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Tag: Ray Schroth

DPFs and DOCs: The new components at the heart of your Tier 4 engine

Plumbed into the exhaust stream of many diesel powered off-road machines you buy today is either a diesel oxidation catalyst (DOC) or a diesel particulate filter (DPF) or both. While there has been much talk and concern over these changes, the reality is that these engines and their emissions control systems are here to stay. […]

August 27, 2012

Ultra-low sulfur diesel must be used in DOCs to prevent the sulfur from “poisoning” the catalysts. Low-ash, API CJ-4 lube oil should be used to prevent ash from building up in the DPF.

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