Diamond T 969 fuel cap

[Maurice Donckers]

The fuel tank neck must have been changed at one time , the Americans only had 3 sizes , 2 fuel cap sizes , all early ones were 2", 980/981 stayed that way , and the bigger one , the 3rd was a radiator cap size .
looked at the Matchles in our collection , and that has a 75mm neck with your cap on .

[Maurice Donckers]

Last picture shows Matchles tank cap.

[jack neville]

Thanks Maurice. Just for interest can you get a close up of the inside of the Matchless cap and the neck. I had another look at my tank and you can see from the above picture that the neck on mine is at the edge of the tank pointing out on an angle and not on the top flat part of the tank. I cant see anywhere where the 2" neck would have been removed and the hole blanked off, but I haven't removed the tank either as yet so I don't know what else could be revealed under the tank guard/step panel.

[Maurice Donckers]

G3L picture attached

[jack neville]

Thanks Maurice. No doubt about it now. Those caps are definitely the same. Now the question is why would Australian Diamond T's have had a change of fuel tank? (Talking about two I know of and waiting on someone to check the wrecker at Bandiana). And why would you change to a motor cycle tank neck and cap? Especially since the standardized tank of later war years had the four inch cap. I know some of the Australian Diamond T's with the early civvy gauges had the gauge holes blanked off and re cut to take the standard military gauges.

[Darrin Wright]

Jack, I was in Bandiana for work and stopped in to the museum to photograph the Ford WOT and took some pics of fuel caps for you.
The museum Diamond T fuel fillers are all the same and there a 2 types/variations of caps, but all the same diameter and locking lugs/tangs.
Checked both the wreckers and tank transporter.

[jack neville]

Thanks Darrin.

Seems they also have had a change of fuel gauge sender