Torque wrech?

[Clackb@]

I've gone over a bunch of ms660 build videos in rep for my own build. The one thing that is absent in all of them is a torque wrench. Do you guys bother with Stihl factory spec torques on you fasteners during assembly?

 

[traffic903]

Nope, except for the flywheel.

 

[angelo c]

Too hard to read the torque specs in Chinese...

 

[NCFarmboy]

I do but I DO NOT use the Chinese screws OEM on cyl. and crankcase. Torque specs are usually in Nm. I use a Snapon 3/8" dr. In lbs/Nm wrench. I do not torque fly wheel nut I buzz it on w/Green Ryobi impact driver.
Shep

 

[huskyboy]

I wouldn’t use a impact on the flywheel nut. I use a torque wrench for that on any saw. I look up the recommended ft lb to tighten to and follow that.

 

[CR888]

We probably should but most don't as issues don't seem to arise from just doing it by hand. After a while you get a feel for what torque all the different fasteners need. We get away with it....so laziness wins.

 

[smokey7]

Same thing with wrenching on cars very few things get torqued. If i torqyed eveeything to oem spec id spend most of my day looking up the specs . i wouldnt make any money. You get the feel and trust your judgement and move on.

 

[cus_deluxe]

You get the feel and trust your judgement and move on.

This.

 

[Larry B]

I like to send my hands out every year to get them NIST/ANSI/ASTM torque accuracy certified. You can never be too careful about torque specs. Next year i may get them Germany certified to the Gutentight standard.

 

[MustangMike]

I do it all by feel also, putting a little extra muster on the cylinder bolts and flywheel nut. On the cylinder, I do my pattern several times, and flex that T handle near it's max.

I also use Loctite on them, and make sure the surface of the flywheel and crank have been cleaned. Any grease or oil in there will result in a spin.

Make sure you block the piston (w/rope) and I tighten that nut just short of stripping it with a 1/2" drive ratchet.

After one leaking cylinder, and 2 flywheel spins, you learn to be very careful in these areas to not let it happen again.

Cleaning and prepping of the parts is very important, especially when not using a cylinder gasket. A light sand and clean with brake cleaner is cheap insurance against failure.

 

[CR888]

The OEM workshop manuals usually have all the torque specs for fasteners in NM. So they are available for those who want to use them. I think those who build a lot of saws know what fasteners a vulnerable to coming loose, getting heat seized or causing damage being too tight. They usually use sort of loctite product in some places & perhaps a heat (copper) style anti seize paste on muffler bolts. Or in some cases change out the fasteners to the ones with serrated heads so they stay put.

 

[Lone Wolf]

I like to send my hands out every year to get them NIST/ANSI/ASTM torque accuracy certified. You can never be too careful about torque specs. Next year i may get them Germany certified to the Gutentight standard.

Ya!

 

[deye223]

I just crank it up until my elbow goes click and voila it's done