Author Topic: modding 440 oiler stihl oilers  (Read 695 times)

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Offline jmester

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modding 440 oiler stihl oilers
« on: September 26, 2014, 05:56:37 pm »
anyone try and make a high flow oil pump by modding the piston pump and or control bolt. The 1.1 high flow piston pump from a 460 does not fit the 440 pump housing.

 Think there needs to be more travel of the piston pump but not sure. Was also thinking to make the half moon end of the piston pump deeper. Any ideas? ???
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Offline mdavlee .

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Re: Ms 440
« Reply #1 on: September 26, 2014, 06:10:59 pm »
That will help. Also make the notch a little bigger where the oil actually flows.

Offline jmester

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Re: Ms 440
« Reply #2 on: September 26, 2014, 08:41:33 pm »
What do you mean by the notch? Will have to look at the high flow 460 control bolt to see if it will fit and if it gives me any more travel of the pump piston.
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Offline mdavlee .

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Re: Ms 440
« Reply #3 on: September 27, 2014, 10:46:20 am »
The notch down on the end away from the gear. That's where the oil actually comes through at.

Offline jmester

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Re: Ms 440
« Reply #4 on: September 27, 2014, 03:27:16 pm »
Ok that is what I was thinking as well. how much do you think would be safe around a couple of thousandths?
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Offline jmester

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Re: Ms 440
« Reply #5 on: October 15, 2014, 02:02:49 pm »
Found that the high flow 460 control bolt will give you some more pump piston travel. I took the 440 notch on the pump piston to .125 witch is a thousandths shallow of the 460  high flow. Will have to get it on the saw and let you know how it does.
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Offline aclarke

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Re: Ms 440
« Reply #6 on: October 15, 2014, 03:37:46 pm »
Good info!

Offline jmester

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Re: Ms 440
« Reply #7 on: October 15, 2014, 08:36:48 pm »
Thanks. The saw is a 440 hybrid and it does real well just the oil pump is a little weak. I hope this works out.
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Offline jmester

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Re: Ms 440
« Reply #8 on: October 16, 2014, 11:51:51 am »
Well it seems to sling a lot of oil. Will have to run it some more in some wood to see if it drains the oil tank before the gas runs out. I also have it on the max setting so there is some room to tone it back if it does. Pretty cheap way to make a high flow oil pump to me. 8 dollar control bolt and a little grinding.
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Offline brettl

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Re: Ms 440
« Reply #9 on: October 19, 2014, 04:37:52 pm »
What did you use to machine the .125? Is this something that requires special machining equipment?
Sthil Man. 011AV, 015, 020, 020, 024, 025, 026, 028 WB(2), 028AV, 028 Super, 029 Super(2), 039, 041, 192TC, 200T, 250, 260, 390, 440, 441

 

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