Skyjack SJ63 AJ+ Service Manual

179
SJ63 AJ+, SJ63 AJ 229043AAA
Hydraulic System - ANSI/CSA Section 4 – Troubleshooting Information
4.5-12 No Jib Down
1. Stuck or defective flow enable valve 2H-42. Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
2. Stuck or defective check valve CV8. Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Stuck or defective jib down valve 4H-34. 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.
4.5-13 No Platform Rotation Right
1. Stuck or defective flow enable valve 2H-42. Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
2. Stuck or defective check valve CV8. Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Stuck or defective platform rotate right valve 4H-
37.
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 actuator. Repair or replace as necessary.
4.5-14 No Platform Rotation Left
1. Stuck or defective flow enable valve 2H-42. Clean valve. Check O-rings on valve. Check opera-
tion of valve. Repair or replace valve as required.
2. Stuck or defective check valve CV8. Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Stuck or defective platform rotate right valve 4H-
36.
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 actuator. Repair or replace as necessary.
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Skyjack SJ63 AJ+ Specifications

General

Brand	Skyjack
Model	SJ63 AJ+
Category	Boom Lifts
Language	English