Topeak Joe Blow HP track pump problem

[Lanzecki]

I think I've killed my Topeak Joe Blow HP track pump

I didn't loosen the lock nut it appears and the pump went over pressure, something went pop.

When blocking head and pumping I can feel a little pressure and there is a hissing noise of escaping air. My guess is I've blown the one way valve that allow's air in to the pump.

Does anyone have any idea of how to open these pumps? I cannot find any fastenings.

 

[biggs682]

no idea but try google or you tube

 

[Lanzecki]

Yea, I did. And the only thing I found was someone with the same problem..

But......... I took the bull my the horns and managed to workout how to strip and fit it. Picutres to follow once it cool's down here a bit.

 

[MossCommuter]

I emailed the UK agent (got the address on Topeak's website) and they sent a replacement by return. Gratis.

Exemplary service.

 

[Lanzecki]

Here's how to fix it. I took these pictures while putting it back together, so they'll be a little strange or out of order. This is How to fix my problem.

Step one : Realise you've broken ya pump and swear in various languages.

Step two: Spend 3 days looking at it and thinking.

Step Three: Take the bull by the horns.

Step 4: Here we go, Remove the top of the pump, and the actual bit that moves. There are two pin holes oposite each other under where the hose clips are. Inserting a paper clip in each hole while rotating the whole plastic thing (90 degrees) will release the top of the pump and allot the hand pump to be removed. I did this, but I'm not sure it's 100% required. Here is a picture of that cap turned upside down after being removed. You can see the 2 plastic things inside that the paperclips pushed to remove. There are 2 cosponsoring holes in the pump tube.

Step 5: connect a large allen key (8mm) to the allen key sized hole in the back of the pump (opposite where the pump hose exits) This was hand tight. It's all plastics so I wouldn't tighten it any more then hand tight. Sorry I have no picture, but see later as the part the allen key engages with is removed from the pump body.

This removes the hose. !!! WARNING. There are two parts that can fall out. a plastic ball and a plastic T-shaped rod. Loose them, and bin the pump.

Step 6: Leaving the allen key in use it to remove the rod that passes all the way thru the pump and connects to the hose.

step 7: Slide the pressure gauge up and off of the pump it's self (See we did need to remove the top of the pump)

step 8: remove the grey plastic collar from the gauge housing. This fits around the pump body. It has two little clips in the bottom.

Step wassit: with the gauge in the same position. There are two plastic clips holding the light grey top to the dark grey. Insert a pry (screwdriver) between the plastic and prise apart using your favoured method. Once they are free the light grey lifts up and was helped free with a little rotation.

step thinggy: The picture and finger show it fixed. The black plastic nut was 'undone' from it's bolt. Air was leaking from this point. Tightening (hand) was more then enough.

Assembly is the opposite of before. The ball goes in before the Tbar... Hand tight guys, this is plastic..

Enjoy.

 

[Arjimlad]

Thank you for taking the trouble to do this. I have to service my pump and this guide is really helpful.