Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: UNCLEBEEF on March 09, 2013, 04:12:50 pm

Title: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 09, 2013, 04:12:50 pm
Hello All, new to the forum, ive been reading posts and enjoying all the info here. i own two husky 455 ranchers, one stihl 028 and just picked up a husky 372xp today. i fired the saw to make sure it ran before purchasing but i would like to find a service manual to help me with inspecting and servicing before i run it hard in the woods. any help will be much appreciated. thank you. Dave.
Title: Re: husqvarna 372xp new score! need service manual
Post by: Cut4fun . on March 09, 2013, 05:30:05 pm
Old school one or the new x-torq one?  Most of the old 372 SM will work though.

If you can tell, is de-comp on right side or top of cylinder?
Title: Re: husqvarna 372xp new score! need service manual
Post by: 660magnum on March 09, 2013, 06:20:31 pm
Look in your Email.  I sent you the one for the none XT version prior to 2010
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 10, 2013, 01:12:04 am
hello, thanks for the response! dcomp is on the right side, i found a compression gauge and checked it.... 120 after about 6 or 7 pulls. is this weak or ??? does anyone have a normal range or spec for a used saw? is it time for a rebuild of the top end? any help is appreciated. thank you.
Title: Re: husqvarna 372xp new score! need service manual
Post by: 660magnum on March 10, 2013, 01:44:47 am
I sent you the manual for the 372 with the decompression on the right side.

120 is a little weak but it should run OK. Closer to 150 is norm. Some were 140 new.

It is time to pull the muffler and look at the piston to see if it is scored. If not, perhaps all y0ou need is some rings?
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 10, 2013, 11:16:56 am
thanks for the manual Magnum, i pulled the muffler and looked at the piston, absolutely perfect, no scratches or scoring. i thought 120 was low and i was expecting to see some damage so...... run it or put some rings in it?
Title: Re: husqvarna 372xp new score! need service manual
Post by: Cut4fun . on March 10, 2013, 11:20:52 am
I have pics of worn 372 rings that pulled 120psi and then a new set of caber rings to compare to.
Title: Re: husqvarna 372xp new score! need service manual
Post by: Cut4fun . on March 10, 2013, 11:22:35 am
Here you go.

Just to show the newer guys the difference. You can see the wear and feel the psi difference pulling over.

372 50mm rings pulled from a running saw just getting low on compression 120psi, still ran and started good. Checked cold

Then new Caber 50mm rings with about 30 seconds of run in , idling and blips. Checked warm 140psi




(http://i59.photobucket.com/albums/g289/doemaster789/2171372BB372/rings002.jpg)
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 10, 2013, 12:14:33 pm
thanks for the pics, so.. i'm leaning towards reringing. do i need to do any prep to the cylinder or piston besides normal cleaning? should i run a hone and cross hatch or do they do that with saws?
Title: Re: husqvarna 372xp new score! need service manual
Post by: Cut4fun . on March 10, 2013, 12:20:30 pm
IMO do not use hone or hone it. I just take a green scotch brite pad like plastic material or something, whatever they are.
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 10, 2013, 12:28:53 pm
is that because you dont want to remove any material or another reason?
Title: Re: husqvarna 372xp new score! need service manual
Post by: Cut4fun . on March 10, 2013, 12:41:03 pm
You can go right through nikasil  coating real quick if not very very very careful.
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 10, 2013, 08:58:10 pm
o.k. i've been busy today before pulling the cylinder i pressure tested the crankcase. held 11.50 psi with no leaks. i pulled the cylinder and took some photos of the piston and cylinder, what do you think? i can see cross hatching in the cylinder bore. the cylinder and piston are mahle brand. to me it looks newer but i'm not a saw expert. do you think i can just put in rings and go or?
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 10, 2013, 09:09:04 pm
some piston pics
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 10, 2013, 09:10:27 pm
some cylinder pics
Title: Re: husqvarna 372xp new score! need service manual
Post by: 660magnum on March 10, 2013, 09:13:41 pm
Looks like it could use a new Meteor piston and rings to do it right.
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 10, 2013, 09:16:19 pm
do you think the cylinder is in good shape? is there any concern putting a meteor piston in a mahle cylinder? do they need to be be matchng brand?
Title: Re: husqvarna 372xp new score! need service manual
Post by: 660magnum on March 10, 2013, 09:26:39 pm
The cylinder looks really good

Meteor makes a piston and Caber ring especially for that cylinder. $35-$40 shipped from Israel or Greece

