Skyjack SJ63 AJ+ Service Manual

189
SJ63 AJ+, SJ63 AJ 229043AAA
Hydraulic System - CE & AS Section 4 – Troubleshooting Information
4.6-12 Jib Up/ Down Slow
1. Stuck or defective rotate select valve 2H-36. Clean valve. Check operation of valve. Repair or
replace valve as required.
4.6-13 No Jib Down
1. Stuck or defective jib down/ platform rotate right
valve 5H-34.
Clean valve. Check operation of valve. Repair or
replace valve as required.
2. Plugged or defective orifice OR4. Check orifice. Replace if plugged or defective.
3. Stuck or defective check valve CV8. Clean valve. Check operation of valve. Repair or
replace valve as required.
4. Stuck or defective counterbalance valve CB2. Clean valve. Check O-rings on valve. Repair or
replace valve as required.
5. Defective jib cylinder C1. Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
4.6-14 No Platform Rotation Right
1. Stuck or defective platform rotate right/ jib down
valve 5H-34.
Clean valve. Check operation of valve. Repair or
replace valve as required.
2. Plugged or defective orifice OR5. Check orifice. Replace if plugged or defective.
3. Stuck or defective check valve CV8. Clean valve. Check operation of valve. Repair or
replace valve as required.
4. Stuck or defective counterbalance valve CB13. Clean valve. Check O-rings on valve. Repair or
replace valve as required.
5. Defective rotary actuator RA1. Check seals on actuator. Replace as necessary.
Replace actuator if defective.
4.6-15 No Platform Rotation Left
1. Stuck or defective platform rotate left/ jib up valve
5H-35.
Clean valve. Check operation of valve. Repair or
replace valve as required.
2. Plugged or defective orifice OR5. Check orifice. Replace if plugged or defective.
3. Stuck or defective check valve CV8. Clean valve. Check operation of valve. Repair or
replace valve as required.
4. Stuck or defective counterbalance valve CB12. Clean valve. Check O-rings on valve. Repair or
replace valve as required.
5. Defective rotary actuator RA1. Check seals on actuator. Replace as necessary.
Replace actuator if defective.
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Skyjack SJ63 AJ+ Specifications

General

Brand	Skyjack
Model	SJ63 AJ+
Category	Boom Lifts
Language	English