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Hydraulic System Section 4 – Troubleshooting Information
6. Stuck or defective counterbalance valve CB14. Clean valve. Check O-rings on valve. Repair or
replace valve as required.
7. Stuck or defective check valve CV17. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
8. Stuck or defective shuttle valve SV4. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
9. Return valve V4 stuck in the closed position or is
defective.
Clean valve. Check operation of valve. Repair or
replace valve as required.
10. Defective lift cylinder C1. Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
No Main Boom Up:
1. Stuck or defective differential sensing valve
DSV3.
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
2. Stuck or defective boom down valve 4H-13. Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Stuck or defective valve V4 (stuck open, or leak
to tank port).
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
4. Stuck or defective releif valve RV5 (stuck open, or
leak to tank port).
Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
5. Stuck or defective check valve CV13. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
6. Stuck or defective counterbalance valve CB3. Clean valve. Check O-rings on valve. Repair or
replace valve as required.
7. Return valve V6 stuck in the closed position or is
defective.
Clean valve. Check operation of valve. Repair or
replace valve as required.
8. Defective lift cylinder C1. Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
To order go to Discount-Equipment.com
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