. Replace if
defective.
8. Check continuity. Replace if
defective.
9. Check coil. Replace if defective.
10. Check continuity. Replace if
defective.
11. Check diode. Replace if defective.
DRIVE AND STEER
INOPERATIVE
(Continued)
BRAKES WILL NOT
RELEASE
STEER RIGHT
INOPERATIVE
Summary of Contents for SJ-7027
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