Skyjack SJ63 AJ+ Service Manual

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SJ63 AJ+, SJ63 AJ 229043AAA
Hydraulic System - ANSI/CSA Section 4 – Troubleshooting Information
8. Stuck or defective check valve CV4. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
9. Defective leveling cylinder C4 or slave cylinder
C5.
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
4.5-17 The Brake will not Release
1. Stuck or defective shuttle valve SV3. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
2. Defective or misadjusted pressure reducing valve
PR1.
Set valve to specifications. Check O-rings and
clean valve. Repair or replace valve as required.
3. Stuck or defective brake valve 3H-26. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
4. Stuck or defective shuttle valve SV2. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
5. Defective or misadjusted relief valve RV7. Set valve to specifications. Check O-rings and
clean valve. Repair or replace valve as required.
6. Stuck or defective brake release override valve
V1.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
7. Bypassing or defective brake hand pump MP. Clean valve. Check O-rings on valve. Repair or
replace valve as required.
8. Bypassing or defective brake cylinder C11 or
C12.
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective
4.5-18 The Brake will not Engage
1. Brake cylinder defective. Check cylinders. Repair or replace as necessary.
2. Brake valve 3H-26 stuck in shifted position. Check valve. Replace if defective.
3. Brake inside axle out of adjustment. See section 5 for brake adjustment procedure.
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Skyjack SJ63 AJ+ Specifications

General

Brand	Skyjack
Model	SJ63 AJ+
Category	Boom Lifts
Language	English