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Early Version Dual Action Fuel Pump Rebuild Kit
Fits 50-66 M38, M38A1

Part # 811396

NOS Military Fuel Pump Rebuild Kit

Kit includes valves, screens and gaskets
Single Action Fuel Pump Rebuild Kit  

Early fuel pump repair kit for the orignal dual action fuel pumps used on the M38 and M38A1

There were two different versions of fuel pumps used on these vehicles. You MUST take apart your old fuel pump prior to ordering this kit and confirm your internal components are the same as in the images provided. This is the early version only.

4-134 engine

50-52 M38
52-66 M38A1

Part # Price





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Questions & Answers

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Does this work for the 735994 dual action fuel pump?

Willys Jeep Parts Tech:
No it does not work for that fuel pump.

What if I have a fuel pump that is the later version, do you have the parts to rebuild this pump??

Willys Jeep Parts Tech:
We can rebuild yours. Please call us toll free.

This kit looks correct for the fuel pump I have but what makes it different then the other version? Also the previous person asked about the rocker arm pin. To remove it you need to destroy it so is there a replacement available else where on your website?

Willys Jeep Parts Tech:
Some of the components are slightly different and will not interchange. You have to make sure your parts are exactly as shown. There are early and late versions.

Is the fuel pump rocker arm pivot pin included? I see the rocker arm pivot pin washer and rocker arm spring in the kit photo but not the actual pin. If not included where can it be sourced?

Willys Jeep Parts Tech:
Just what is shown in the photo is what is available in these kits.

I ordered a fuel pump rebuilt kit P/N 811396 for a dual action fuel pump on a 1952 M38A1. This is apparently the early style and the diaphragm rod has a hole in it and is larger diameter than mine is. Mine also resembles a key with a notch in each side rather than a hole in the end. I believe this is called the vacuum side. I can’t seem to find the late style on your site to verify the late style is what I need. Any help would be appreciated. Thank you, Jeff Anderson 701-340-4104

Willys Jeep Parts Tech:
Sounds like you have the later style pump. Not the earlier one this kit is for. Please email mike@kaiserwillys.com to help.

Will this kit rebuild the combination pump 4963? Don’t know if it’s original on my 1961 CJ5

Willys Jeep Parts Tech:
Your CJ-5 wouldnt have this pump on it. See part number: 120206

Is the duel diaphragm because of vacuum wipers? could I get by with single diaphragm? Super hurricane engine.

Willys Jeep Parts Tech:
Please email mike@kaiserwillys.com more vehicle information and we can help out. Thanks!
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