Skyjack SJ6826RT - Drive Inoperative; Drive Sluggish; Reverse Drive Inoperative; Forward Drive Inoperative

123
SJ6826RT, SJ6832RT
213560ABA
Hydraulic Systems Section 4 – Troubleshooting Information
4.3-5 Drive Inoperative
1. Stuck or defective Reverse Drive Valve solenoid
4H-15A and/or Forward Drive Valve solenoid 4H-16A.
Check valves. Repair or replace if defective.
2. Drive Relief Valve R5 defective or not adjusted
properly.
Adjust valve. Replace if defective.
3. Stuck or defective Main Counterbalance Valve CB1. Check valve. Repair or replace if defective.
4. Defective Drive Motors M1, M2, M3 and/or M4. Check motors. Repair or replace if defective.
5. Freewheel Valve V2 open or defective. Close valve. Repair or replace if defective.
6. Stuck or defective High Speed Valve 2H-20B. Check valve. Repair or replace if defective.
7. Cushion Cylinder C8 bypassing internally. Check cylinder. Repair or replace if defective.
4.3-6 Drive Sluggish
1. Stuck open or defective Check Valve CV3, CV4, CV5,
and/or CV6.
Check Valves. Replace if defective.
2. Drive Relief Valve R5 set too low. Refer to Section 5 of this manual for setup procedure.
3. Defective Flow Divider FD1. Check valve. Replace if defective.
4.3-7 Reverse Drive Inoperative
1. Stuck or defective Reverse Drive Valve 4H-15A. Check valve. Repair or replace if defective.
4.3-8 Forward Drive Inoperative
1. Stuck or defective Forward Drive Valve 4H-16A. Check valve. Repair or replace if defective.
4.3-9 Drive Inoperative When in Low Drive
1. Stuck or defective Parallel Counterbalance Valve CB2. Check valve. Replace if defective.
2. Stuck or defective Parallel Forward Drive Valve 4H-16B
or Parallel Reverse Drive Valve 4H-15B.
Check valves. Replace if defective.
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