Generac — Forcing a Manual Exhaust After-Treatment Cleaning
Operation · SCR / after-treatment system
From a Generac owner's manual covering: MDG150, MDG175, MDG250. Check it applies to your exact model before use.
Applies to: Generac MDG150, Generac MDG175, Generac MDG250, John Deere 6068HFG05 / 6068HFG06 engine
Before you start
- Always park the unit in a safe location for elevated exhaust temperatures and check for adequate fuel level before starting cleaning.
- Risk of Burn. Stay clear of the exhaust system during operation and exhaust filter cleaning.
Procedure
- Open the control door and locate the switch labeled REGEN INHIBIT.
- Set and hold the switch in ON/FORCED (I) for five seconds.
- Enter the SCR status screen and verify the regeneration indicator appears above SCR LAMP - SOLID.
Specs & values
- Cleaning cycle duration approximately 45 minutes
Full service-parts list: Generac MDG150 →, Generac MDG175 →, Generac MDG250 →, John Deere 6068HFG05 / 6068HFG06 engine →
Source: Generac owner's manual. Steps and values are as documented; always cross-check against the official manual and any later revisions for your exact serial number before servicing.