11 No Jib Down; 12 No Platform Rotation Right; 13 No Platform Rotation Left - Skyjack SJ30AJE Service Manual

Hydraulic System

4.3-11 No Jib Down

1. Stuck or defective flow enable valve 2H-20A.
2. Plugged or defective orifice OR2.
3. Stuck or defective jib down valve 4H-34.
4. Stuck or defective counterbalance valve CB7 or
CB8.
5. Defective extension cylinder C5

4.3-12 No Platform Rotation Right

1. Stuck or defective flow enable valve 2H-20A.
2. Plugged or defective orifice OR3.
3. Stuck or defective rotate right valve 4H-37.
4. Stuck or defective counterbalance valve CB9 or
CB10.
5. Defective rotary actuator RA2.

4.3-13 No Platform Rotation Left

1. Stuck or defective flow enable valve 2H-20A.
2. Plugged or defective orifice OR3.
3. Stuck or defective rotate left valve 4H-36.
4. Stuck or defective counterbalance valve CB9 or
CB10.
5. Defective rotary actuator RA2.
SJ30AJE, SJ30ARJE
Section 4 – Troubleshooting Information
Clean valve. Check operation of valve. Repair or
replace valve as required.
Check orifice. Replace if plugged or defective.
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.
Clean valve. Check operation of valve. Repair or
replace valve as required.
Check orifice. Replace if plugged or defective.
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 actuator. Repair or replace as necessary.
Clean valve. Check operation of valve. Repair or
replace valve as required.
Check orifice. Replace if plugged or defective.
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 actuator. Repair or replace as necessary.
196274AF
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