The old piston has some wear, you could put rings on it and go but there is a lot of skirt wear on it.
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 10, 2013, 10:37:41 pm
thanks for the help, i'll order parts tomorrow.
Title: Re: husqvarna 372xp new score! need service manual
Post by: Cut4fun on March 11, 2013, 07:03:15 am
50mm ?   Meteor  372 piston kit $38.95 right here is US  already Northwood Saw  http://northwoodsaw.com/store/index.php?l=product_detail&p=37
Title: Re: husqvarna 372xp new score! need service manual
Post by: 660magnum on March 11, 2013, 09:07:03 am
The Meteor kits from Greece or Israel take a month to arrive.
Title: Re: husqvarna 372xp new score! need service manual
Post by: Magnus on March 11, 2013, 09:16:12 am
Were do you order them from?
Distributer/producer or E-bay seller?
Title: Re: husqvarna 372xp new score! need service manual
Post by: 660magnum on March 11, 2013, 09:20:12 am
I was referring to the two guys on Ebay.
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 23, 2013, 12:44:52 pm
Hello, thought I would give an update on the saw. I received all the parts and installed them. started with a new 50mm meteor piston with a single caber ring. I made a scotchbrite flap wheel hone using a piece of pvc as a mandrel and ran a little oil in it while cleaning the cylinder, this really worked good to clean up the cylinder .i hand sanded the cylinder with a 600 grit wet/dry and oil, the nikisil is so hard I don't think this did anything. installed a new base gasket, rebuilt the carb, replaced the fuel line and filter. now i'm adding another port in the muffler and then it's run time! I've seen different methods of attaching the new shroud on the muffler. I used a thread setter to install to 5mm inserts in the muffler, hopefully this will allow easy removal for cleaning the screen later on. I do have a question on initial break in. do I need to baby it or put it in wood and tune? what method has worked best for you? any help or opinion is appreciated.
Title: Re: husqvarna 372xp new score! need service manual
Post by: 660magnum on March 23, 2013, 02:08:13 pm
I just tune them a little on the rich side. I don't do any buried cuts for a while.
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 23, 2013, 03:57:16 pm
alright will do. here's a couple pics of the muffler mod.
Title: Re: husqvarna 372xp new score! need service manual
Post by: 660magnum on March 23, 2013, 05:37:02 pm
You did a good job on that muffler.
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 23, 2013, 07:12:03 pm
say what... ears are still ringing! thanks. went out and ran it for about 45 min while I adjusted the carb and made a few cuts. I noticed that it comes up in rpm fast and has a good torque band. so far so good, i'll run it more when the darn wind quits whipping....with ear protection!
Title: Re: husqvarna 372xp new score! need service manual
Post by: Cut4fun . on March 23, 2013, 07:54:32 pm
Nice.

(I used a thread setter to install to 5mm inserts in the muffler)
Can you show how those  are done and what they look like before and how do they stay in?

I have read about a thread rivet insert, but never tried those.  http://www.rivetsinstock.com/rivet-nuts-threaded-inserts.html

I just started riveting permanently them because I dont use screens and the self thread screws always seem to back out on me.

Just looking at others ways too. 

Thanks,
Kevin
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 23, 2013, 08:08:21 pm
hey Kevin, i don't currently have any pics of the tool.I used a tool from work but if you search Marson thread setter....that's what I used. you simply drill the correct size hole and it installs just like a rivet, the inside folds over and holds similar to a standard rivet. I used a 5mm thread insert and drilled a 9/32 hole. I also put anti-seize on the bolts prior to installing, that way taking apart later will be a breeze.
Title: Re: husqvarna 372xp new score! need service manual
Post by: fatboycowen on March 26, 2013, 07:28:45 am
I wonder if this would work.

http://www.harborfreight.com/45-piece-threaded-insert-riveter-kit-1210.html
Title: Re: husqvarna 372xp new score! need service manual
Post by: Cut4fun . on March 26, 2013, 11:26:20 am
I wonder if this would work.

http://www.harborfreight.com/45-piece-threaded-insert-riveter-kit-1210.html


If I make it over to HF before muffler modding 353 with side deflector I will look at those to see.  Thanks for posting. 

I'd like to see if OP has feedback on his to see if the bolts back out of the threaded part after some run time on it.
Title: Re: husqvarna 372xp new score! need service manual
Post by: UNCLEBEEF on March 26, 2013, 02:48:36 pm
that tool is very similar to what I used. I've ran two tanks of fuel so far, bolts are still tight.