death by dust ?

[MCW]

Maybe inadequate air filtering in chainsaws is a ploy to insure the sale of more saws?

Well if you go back a number of years before the HD2 came along Stihl had a filter setup called the "Extreme Conditions" filter kit. It was this massive big oiled foam setup that you couldn't even fit under the filter cover. Stihl Australia had a number of warranty claims on MS880's (seizing up from dust!) and were fitting these kits for free to customer's 880's under warranty. 880's seemed to have the most issues simply because these were the models getting hammered the hardest under marginal conditions.
The kit was only available in Australia and South Africa.
Don't let anybody tell you that wood dust doesn't cause any issues and gets burnt off through the engine. I've heard that numerous times on this site before. Small amounts are fine but wherever there is wood dust there is real dust too.

 

[lmbrman]

Yea, when I think of the dust rolling as a machine goes thru the woods it can be nasty. Picture dragging a bunch of trees with a skidder up to a guy waiting to buck them, or the truck rolling in to load, it about chokes a guy in dry weather. I work by myself, so the saw and machine never run at the same time, not an issue. Maybe I can find out more about the saw's history at some point but I have seen similar on the other 562 I worked on.

I am going to use oil on my 562 and see what it tells me about the flocking, but with snow cover and little dust conditions here my saw is not much of an issue, not like the one pictured for certain. I usually blow off my air filter weekly. I recently acquired a 272xpg that had never been blown off and the air filter wasn't as bad as the 562 pictured, though the carb area was packed with dust.

 

[Zero_sum]

I'd be curious to hear what kind of hours that saw has as well seeing as it is logged "in" the saw.

 

[c5rulz]

Dave is right on noting this is a serious concern. My first 562 had this problem and I dug a bunch of debris out of the intake elbow before trading. On my new 562 XPG I have swabbed grease between the filter and the elbow to minimize the dust.

 

[heimannm]

I recently torn down a McCulloch PM800 that I suspected had been run lean or with an air leak.

What I found was in fact extreme wear on the piston (cylinder was still in great condition) in the area of the transfers. My impression was the saw was run without an air filter and the stuff getting through went straight through the crankcase to the piston.





Mark

 

[lmbrman]

Dave is right on noting this is a serious concern. My first 562 had this problem and I dug a bunch of debris out of the intake elbow before trading. On my new 562 XPG I have swabbed grease between the filter and the elbow to minimize the dust.

I never would have checked my filter at low hours except for your little swab test results, and my intake had crud also. Never seen so much crap in there on my old saws. Filter media or gap it is an issue.

 

[lmbrman]

I recently torn down a McCulloch PM800 that I suspected had been run lean or with an air leak.

What I found was in fact extreme wear on the piston (cylinder was still in great condition) in the area of the transfers. My impression was the saw was run without an air filter and the stuff getting through went straight through the crankcase to the piston.


Mark

Interesting. Being a part time 'ace mechanic' I have not seen much. I assume the bottom end was bad as well? I am headed out to check the sides of that 562 piston now

-dave

 

[MCW]

I recall JacobJ a few years ago stating that he'd bought a few old collectable saws from Australia that had so much Redgum dust packed in the crankcase he was surprised they still ran
I posted photos a while ago comparing my 241C and my 550XP's intakes. The little 241 had 10 times more hours on it compared to the 550 and zero dust had gone past the filter (welcome to HD2's ). The 550's intake was absolutely packed. Filter oil alone fixed this problem but filter oil does make filters block up a LOT faster. Poor filtration is a big concern for a brand new saw, and the pictures posted here of the 562 intakes doesn't come as a surprise to me.

 

[CR888]

l think the sooner all saw manufactorers go to a round auto style filter like the ms/241/261/362 ect the better. The stihl hd2 round filters are the best stock filters l have used. l have had issues with all brands. The problem is as MCW mentioned is that probably 80+% of the worlds cutting conditions don't need such perfect filters. Sawtroll feels this is a non issue (usually blames blunt chains) where he is from you could get away with almost no filter. But here is so dry and dusty that it only takes a few cuts to notice a poor filter setup. Don't forget a saw will breathe more air at WOT in five minutes than a human does in a year.

 

[Mastermind]

If it says Husqvarna on it Sawtroll is cool with it........even if it bogs and eats piles of dust.

 

[heimannm]

Actually the bottom end was pretty clean. The 10 Series use a needle bearing on the PTO end, and a ball bearing on the flywheel end. The ball bearing had a bit of dust in it but cleaned up quite nicely and spins very freely now. The needle bearing was just fine.

I will replace both seals when I put this one back together but most likely will reuse the bearings. The ball bearing in particular is a bit peculiar and has no standard off the shelf replacement.

