Read Gum dust and Stihl HD Filters

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are these new hd2 filter setup available in oz yet? im guessing id better start saving so i can afford to buy one, piggy bank got raped hard today paying for a genuine set of stihl rings, i only got em just in case i need em in an emergency but i think i will frame them and hang in the bar room

They are listed as standard kit in my owners manual for my 660 which I bought in january and I know a bloke who runs them on his 660s and 880s and got them out of stihl for free when they replaced one of his 880s that had blown up from the redgum getting through the standard filter.
 
Mmmm interesting which dealer was that ?.

It was off stihl australia themselves not the dealer cause the bloke got to the point of threatening them with legal action over the issues of killing saws because of the filtration not being good enough to stop the redgum fines.

Oh and if I am allowed to mention dealers I got mine off Hunter Macpherson, they had to order it in direct from stihl because I ordered it with a 36 inch bar, they wouldn't give me one off the shelf, cause they all had 25 inch bars, and it was easier for them to get it from stihl with the longer bar.
 
Another couple of gratuitous DolMak HD filter pic's :D

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I think dry Box is as bad as Red Gum, you just can't see it as easily.

I mentioned the 'felt' pre-cleaner (that Matt hates) to isuzurover and how it looks very similar to what Stihl use too.

The "felt" will be a low packing density polyester (or polypropylene). It is not a bad setup because you can really go to town washing the outer layer...

Which is handy to know.
 
Rick if I remember correctly Matt had said this felt did little and the main filter was sufficient?

He blocked the pre-cleaner with crap too quickly and slowed the saw right down.

The idea of it is to save the main paper element from too many chunks that you may not be able to dislodge easily with a light blow out.
I haven't had a problem yet, but I'm only a firewood hack.

The answer is probably a couple of pre-cleaners and swap when needed.
 
Might be some trees need cutting up around here if this wind keeps up it is blowing a Gale outside and with it being as wet as it is they will be blowing over everywhere. I will try to call a dealer tomorrow about the hd2 filters. let ya know what I find out.
 
He blocked the pre-cleaner with crap too quickly and slowed the saw right down.

The idea of it is to save the main paper element from too many chunks that you may not be able to dislodge easily with a light blow out.
I haven't had a problem yet, but I'm only a firewood hack.

The answer is probably a couple of pre-cleaners and swap when needed.

Yep so the main media being the problem, this felt won't stop the fines or any pre-filter. Unless there is a filter or some means to apply a more appropriate media, your buggered. Matt replacing the media on the 390XP was a success from memory. The 371/2 filters, even the Woodsman pro's filter the fines, but above these saws, not happening.
 
Andrew,
I can say with a fair bit of confidence that the HD2 filter will keep the Redgum dust at bay. Not a cracker has gotten through the same filter material on my 261 although in saying that Redgum doesn't go through some flocked Husky filters on their smaller saws but makes my 390XP flocked HD filters look stupid. The bigger saws "may" be able to pull certain particulates through the filter material that smaller saws can not - tough call.
Good old Redgum eh? It's like a chainsaw filter's arch nemesis...

Good pics too old son :cheers:

Matt, a bigger displacement saw is going to "pump" or "pull" alot more air than a smaller....given that they are going to be close to the same psi compression wise......this not only in volume but verlocity.

While filter media is a big part of it, the shape of the fitler, its frame work, its fitting to carb and air flow design in the air box area all play a part...so the 261 is a better filter but the saw is better by design also....

but in no way is improving media a backward step....

btw ive been told you can retro fit a 5105 filter on a 5100
 
Matt, a bigger displacement saw is going to "pump" or "pull" alot more air than a smaller....given that they are going to be close to the same psi compression wise......this not only in volume but verlocity.

As Al said, the 372 and smaller saws don't have a problem, yet the larger Huskies do ;)

[snip]

btw ive been told you can retro fit a 5105 filter on a 5100

Is it an improvement ?
 
Matt, a bigger displacement saw is going to "pump" or "pull" alot more air than a smaller....given that they are going to be close to the same psi compression wise......this not only in volume but verlocity.

While filter media is a big part of it, the shape of the fitler, its frame work, its fitting to carb and air flow design in the air box area all play a part...so the 261 is a better filter but the saw is better by design also....

but in no way is improving media a backward step....

btw ive been told you can retro fit a 5105 filter on a 5100

One would think so, but it would be fair to say that a 371/372 would have a similar size ratio and setup to a 385/90, or even a 395.

Increase the cubic capacity and efficiency of a 372 (throwing that ratio out of whack) and the filter performs no worse and still better against the 385/90.
 
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It was off stihl australia themselves not the dealer cause the bloke got to the point of threatening them with legal action over the issues of killing saws because of the filtration not being good enough to stop the redgum fines.

I know a bloke who runs them on his 660s and 880s and got them out of stihl for free when they replaced one of his 880s that had blown up from the redgum getting through the standard filter.

Are you sure it's not the Stihl Extreme Filter setup on this guy's 880? If we're thinking of the same guy they replaced his standard 880 filter with the Extreme filter setup - this was early on in the piece. Different to the HD2 and only released by Stihl in South Africa and Australia.
This is the same guy who swears that Stihl techs told him that they believe the 880's may be disintegrating due to excessive power output - at no time did he ever tell me his 880 blew up due to dust ingression.
Same guy that brags about Stihl saws being the only brand that can handle the Herculean work he does everyday yet he's blown one up. He also blew up a 395XP but that of course was Husky's fault...

Rick if I remember correctly Matt had said this felt did little and the main filter was sufficient?

Correct Al.

He blocked the pre-cleaner with crap too quickly and slowed the saw right down.

Yeah Rick. My 7900's started running funny which is when in dawned on me something was going on and the only common thing between both saws was the filter. The pre filter was also impossible to clean in the field, near impossible to clean at home even.

Matt replacing the media on the 390XP was a success from memory.

Indeed it was and still is :D

Matt, a bigger displacement saw is going to "pump" or "pull" alot more air than a smaller....given that they are going to be close to the same psi compression wise......this not only in volume but verlocity.

While filter media is a big part of it, the shape of the fitler, its frame work, its fitting to carb and air flow design in the air box area all play a part...so the 261 is a better filter but the saw is better by design also....

but in no way is improving media a backward step....

Yep. The saw size issue was brought up by BobL a while ago when these filter issues from our hardwood started to come to everybody's attention.
I agree that saw design plays a part but remember that any air injected saw is designed to keep particles with a larger mass away from the air intake. Air injection setups actually make finer dust particles worse. I know a few guys that run their Stihls without the filter cover on and claim their filters block up in 1/4 of the time - they didn't even know why.
This "air injection" mumbo is the main reason the Dolmar HD setups work so well in dry and dusty conditions - they pull air from the rear of the saw where it is the cleanest, not from air sucked in through the starter cover. The main reason though is quite simply a superior filter material.
 

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