Fuel Pump Diaphragm Rod Differences?

[4Cruisers]

Were there different types of end features on the F engine and early 2F engine fuel pump diaphragm rods - the feature that captures the pump arm?

The photo shows one type, but the one I had was tee-shaped, without a hole, as shown in @red66toy's rebuild video:

Rebuilding a F engine mechanical fuel pump

Hey everyone! Happy New Year. I just made a video on how to rebuild a mechanical fuel pump for the F and 2F engine. Not a hard job at all! :) Rebuilding the old worn out pumps is truly rewarding as most of the pump can be reused, just replace the old rubber parts and you are good to go. You can...

forum.ih8mud.com

 

[red66toy]

Interesting, I have not see that end. The diaphragms between the early 60s pump and the late 70s pump were almost identical... even that rod T.

 

[4Cruisers]

I found this image on a forklift website:

 

[Living in the Past]

Is it possible one is for the earlier style with the hand primer? I have taken a fuel pump apart in a few years. Never torn down the one with and without the hand primer at the same time.

 

[red66toy]

I found this image on a forklift website:

View attachment 2929198

Ah yeah the forklift websites have weird stuff sometimes. Not saying a 40 pump didn’t have that loop end, but they can have incorrect parts listed.

 

[4Cruisers]

And for a Toyota Liteace:

 

[red66toy]

Hey @4Cruisers I found more info on that odd hook diaphragm! It looks like the 25/28 had that style rod end and some of the very early 40 series. I am not sure on the exact date of the transition to the more ubiquitous T-end rod. I met a guy last night with a real survivor 1962 FJ40 and his fuel pump had the early hook style. So I am guessing maybe a transition around 62/63? Hopefully someone has some parts books around those years.

 

[4Cruisers]

Thanks for the follow-up! Good information.

 

[4Cruisers]

@leafsprung

 

[Living in the Past]

Think I mentioned the early hand primer pumps in post 4. Think this style ended around 1965.

 

[red66toy]

I think the transition was within the hand primer pump era. All my hand primer pumps have the T-shaped rod end.