Stihl 044 Oiler Mod

[huskihl]

Several people have asked about modifying oil pumps for more flow so they can run a longer bar. @dolmarkid sent me 2 oilers for a Stihl 044 and I thought I'd take a few pics along the way to help show others how I do it. This mod will allow an 1128 series to run a 32-36" bar and oil it sufficiently. I'm sure it'll work for other models too.


As received



After a trip through the parts washer



1st, I push the control bolt inward to remove any tension on the roll pin.



This is where the roll pin is located. I punch out the roll pin with an appropriately sized punch.



Or in this case, a perfectly sized drill bit. I set my vise jaws about 1/4" apart and center the pin in the gap. Then tap the pin out

 

[Dub11]

 

[huskihl]

Once the roll pin is tapped out, grab your flashlight and shine around on the floor and find it. I tap the pin about half way out while holding onto the punch, and then hold one hand underneath and tap it the rest of the way out.

Next, you need to remove the control bolt. I wiggle it back and forth while prying up with a screwdriver. There are rubber o rings that are holding it in there



Once the control bolt is removed, the oil pump shaft can be removed



Be careful when removing the shaft, as there are 2 washers with a spring between them. The inner washer almost always wants to stick inside the pump




Note the offset on the end of the bolt. This is what controls the movement of the pump shaft, along with the ramp on the shaft, back and forth



Here are the 2 pieces as they are oriented inside the housing. When you adjust the control bolt, you are controlling how much the pump shaft can move back and forth due to which part of the concentric end of the bolt is touching the shaft.

 

[huskihl]

In order for the pump to flow more oil, I like to give the piston more stroke. To do this, find the lowest part of the ramp



and measure how far it is from the end



I've found .015-.020" more ramp to be sufficient. I do this with a cut-off wheel and a diamond burr to polish it



You'll also need to remove that same .015" from the corresponding area of the end of the control bolt where it's in the "max oil" position

 

[beaglebriar]

Fool....shouln't you outta be sleepin' n stuff?

 

[huskihl]

On the opposite end of the pump shaft, you'll notice a cupped area. This is what grabs the oil and allows it to be pumped out. I like to make this area a little bit larger. So measure where the edge is



And cut it a little bit bigger



I also do this with a Dremel cut-off wheel. Make sure there aren't any rough edges on the shaft that could score up the inside of the pump


Now it's time to reinstall the shaft with the washers and spring. I hold tension on it against the spring so I can install the control bolt



Install the control bolt by twisting it back and forth. I spray some oil on the bolt to aid with assembly.

Next, tap the pin back in



And you're done

 

[huskihl]

Fool....shouln't you outta be sleepin' n stuff?

Soon.

 

[Dub11]

Fool....shouln't you outta be sleepin' n stuff?

Move along nothing to see here husky man.

 

[beaglebriar]

Move along nothing to see here husky man.

Lol.. I work on a lot of ms290's that could benefit from this.

 

[Cracker Boy]

On the opposite end of the pump shaft, you'll notice a cupped area. This is what grabs the oil and allows it to be pumped out. I like to make this area a little bit larger. So measure where the edge is

View attachment 94404

And cut it a little bit bigger

View attachment 94405

I also do this with a Dremel cut-off wheel. Make sure there aren't any rough edges on the shaft that could score up the inside of the pump


Now it's time to reinstall the shaft with the washers and spring. I hold tension on it against the spring so I can install the control bolt

View attachment 94406

Install the control bolt by twisting it back and forth. I spray some oil on the bolt to aid with assembly.

Next, tap the pin back in

View attachment 94407

And you're done

View attachment 94408

Great thread kevin but im still gonna let you do it when im on my feet thanx for sharing

 

[huskihl]

***NOTE***
After doing this to my 066, it will now occasionally run the bar oil tank dry before it runs out of gas. This can be rectified by either not turning the screw all the way to max, or by not filling the gas tank completely full

 

[Cracker Boy]

You read my mind was bout to ask that question .can you do 036 and 064 as well?.i meant to ask you that the other day.

 

[huskihl]

You read my mind was bout to ask that question .can you do 036 and 064 as well?.i meant to ask you that the other day.

064, yes. And i would believe so on an 036, though I've never done one

 

[Cracker Boy]

064, yes. And i would believe so on an 036, though I've never done one

I may have to be your guinni pig.im sure you could.i do know 036 064 take the same oil line kit with the hose behind the clutch thats a pain in the azz.

 

[Dub11]

Is something like this possible on a fix oiler say of a 026?

 

[drf256]

Great job Kevin.

I’m wondering on an o36 as well. We can make em strong enough to pull a 28, but oiling it is another problem.

 

[mdavlee]

Any stihl oiler will be the same from what I've seen. I don't even touch the control bolt. Just the piston. Seems to not drain before the fuel. Factory HO is only .2mm longer stroke so .008" is all

 

[T.Roller]

Great thread Kevin. I've been meaning to do this to my hybrid for awhile now. The oilers on these saws are pitiful.

 

[Onan18]

Great thread Kevin. I've been meaning to do this to my hybrid for awhile now. The oilers on these saws are pitiful.

HOORAY 288 & 395!

 

[drf256]

Can an 046 oiler be modded to fit an 044?

Something inherently not sexy about oilers. Kinda like brakes on a hot rod, we do all we can to get more go when the STOP is what matters more.