Pagoda SL Group
W113 Pagoda SL Group => Drive train, fuel, suspension, steering & brakes => Topic started by: merrill on October 04, 2022, 12:27:33
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well looks like the fuel pump on my 230 sl is leaking at the wire connections, all hose clamps are snug.
after reading several posts and searching the tech section the leak is not uncommon.
now to come up with a plan on how to repair or replace with a rebuilt.
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talked to vintage euro and ordered the rebuild kit from them for $65 bucks
https://vintageeuroparts.com/short-style-fuel-pump-repair-rebuild-kit-280-se-sl-bosch-mercedes-w108-w111-w113.html
they also have a video showing the rebuild
https://youtu.be/PkC8WQd3_H4
another project to add to the list!
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You might want to try Loctite 290 green wicking sealant.
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I used the same kit to rebuild mine. They also have a more complete kit with a new impeller and armature if yours are too far gone.
make sure your mating surfaces on your bottom plate are flat so it seals well. you can wet sand it using fine wet and dry paper to get it totally flat.
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hi
thanks for the replies and advice,
pulled the pump yesterday, now waiting on the kit.
for sure its leaking from either the terminals or the top cover o ring. the pump is dry above the top cover o ring area.
Question, is there a consensus on lubricating the o rings, after using the search function and reading about 8 posts on rebuilding the pumps it seem that a little motor oil is the recommendation?
thanks in advance
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talked to vintage euro and ordered the rebuild kit from them for $65 bucks
You are not a patient man. Less than 3 hours between "I need a plan" and "I bought a rebuild kit". :)
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Rodd
lol, that's the benefit of this group, by the it didn't take long for me to research the issue and read posts on how to repair and make a decision. :)
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Question, is there a consensus on lubricating the o rings, after using the search function and reading about 8 posts on rebuilding the pumps it seem that a little motor oil is the recommendation?...
Yes, definitely put a light coat of motor oil on the seals. Kent Bergsma (MercedesSource.com) has a great video about replacing seals in a short pump: https://www.youtube.com/watch?v=a3l0vI7UwGA. Fast forward to time 9:30 in the video.
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thanks Charles 230sl!
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be careful with the screws when you open it up let the soak in some penetrant oil
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... a great video about replacing seals in a short pump: https://www.youtube.com/watch?v=a3l0vI7UwGA. Fast forward to time 9:30 in the video.
Charles,
When you share a link, you can do that fast forward yourself by adding a time suffix to the link, "&t=9m30s" in this case. So, it would be:
https://www.youtube.com/watch?v=a3l0vI7UwGA&t=9m30s
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thanks Rodd, I didn't know that. I'll add a time suffix next time.
Good info,, thanks again.
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received the kit from vintage euro today, so decided to get started on dis assembly of the pump
the impeller and cover are clean!
brushes are worn (picture)
need to pull the armature from the top and clean the inside of the top.
outer o rings appear shrunken and dry. wont mess with those until re assembly
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looks like its in pretty good shape. should work well. how is the commutator?
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Pinder,
actually looks good, sorry that the picture is kind of dark
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looks very good. The new brushes should work well
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brushes are worn (picture)
I don't know much about electric motors. Where are the brushes in the picture, and how does one know if they're worn?
I'll probably be doing this rebuild in the spring.
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picture of the brushes up in the 13th post in this thread? they are in the base.
the old ones got some wear, good think new ones come in the kit!
these videos and the one above are helpful
How to rebuild a Bosch Short Fuel Pump MERCEDES W108 W111 W113 0442201002 A 0010915201
https://m.youtube.com/watch?v=PkC8WQd3_H4&feature=youtu.be
Rebuilding An Old Mercedes “Short” Fuel Pump
https://m.youtube.com/watch?v=TFcO3I3GQBg
1963 to 1972 Mercedes FID Short Electric Fuel Pump Repair Options
https://m.youtube.com/watch?v=yI7T3WVpfk8&feature=youtu.be
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The brushes are designed to wear down like break pads. I think when they have almost worn down to about 3mm it would be best to change. If the pump is opened up and new ones come in the kit its wise to change them out.
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12th post, the filename of the pic literally says "brushes", but I see nothing with bristles. Just some springs, clips, and blocks with a curved end. I'll watch the videos and try to learn something.
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OK, so "brushes" aren't actually brushes, they're blocks. Does that come from some terrible naming by someone 150 years ago? Were they actually metal bristles 150 years ago and the name didn't change with newer technology?
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That's correct, the original brushes were copper bristles, which over time developed into carbon or carbon compounds. When they wear down, or the springs weaken, or they get stuck in their runners, this can cause arcing and burn the commutator, so best to replace while you have the pump apart, and make sure they are free in the runners. Check the commutator for any burns or flat spots before reassembly
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hello
some pictures for clarity
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well, pump re seal is complete and good timing as the brushes were very worn (picture)
some tips
1, the brushes are removed by pushing them toward the center, if you try to push outward they cant clear the holder (picture)
2. be sure to lube everything when re installing, o rings, where the o rings sit and the contact surfaces where other parts mate.
the fit with new o rings is very tight.
3, when re installing the brush springs, i found that it was easier to spread the 2 legs apart and using a needle nose pliers to grab the entire spring between the legs would hold the legs open. then carefully inserting the spring where it sits on the holder, the long part is far enough over to engage the brush and then sort of push the whole thing down. then you an use various tools to grab the short leg and pull it over to where it locks in the holder.
4. removing the terminals was not that bad as they are 2 parts, so its easy once unsoldered and unscrewed to remove one side at a time. you are able to spin and rotate as needed to get the wires out so you can r/r the o rings.
lastly i would watch the vintage euro video, do a step, watch the next step, do that step and so on. its actually straight forward.
hope this helps !
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pump installed, no leaks!
took the car for a drive today, nice to be back on the road
I may buy an extra kit to have it in the future.
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Nice job!
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"I love it when a plan comes together!"
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took the car for a nice freeway drive yesterday, it seemed to have faster acceleration.
not sure if this is related to rebuilding the pump but sure was nice!