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#Post#: 88443--------------------------------------------------
Chain keeps slackening
DIR By: ray.sandison
Date: September 28, 2021, 11:49 am
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My chain keeps slackening after one or two cuts even though the
tightening nut is very tight. Do I need to replace the bar?
#Post#: 88447--------------------------------------------------
Re: Chain keeps slackening
DIR By: pleasant
Date: September 29, 2021, 10:35 am
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Providing the thread on the adjuster is not damaged and the
locating pin of the adjuster is located correctly then in theory
providing the clutch cover nuts(s) are tightened up the chain
shouldn't slacken off at all. If you have inspected those items
and all are fine, then are you tightening the bar cover up with
the bar in it's 'upwise' position. Ie, as if you were putting
pressure on the bar whilst cutting? A lot of people tighten bar
covers without exerting upwards hand pressure to the tip beofre
tightening, this can allow the chain to loosen whilst cutting as
the bar can slip upwards against the bar 'stop' under the cover.
Let's assume all that is fine, then remove it all and firstly
inspect the bar- particularly the bar tip if it has a sprocket
nose- the needle bearings can fail and can cause the sprocket to
run off centre- in which case replace the bar. Next check the
clutch sprocket for wear- if oyou have significant high and low
wear on the sprocket gear teeth you will get irregular
adjustment- tight one rotation and loose the other. Next, the
clutch drum bearing- easy to remove and check- if in any doubt
just replace as they are cheap. Finally if all that seems ok,
then you are looking at crankshaft bearings and/or a bent
crankshaft. Start cheap and easy to check and work up to the
dear less obvious stuff.
#Post#: 88448--------------------------------------------------
Re: Chain keeps slackening
DIR By: Chainsawrepair
Date: September 30, 2021, 6:07 am
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I'm curious what saw brand and model and if it has one of those
tool less chain tenisoner cover set ups.
Only saws I see with that issue local been those.
I install regular covers and tensioner set ups on them and no
more issues.
#Post#: 88638--------------------------------------------------
Re: Chain keeps slackening
DIR By: jimc295
Date: November 2, 2021, 4:41 pm
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--- Quote from: Cut4fun . link ---
>
> I'm curious what saw brand and model and if it has one of
those tool less chain tenisoner cover set ups.
>
> Only saws I see with that issue local been those.
>
> I install regular covers and tensioner set ups on them and no
more issues.
>
--- End Quote ---
Cut4fun, do you have part#'s required for that conversion? I
have a 450e and that is my problem, ill sometimes have to
tighten my chain every few cuts.
#Post#: 88641--------------------------------------------------
Re: Chain keeps slackening
DIR By: Chainsawrepair
Date: November 3, 2021, 6:06 am
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--- Quote from: jimc295 link ---
>
> [quote author=Cut4fun . link=topic=7735.msg88448#msg88448
date=1633000047]
> I'm curious what saw brand and model and if it has one of
those tool less chain tenisoner cover set ups.
>
> Only saws I see with that issue local been those.
>
> I install regular covers and tensioner set ups on them and no
more issues.
>
--- End Quote ---
Cut4fun, do you have part#'s required for that conversion? I
have a 450e and that is my problem, ill sometimes have to
tighten my chain every few cuts.
[/quote]
None on hand I have to order like you would. Is yours the one
bar nut cover. Then use IPL to order cover.
If one this might be the one you need for 450
HTML https://www.ereplacementparts.com/clutch-cover-assembly-p-616431.html
HTML https://www.ereplacementparts.com/husqvarna-450-201009-chainsaw-parts-c-114486_114487_275681.html
#Post#: 88642--------------------------------------------------
Re: Chain keeps slackening
DIR By: jimc295
Date: November 3, 2021, 6:18 am
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It is the one nut, it has that tool less thingy on it. is that
what you usually replace just the single nut and the adjuster?
#Post#: 88644--------------------------------------------------
Re: Chain keeps slackening
DIR By: Cut4fun
Date: November 3, 2021, 7:42 am
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--- Quote from: jimc295 link ---
>
> It is the one nut, it has that tool less thingy on it. is that
what you usually replace just the single nut and the adjuster?
>
--- End Quote ---
Never did the 450 myself swap as they all been this normal 1
nut clutch cover that come in But yes should be a direct swap
in. Part number 544097902 so you can search for used too.
Bunch on ebay too. Looks like there is even some cheaper
aftermarket covers too.
HTML https://www.ebay.com/sch/i.html?_from=R40&_trksid=p3671980.m570.l1313&_nkw=+544097902&_sacat=0
#Post#: 88648--------------------------------------------------
Re: Chain keeps slackening
DIR By: jimc295
Date: November 3, 2021, 10:43 am
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Thank you sir, very helpful.
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