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  1. #1
    drive-by poster fetad's Avatar
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    Servicing a Topeak Road Morph G pump?

    I rode home this evening in the rain. While cleaning my bike I realized that the pump was filled with water. Lots of water. The tube was damn near filled. It shot full streams as I pumped it out. It's been drying for about 6 hours, but there is sand/grit residue left in the tube and I'm sure the grease is compromised. Is there any way to service this thing?

    What I have handy...

    Plenty of general tools
    WD-40
    Naphtha
    bearing grease
    Isopropyl alcohol
    Numerous chain lubes
    plastic pipettes



    accuweather sucks
    91' Bridgestone RB-T

    "You want it to be one way...but it's the other way" Marlo

  2. #2
    wannabe
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    try reading in here
    http://www.todson.com/

  3. #3
    747 Freight Pilot bicycleflyer's Avatar
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    Can be serviced easy. Take it apart and wipe all the grit out. Allow it to dry out. Grease the moving parts, particularly the O-ring and then reassemble. If you need any new parts, just call Topeak. Their service is first class.

    It sounds like you mount your pump on the underside of the downtube. Is that correct? If so you may wish to consider relocating it to another part of the bike to keep it out of the spray. Another solution would be a front fender. If you ride in a lot of wet weather, then you may want to consider a full set of fenders.
    Flying an airplane is really very simple...Push the stick forward, the house gets big. Pull the stick back, the house gets small. Keep holding the stick back, the house gets big again.

  4. #4
    Senior Member
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    Be sure the check valve is clean and dry too. I'm not sure what kindg the Road Morph has, some are ball checks and some are flappers but they must function properly.

  5. #5
    drive-by poster fetad's Avatar
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    Thanks for the responses. I asked the wrong question. How do you service a Topeak Road Morph G is more appropriate. I need instruction on how to access the main barrel. There is a spring set screw at the base that is removable, however this does not allow you to remove the "stick" from the barrel. The rest of pump is easily broken down. I've tried yanking on this thing in a few different orientations and unscrewing it (can't tell if it is even threaded on from the product diagram), but nothing is budging.

    I was caught in an unscheduled rain shower on my non commuter bike. As a preventive measure, simply mounting the pump with top pointing towards the BB rather than the head tube should suffice.
    91' Bridgestone RB-T

    "You want it to be one way...but it's the other way" Marlo

  6. #6
    747 Freight Pilot bicycleflyer's Avatar
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    I am having a hard time trying to envision in my mind what you are referring too. I have a road morph mounted to my folding/travel bike. Not sure about that G part. When I get home Saturday evening, I will get it out and look at it closely. I may even disassemble it to try and answer your question. It could probably stand some lube anyway.
    Flying an airplane is really very simple...Push the stick forward, the house gets big. Pull the stick back, the house gets small. Keep holding the stick back, the house gets big again.

  7. #7
    drive-by poster fetad's Avatar
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    Quote Originally Posted by bicycleflyer View Post
    I am having a hard time trying to envision in my mind what you are referring too. I have a road morph mounted to my folding/travel bike. Not sure about that G part. When I get home Saturday evening, I will get it out and look at it closely. I may even disassemble it to try and answer your question. It could probably stand some lube anyway.

    Here is a link to the product diagrams.

    http://www.todson.com/support/index.php?pid=filelibrary

    Scroll down to Road Morph w/ gauge (TRP-2G). The G stands for gauge. I'm trying to remove part # TRH-RP01. In engine terms, I need to remove the piston from the cylinder. From the digram it appears removable, but it could very well be epoxied in place.

    Thanks for taking the time to check it out.
    91' Bridgestone RB-T

    "You want it to be one way...but it's the other way" Marlo

  8. #8
    747 Freight Pilot bicycleflyer's Avatar
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    OK, I have that exact pump and the diagram cleared things up very nicely. Just like the diagram illustrates, I was able to remove the plunger by unscrewing the cap (counterclockwise) where the plunger shaft goes goes into the pump. The cap is in two pieces, the hook part and the threaded cap. The hook has no threads and is secured by screwing the threaded part in, so twisting it will bear no results. You need to turn the cap, which is only about 3/16 of an inch thick when secured. Maybe some pliers will help. But be careful not to damage the soft material when doing so.
    Flying an airplane is really very simple...Push the stick forward, the house gets big. Pull the stick back, the house gets small. Keep holding the stick back, the house gets big again.

  9. #9
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    I have a Mini Morph and discovered one day that there was tons of grit in it. I unscrewed the top as bicycleflyer describes and cleaned the junk out of the barrel and off of the plunger. Then I lubed it with the mineral oil that I use on my wooden cutting boards, because it was the closest thing to hand and it seemed like it would work.

    I would imagine lots of different things would work for the grease/lube aspect, as long as they're not something that will attack the rubber o-ring.

    As for making it not happen again, I realized that with it on the bottom of my downtube with the handle pointing up dirt was getting thrown right into it. So I rubber banded a plastic bag over the top (I call it a pump condom). All has been well since.

  10. #10
    drive-by poster fetad's Avatar
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    Quote Originally Posted by skylla View Post
    I have a Mini Morph and discovered one day that there was tons of grit in it. I unscrewed the top as bicycleflyer describes and cleaned the junk out of the barrel and off of the plunger. Then I lubed it with the mineral oil that I use on my wooden cutting boards, because it was the closest thing to hand and it seemed like it would work.

    I would imagine lots of different things would work for the grease/lube aspect, as long as they're not something that will attack the rubber o-ring.

    As for making it not happen again, I realized that with it on the bottom of my downtube with the handle pointing up dirt was getting thrown right into it. So I rubber banded a plastic bag over the top (I call it a pump condom). All has been well since.

    I was thinking something along the same lines using cling wrap or a condom. They come in so many colors I'm sure I could find one to match the paint scheme. Today I rode with the pump upside down, but after 30 miles the handle vibrated into the unlock position dragged against the ground. Forget that idea.


    Quote Originally Posted by bicycleflyer View Post
    OK, I have that exact pump and the diagram cleared things up very nicely. Just like the diagram illustrates, I was able to remove the plunger by unscrewing the cap (counterclockwise) where the plunger shaft goes goes into the pump. The cap is in two pieces, the hook part and the threaded cap. The hook has no threads and is secured by screwing the threaded part in, so twisting it will bear no results. You need to turn the cap, which is only about 3/16 of an inch thick when secured. Maybe some pliers will help. But be careful not to damage the soft material when doing so.
    Worked like a charm. The cap is barely exposed on mine...about 1/16". Didn't seem conceivable to torque on that, but it came loose with little trouble. I cleaned out the cylinder, hose, and head assembly and greased the gaskets. Brand new pump again.
    91' Bridgestone RB-T

    "You want it to be one way...but it's the other way" Marlo

  11. #11
    747 Freight Pilot bicycleflyer's Avatar
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    Glad we could help
    Flying an airplane is really very simple...Push the stick forward, the house gets big. Pull the stick back, the house gets small. Keep holding the stick back, the house gets big again.

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