Stihl hedgetrimmer problem

[Vespasian]

The trimmer is an HS86R, in case it has bearin on matters..

 

Oh, thanks for the replies lads, I just felt I might end up havin to bin the damn thing.. but it seems the consensus is its repairable..  

 

Lurkalot

 

The engine runs fine, whats at issue is the star looking thingy coming out the engine part of the trimmer that rotates the gears on the head.. its not turning when the engine runs... I can hear somethin rattlin about when I start it up....

 

 

[Richard 1234]

Take the whole blade/gearbox assembly off and you will likely find the issue.
Worst case would be snapped crankshaft I would think. More likely the keyway on the inside that connects the crank to the gearbox has broken

[EricBradley]

sounds like clutch spring has snapped or one side of the clutch shoe carrier has cracked allowing one shoe to fall.

[spudulike]

Just split the clutch/gearbox drive part from the engine and you may find that the drum has sheared from the sprocket or the clutch has disintegrated. If you can't do it, take it to you local fella who can. Not a massive job and worth it as these machines are generally pretty good.

[monkeymoreton]

If your engine is damaged I have one that's missing the flywheel

[lurkalot]

2 hours ago, spudulike said:

Just split the clutch/gearbox drive part from the engine and you may find that the drum has sheared from the sprocket

As  it turned out to be a HS86R that will definitely be the problem, it uses the same drum as a HS81R and I have a pile of them which have come apart, it's a really crappy joint by Stihl, although they won't admit it.

[openspaceman]

11 hours ago, lurkalot said:

As  it turned out to be a HS86R that will definitely be the problem, it uses the same drum as a HS81R and I have a pile of them which have come apart, it's a really crappy joint by Stihl, although they won't admit it.

The brazing is like a shear pin, it protects the more expensive bits.

 

On the rail work it was a fairly regular occurrence because hedgecutters were used instead of  brush cutters to avoid flinging bits about, so they were cutting stuff above their design capabilities.

 

I did wonder about making a jig to reflow the braze but decided the effort was not woth it compared with a genuine replacement clutch drum.

[lurkalot]

11 hours ago, openspaceman said:

The brazing is like a shear pin, it protects the more expensive bits.

No, it just fails when it shouldn't 

[HDAV]

On 25/09/2017 at 09:54, openspaceman said:

The brazing is like a shear pin, it protects the more expensive bits.

 

On the rail work it was a fairly regular occurrence because hedgecutters were used instead of  brush cutters to avoid flinging bits about, so they were cutting stuff above their design capabilities.

 

I did wonder about making a jig to reflow the braze but decided the effort was not woth it compared with a genuine replacement clutch drum.

Why not use the proper bladed scrub cutters? Must be awkward as hell using the hedge cutter like that?

 

 

 

http://www.stihl.co.uk/STIHL-Products/Grass-Trimmers-Brushcutters-and-Clearing-Saws/Accessories-for-grass-trimmers-brushcutters-and-clearing-saws/Attachments-for-brushcutters/275187-28031/FH-145-adjustable-scrub-cutter.aspx

[Steven P]

can I sort of hijack this with a quick and related question? My 'spares or repair' - which runs moslty OK (HS65AV), has a clutch problem (and a couple of others too, but I got it cheap for the blades) - the blades are always engaged.

 

So the question is how do you get at the clutch to have a look? I can take off the housing on the starter side (the left), there arw no obviious external bolts on the right side, are the seccuring bolts fastened from the inside? Simpe instructions would hekp.

 

Appologies for hijacking with my quesiotn, I am hoping thr advice would be the same for mine and the OPs headge trimmers