SPRING 9T2178 - Caterpillar

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.
Table 1
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    
Table 2
Approximate DEF Consumption Before SCR Replacement    
Engine Model     DEF Consumption    
3516C (1)    
284000 L (75032 US gal)    
3516C (2)    
231000 L (61030 US gal)    
( 1 ) 32.5 percent urea concentration.
( 2 ) 40 percent urea concentration.