BOBCAT-CODE-18 moderate Bobcat ›

Bobcat Operator Display Code 18 - Hydraulic Filter Restriction

The BOBCAT-CODE-18 (Bobcat) diesel fault code means: Bobcat Operator Display Code 18 - Hydraulic Filter Restriction. This is a moderate severity code.

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Keep driving?
Yes, but fix soon
DIY difficulty
intermediate
Estimated cost
$0-$2,500 depending on sub-system
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Common Symptoms

  • Slow function when cold

Probable Causes (Ranked by Likelihood)

  • See specific cluster advice for this code family Varies
  • Harness / sensor fault in affected system Likely

Frequently Asked Questions

What is Bobcat code CODE-18?

Bobcat CODE-18: Bobcat Operator Display Code 18 - Hydraulic Filter Restriction. This code is reported on Bobcat equipment running the described engine family.

Can I keep working with Bobcat code CODE-18?

Usually drivable short-term, but fix soon to avoid derate or DPF issues.

How much does Bobcat CODE-18 cost to fix?

Estimated repair cost: $0-$2,500 depending on sub-system. 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. Refer to Bobcat Operation & Maintenance Manual code list.

  2. Replace hydraulic return filter.

  3. If persistent, connect Bobcat Service Analyzer for full SPN/FMI.

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)
  • Bobcat S630 / S650 skid steer loaders (Doosan D24)
  • Bobcat S770 / S850 skid steer loaders (Doosan D34)
  • Bobcat T630 / T650 / T870 compact track loaders (Doosan D24/D34)
  • Bobcat E55 / E85 mini excavators (Doosan D24)

Explore More

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

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