Skyjack SJ85 AJ Service Manual

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SJ85 AJ229044ADA
Section 4 – Troubleshooting Information Hydraulic System
4.3-4 No Turret Rotate
No Turret Rotate Left:
1. Stuck or defective differential sensing valve
DSV1.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
2. Stuck or defective rotate right valve 5H-32. Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Stuck or defective, or misadjusted releif valve
RV2 (stuck open, or leak to tank port).
Adjust valve. Clean valve. Check O-rings on valve.
Check operation of valve. Repair or replace valve
as required.
4. Stuck or defective check valve CV11. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
5. Stuck or defective counterbalance valve CB1
and/or CB2.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
6. Shuttle valve SV5 stuck or defective. Clean valve. Check operation of valve. Repair or
replace valve as required.
7. Defective Swing Drive Brake BR1. Check seals and operation. Repair or replacelace
as necessary.
8. Defective Swing Drive Motor M2. Check seals and operation. Repair or replace as
necessary.
No Turret Rotate Right:
1. Stuck or defective differential sensing valve
DSV1.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
2. Stuck or defective rotate right valve 5H-33. Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Stuck or defective, or misadjusted releif valve
RV2 (stuck open, or leak to tank port).
Adjust valve. Clean valve. Check O-rings on valve.
Check operation of valve. Repair or replace valve
as required.
4. Stuck or defective check valve CV11. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
5. Stuck or defective counterbalance valve CB1
and/or CB2.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
6. Shuttle valve SV5 stuck or defective. Clean valve. Check operation of valve. Repair or
replace valve as required.
7. Defective Swing Drive Brake BR1. Check seals and operation. Repair or replacelace
as necessary.
8. Defective Swing Drive Motor M2. Check seals and operation. Repair or replace as
necessary.
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Skyjack SJ85 AJ Specifications

General

Brand	Skyjack
Model	SJ85 AJ
Category	Boom Lifts
Language	English