Cleaning your Hydraulic Connections/Connectors

[oosik]

I've used WD40. When finished cleaning and fittings are reconnected - wrap a shop rag around each fitting and leave it wrapped for a week or so. The rag will absorb any excess WD40 and prevent the accumulation of dust and dirt directly on the fitting. Hold each rag in place with rubber bands.

 

[IndyJay]

I usually use starting fluid to clean them out.

I thought you weren't supposed to use starting fluid on diesel tractors?