No Jib Down; 10 No Platform Rotation - Skyjack SJ82 T Service Manual

Section 4 – Troubleshooting Information

4.3-9 No Jib Down

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-34.
4. Stuck or defective counterbalance valve CB8.
5. Defective jib cylinder C5.

4.3-10 No Platform Rotation

Right Rotation
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-37.
4. Stuck or defective counterbalance valve CB11.
5. Defective rotary actuator RA1.
Left Rotation
1. Stuck or defective proportional flow enable valve
2H-42.
2. Stuck or defective check valve CV9.
229040ABA
152
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.
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 actuator. Repair or replace as necessary.
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.
Hydraulic System
SJ82 T, SJ86 T