Author Topic: McCulloch oil pump problem (Read 7893 times)

turbo33 · « **Reply #50 on:** January 08, 2014, 09:00:51 am »

I know this is an old thread, but I thought I would share my experience incase it helps anyone.
I had a problem with my oil pump, same as above. After stripping it, I figured it was missing a ball bearing to act as a valve. The oil enters the pump through the gauze. The manual pump draws it on the return stroke, then should push it up the hole that the pic above has a bearing in. I left that clear and I popped a 3.5mm ss steel bearing in the larger hole this side of the gauze.Whilst I was at it, I replaced the smaller ball at the top of the piston valve with a neww ss 2.5mm. Now works as good as new!!
The model is a Mac 4000. 16" bar. Can't fing any info on it anywhere!

qwerty12 · « **Reply #51 on:** March 18, 2014, 01:31:37 pm »

Well...thanks for replay...its been ages and i stil hawe not managed to fix that damn thing.

One thing is not clear to me...how oil comes down in pump when that 3.5mm bal is there?

Under the bal is a gasket and under gasket is a metal plate...so ball has not lot of space to move and make free way for oil...

anyway i found one 3mm ball in house and i will try it as soon is possible.

dutchsawdoctor · « **Reply #52 on:** March 23, 2014, 05:04:01 am »

Last hope for that saw, befor the extruder come's

qwerty12 · « **Reply #53 on:** March 23, 2014, 11:49:12 am »

I still have not managed enought time to try that thing with that ball....buth i will try it as soon I catch the time...

if it will worke its great
if not...panda be sadd
https://www.youtube.com/watch?v=I6vPRaIrvqU

mikehonda · « **Reply #54 on:** December 01, 2014, 12:45:56 am »

yeah that looks like the powermac 380 or the promas440 av the titan models use the same engine but different oil pumps. also there is an eager beaver 2.3 model like that you can usually find for sale on ebay.

mikehonda · « **Reply #55 on:** September 21, 2015, 07:42:19 pm »

thats a powermac 380 a new oil pump is like 25bucks on ebay, that same oil pump is used on an electric model as well. The engine is the same top end as a titan 40

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Author Topic: McCulloch oil pump problem (Read 7893 times)

turbo33

Re: McCulloch oil pump problem

qwerty12

Re: McCulloch oil pump problem

dutchsawdoctor

Re: McCulloch oil pump problem

qwerty12

Re: McCulloch oil pump problem

mikehonda

Re: McCulloch oil pump problem

mikehonda

Re: McCulloch oil pump problem

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