Section 4 - Troubleshooting Information
Hydraulic System
4.3 Hydraulic System
4.3-1 All Hydraulic Controls Inoperative (No Lift or Steer functions)
1. Pump motor not engaged
2. Pump motor coupler defective
3. Defective pump P1
Refer to Electrical troubleshooting. Replace pump
motor if defective.
Check coupler. Replace if defective
Check pump output. Replace if defective.
4. System relief valve RV1 set too low or stuck open. Check and adjust valve setting. Replace if
defective.
5. Check valve CV1 stuck closed
4.3-2 No Lift function
1. Stuck or defective lift valve YV3
2. Check valve CV2 stuck closed
4.3-3 No Lower function
3. Stuck or defective lower valve YV3
4. Blocked lower orifice OR1
4.3-4 No steer left and/or right
1. Stuck or defective steer valve YV1 and or YV2
2. Steer cylinder CS bypassing, or mechanically
binding
46
Check valve, Replace if defective
Check valve, Replace if defective
Check valve, Replace if defective
Check valve, Replace if defective
Check orifice Clean orifice or Replace if defective
Check valves, Replace if defective
Check cylinder and all steer linkage. Repair or
replace defective componants as required.
1330ED
&
1530ED micro
GMG
Summary of Contents for 1330-ED
Page 4: ...Notes 4 1330ED 1530ED micro GMG...
Page 24: ......
Page 25: ...Section 2 Maintenance Tables and Diagrams 25 1330ED 1530ED micro GMG...
Page 31: ...Section 3 System Component Identification and Schematics 31 1330ED 1530ED micro GMG...
Page 38: ...Notes 1330ED 1530ED micro GMG...
