Bobcat Hydraulic Oil Temperature High
The BOBCAT-M0311 (Bobcat) diesel fault code means: Bobcat Hydraulic Oil Temperature High. This is a serious severity code.
- Keep driving?
- No -- stop driving
- DIY difficulty
- intermediate
- Estimated cost
- $0-$2,500
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Common Symptoms
- Hydraulic temp lamp red
- Slow cycle times as machine protects
Probable Causes (Ranked by Likelihood)
- Plugged hydraulic oil cooler fins Very Likely
- Hydrostat relief valve failure generating heat Possible
- Low hydraulic oil level Possible
Step-by-Step Diagnostic Procedure
Clean cooler core from inside out with low-pressure air.
Check hydraulic oil level and condition.
Scan hydrostat pressures during drive to confirm no internal bypass.
Frequently Asked Questions
What is Bobcat code M0311?
Bobcat M0311: Bobcat Hydraulic Oil Temperature High. This code is reported on Bobcat equipment running the described engine family.
Can I keep working with Bobcat code M0311?
Do not continue operating. Risk of engine damage or unsafe shutdown.
How much does Bobcat M0311 cost to fix?
Typical repair cost: $0-$2,500. Off-road diesel shop labor runs $125-$175/hr in 2026. Dealer diagnostic software (Bobcat Service Analyzer) is usually required.