Cummins/Onan — Heavy Duty Air Cleaner Service
Maintenance · Air cleaner (heavy duty)
From a Cummins/Onan owner's manual covering: 4A2.3, 4A2.3-GS/GC, 6A3.4-GS/GC-1, 6A3.4-GS/GC-2, 6AT3.4-GS/GC, ES-1788. Check it applies to your exact model before use.
Applies to: Cummins/Onan ES-1788, Cummins/Onan 4A2.3 engine
Before you start
- Do not reuse element more than twice. If element has a small hole, replace it.
Procedure
- Remove dust cap.
- Clean dust and debris from rubber dust collector in cap.
- Remove wing nut and air filter element.
- Clean by directing dry, clean, low-pressure air (30 psi/207 kPa) up and down pleats on inside of element.
- If extremely dirty, wash by soaking in mild detergent and water for 15 minutes, then rinse thoroughly.
- Air dry element for minimum 24 hours; do not dry with compressed air or at temperatures greater than 150°F (66°C).
- Reassemble, making certain dust cap side marked TOP is facing out.
Specs & values
- Cleaning air pressure: 30 psi (207 kPa)
- Air dry time: minimum 24 hours
- Maximum drying temperature: 150°F (66°C)
Full service-parts list: Cummins/Onan ES-1788 →
Source: Cummins/Onan 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.