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Author Topic: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild  (Read 2572 times)

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Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #20 on: January 03, 2019, 10:02:13 AM »
It's not leaking as far as I can tell. I'm just worried that the brake band may not be secure anymore. There's a stud at the end of the band that looks like it was secured in a recess on the chunk that's missing. I also think the missing chunk might have been bridged to the handle with a rubber damper, which is long gone. I also dislike that the clutch is now unshielded. I might keep it if I can jury rig a new piece to keep the clutch shielded, maybe jb weld a strip of aluminum around the damaged area. I don't doubt the saw has been run this way for some time, but I'll be on the lookout for a new crankcase, nonetheless.

Offline mike_belben

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #21 on: January 03, 2019, 04:15:40 PM »
I think i paid like $70 shipped for mine, probably from huztl.
Revelation 3:20

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #22 on: January 03, 2019, 05:41:58 PM »
Are Huztl parts good quality and fit? The prices sure aren't bad.

Offline mike_belben

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #23 on: January 03, 2019, 05:50:30 PM »
I dunno, kinda subjective.  Not near as good as oem, not near as expensive.  If all i could use was oem, itd be a broken saw sitting in a box right now for lack of funds.  Instead it cuts a few cord a month and i scrape by.  

Huztl has been the best chicom stuff ive used. Though not without the occasional flaw to work around. Have rebuilt many saws top to bottom with their under $60 kits.  Many werent worth investing much more.  I port most jugs and hone most bores myself so that removes some of the flaw factor. 
Revelation 3:20

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #24 on: January 06, 2019, 01:39:30 AM »
Pulled the carburetor off. It's a Walbro HD 12A 912. I'm gonna replace all the rubber lines and gaskets- probably the cylinder boot as well.  

 

 

 
Had to wait on pulling the boot after the cylinder because the band clamp was rotated such that a screw driver couldn't access it.



Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #25 on: January 06, 2019, 01:47:32 AM »
Got the cylinder off. Lot's of carbon residue inside. Ran my fingernail around it's circumference and it would catch here and there. Not sure if that's just residue or actual scoring. This one measures 48mm ID which is stock I believe. I think I'd like to upgrade to the 372xpw cylinder on this saw along with the taller air filter. I think the crank may be reusable, but I'll probably get new bearings. 

 

 

 

 

 

 

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #26 on: January 06, 2019, 10:01:35 AM »
Anybody know what the threading size is for the flywheel shaft? I'd like to make a fitting that will hold a degree wheel when I get down to timing later. Thanks.

Offline Al_Smith

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #27 on: January 06, 2019, 08:48:38 PM »
Do what you want about that piston but if you want you can buff it out and it should be fine .A low spot won't hurt you but a high spot could because it can break the surface tension of the oil film which is thin anyway .That saw can go a long ways before it ever dies on the vine . 

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #28 on: January 06, 2019, 09:10:52 PM »
Is Emery cloth a good choice for cleaning out these cylinders? If compression is still good afterwards, I guess that's what really maters.

Offline mike_belben

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #29 on: January 06, 2019, 10:29:33 PM »
Carb cleaner will break down the gum.  A ball brush hone with ATF is better than emery cloth but make due with what ya got i guess.  

I use a drill chuck to hold my degree wheel.  Itll chuck onto any flat crank end regardless of thread pitch or diameter.
Revelation 3:20

Offline Al_Smith

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #30 on: January 06, 2019, 10:33:42 PM »
 3m green pads and kerosene work well .They are light abrasive and don't leave abrasive residue behind .Some people wind strips on an arbor and use a  drill to rotate them.I just use old fashion elbow grease .The end results are the same,mine just takes longer .I once used a flap wheel on a die grinder and ground right through the plating,haste does make waste at times . 

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #31 on: January 06, 2019, 10:40:08 PM »
Ok. Good suggestions. Thanks!

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #32 on: January 10, 2019, 01:26:05 AM »
Pulled the piston yesterday. There's probably a specific tool for this but I just used a brass punch backed up by a 2x4.


 

The ring snapped during removal. Debating if I should just replace ring for $9 (Caber) or get a Tecomec kit that includes piston, wrist pin, Caber ring, etc for $14.00.


 

Soaked the piston and cylinder in chem dip for 30 min, followed by scotch brite scrubbing and 1 hour soak hot pine sol and distilled water, then a full day in chem dip while off to work. The piston and cylinder cleaned up nicely, smoother than I expected. The only thing that refused to clean up was the exhaust port. I resorted to scraping at it with a dentist tool, which removed about 60% of the exhaust carbon before I gave up.



 


 

 

This is probably the worst area on the piston, just above the ring groove.



 




Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #33 on: January 10, 2019, 01:33:15 AM »
Next pulled the flywheel with a puller I made from 3/16" flatbar I had on hand. Be sure you don't lose the little springs and washers backing up the starter pawls when you take this apart.


 

 

 


Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #34 on: January 10, 2019, 01:45:36 AM »
Next up is the clutch group. First an e clip retains everything to the crankshaft. 



 


 

Next comes what looks like a preload or spring washer and the chain sprocket.


 

Then the clutch drum. Looks slightly corroded.



 

I'll post more tomorow... dozing off.

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #35 on: January 10, 2019, 10:09:02 AM »
Now that the clutch shoes are exposed I can see a loose piece. I'll find out later this snapped of the shoe itself.



 

Since this dissasembly happened a little out of order there wasn't much left on the saw to arrest the crank for clutch removal. I wound up using a stick of pine wedged between the counterweights and the crankcase. The planing stop on my bench came in real handy as a back stop for the breaker bar. That's the standard 3 prong clutch tool - I've seen several people make these out of 1" sockets. Don't forget, the clutch is left hand threaded, so righty-loosy.




A video would have been better to demonstrate the removal of the shoe clips, but basically you just need to push a flat blade screwdriver against the lip and rotate down on one ear, then repeat the motion on the other ear, so that the notches escape the shoe. Repeat x3 .




Here you can see where that loose chunk belonged.



 

I'll be replacing the clutch, but for curiosity's sake I found that the shoe was still 3.72mm thick. The service manual suggests replacement at 3mm.




Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #36 on: January 10, 2019, 10:35:13 AM »
Next came the chain brake spring. Just lever up the far end and pull out to the left.

 

 

The rest of the brake band will lift out if you pry just under the attachment points.



 

 



Service manual says I need 0.8mm thickness on the brake band. Should be good then.



 

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #37 on: January 10, 2019, 11:17:01 AM »
Now for the oil pump stuff. First the pump pinion (looks like a plastic propeller) just rotates off with finger pressure.



 

 



Now remove the oil tube, first by lifting up the rubber shim on the right side. Then rotate and pull up and out.

 







  

Then remove 2 allen screws and the pump should lift out with some gentle prying.



 

 

This part doesn't look complicated and the spline teeth look good, so I'll keep it.





I also noticed a washer and bushing under the pump. Stored these away so they don't get lost.



 

Offline Somewhat Handy

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #38 on: January 10, 2019, 11:18:36 AM »
All that's left at this point is a crank in a crank case. I'll go back over the pulled parts now and make a list of what I'm going to purchase.

Online lxskllr

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Re: Intro Post - Dad's old saw - Husqy 365/372 - Rebuild
« Reply #39 on: January 10, 2019, 12:09:21 PM »
Good thread. Thanks for all the pictures  :^)


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