
72
SJ519 TH
216942AC
Section 4 – Troubleshooting Information
Hydraulic System
4.
Stuck or defective lift counterbalance valves CB1
Clean valves. Check O-rings on valve. Repair or
replace valve as required
5.
Defective lift cylinder C1
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective
4.3-5 No Telescope Extend
1.
Stuck or defective joystick JS1
Clean valve. Check operation of valve. Repair or
replace valve as required
2.
Stuck or defective extension valve V1
Clean valve. Check operation of valve. Repair or
replace valve as required
3.
Stuck or defective extension counterbalance
valves CB4
Clean valve. Check O-rings on valve. Repair or
replace valve as required
4.
Stuck or defective lift counterbalance valves CB5
Clean valves. Check O-rings on valve. Repair or
replace valve as required
5.
Defective telescope cylinder C4
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective
4.3-6 No Telescope Retract
1.
Stuck or defective joystick JS1
Clean valve. Check operation of valve. Repair or
replace valve as required
2.
Stuck or defective telescope valve V1
Clean valve. Check operation of valve. Repair or
replace valve as required
3.
Stuck or defective lift counterbalance valves CB5
Clean valve. Check O-rings on valve. Repair or
replace valve as required
4.
Stuck or defective lift counterbalance valves CB4
Clean valves. Check O-rings on valve. Repair or
replace valve as required
5.
Defective telescope cylinder C4
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective
4.3-7 No Carriage Tilt Up
1.
Stuck or defective joystick JS1
Clean valve. Check operation of valve. Repair or
replace valve as required
2.
4H-47 stuck or defective
Clean valve. Check operation of valve. Repair or
replace valve as required
3.
Stuck or defective carriage tilt valve V3
Clean valve. Check operation of valve. Repair or
replace valve as required
4.
RV5 misadjusted or defective
Adjust pressure, replace if defective
Summary of Contents for SJ519 TH
Page 1: ...SERVICE MANUAL 216942AC October 2020 ANSI SJ519 TH TELEHANDLERS...
Page 4: ...4 SJ519 TH 216942AC Notes...
Page 22: ...22 SJ519 TH 216942AC Section 1 Scheduled Maintenance Function Tests...
Page 23: ...23 SJ519 TH 216942AC Section 2 Maintenance Tables...
Page 34: ...34 SJ519 TH 216942AC Notes...
Page 35: ...35 SJ519 TH 216942AC Section 3 System Component Identification and Schematics...
Page 40: ...40 SJ519 TH 216942AC Notes...
Page 107: ......
Page 108: ...www skyjack com...