I wouldn't soak the assembly in anything, that won't get rid of the sludge .... see the tech tip, don't need to mess with the odometer, but the gears that drive things are easily accessible, and they're the main thing that need cleaning and light lubrication .... the needles are available at any of the vendors

Bill

Moved over to the Passing Lane

"When we tug a single thing in nature, we find it attached to the rest of the world" ~ John Muir
"When we tug a single thing on an old truck, we find it falls off" ~ me
Some TF series details & TF heater pics