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#Post#: 40437--------------------------------------------------
This Ertl will actually pump
By: MadeForThat Date: April 16, 2021, 1:35 pm
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So I have been getting into a modification of an ertl water
pump, and decided that I really wanted it to pump. The
modification to run on drive belt was quick and easy, but
modifying the internals will be far more complicated.
[attachimg=1][attachimg=2][attachimg=3][attachimg=4] I made a
3d model of the crazy part needed to transfer power to the
bottom, and printed it out in a few minutes on a 3d printer. (I
work as a tooling designer, so I just designed it on a lunch
break) It was a little sticky, but after "wearing it in" it
slides pretty smooth. I then drilled the spout out by hand, and
each of the oil cups. My plan is to run a 1/8" copper tube up
inside the pump up to the spigot, and my plastic part leaves
just a little bit of room for that. I have not designed the pump
mechanism at all, but I think I can make the pump from a spray
bottle work. it will just need to fit in the die cast base of
the toy. Anyone else tried to do this? id love to hear thoughts
for how to make the pump under the base.
#Post#: 40439--------------------------------------------------
Re: This Ertl will actually pump
By: St Paul Steam Date: April 16, 2021, 2:23 pm
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watching with intense interest , your on your way to something
really special.
#Post#: 40440--------------------------------------------------
Re: This Ertl will actually pump
By: txlabman Date: April 16, 2021, 3:36 pm
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Ooooh…..very interesting.
Looking forward to seeing more.
#Post#: 40448--------------------------------------------------
Re: This Ertl will actually pump
By: ShadetreeMotorcycle Date: April 16, 2021, 5:22 pm
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If you can make it pump with 3D printed parts...you could
probably sell them! There are several of us on here that have
Ertl pumps and they are good lookers, but more joy could be had
if they lifted water!
I was going to have a go at it but have not had time to even
take my pump apart.
#Post#: 40450--------------------------------------------------
Re: This Ertl will actually pump
By: Jim Date: April 16, 2021, 6:24 pm
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As the others have mentioned really interesting.
#Post#: 40465--------------------------------------------------
Re: This Ertl will actually pump
By: classixs Date: April 17, 2021, 2:58 am
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Seems like a relatively advanced set up your planning for here,
will be looking forward to see you progress.
#Post#: 40524--------------------------------------------------
Re: This Ertl will actually pump
By: MadeForThat Date: April 18, 2021, 6:07 pm
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Well I happened upon another pump at an estate sale, in the box!
They had 20 and I talked them down to 10 with some dvd's! I
modified one of Jin's hit and miss engines for my dad as a gift,
and I think this will be the follow up gift for this Christmas
:)
#Post#: 40527--------------------------------------------------
Re: This Ertl will actually pump
By: MadeForThat Date: April 18, 2021, 6:40 pm
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Well I happened upon another pump at an estate sale, in the box!
They had 20 and I talked them down to 10 with some dvd's! I
modified one of Jin's hit and miss engines for my dad as a gift,
and I think this will be the follow up gift for this Christmas
:)[attachimg=1]
I also found a pump! Got some inspiration from my dog chewing a
squeaker for a few hours. Not sure how long one will last before
wearing out,but the squeezers are easy to press and should
connect to some check valves pretty easily.
[attachimg=2]
#Post#: 40530--------------------------------------------------
Re: This Ertl will actually pump
By: ShadetreeMotorcycle Date: April 18, 2021, 7:29 pm
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That's a SWEET price for Ertl pump in a box!
I think the squeaker could last for some time if it is not
depressed with a sharp metal object, maybe something like a dart
gun suction cup or something soft on your vertical plunger as a
cushion?
The squeaker will likely make good water pressure on the down
stroke, I am unsure if it will have a lot of strength to draw in
the new water so a check valve with very easy open strength will
be needed. Are you going to make your own check valves?
Keep us posted if you make any progress.
I see the edge of a Tarot Stirling engine...nice choice! I
have one on order myself :)
#Post#: 40619--------------------------------------------------
Re: This Ertl will actually pump
By: MadeForThat Date: April 21, 2021, 10:19 am
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So yesterday over lunch I designed this little "pump" to fit in
the base of the ertl. The sqeeker bulb will have a tube to a Tee
on the far side of the base, where the check valves will be
connected. I am planning to use these check valves:
(HTM) https://www.amazon.com/gp/product/B08GLXZJCW/ref=ppx_yo_dt_b_asin_image_o02_s00?ie=UTF8&psc=1
Mainly because they are small, but can be disassembled if they
plug up. They are normally used for aquarium air lines to make
sure siphons don't happen. The base I designed should hold the
bulb, check valves, Tee and tubes and I will need to do a bit
more planning for how the water will enter the base of the pump.
I started the print when I went to bed last night, and woke up
to a complete part. Unfortunately the squeeker bulb is too
compressed when assembled, so I will need to either use a
different bulb, or plan to put this project on another base to
allow a little more room under it. Also, the bulb is centered
under the "pusher" and this leaves no room for a little copper
tube, so I will plan to move the bulb a bit to make room.
[attachimg=1]
[attachimg=2]
[attachimg=3]
[attachimg=4]
[attachimg=5]
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