fuel tank, selector valve and remote for MKII Carrier

[Jacques Reed]

Thanks Lynn, Always glad to contribute to the knowledge base.

As a matter of interest I was pretty certain they were NPT threads on the fitting and not BSP as the origin of the vehicle was North America. I thought I better check anyway as Canada being a Commonwealth country they could be BSP. We all know how many different thread forms are sometimes used on our MV's.

I tried measuring against a 1/8 BSP tap but that was inconclusive as I could only engage about 3 thread due to the first three engagement threads of the tap being reduced height. I then set my Vernier to 5/27" (0.185") NPT size and compared the five threads against it as per photo. Again, inconclusive as 5 BSP threads would be a distance of 0.179". My old eyes cannot distinguish 0.006" difference on an old fitting.

I then remembered the major diameters are different and measured the fitting. Sure enough, the fitting is 0.403 diameter at midpoint of the threads.
I put the Vernier across the BSP tap and it passed through with out even getting close to the sides as the major diameter of 1/8 BSP is 0.383"

Always more than one way to figure something out.

Hope this is of some interest.

[RichardT10829]

Where the valve mounts the the hull, on my example I noted a bracket which I took to be for a spring ? Does anyone have information on how that spring was fitted ?

[Robert Bergeron]

Thank you Jacques and sorry for the delay . I was side tracked by an unexpected piece of legislation in Canada .... Nice job . I will try it out and post . Richard , a picture would help . Cheers.

[Robert Bergeron]

Jacques : 1/8 NPT fittings work fantastic ! Thanks . Richard : Are you talking about the spring that helps the selector valve open and close with the very long actuating arm ?

[Ron Pier]

I can't think what a spring would do? Wouldn't it bias the action one way or the other? Ron

[Lynn Eades]

Does it compensate for the weight of parts of the linkage?

[Ron Pier]

As we know, the MK2 change over valve is operated from the driving compartment. There is no spring shown in the illustration or listed in the parts list. Ron