Skyjack SJ1044 TH - No Carriage Tilt

123
SJ1044 TH, SJ1044 THS, SJ1056 TH, SJ1056 THS, SJ1256 THS
230790ABA
Hydraulic System Section 4 – Troubleshooting Information
4. Stuck or defective lift counterbalance valves CB4
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
5. Stuck or defective lift counterbalance valves CB3
Clean valves. Check O-rings on valve. Repair or
replace valve as required.
6. Defective telescope cylinder C5.
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective
4.3-3 No Carriage Tilt
With following conditions:
▪
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 V2.
Clean valve. Check operation of valve. Repair or
replace valve as required.
4. LS check valve CV8 blocked or defective
Clean valve. Check operation of valve. Repair or
replace valve as required
5. Pilot operated check valve CV11 and or CV12
blocked or defective
Clean valve. Check operation of valve. Repair or
replace valve as required
6. RV4 misadjusted or defective Adjust pressure, replace if defective
7. Stuck or defective lift counterbalance valves CB5
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
8. Defective carriage tilt cylinder C7
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective
9. Defective tilt compensation cylinder C6 and/or
C13
Check seals on cylinder. Replace as necessary.
Replace cylinder if defective
With following conditions:
▪
No carriage Tilt Down
1. Stuck or defective joystick JS1
Clean valve. Check operation of valve. Repair or
replace valve as required.
2. 4H-47-1 stuck or defective.
Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Stuck or defective carriage tilt valve V2.
Clean valve. Check operation of valve. Repair or
replace valve as required.
4. LS check valve CV1 blocked or defective
Clean valve. Check operation of valve. Repair or
replace valve as required
5. Pilot operated check valve CV11 and or CV12
blocked or defective
Clean valve. Check operation of valve. Repair or
replace valve as required