Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: KilliansRedLeo on September 27, 2013, 09:17:02 am

Title: Husqvarna Crank bearings and crankshaft installation
Post by: KilliansRedLeo on September 27, 2013, 09:17:02 am
On another site I did a tutorial on the factory method and tools to do this. If anyone is interested, I will reconstruct it.
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: 660magnum on September 27, 2013, 08:02:46 pm
This is a chainsaw repair site so I can not think of a better place to post your tutorial?
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: oldtimber on September 28, 2013, 10:41:51 pm
Most definately, thanks for the offer.
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: KilliansRedLeo on January 11, 2014, 01:58:17 pm
OK, the next tutorial will be this one.

The idea is to take a 372 bottom end that is in need of bearings, seals etc and demonstrate how to use the Husqvarna factory tools recommended for this maintainence. There are techniques and factory supplied tools that the factory recommends for doing the work. We will actually do the work and demonstrate the tools as well as explain what the tools are actually doing for you.

Will not be complete teardown of the saw, we will start with an already stripped down saw, split the cases, remove the old bearings and seals, install new bearings and seals as well as reinstall and center the crank.
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: alsled on January 12, 2014, 08:02:32 am
Im looking forward to see how its done right.  First off, the 372 is my bottom end  ;D, next, I'm tired of doing bearings the redneck way ::)
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: KilliansRedLeo on January 12, 2014, 09:28:29 am
No Problem alsled, it is my pleasure! I get the subject for a tutorial and you get a rebuilt 372XP bottom end. Now all you need is a Hyway 372XP 52mm BB kit and a Stihl 064 piston and you will have quite the runner! A 52mm 272XP piston will also work but you will have to send it out to have the squish band cut, $40 from Mastermind, and you could hit 0.020 on the squish without a base gasket!
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: alsled on January 12, 2014, 03:09:22 pm
I have a 365 with a BB kit, I wana see hoe the 372 runs. I'm sticking a Meteor piston in it, and no base gasket, and muffler port
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: tntblaster on October 21, 2014, 06:54:00 am
I guess the OP never got back to it? Whats the other site w/ the tutorial?
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: Cut4fun . on October 21, 2014, 07:04:50 am
I dont know why he didnt finish up the thread here using the right tools?

There is other threads here on redneck methods me and others use too. 
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: KilliansRedLeo on October 21, 2014, 04:25:01 pm
I have not yet gotten to do the thread because I have not yet come across a 372 saw in need of bottom end work. I did a quickie on FHC just to show the tool and how it works. If anyone has a 365/371/372 that needs bearings and wants it done PM me. I will do the work, supply new bearings/seals/gaskets for your saw just to do the tutorial. You pay shipping both ways. I only need the bottom end not the complete saw.
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: Cut4fun . on October 21, 2014, 05:02:38 pm
David Young is a member here with that 362.
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: KilliansRedLeo on October 21, 2014, 05:30:01 pm
I sent TNTBlaster a message, I'll send one to David Young also. Thanks Kevin!
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: David Young on October 22, 2014, 09:37:57 am
expect a tutorial here in the next week. ;D

in case you haven't seen here is the victim.

Failure caught on video

https://www.youtube.com/watch?v=3qstxPOfi8k&list=UUpS_xbeHHNESX8fJgKk9JDw

the results

http://s194.photobucket.com/user/joeking_photo/library/362xp?sort=3&page=1

Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: aclarke on October 22, 2014, 09:46:30 am
Gnarly!  What failed?

Adam
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: 660magnum on October 22, 2014, 09:50:14 am
Cannot get the Photoshop link to work?
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: David Young on October 22, 2014, 09:59:45 am
Gnarly!  What failed?

Adam

i guessed crank bearing

another guess was the plating let go shifting the ring and the ring popped through the crown at the locator pin.

what do you think?
David


Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: 660magnum on October 22, 2014, 10:22:44 am
It's a mess

(http://i194.photobucket.com/albums/z158/joeking_photo/362xp/IMG_4214.jpg) (http://s194.photobucket.com/user/joeking_photo/media/362xp/IMG_4214.jpg.html)
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: David Young on October 22, 2014, 10:45:33 am
It's a mess

(http://i194.photobucket.com/albums/z158/joeking_photo/362xp/IMG_4214.jpg) (http://s194.photobucket.com/user/joeking_photo/media/362xp/IMG_4214.jpg.html)

thank you
that gray stuff is from aluminum, it is what you get when you try to polish aluminum,  there was a lot of it.
if you look on the piston  you can still see the machine marks,  fairly low hours.
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: KilliansRedLeo on October 22, 2014, 12:06:46 pm
Are you sure the rod big end bearing on the crank did not fail? Grab the rod and check for up-down play at the big end of the rod. If any noticeable play, and you are looking at a new crank, OEM only, none of that Chinese stuff!

Usually when a crankcase main bearing fails the counter weights will contact the case, rubbing it raw, check for that also. Use bright light and dentist's mirror.
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: Cut4fun . on October 22, 2014, 12:54:18 pm
Seen the big end go out on a good bit here. Check her out David.   I only used new oem kits or used good. 
Some folks say they have had good luck with some of the aftermarket ones, but I was scared to do it for a saw I would evidently sell down the road. If I had kept them I might have tried one.
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: KilliansRedLeo on October 22, 2014, 01:18:36 pm
+1 on what Kevin said above! Check it out!
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: David Young on October 22, 2014, 02:05:37 pm
Seen the big end go out on a good bit here. Check her out David.   I only used new oem kits or used good. 
Some folks say they have had good luck with some of the aftermarket ones, but I was scared to do it for a saw I would evidently sell down the road. If I had kept them I might have tried one.

I hear ya,

if I ever did let a saw with afm parts out of my hands, I feel ok as long as I disclose what parts are used.
Crank well too much can go wrong.  I don't know if I would try it.
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: aclarke on October 22, 2014, 05:05:23 pm
Looks like the ring caught something on the intake side, odd unless it has finger ports?
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: KilliansRedLeo on October 23, 2014, 09:02:22 am
There is also a chance that the locating pin in the ring groove backed out since I cannot see it in the picture. Spoke to David last evening, he believes that the big end bearings let go. More up/down play than in other saw bottom ends he has. He is sending the case and crank to me to be replaced. I'll put up some pics when it arrives.
Title: Re: Husqvarna Crank bearings and crankshaft installation
Post by: Cut4fun . on October 23, 2014, 12:22:01 pm
I may have a bad big end crank paper weight in the barn if anyone needs to view till then.