Skyjack SJ85 AJ Service Manual

135
SJ85 AJ 229044ADA
Hydraulic System Section 4 – Troubleshooting Information
4.3-9 No Platform Rotate
No Platform Rotate Right:
1. Stuck or defective proportional flow enable valve
2H-42.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
2. Stuck or defective check valve CV18. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
3. Stuck or defective rotate right valve 4H-37. Clean valve. Check operation of valve. Repair or
replace valve as required.
4. Flow Regulator FR2 stuck or defective. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
5. Return check valve CV7 suck or defective. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
6. Orificed fittings at platform rotator plugged. Clean or replace orifices as required.
7. Stuck or defective counterbalance valves CB10
and/or CB11.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
8. Defective platform rotator RA1. Check seals on rotator Replace as necessary.
Repair or replace rotator if defective.
No Platform Rotate Left:
1. Stuck or defective proportional flow enable valve
2H-42.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
2. Stuck or defective check valve CV18. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
3. Stuck or defective rotate left valve 4H-36. Clean valve. Check operation of valve. Repair or
replace valve as required.
4. Flow Regulator FR2 stuck or defective. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
5. Return check valve CV7 suck or defective. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
6. Orificed fittings at platform rotator plugged. Clean or replace orifices as required.
7. Stuck or defective counterbalance valves CB10
and/or CB11.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
8. Defective platform rotator RA1. Check seals on rotator Replace as necessary.
Repair or replace rotator if defective.
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Skyjack SJ85 AJ Specifications

General

Brand	Skyjack
Model	SJ85 AJ
Category	Boom Lifts
Language	English