Catalyst (SCR) - Replace
Refer to the Disassembly and Assembly Manual for information on catalyst replacement.
In order to maximize catalyst life, Caterpillar recommends that the catalysts are replaced based on either engine load factors and service hours or DEF consumption. Refer to table 1 for catalyst replacement based on load factor and service hours. Refer to table 2 for catalyst replacement based on DEF consumption.
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| SCR Replacement Intervals Based on Average Load Factor and Hours | |||||
| Average Application Load Factor (%) | 10 | 25 | 50 | 75 | 100 |
| SCR Replacement Interval (hrs) | 20,000 | 16,000 | 13,000 | 11,000 | 10,000 |
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| Approximate DEF Consumption Before SCR Replacement | |
| Engine Model | DEF Consumption |
| 3516C (1) | 284000 L (75032 US gal) |
| 3516C (2) | 231000 L (61030 US gal) |
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| ( 1 ) | 32.5 percent urea concentration. |
| ( 2 ) | 40 percent urea concentration. |
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