191
229042ABASJ46 AJ+, SJ46 AJ, SJ51 AJ
Hydraulic System Section 4 – Troubleshooting Information
4.5-27 No Reverse Drive
1. Defective pump displacement control 4H-15. Check control. Replace if defective.
2. Defective or misadjusted drive relief valve RV2. See section 5 for drive pump set up procedures.
3. Drive pump servo stuck or not shifting. Check pump. Replace if defective.
4.5-28 No High Speed Drive
1. Stuck or defective 2 speed valve 3H-45. Clean valve. Check O-rings on valve. Check
operation of valve. Repair or replace valve as
required.
2. Defective shift spool in drive motor M1. Check motor. Repair or replace if necessary.
4.5-29 No Right Steer
1. Plugged, incorrectly adjusted or defective priority
flow control PFC1.
Check operation. Set flow rate to 1.25 GPM @ 2000
psi. Replace if plugged or defective.
2. Stuck or defective right steer valve 4H-23A. Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Defective steer cylinder C8. Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
4.5-30 No Left Steer
1. Plugged, incorrectly adjusted or defective priority
flow control PFC1.
Check operation. Set flow rate to 1.25 GPM @ 2000
psi. Replace if plugged or defective.
2. Stuck or defective left steer valve 4H-24A. Clean valve. Check operation of valve. Repair or
replace valve as required.
3. Defective steer cylinder C8. Check seals on cylinder. Replace as necessary.
Replace cylinder if defective.
4.5-31 Axle Will Not Oscillate
NOTE
Axle will only oscillate when boom is fully retracted and is horizontal or below.
1. Stuck or defective axle lockout valve 3H-65. Clean valve. Check O-rings on valve. Repair or
replace valve as required.
2. One or more counterbalance valves (CB1 or CB2)
failed to shift or is defective.
Clean valve. Check O-rings on valve. Repair or
replace valve as required.
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