Coleman Peak 1 550B no pressure

Hello everybody! (first post )
Some forum search didn't really help, so I'm turning to you experts.
I have just cleaned my Peak 1 as there was loads of gunky stuff after 10+ years of not being used.
I have cleaned everything and put the thing back together to the best of my knowledge. It's not building up pressure. What is the most likely cause for this:
The rubber pump cup appears to be rather "straight", meaning that the edges probably don't touch the walls of the pump housing.
On a diagram found elsewhere in this forum I saw there's a valve underneath the pump.

Which is the most likely cause for the behaviour mentioned?

Thanks for your help, Robert

 

first thing that comes to mind, is to get a pump rebuild kit, and then check the fuel filler cap, and then the valve bodies. if you pump it up, can you hear any hissing from the leaking air?

 

No, there's no hiss as there's no buildup of pressure. The pump moves with very little effort, I seem so recall that I needed more power to pump when the stove was operational.

Robert

 

Check the pump cup. Some are plastic, and have to be replaced. Others are leather and may just need a good soaking in olive oil or mineral oil.
You are doing the standard 'turn the pump handle to the left before pumping' aren't you ??
If you can get a little pressure, dunk the stove in water, see if any bubbles come out...

 

Ditto the pump cup. probably just needs oil. Sometimes they need spread a bit before re-inserting.

 

Hi,
some news. I have bought a replacement pump cup and generator, oiled the pump (yes, I'm using the twist-then-pump-then-lock movement).
I can build up some pressure now and get tiny blue flames. sometimes.
I think the problem has shifted to the regulator valve now. Is there a good way to clean it? What can I soak it in?

Robert

 

Hello, Robert,

What fuel were you burning in your Coleman before you put it away, long ago? One problem may well be hardened unleaded gasoline deposits, or the same, to a lesser extent, from kerosene. You may have to replace the generator assembly. These can be had from Coleman, and that is an easy fix. Good luck, and God Bless!

Every Good Wish,
Doc

 

Try Break Free, it's a gun bore solvent and is suposed to really do the trick. Wallmart has it in the sporting goods section.

 

I find that a capfull of carb cleaner in the tank will loosen up the crud.
add it to a full tank...