Catalyst (SCR) - Remove and Install
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Hot engine components can cause injury from burns. Before performing maintenance on the engine, allow the engine and the components to cool. |
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Wear goggles, gloves, protective clothing, and a National Institute for Occupational Safety and Health (NIOSH) approved P95 or N95 half-face respirator when handling a used Diesel Particulate Filter or Catalytic Converter Muffler. Failure to do so could result in personal injury. |
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| Required Tools | |||
| Tool | Part Number | Part Description | Qty |
| A | 399-9725 | Handle As | 1 |
| B | Loctite™ Nickel Anti-Seize | - | |
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| Illustration 1 | g06278098 |
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| Illustration 2 | g06278114 |
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| Illustration 3 | g06278119 |
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| Illustration 4 | g06278126 |
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Repeat for inner catalyst | |
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| Illustration 5 | g06278134 |
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Install the rear seal between the tube and the inner catalyst assembly . | |
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| Illustration 6 | g06278141 |
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Install the outer catalyst seal between the inner and outer catalyst assemblies. | |
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| Illustration 7 | g06278143 |
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| Illustration 8 | g06278156 |
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| Illustration 9 | g06278160 |
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| Illustration 10 | g06278163 |
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| Illustration 11 | g06278165 |
Note: Tighten the cover bolts starting in the middle and working towards the corners.
Caterpillar Information System:
307.5, 308, 308.5, 309, and 310 Mini Hydraulic Excavators Monitoring System
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