Hello everybody,
this week I screwed something on Uschi again. Inspired by an inquiry in the German Goldwing forum on how to repair the fuel pump, I wanted to briefly document the replacement of the membrane. Since I had already renewed a few fuel pumps in the car sector, I expected to make rapid progress. Well, the friends from the land of the rising sun did not plan to repair the pump and prevent the membrane from being removed. But something like that excites even more and since I was horrified to find that the diaphragm of the pump is cracked and hardened, a solution had to be found. In 2008 an user described the project in an old threat here in ngw. So get to work and document the whole work.
The fuel pump is quickly expanded.
The five M5 screws are also loosened quickly and the interior with the two check valves is revealed.
Since the membrane was riveted with the plunger, I carefully sanded the riveted head. Always in mind that Honda will call the proud sum of 170 euros for a new pump if the worst comes to the worst.
continue to grind gently until the upper membrane disc comes off
Then I had to loosen the lower membrane disc with the screwdriver. Always make sure that the pane is not bent. Otherwise it can happen that the pump does not become tight.
a spring and seal emerged below the plate. The seal ensures that gasoline does not get into the oil circuit if the membrane leaks.
here I have laid out all the parts in order on a board. I was afraid that I would no longer be able to put the pump together.
Since I can no longer rivet the pushrod, another solution has to be found. So I decided to close the whole thing with a small screw. The diameter of the push rod is 4.5mm and so an M3 screw should serve. This was still in my possession somewhere. I just had to find the little box with the screw.
Since the push rod was not stuck in the pump, I had to fix it to drill the 2.5mm hole. So I made a precise holding template.
Since the push rod also rotated after drilling, I found help in a pair of crimping pliers, which I recently bought from a cheap hardware store.
I mastered the hole without the drill piercing the push rod and remaining intact. Then replace the drill with an M3 tap and cut a thread into the rod.
Since I could not find a repair kit or a suitable membrane in the vastness of the Internet, I had to rethink. I finally found a gasket for the gasoline pumps of a Russian car called Wolga.
the material has the same thickness as the original membrane and is also fabric reinforced.
Using the old membrane, I then recorded the new membrane on the sealing material and punched the 5 mm holes for the screws with the punch pliers. Cut out the membrane with scissors.
The whole thing is now secured with the small M3 screw from the box after I dripped a drop of Loctite into the threaded hole.
After I reassembled the pump, I was able to check whether the pump was working again. Without further ado put the nozzle for the gasoline inlet into my mouth and actuated the pump several times. A vacuum immediately built up.
I am confident that the pump will pump petrol again.
And to support the pump, an electric pump is installed, but it only runs when the oil pressure light is on. I.e. when the engine is not running and the carburetors are already filled properly.
And then I worked on the next step ... the crankcase ventilation has to go somewhere. I recently found a nice accessory in a travel souvenir shop on the North Sea. Without further ado I decided that this would be the new container for the crankcase ventilation.
Here is a picture of the accessory:
in english:
I am a woman and what are your super powers
I'm curious to see how it goes with the Uschi ... well, somehow she should be out on the street
Greetings
Harald
