Skyjack SJ30ARJE User Manual

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SJ30AJE, SJ30ARJE196274AF
Section 4 – Troubleshooting Information Hydraulic System
4.3-8 No Boom Extend
1. Stuck or defective flow enable valve 2H-20A. Clean valve. Check operation of valve. Repair or
replace valve as required.
2. Stuck or defective boom extend valve 4H-39. Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Stuck or defective relief valve RV4. Set valve to specifications. Check O-rings and
clean valve. Repair or replace valve as required.
4. Stuck or defective counterbalance valve CB3 or
CB4.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
5. Defective extension cylinder C4. Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
4.3-9 No Boom Retract
1. Stuck or defective flow enable valve 2H-20A. Clean valve. Check operation of valve. Repair or
replace valve as required.
2. Stuck or defective boom retract valve 4H-38. Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Stuck or defective counterbalance valve CB3 or
CB4.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
4. Defective extension cylinder C4. Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
4.3-10 No Jib Up
1. Stuck or defective flow enable valve 2H-20A. Clean valve. Check operation of valve. Repair or
replace valve as required.
2. Plugged or defective orifice OR2. Check orifice. Replace if plugged or defective.
3. Stuck or defective jib up valve 4H-35. Clean valve. Check operation of valve. Repair or
replace valve as required.
4. Stuck or defective counterbalance valve CB7 or
CB8.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
5. Defective extension cylinder C5. Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.

Skyjack SJ30ARJE Specifications

General

Brand	Skyjack
Model	SJ30ARJE
Category	Boom Lifts
Language	English