McCulloch Chain Saws

Arborist Forum

Help Support Arborist Forum:

This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Syncop8r - the outlet check valve is in the body of the automatic oil pump, or in the separate check valve on saws with manual oiler only. Some of the automatic oil pumps have a screw you can remove to access the ball and spring. Others are sealed on top and your only option to a dirty, sticking check valve is to try to shoot some carburetor or brake cleaner through it and hope that solves the issue.

The outlet check valve on manual oiler only saws look like one or the other of these. They attach where the automatic oil pump would be located.

View attachment 1031765

On this type of automatic oil pump you can remove the screw and let the ball and spring out to allow more thorough cleaning if needed.

View attachment 1031766

Mark
Thanks Mark - looks like I (hopefully) only have one check valve to replace then.
 
Truss head screws are a phillips head screw with a slight convex shape.
Fil or fillister are a cylindrical head screw. The one that holds the condenser on is fillister. Also some manual oil pumps are held on with fillister head screws. Kinda hard to describe it...lol
OK, (L-R) Truss Head, Pan Head, Fillister Head?
IMG_20221113_163549.jpg
Which would make them (L-R) bottom points (with washer), top points, condenser (with nut).

I promise I won't mix them up again. 😅
 
Thanks guys. 👍

I'll put the one felt washer I have between the teflon ones and just have to live without the felt one behind the points box.
You can get a sheet of felt a nearly any hobby store. It'll be crafty!
 
The earliest models had non vented caps and a hole in the tank with a cotter pin stuck in it for a vent.

View attachment 978111

Some models had a more elaborate cap with a duckbill valve and that disc that often shows up in the bottom of the oil tank.

View attachment 978110

Still others had a vented cap that just had a piece of felt in it.

View attachment 978112

Mark
Mark, I'm sure this has been mentioned but after searching through hundreds of pages, I'm lost. My cap check valves have since dissolved.

Do you know what duck bill valve fits a Pro Mac 10-10 bar oil cap?
The IPL shows a McCulloch part number 86402. The remains of the "flange" piece was in place and measured roughly 5mm. I've narrowed down the gas cap vent to Oregon 07-004/Stens 610345/Homelite 69541 or the longer Poulan 530026119 from a photo you posted!
Can I assume the longer Poulan type will not work in the bar oil cap? Some no name Amazon items have reviews where they don't hold up to fuel or oil and turn to goo. Rather than waste time and $ on the wrong parts, what have you found that works?

Any help is greatly appreciated!!
 
The only ones that I am aware of that actually fit the space available are the OEM type 63041/86402 and they are very hard to find. The red Homelite valves can be made to work if you drill the retainer (plastic disc) to 5/32".

20221114_074720.jpg

20221114_074740.jpg

20221114_074808.jpg

It is important to keep the hole exactly in the center so it will properly align with the duckbill valve.

20221114_075405.jpg

20221114_075718.jpg

20221114_081350.jpg

Mark
 
The only ones that I am aware of that actually fit the space available are the OEM type 63041/86402 and they are very hard to find. The red Homelite valves can be made to work if you drill the retainer (plastic disc) to 5/32".

View attachment 1032137

View attachment 1032138

View attachment 1032139

It is important to keep the hole exactly in the center so it will properly align with the duckbill valve.

View attachment 1032140

View attachment 1032142

View attachment 1032144

Mark
Thank you for the insight!
 
I was sorting/organizing the drawers with sharpening supplies last week (files, guides, file-o-plates, etc.) and came across a bag with a variety of file plates with your name on it Clint, so they are still here waiting for you...

On that subject, if anyone is in need of 1/8", 3/16", or 1/4" round files, I have a great surplus. Many are unbranded and some are a bit rusty from improper storage over the years but all are NOS.

Mark
 
I was the winner of a 5-10A on Feebay last night for $36.The saw looks to be in good shape,but I know nothing about the mechanics of it.The saw is complete & has a Walbro SDC carb.I should have it by week's end,weather pending (we're supposed to get slammed with up to 2 ft.of snow by Sun.).
I forgot to mention that originally the seller had this saw listed for $45 or MO.I offered him $40 & he countered with $50.Next thing was he relisted it for 99 cents.I made 2 bids,one for the 99 cents,the other fgor $40.It never made it to the $40.I guess he should've accepted my first offer.
 
With the DE8200 complete, I moved on to a PM10-10 I acquired with the assortment of saws from my older brother.

I looked pretty clean so I figured a partial tear down, clean it up, replace bits as needed, and put it up on the "For Sale" shelf.

The first thing you notice is the non-standard spike...I believe this is standard issue for the 33/35/39 model saws.

20221114_145809.jpg

20200224_165305.jpg

This is the second in two weeks with the spring clip that is intended to secure the automatic oil pump in place just flopping loose.

20221115_063618.jpg

I started the tear down for cleaning.

20221115_063651.jpg

I kept going further on the tear down until it was just a short block. Everything cleaned up pretty nicely, the saw was supposedly a good runner before I got it, but I thought I'd pressure test just to make sure everything was copacetic.

PTO side seal was leaking...

20221115_113011.jpg

Sorry about that, keyboard quit working on me. Crankcase was leaking too...

20221115_130706.jpg

20221115_113131.jpg

While I was at it I thought I'd confirm my theory about the flange on the oil pick up line and the disc check valve in the manual oiler.

Thick flange on the oil line...

20221115_130932.jpg

Thin disc for the manual pump check valve.

20221115_131006.jpg

Mark
 
20221116_145056.jpg

20221116_164043.jpg

20221116_164054.jpg

20221116_163445.jpg

Cleaned up nicely, starts and run well. Not sure I'll ever need to use it...

If it warms up a bit one day I'll look around in the attic of the garage to see if I have that top cover / muffler shield. I think it shares that part with a couple of string trimmers.

Mark
 

Latest posts

Back
Top