SECTION 4, Page 29
SJKB-40-D, SJKB-40-D/F
JUN. 1999
TROUBLESHOOTING (Cont.)
TROUBLE
PROBABLE CAUSE
REMEDY
HYDRAULIC SYSTEM (Cont.)
NO STEER LEFT
1.
Stuck or defective steer left valve
4H-24A.
2.
Blown seals in rotary manifold.
3.
Steer cylinder bypassing
internally.
1.
Clean Valve. Replace if defective.
2.
Rebuild Rotary Manifold. Replace
if defective.
3.
Rebuild Cylinder. Replace if
damaged.
NO MAIN BOOM DOWN
1.
Stuck or defective main boom
down valve 4H-30A.
2.
Stuck or defective counter
balance valve CB9.
1.
Clean Valve. Replace if defective.
2.
Clean Valve. Replace if defective.
NO MAIN BOOM UP
1.
Stuck or defective main boom up
valve 4H-31A.
1.
Clean Valve. Replace if defective.
MAIN BOOM DRIFTS
DOWN
1.
Open or leaking emergency down
valve V1.
2.
Defective counter balance valve
CB9.
3.
Cylinder C2 by passing internally.
1.
Close Valve. Replace if defective.
2.
Clean Valve. Replace if defective.
3.
Rebuild Cylinder. Replace if
damaged.
NO JIB BOOM DOWN
1.
Stuck or defective jib boom down
valve 4H-34A.
2.
Plugged orifice 02.
3.
Stuck or defective counter
balance valve CB8.
4.
Plugged orifice 01.
1.
Clean Valve. Replace if defective.
2.
Clean Orifice.
3.
Clean Valve. Replace if defective.
4.
Clean Orifice.
NO JIB BOOM UP
1.
Stuck or defective jib boom up
valve 4H-35A.
2.
Plugged orifice 01.
3.
Stuck or defective counter
balance valve CB7.
4.
Plugged orifice 02.
1.
Clean Valve. Replace if defective.
2.
Clean Orifice.
3.
Clean Valve. Replace if defective.
4.
Clean Orifice.
JIB BOOM DRIFTS DOWN
1.
Emergency down valve V2 open
or leaking.
2.
Leaking or defective counter
balance valve CB8.
3.
Jib cylinder C4 by passing
internally.
1.
Close Valve. Replace if defective.
2.
Check Valve. Replace if
defective.
3.
Rebuild Cylinder. Replace if
defective.
NO PLATFORM ROTATE
LEFT
1.
Stuck or defective platform rotate
left valve 4H-36A.
2.
Defective platform rotary actuator
RA1
3.
Stuck counter balance valve
CB6.
1.
Clean Valve. Replace if defective.
2.
Check Actuator. Replace if
defective.
3.
Clean Valve. Replace if defective.
Summary of Contents for SJKB-40-D
Page 1: ......
Page 51: ...SJKB 40 D SJKB 40 D F SECTION 3 Page 28 JUNE 1999 NOTES ...
Page 85: ...SECTION 5 Page 2 SJKB 40 D SJKB 40 D F JUN 1999 NOTES ...
Page 100: ...SECTION 5 Page 17 SJKB 40 D SJKB 40 D F JUN 1999 NOTES ...
Page 129: ...SECTION 6 Page 16 SJKB 40 D SJKB 40 D F JUN 1999 NOTES ...
Page 137: ...SECTION 6 Page 24 SJKB 40 D SJKB 40 D F JUN 1999 NOTES ...
Page 189: ...SECTION 6 Page 76 SJKB 40 D SJKB 40 D F JUN 1999 NOTES ...
Page 209: ...SECTION 6 Page 96 SJKB 40 D SJKB 40 D F JUN 1999 NOTES ...
