REBUILD KIT- 1W7042 - Caterpillar

The C1.7 and the C2.2 engine variant do not have a diesel particulate filter installed within the aftertreatment system.The C1.7 and the C2.2 uses a different technology called, the Diesel Oxidation Catalyst (DOC). This DOC system does not require any scheduled maintenance, and will not be included in the Maintenance Interval Schedule.For the C1.7 and the C2.2 engines to meet emissions regulations the exhaust gases are passed through the DOC. There the gases react with the catalyst. The aftertreatment system can be expected to function properly for the lifetime of the engine (emissions durability period). However for the aftertreatment system to function properly, prescribed maintenance requirements and schedules must be followed.