71
SJ519 TH
216942AC
Hydraulic System
Section 4 – Troubleshooting Information
4.3 Hydraulic System
4.3-1 All Controls inoperative
1.
Worn or defective pump shaft or coupling
Check pump shaft and coupling. Replace if
defective
2.
Hydraulic oil level low
Check oil level. Fill to proper level
3.
Charge pump P1A is defective
Repair or replace if defective
4.
RV6 misadjusted or defective
Adjust pressure, replace if defective
4.3-2 All Boom Functions Inoperative
1.
System pump P2 is defective
Repair or replace if defective
2.
RV1 misadjusted or defective
Adjust pressure, replace if defective
3.
EC1 defective
Replace if defective
4.3-3 No Boom Raise
1.
Stuck or defective joystick JS1
Clean valve. Check operation of valve. Repair or
replace valve as required
2.
Stuck or defective lift valve V4
Clean valve. Check operation of valve. Repair or
replace valve as required
3.
Stuck or defective lift counterbalance valves CB1
Clean valve. Check O-rings on valve. Repair or
replace valve as required
4.
Stuck or defective lift counterbalance valves CB2
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
4.3-4 No Boom Lower
1.
Stuck or defective joystick JS1
Clean valve. Check operation of valve. Repair or
replace valve as required
2.
Stuck or defective lift valve V4
Clean valve. Check operation of valve. Repair or
replace valve as required
3.
Stuck or defective lift counterbalance valves CB2
Clean valve. Check O-rings on valve. Repair or
replace valve as required
Содержание SJ519 TH
Страница 1: ...SERVICE MANUAL 216942AC October 2020 ANSI SJ519 TH TELEHANDLERS...
Страница 4: ...4 SJ519 TH 216942AC Notes...
Страница 22: ...22 SJ519 TH 216942AC Section 1 Scheduled Maintenance Function Tests...
Страница 23: ...23 SJ519 TH 216942AC Section 2 Maintenance Tables...
Страница 34: ...34 SJ519 TH 216942AC Notes...
Страница 35: ...35 SJ519 TH 216942AC Section 3 System Component Identification and Schematics...
Страница 40: ...40 SJ519 TH 216942AC Notes...
Страница 107: ......
Страница 108: ...www skyjack com...