BOBCAT-M0311 serious Bobcat ›

Bobcat Hydraulic Oil Temperature High

The BOBCAT-M0311 (Bobcat) diesel fault code means: Bobcat Hydraulic Oil Temperature High. This is a serious severity code.

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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

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?

Estimated 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.

Mechanics Guide Step-by-step diagnosis

Step-by-Step Diagnostic Procedure

  1. Clean cooler core from inside out with low-pressure air.

  2. Check hydraulic oil level and condition.

  3. Scan hydrostat pressures during drive to confirm no internal bypass.

Commonly Affected Vehicles

  • Bobcat S650 skid steer loader (Kubota V3800)
  • Bobcat S740 / S750 / S770 / S850 skid steer loaders (Kubota V3800)
  • Bobcat T650 / T750 / T770 / T870 compact track loaders (Kubota V3800)
  • Bobcat E50 / E55 / E60 / E85 mini excavators (Kubota V3800)
  • Bobcat UW56 utility vehicle (Kubota V3800)

Related Codes

BOBCAT-P0217

Explore More

More Bobcat codes → Diesel home All diesel codes Heavy-duty Guides

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