Early oil tank banjo feed and return

Does anyone know why the early oil tank banjo feed and return has spigots and what kind of clamp was used to secure the hoses, if they used ferrules or some other clamp, thanks David
(1969 Commando S)

David,
I saw this 69 S Type in almost original state back in 2016 in Switzerland.
The oilhoses are secured with crimped on ferrules.
Looks like the owner has fitted an extra oil filter like from the later models.
I used regular hose clamps to fix them to the junctions on my bike.
I guess if you use these ferrules you cannot fit the hoses separatly. You have to fit the whole assembly to the bike.

rivera said:

David,
I saw this 69 S Type in almost original state back in 2016 in Switzerland.
The oilhoses are secured with crimped on ferrules.
Looks like the owner has fitted an extra oil filter like from the later models.
I used regular hose clamps to fix them to the junctions on my bike.
I guess if you use these ferrules you cannot fit the hoses separatly. You have to fit the whole assembly to the bike.

Click to expand...

Thanks for those images Rivera

David, I use a pair of black double barbed plastic hose clamps on my oil tank banjo hoses. They are very secure, black so they blend right in with the black hose and easy to disengage from the oil junction block pipe in order to drain the oil from the tank when it's oil change time.



I use a pair of these clamps on each end of every hose from McMaster-Carr pictured below. They are tough to see in the image above. (they are black so blend in with the hose) I don't recall the size I bought, but I use the appropriate sizes on fuel lines as well as my oil lines.



Edited to add: The real headache with the central oil tank is oil changes. The removable plastic clamps I use allow me to pop the oil feed hose off the oil junction block pipe to drain the oil tank, eliminating much of the mess. Every few oil changes I swab out the tank. I'm not sure how people with crimped hoses drain their oil tank without making a huge mess.... The crimped hose is on the rivet counter's list of proper factory hardware, but it doesn't do you any favors come oil change time.

FWIW

My Atlas originally had crimped ferrules, but as rivera says, with crimped fittings you have to fit the whole assembly to the bike.

I recently took a cue from worntorn and tried pushing on ferrule capped (but not crimped) hoses. It seems to be working out ... no leaks thus far.

I used a hose 0.5" OD x 5/16" ID, with ferrules 0.475" ID. The lower fitting (on the oil junction block) was a tough push on as the hose material had to be compressed to go over the tube, but it was possible to push it on about 3/4". The upper fitting (to the oil tank) had to pass over a barb in the tube descending from the oil tank. There was no way to compress the hose material enough to push it on, so I modified the upper fitting as follows:

I bell mouthed the ferrule (after drilling out the end hole to pass over the barb) and placed it on the tube from the tank. While holding the ferrule uppermost on the tank tube, I pushed the bare hose end over the barb, then pushed the ferrule on to the hose end as far as I could. This tightened the hose end on the tube, while the barb makes the seal.

The finished result looks like the original.

Slick