Cummins ISLe3 & ISLe4 Engine Operation and Maintenance Manual

The ISLe3 and ISLe4 are Cummins' 8.9 litre L-series engines built to Euro 3 and Euro 4 emissions standards for trucks, buses and coaches. This is their Operation and Maintenance Manual.

It covers engine identification, scheduled maintenance and intervals, recommended oils, filters and coolant, torque values for service fasteners, and cold-weather starting and storage. Fleet workshops use it to plan service schedules.

What the manual covers

• Engine and system identification
• Scheduled maintenance intervals and procedures
• Recommended oils, filters and coolant
• Torque values for service fasteners
• Cold-weather starting and storage

Compatibility

• Models: ISLe3, ISLe4
• Engine: 8.9 L inline six
• Emissions: Euro 3 (ISLe3), Euro 4 (ISLe4)
• Manual type: Operation and maintenance manual

Before you buy

A shorter owner's manual for drivers is listed separately. This O&M manual has the intervals and specs a workshop needs.

Your engine's dataplate shows the engine model, the engine serial number (ESN) and the CPL number. Compare those with the models above. If you're not sure, email us the dataplate details and we'll check for you.

File format

Digital download, delivered as a ZIP file. Unzip it before opening. Opens on a computer, tablet or phone.

We're an independent seller and are not affiliated with or endorsed by Cummins. Brand and model names are used only to identify the engines this manual covers.