Applicable Systems
9R Tractor
Symptoms
Hydraulic oil filter restriction warning; hydraulic system pressure may be reduced.
Possible Causes
- Hydraulic filter element clogged
- Filter service interval exceeded
- Hydraulic oil contamination
Troubleshooting Steps
- Step 1: Check hydraulic filter service hours
Filter within service interval (500hr) - Step 2: Inspect filter element for contamination (cut open)
No excessive debris - Step 3: Check hydraulic oil condition (dark/burnt = bad)
Oil clean, normal amber color - Step 4: Replace hydraulic filter element
New filter installed and primed - Step 5: Clear code and verify hydraulic pressure
Pressure within spec, no restriction
How to Reset
Clear via Service Advisor after filter replacement.
Common Replacement Parts
- Hydraulic Filter P/N: AH128449
Frequently Asked Questions
- Q: What causes hydraulic filter restriction?
Normal contamination buildup over time, or sudden restriction from component failure (pump wear, seal degradation). Check oil condition if premature clogging.
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Source: johndeerefaultcodes.com + deere.com filter specs
Category: Heavy Equipment
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