Mark

 

[hamish]

WWHD?

Well would begin by checking the build date of the saw to see if it has the updated air filter holder, those built after week 47, 2012 will have the updated part.
Individual cutting conditions should dictate ones maintenance level. Apart from the HD filter setup I have yet to see a filter that's god at keeping out the fines.

 

[Andyshine77]

I use a light mixture of detergent, like Simple Green to clean my oiled filters.

Average rainfall in Cincinnati is 42.24 inches, dust isn't a problem, it has more to do with the species of wood. The paper element filters should be the standard, with flocked and nylon screen as a wet/cold weather option.

 

[MCW]

If it says Husqvarna on it Sawtroll is cool with it........even if it bogs and eats piles of dust.

Apparently saws don't need falling spikes fitted either

 

[MCW]

Here's the intake on both my 550XP after only a couple of tanks and my 241C after lets say.... infinity! (basically no matter how long you run it in any conditions nothing will get past the filter). Any fines on the little Stihl's intake fell off the filter when I removed it.
Around 50% of the dust in the 550's intake is actually real dust. The wood I was cutting at the time was green Casuarina which has white/pale wood dust. This stuff was dark brown/red which is the colour of the tracks where machinery was running up and down all day. I was blowing out brown boogers for days too Filter oil was an instant fix but then you have issues cleaning filters in the field without running petrol over them or accessing an air compressor. I did actually end up running a small compressor off a generator on the back of my ute/truck/pickup when milling with the 3120 to clean filters but hadn't done that on this property.

 

[LegDeLimber]

Well for what it's worth, I thought the WWHD was referring to H-Husqvarna
can't seem to deem fit to send a freaking set of breakout cords and software
to their dealers , so as they can analyze the boggy carb matter.

I truly baffles me that Husky hasen't sent a memo to their dealers sating that if you wish to continueto be an authorized dealer, you will obtain basic, functional, computer
(used ones aren't that bad expensive) and learn to use this software.
Lest they rescind your official dealer status and absolutely refuse to supply you any auto-tuna-trnomatic
inventory for sale.
With all following Non-computer controlled equipment shipped on a order by order, case review.

AS much disdain as I hold for the electronics in a saw carb and think of swapping carbs instead of repairing them , puts a fellow dead into the "parts changer" group instead of being what we "old school" folks regard as being a skilled mechanic.
The things are here now and won't be going away.
But !!!
I think if husqvarna's going to ship them
it's way past time to get their heads outta their rectal regions and establish some damned procedures for coping with the equipment, they're shipping.

Frankly, It's little wonder that guys are continually beating their heads against these saws/carbs
when Husqvarna doesn't even appear to think it merits shipping a simple pair of wires to the dealers and saying to download the software through their account.

 

[Pud]

i though dust came through where the filter mounted at the carb , tried to grease it did nothing all the dust was coming through where the two pices of the filter join together thats why the dust builds up on the inside of the filter just above where it mounts , MCW have u ever tried the foam filters from husky on the 3120 ?

 

[MCW]

i though dust came through where the filter mounted at the carb , tried to grease it did nothing all the dust was coming through where the two pices of the filter join together thats why the dust builds up on the inside of the filter just above where it mounts , MCW have u ever tried the foam filters from husky on the 3120 ?

No I haven't tried the foam filters mate. I just oil the standard flocked filters now. I run a few of them and when milling Redgum I need the lot. Lucky to get an hour out of a filter before it needs changing.
You mention that the dust is coming through the filter join - have you ever simply sprayed filter oil on it? This will tell you whether it's coming through the filter media or through the gap. If the filter oil doesn't fix it then it's finding some other way in.
Filter oil alone fixed my pre HD2 Stihl filters, my Dolmar 5100-S and 7900 (standard) filters, my Husky 345, 353, 550XP, 365 BB x 3, 390XP x 2, and my 3120 x 2. I have never had to grease the bases or seal up filter joins.
At least you're an Aussie who understands dust

 

[KG441c]

If Huskies r having these filtration problems why has it been hyped up on AS so much about how far superior the Husky filtration is??

 

[MCW]

If Huskies r having these filtration problems why has it been hyped up on AS so much about how far superior the Husky filtration is??

Because the vast majority of Husky users don't cut under dusty conditions. I've cut in high rainfall forests and Husky filtration is excellent there. Softwoods also don't tend to produce much dust.
Air injection works by using particle/chip weight and inertia. If the particle has low mass, as in fine dust, it doesn't get ejected from the intake air flow.
I've been very critical of Husqvarna filters for years. Stihl and Dolmar fixed it and acknowledged there has been problems, Husqvarna haven't seemed to care.