153
SJ82 T, SJ86 T
229040ABA
Hydraulic System
Section 4 – Troubleshooting Information
3.
Stuck or defective jib up valve 4H-36.
Clean valve. Check operation of valve. Repair or
replace valve as required.
4.
Stuck or defective counterbalance valve CB10.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
5.
Defective rotary actuator RA1.
Check actuator. Repair or replace as necessary.
4.3-11 Platform will not Level
Level Down
1.
Stuck or defective platform level down valve 4H-
40.
Clean valve. Check operation of valve. Repair or
replace valve as required.
2.
Stuck or defective dual check valve DCV2.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
3.
Stuck or defective check valve CV8.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
4.
Stuck or defective shuttle valve SV3.
Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
5.
Stuck or defective relief valve RV3.
Set valve to specifications. Check O-rings and
clean valve. Repair or replace valve as required.
6.
Stuck or defective counterbalance valve CB6.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
7.
Plugged orifice OR2.
Check orifice. Clean if plugged or replace if defec-
tive.
8.
Defective leveling cylinder C3 or slave cylinder
C4.
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
Level Up
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