Motorize classic pneumatic handpump

[Good old Lego builder]

Hi all. My son and I have been building with my old technic bricks. Now I was thinking: I do have a 12v motor. And some old pneumatic parts, of the first series around 1984 i guess. Is it possible to motorize the pump with the 12v motor. More specific: I fear the pump would be to 'stiff' to move with the spring. Any ideas? 

(I thought I had once seen in in a Technic ideabook from those years, but could not find that.) 

Edited April 4, 2017 by Good old Lego builder

[Aventador2004]

what battery would you use for a 12 volt? a train controller. i own one 9v and it has a lot of power 

 

[VKTechnic]

To counteract the force of the spring, you could horizontally oppose two pumps (saw someone do this before). Otherwise removing the spring is a always an option.... 

[Good old Lego builder]

Aventador, indeed I use the 12v train controller.

 

[Milan]

There are people on YT using XL motors to power Large Pneumatic Pump(s). So just for the show, here are two videos of that:

And:

https://www.youtube.com/watch?v=hEz8JNT0ugU

This is one XL powering one Large pneumatic pump:

https://www.youtube.com/watch?v=kKxkjBwsTec

I guess with proper gearing, you can make this also with 12V motor and 1 pump.

[MikeTwo9398]

3 hours ago, Good old Lego builder said:

Hi all. My son and I have been building with my old technic bricks. Now I was thinking: I do have a 12v motor. And some old pneumatic parts, of the first series around 1984 i guess. Is it possible to motorize the pump with the 12v motor. More specific: I fear the pump would be to 'stiff' to move with the spring. Any ideas? 

(I thought I had once seen in in a Technic ideabook from those years, but could not find that.) 

@Good old Lego builder I know where you might have seen how the motor was build in. It is in the building instructions of the Excavator 8851. Unfortunately on all the sites where you can find the building instructions (I tried 3 via Brickset.com), the instruction on how to build in the motor is not shown. In my book it starts just behind the instructions of the B-model starting at page 26 until 30.

I do not know if the motor is strong enough.

In case you don't have the book of 8851 here are the instructions:

8851_page_26 by mike verstappen, on Flickr

8851_page_27 by mike verstappen, on Flickr

8851_page_28 by mike verstappen, on Flickr

8851_page_29 by mike verstappen, on Flickr

[Aventador2004]

5 hours ago, Good old Lego builder said:

Aventador, indeed I use the 12v train controller.

 

wasn't sure if there was a 12v batt box or not.

the XL is also useful as milan stated.

[Good old Lego builder]

Thanks all!! We will give it a try with those instructions.