Exhaust Filter System Overview

NOTE: Operator display icons and procedures can vary in other applications. The information contained in this section specifically applies to only OEM engines using the diagnostic gauge. If you are operating a John Deere vehicle, please see the vehicle operator manual for all exhaust filter cleaning operation information and procedures.

RE537721TMDA02-UN-04MAR10

Diesel Exhaust Filter

A - Diesel Exhaust Filter

B - Diesel Particulate Filter (DPF)

C - Diesel Oxidation Catalyst (DOC)

John Deere has developed an exhaust filter consisting of a diesel oxidation catalyst (DOC) and a diesel particulate filter (DPF) specifically to meet the demands of off-highway applications. The DOC reduces carbon monoxide, hydrocarbons, and some particulate matter. The downstream DPF traps and holds particulates remaining in the exhaust stream. Trapped particles are eventually oxidized within the DPF through a process known as regeneration or exhaust filter cleaning.

Under normal machine operation and with the system in AUTO mode, the exhaust filter system requires minimal operator interaction.

To avoid unnecessary buildup of diesel particulates or soot in the exhaust filter system;

1 - Utilize the Automatic (AUTO) Exhaust Filter Cleaning mode.
2 - Avoid unnecessary idling.
3 - Use proper engine oil (See Fuels, Lubricants, and Coolants section for recommendations).
4 - Use only ultra low sulfur fuel (See Fuels, Lubricants, and Coolants section for recommendations).

In addition to soot, ash deposits will also slowly build up in the DPF and cannot be removed through the engine exhaust filter cleaning process. To clean the ash deposits from the DPF see the information on Exhaust Filter Service Required later in this section.

CAUTION: Do not power wash the filter assembly when external skin temperature of assembly exceeds 50° C (120° F).