Chainsaw Repair

Husqvarna - Stihl - Poulan - Jonsered - Dolmar chainsaws and more => Husqvarna => Topic started by: trail twister on November 08, 2016, 11:12:31 am

Title: 55 EPA
Post by: trail twister on November 08, 2016, 11:12:31 am
Picked up a husky 55 EPA, scored piston but the cylinder cleaned up. Found the reason carb chocked totally full of saw dust I mean full behind jet screws and in the diaphragm.

Not sure if I want to just buy a 44mm piston or for close to the same money buy a cylinder and piston kit for 46MM(?).

Also have given thought about just a new ring on the old piston as it cleaned up fairly nice.

(http://i280.photobucket.com/albums/kk194/oldmasseyguy/Chain%20saws%20and%20fire%20wood/Piston%20004_zpsui42qfkp.jpg) (http://s280.photobucket.com/user/oldmasseyguy/media/Chain%20saws%20and%20fire%20wood/Piston%20004_zpsui42qfkp.jpg.html)

(http://i280.photobucket.com/albums/kk194/oldmasseyguy/Chain%20saws%20and%20fire%20wood/Piston%20001_zpsuzrhufq4.jpg) (http://s280.photobucket.com/user/oldmasseyguy/media/Chain%20saws%20and%20fire%20wood/Piston%20001_zpsuzrhufq4.jpg.html)

 ;D  Al
Title: Re: 55 EPA
Post by: SawTroll on November 08, 2016, 11:37:56 am
There shouldn't be a 44 mm top end on any version of that model, but of course someone may have replaced the original with one. Measure the bore of that cylinder.

During the first years of the EPA version they used a closed port 45 mm top end though, instead of the more common 46 mm open port one. The serial number will help telling what your saw originally come with

The 45 mm closed port one is preferable to the 46 mm open port one, and more so if the 46 mm one is an aftermarket one and the 45 mm an OEM one.
Title: Re: 55 EPA
Post by: Cut4fun . on November 08, 2016, 12:51:58 pm
If it were me and that saw for my use on the cheap. I could clean that piston up and clean ring groove and new caber or oem ring to reuse.  Worse case buy new piston kit.

Nothing wrong with a 46mm open port topend on a 55. Makes a good firewood cutting saw IMO.  Heck I had a aftermarket 46mm open port with smaller ports then oem and it still did just fine.

Here is a nice aftermarket meteor kit. This topend has been run on a few folks saws now with good results. http://chainsawrepair.createaforum.com/husqvarna/meteor-46mm-closed-port-55-husqvarna-pc/msg52401/#msg52401   

More 55 info http://chainsawrepair.createaforum.com/husqvarna/husqvarna-55/

IMO if you can get good used oem try that first.  Cant go wrong with oem stuff IMO.

Title: Re: 55 EPA
Post by: trail twister on November 09, 2016, 06:12:13 am
I have measured the bore and it is a 44mm. I thought really strong on just a ring and still think that is what I will do.

 ;D  Al
Title: Re: 55 EPA
Post by: SawTroll on November 09, 2016, 11:19:06 am
I have measured the bore and it is a 44mm. I thought really strong on just a ring and still think that is what I will do.

 ;D  Al

44 mm fits with a 51 EPA, but not with a 55 EPA - but there also were other models that used 44 mm top ends that would fit on any of them.

Is that piston scuffed, or are there just carbon smears on it?
Title: Re: 55 EPA
Post by: trail twister on November 09, 2016, 12:21:36 pm
Piston is scuffed a bit.
Can you tell by the serial number.

 ;D   Al
Title: Re: 55 EPA
Post by: SawTroll on November 09, 2016, 01:59:35 pm
Piston is scuffed a bit.
Can you tell by the serial number.

 ;D   Al


The serial number will tell when it was made, and usually the model number it was when it left the factory also is on the tag.
Title: Re: 55 EPA
Post by: trail twister on November 10, 2016, 05:37:53 am
I'll try to get that today.

 ;D  Al
Title: Re: 55 EPA
Post by: Jeffbecky1 on November 11, 2016, 10:39:01 am
I'd buy a new ring and reuse that piston if it was my saw.
Title: Re: 55 EPA
Post by: trail twister on November 12, 2016, 07:23:35 am
I think I will do that, just buy a ring. To busy now to fool with it for a while.

