Will this fix my tank not being able pressurize?

I had the same no pressure building issue after three decades in storage. But before I started buying parts that I might not need, I removed the pump and check valve. The check valve needed a little cleaning at the bottom to release the check ball. A little brake cleaner will clean that up, shake it and you should hear it clicking away. The leather cup may be salvageable if you soak it in kneets foot oil overnight. The following day I reinstalled and it did build pressure but I replaced it anyway. That check valve is not easy to remove, wrap a rag around the tank and place it in a vise firmly; use the largest and thickest tip flat head screw driver you have and put muscle into it to remove. I actually used a vise grip plier on the shaft to gain more leverage to twist counter clockwise to remove it. Otherwise Coleman has a special check valve removal tool online I think $40. No need to buy an entire new pump, and I have had the same check valve since the early 90's. There are many videos on youtube to help you with maintenance on the Coleman stoves. Happy camping.

Ok, so it states right on the package in the listing that this "fits all models of coleman lanterns and stoves that have a fuel tank". why ask again??

It will fit any Coleman latern or stove it is easy to install

Feel silly asking but i've got a 1965 coleman 425d 3 burner suitcase stove. not getting anymore pump to the tank. i'm guessing it's this. will it fit?

This is for the 426D 3 burner and the 425E and 413G 2 burner. These are 1976 vintage stoves. Found user manual pdf online. Actually found your 425D manual online and this also works on the 425D so 100% exact fit

Colour	Multi-coloured
Brand	Coleman
Material	Plastic
Power Source	Manual
Operation Mode	Manual
Manufacturer	Coleman
UPC	076501107364
Department	Unisex
Item model number	3000005094
ASIN	B002QFJUSK

Coleman Coleman, Pump Cup

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