Old Britts – Oil Lines on a Commando
Download the complete PDF version using the green download button at the top right of this page for detailed Norton Commando oil system and oil line routing information. This technical article by Fred Eaton explains how the Norton Commando oil system functions and shows the correct routing of the oil feed, return, breather and rocker feed lines using detailed diagrams and workshop notes.
The guide covers oil tank fittings, engine breather locations for different Commando model years, oil tank breather routing, feed and return oil line connections and chain oiler system operation.
Detailed explanations are included covering common hose routing mistakes, catch bottle setup recommendations, oil filter routing and the correct installation points for anti-wet sumping check valves.
The article also explains the differences between early square oil tanks and later Commando oil tank designs while providing practical maintenance guidance for restoring or servicing Norton oil systems.
Contents Include
- Complete Norton Commando oil system overview
- Oil feed and return line routing
- Engine breather location guide
- Oil tank breather routing information
- Rocker feed line routing
- Oil junction block connections
- Oil filter routing procedures
- Anti-wet sumping valve installation guidance
- Chain oiler system explanation
- Early and late oil tank differences
- Catch bottle setup recommendations
- Detailed oil system diagrams
Covered Norton Models
- Norton Commando 750
- Norton Commando 850
- Norton Roadster
- Norton Interstate
- Norton Fastback
- Norton Hi-Rider
- Norton MK3