 ;D  Al
Title: Re: 55 EPA
Post by: Cut4fun . on November 12, 2016, 12:16:02 pm
I think I will do that, just buy a ring. To busy now to fool with it for a while.

 ;D  Al

I take a fine journal polishing  type sand paper and go across cleaning the scuff some. NOT up down. Do it by going across easily.
Title: Re: 55 EPA
Post by: trail twister on December 08, 2016, 12:24:37 pm
Finally had a bit of time so I got the numbers off the plate left hand side near the top handle.

967 05 27 00
991302315


 ;D  Al
Title: Re: 55 EPA
Post by: SawTroll on December 11, 2016, 06:22:10 pm
Finally had a bit of time so I got the numbers off the plate left hand side near the top handle.

967 05 27 00
991302315


 ;D  Al

That should be a 55 Rancher made 1999 week 13, meaning it likely is a bit too early to have come with the closed port 45 mm top end.

According to the IPL, they came with the 46 mm open port at that point.

Is there a number in blue ink on top of the cylinder?

967 05 27 00 is the "part number" for the complete powerhead.
Title: Re: 55 EPA
Post by: trail twister on December 12, 2016, 07:59:32 am
I have seen 55 ranchers and the decals on the recoil say they are ranchers, this one doesn't.

(http://img.photobucket.com/albums/v295/oldgrumpy/my%20tractors/55sawandpiston.jpg) (http://smg.photobucket.com/user/oldgrumpy/media/my%20tractors/55sawandpiston.jpg.html)

I'll look for that blue ink number.

 ;D   Al
Title: Re: 55 EPA
Post by: SawTroll on December 12, 2016, 01:52:46 pm
The use of the "Rancher" designation may have been a bit "spotty", meaning it may have varied with time and market, but according to the IPLs the regular 55 came with a decomp valve in the cylinder and the Rancher not at that time.

Also, the source that told me that 967 05 27 00 meant Rancher may have been off

Pictures of the cylinder, including numbers and letters on it would be helpful.
Title: Re: 55 EPA
Post by: trail twister on December 13, 2016, 06:25:57 am
It has the decompression button, see what I can do with pictures. Bit busy cleaning up after the 10 inches to snow we got Sunday.

 ;D  Al
Title: Re: 55 EPA
Post by: SawTroll on December 13, 2016, 02:32:27 pm
It has the decompression button, see what I can do with pictures. Bit busy cleaning up after the 10 inches to snow we got Sunday.

 ;D  Al

Lots of snow here as well, and not the light variety.
Title: Re: 55 EPA
Post by: trail twister on January 03, 2017, 07:26:13 am
A couple of cylinder pictures.

(http://i280.photobucket.com/albums/kk194/oldmasseyguy/IMG_0666_zpsd4lsbfub.jpg) (http://s280.photobucket.com/user/oldmasseyguy/media/IMG_0666_zpsd4lsbfub.jpg.html)

(http://pic90.picturetrail.com/VOL2298/13430174/23965246/413058288.jpg)

(http://i280.photobucket.com/albums/kk194/oldmasseyguy/IMG_0667_zpsbglwumpc.jpg) (http://s280.photobucket.com/user/oldmasseyguy/media/IMG_0667_zpsbglwumpc.jpg.html)

(http://i280.photobucket.com/albums/kk194/oldmasseyguy/IMG_0669_zpsduyzyogs.jpg) (http://s280.photobucket.com/user/oldmasseyguy/media/IMG_0669_zpsduyzyogs.jpg.html)


I can see I need to clean up the numbers and take a close up.


 ;D  Al
Title: Re: 55 EPA
Post by: wild262 on January 03, 2017, 08:26:13 am
             Theres no question that being a closed port.  But what puzzles me is you said it measured 44mm!  I would think it ought to be 45mm.  I don't think the 44mm 51's were closed port.  Sawtroll would know.
Title: Re: 55 EPA
Post by: trail twister on January 03, 2017, 12:19:22 pm
I measured the cylinder with my inside calipers and I got 4.5.075 inch

Measured the piston and got 4.5.070

Cleaned up the lettering and numbers too.

