No Platform Rotate - Skyjack SJ85 AJ Service Manual

Hydraulic System

4.3-9 No Platform Rotate

No Platform Rotate Right:
1. Stuck or defective proportional flow enable valve
2H-42.
2. Stuck or defective check valve CV18.
3. Stuck or defective rotate right valve 4H-37.
4. Flow Regulator FR2 stuck or defective.
5. Return check valve CV7 suck or defective.
6. Orificed fittings at platform rotator plugged.
7. Stuck or defective counterbalance valves CB10
and/or CB11.
8. Defective platform rotator RA1.
No Platform Rotate Left:
1. Stuck or defective proportional flow enable valve
2H-42.
2. Stuck or defective check valve CV18.
3. Stuck or defective rotate left valve 4H-36.
4. Flow Regulator FR2 stuck or defective.
5. Return check valve CV7 suck or defective.
6. Orificed fittings at platform rotator plugged.
7. Stuck or defective counterbalance valves CB10
and/or CB11.
8. Defective platform rotator RA1.
SJ85 AJ
Section 4 – Troubleshooting Information
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
Clean valve. Check O-rings on valve. Check
operation 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
operation of valve. Repair or replace valve as
required.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
Clean or replace orifices as required.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
Check seals on rotator Replace as necessary.
Repair or replace rotator if defective.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
Clean valve. Check O-rings on valve. Check
operation 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
operation of valve. Repair or replace valve as
required.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
Clean or replace orifices as required.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
Check seals on rotator Replace as necessary.
Repair or replace rotator if defective.
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