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

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Offline qwerty12

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McCulloch oil pump problem
« on: April 07, 2013, 11:43:08 am »
Hello to All. I have an old McC saw and its in 1000 peaces  ;D
Here are few pics:




Do you folks know what model it is?
Anny manual or parts list for that saw?


If not its not the problem I will figure somehow to make it working again. My biggest problem was(before I dissambled it) was no lubrication of chain at oll.

It using this kind of oil pump:


and no matter how I put it inside and whathewer I do it wont lubricate chain.  Does anny of you folks know how to make this oil pump working.

How much this metal tube(red arrow) should be indise the pump?



Please help

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Offline qwerty12

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Re: McCulloch oil pump problem
« Reply #1 on: April 07, 2013, 02:03:33 pm »
Well...I assambled the chainsaw today. Oil pump to. Cleaned ewerything to perfection...still got no oil on the chain bar and chain.

Something strange happens all the time. On the oil cap side,bellow the exhaust, there is a small bleed hole wich serves as air inlet hole as oil is getting used and dissapears. On that werry hole when I press full trottle oil is comming out it bublles if oil tank is full... Buth on the chain side a hole which should be draining oil hotthing happens. No oil.

Checked all holes, cleaned them. Made new gaskets. Tryed ewerything. And no oil on chain. :(

Please help, i am getting disenchanted totally




EDIT:

Here are few oil pump pictures beffore cleaning:





Offline brokenbudget

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Re: McCulloch oil pump problem
« Reply #2 on: April 07, 2013, 02:49:56 pm »
take the pump off and soak it in some kerosene for a few days. the check valves are gummed up. and you can't take them out for service.
another thing to try is in a container big enough, submerse the pump housing with the piston/spring instaled and tap the piston in/out very fast and firm. unscrew the limiting screw to add some more stroke to the piston. gawd sounds dirtay :D
you'll notice when the little check valves come loose. lift it out of the kerosene (or diesel) and give the piston a few pumps. you should see the level in the intake port go down. and the output port go up. keep doing this for a while, then switch over to a light oil. should clear the oiler out so it works again.
when I grow up, i wanna be an adult.

Offline qwerty12

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Re: McCulloch oil pump problem
« Reply #3 on: April 07, 2013, 03:51:59 pm »
I cleaned it today perfectly and still no oil  :(

Offline brokenbudget

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Re: McCulloch oil pump problem
« Reply #4 on: April 07, 2013, 04:15:00 pm »
the little check valves in the pump housing are still stuck. if you're seeing 'pressure', or bubling oil coming out of the tank vent, it's because the checkvalves are stuck. i'm talking about the small spring and ball type in the pump housing that you can't get at as they are permenantly assembled. you need to get them unstuck. try as i posted using the red piston/spring. you need to be pretty vigorus moving that piston in/out until they free up. you don't have the pump cleaned perfectly until it pumps oil. after that it'll take about a minute or 2 until you get bar oil to the bar.
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Offline qwerty12

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Re: McCulloch oil pump problem
« Reply #5 on: April 07, 2013, 05:15:16 pm »
Please sorry buth my english is bad...so did not quite understood you

the only walve that my pupm has is a small metal ball inside a metal tube that I have marked here:


I cleaned that to. Disabled pump...blowed with air that metal tube. cleaned the ball and spring. and returned it back to the saw. still no oil

Offline brokenbudget

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Re: McCulloch oil pump problem
« Reply #6 on: April 07, 2013, 05:34:17 pm »
thats not it. there is 2 internal checkvalves built into the body of the pump housing.
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Offline 660magnum

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Re: McCulloch oil pump problem
« Reply #7 on: April 07, 2013, 05:41:47 pm »
I don't know if I helped of not? This is in
Slovenian

so majhne preverite ventili na ohišju črpalke, so še vedno zaljubljen. če ste videli "pritisk", ali bubling olje prihaja iz rezervoarja vent, je to zato, ker so obtičali v checkvalves. Govorim o malih črkah spomladi in žogo v ohišju črpalke, da ne morete priti v kolikor so permenantly sestavljeno. jih morate dobiti odlijepio. poskusite kot sem objavil z rdečo bat / pomlad. morate biti lepa vigorus gibljivi, da je bat in / out, dokler ne sprostite. nimate črpalka očiščena odlično, dokler se ne črpa olje. Po tem bo trajalo približno minuto ali 2, dokler ne prideš bar olja v bar.

Slovak

malí spätné ventily v telese čerpadla sú stále uväznení. ak ste videl "tlak", alebo bubling olej vychádzajúci z nádrže otvor, je to preto, že checkvalves sú prilepené. Hovorím o malé jarné a guľôčkového typu v telese čerpadla, ktoré nemôžete dostať na ako oni sú permenantly zmontované. musíte si ich rozlepený. sa snažil, ako som vyslaný pomocou červeného piestu / pružinu. musíte byť pekný vigorus pohybujúce sa, že piest in / out, kým sa uvoľniť. nemáte čerpadlo vyčistiť perfektne, kým čerpadla oleja. potom, čo to bude trvať o minútu alebo 2, kým sa nedostanete bar olej do baru.

Serbian

мале неповратних вентила у кућишту пумпе су увек заглављени. ако сте видели 'притисак', или бублинг уље излази из резервоара вентилацију, то је зато што су цхецквалвес заглављен. Ја говорим о малом пролећа и лопта типа у кућишту пумпе да не можете добити на што су перменантли монтирана. морате да их одлепио. покушајте што сам постављен користећи црвену клип / гибањ. треба да буду привлачне вигорус покретни тај клип ин / оут док не до ослободити. немате пумпа очишћена савршено док не пумпе уља. након тога ћу узети око минут или 2 док не добијете бар уље на траци.
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Offline 660magnum

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Re: McCulloch oil pump problem
« Reply #8 on: April 07, 2013, 05:44:08 pm »
Serbian

то није то. постоји 2 унутрашња провера вентила уграђени у тело кућишта пумпе.

Slovak

že to nie je ono. je 2 vnútorné spätné ventily vstavané do tela skrine čerpadla.

Slovenian

to ni to. je 2 notranji kontrolni ventili vgrajeni v telo ohišja črpalke.
We should share what we know... someone may learn...
That knowledge can live after us... and that "Pays It Forward".
Be all that you can be . . .

Offline qwerty12

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Re: McCulloch oil pump problem
« Reply #9 on: April 07, 2013, 06:08:55 pm »
@Magnum...how did you know I speak serbian ?  ;D

@Budget... please can you use your paint and with arows show me on what valves do you mean?

 

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