(http://i280.photobucket.com/albums/kk194/oldmasseyguy/IMG_0669_zpsduyzyogs.jpg) (http://s280.photobucket.com/user/oldmasseyguy/media/IMG_0669_zpsduyzyogs.jpg.html)

(http://i280.photobucket.com/albums/kk194/oldmasseyguy/1-3-17%20%20chain%20saw%20jug%20003_zpsdyucvxra.jpg) (http://s280.photobucket.com/user/oldmasseyguy/media/1-3-17%20%20chain%20saw%20jug%20003_zpsdyucvxra.jpg.html)

 ;D  Al
Title: Re: 55 EPA
Post by: wild262 on January 03, 2017, 01:02:49 pm
Most likely a 45mm then, going by your readings.  If it will clean up, I would put it back in service.  That's a good looking 55 you got there.  I've only rebuilt a couple of them, but were the open port which still made good power.  Certainly enough for cutting wood.  Be sure your plastic bulkhead (divider),  is in good shape.  Had to replace both on the ones I redone.
Title: Re: 55 EPA
Post by: farmboy on January 03, 2017, 09:49:19 pm
Be  sure and replace the impulse grommet.  PN: 505-3107-51.
Shep
Title: Re: 55 EPA
Post by: SawTroll on January 04, 2017, 03:33:59 pm
             Theres no question that being a closed port.  But what puzzles me is you said it measured 44mm!  I would think it ought to be 45mm.  I don't think the 44mm 51's were closed port.  Sawtroll would know.

Yes, obviously a closed port.

As far as I know Mahle 44ZN15++++++ is compatible with a 45 mm 44ZN15, that was used on those closed port 55s. However, I don't know if it excludes all 44 mm versions. A5 and/or W3 may have something to do with the bore size.

The "original" 44ZN15 was the 44 mm Partner P5000 cylinder.

I don't think the 44mm 51s were closed port either, but I don't remember the source of that info...



Title: Re: 55 EPA
Post by: SawTroll on January 04, 2017, 03:45:55 pm
I measured the cylinder with my inside calipers and I got 4.5.075 inch

Measured the piston and got 4.5.070

.....   

I fail to understand those measurements?
Title: Re: 55 EPA
Post by: trail twister on January 04, 2017, 05:20:41 pm
Measurements are USA non metric. 4 1/2inches (.o70 Hundreds?)
Ya'll are probably right not sure how I got the 44 mm thing in my head.
 ;D  Al
Title: Re: 55 EPA
Post by: SawTroll on January 06, 2017, 08:47:04 am
Measurements are USA non metric. 4 1/2inches (.o70 Hundreds?)
Ya'll are probably right not sure how I got the 44 mm thing in my head.
 ;D  Al

That can't be the diameter though - did you actually measure the circumference, and not the diameter?
Title: Re: 55 EPA
Post by: trail twister on January 06, 2017, 09:13:34 am
I was using my calibers and measured from one side to the other so was the diameter not the radis . Same with the bore from one side to the other.

Need I do a picture, I can as it is pretty cold today. Really just right for wood splitting. Did some yesterday after noon and they were sure popping so easy.


 ;D  Al
Title: Re: 55 EPA
Post by: SawTroll on January 06, 2017, 10:50:40 am
45 mm is less than 2 inches, certainly not more than 4 1/2.... ???

Title: Re: 55 EPA
Post by: trail twister on January 15, 2017, 07:09:09 am
Will this piston ring fit my piston?
45 x 1.2mm Caber Replacement Piston Ring

The size is 45mm in diameter by 1.2mm thick, High Quality European Made by Caber.

 ;D  Al
Title: Re: 55 EPA
Post by: farmboy on January 15, 2017, 10:07:00 pm
No 45mm x 1.5mm. Caber is good to go tho.
Shep
Title: Re: 55 EPA
Post by: SawTroll on January 20, 2017, 07:00:27 pm
It still would be interesting to see how you could measure the bore to 4 1/2"+, as far as I know there isn't a single chainsaw with a bore that large ever made? It sounds more like you measured the outside of the cylinder, corner to corner?
Title: Re: 55 EPA
Post by: trail twister on January 23, 2017, 11:56:09 am
I took a regular tape measure to measure the piston and it came out 2 3/4 inches. I don't have any Idea what or how I got the reading with the calibers.

 ;D  Al
Title: Re: 55 EPA
Post by: SawTroll on January 23, 2017, 03:41:31 pm
I took a regular tape measure to measure the piston and it came out 2 3/4 inches. I don't have any Idea what or how I got the reading with the calibers.

 ;D  Al

That still is way too much for the bore (inside diameter) of the cylinder in question (and for the diameter of the piston). The diameter of the piston is a little smaller than the bore of the cylinder.