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Hydraulic System
1. Stuck or defective differential sensing valve
DSV3.
2. Stuck or defective boom extend valve 3H-38.
3. Stuck or defective check valve CV10.
4. Stuck or defective check valve CV6.
5. Stuck or defective relief valve RV4.
6. Return valve V4 stuck in the open position.
7. Stuck or defective counterbalance valve CB5.
8. Return valve V5 stuck in the closed position or is
defective.
9. Defective extension cylinder C2.
4.3-8 No Jib Up
1. Stuck or defective proportional flow enable valve
2H-42.
2. Stuck or defective check valve CV9.
3. Stuck or defective jib up valve 4H-35.
4. Stuck or defective counterbalance valve CB9.
5. Defective jib cylinder C5.
SJ82 T, SJ86 T
Section 4 – Troubleshooting Information
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Clean valve. Check operation of valve. Repair or
replace valve as required.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Set valve to specifications. Check O-rings and
clean valve. Repair or replace valve as required.
Clean valve. Check operation of valve. Repair or
replace valve as required.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
Clean valve. Check operation of valve. Repair or
replace valve as required.
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
Clean valve. Check operation of valve. Repair or
replace valve as required.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
229040ABA
151
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