11 Platform Will Not Level - Skyjack SJ82 T Service Manual

Hydraulic System
3. Stuck or defective jib up valve 4H-36.
4. Stuck or defective counterbalance valve CB10.
5. Defective rotary actuator RA1.

4.3-11 Platform will not Level

Level Down
1. Stuck or defective platform level down valve 4H-
40.
2. Stuck or defective dual check valve DCV2.
3. Stuck or defective check valve CV8.
4. Stuck or defective shuttle valve SV3.
5. Stuck or defective relief valve RV3.
6. Stuck or defective counterbalance valve CB6.
7. Plugged orifice OR2.
8. Defective leveling cylinder C3 or slave cylinder
C4.
Level Up
SJ82 T, SJ86 T
Section 4 – Troubleshooting Information
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.
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 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 O-rings on valve. Repair or
replace valve as required.
Check orifice. Clean if plugged or replace if defec-
tive.
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
229040ABA
153