3 Cylinder Injector Seal Kit With Heat Shield for Kubota Engine D722 D902 D1005 D1105 D1703 Bobcat Loader S100 S150 S160 S175 S185 S70
This fuel injector seal kit contains the gaskets, O-rings, and copper washers needed to properly seal the fuel injectors on Kubota Engine D722 D902 D1005 D1105 D1703 Bobcat Loader S100 S150 S160 S175 S185 S70. Over time, the copper sealing washers crush and the rubber O-rings harden, which allows combustion gases to escape and fuel to leak. Replacing the seals during any injector service is standard practice.
Vehicle Compatibility
| Application | Details |
|---|---|
| cat Excavator | See product specifications |
| cat Skid Steer Loader | See product specifications |
| cat Compact Track Loader | See product specifications |
| cat Utility Vehicle | See product specifications |
| cat Work Machine | See product specifications |
| cat Portable Power | See product specifications |
| cat Backhoe Loader | See product specifications |
| Bobcat Excavator | See product specifications |
| Bobcat Skid Steer Loader | See product specifications |
| Bobcat Compact Track Loader | See product specifications |
| Bobcat Utility Vehicle | See product specifications |
| Bobcat Work Machine | See product specifications |
Replaces OEM Part Numbers
6655218 • 6655872 • 6672414 • Kubota • Engine • D1005 • D1005-E3B-BC-3 • D1105 • D1703 • D1703-E2B • D1703-M-E3B • Interim
Signs You Need a Replacement
If your equipment is showing any of these symptoms, the injector seal kit may be the cause:
- Fuel leak around the injector — copper washer is no longer sealing properly
- Combustion gases escaping — hissing sound near the injector when the engine runs
- Carbon buildup on injector exterior — hot gases cooking the fuel around a bad seal
- Rough idle on one cylinder — combustion pressure leak affecting that cylinder
Installation Notes
Always use new copper sealing washers from the kit — never reuse old ones. The copper crushes to form the seal, and a used washer has already been compressed. Clean the injector bore in the cylinder head before installing the injector. Carbon buildup prevents proper seating and causes combustion gas leaks. Torque the injector hold-down bolts to spec in a crisscross pattern.
Frequently Asked Questions
Will this fit my Bobcat D722?
Yes. This part is designed to fit the Bobcat D722, D902, D1005, D1105 among other models listed in the compatibility table above. Verify your specific model and engine code before ordering to ensure the correct fit.
Can I cross-reference 6655218 with 6655872?
Yes. Both 6655218 and 6655872 are interchangeable OEM numbers for this part. They refer to the same component with the same specifications, just different part number revisions. This replacement fits all applications listed for either number.
How do I check if my engine code (DX10Z, DX17Z, DX19, MT50) matches?
The engine code is stamped on a metal tag attached to the engine block, usually near the timing belt cover or on the cylinder head. Compare the code you find with the list above. Engine codes are 3 to 6 characters long and use a combination of letters and numbers.
Do I need to replace the seals when removing injectors?
Yes. The copper sealing washers are single-use — they crush to form the seal and cannot be reused. Rubber O-rings harden over time from heat and fuel exposure. Even if the old seals look fine, they won’t seal properly on reassembly. This kit has everything needed for a proper job.
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