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

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Offline 660magnum

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Re: McCulloch oil pump problem
« Reply #10 on: April 07, 2013, 06:10:39 pm »
I know the general area where you live but not sure of your language
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Offline brokenbudget

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Re: McCulloch oil pump problem
« Reply #11 on: April 07, 2013, 06:45:11 pm »
 :) i'm not that good with a comp yet.
there is still a checkvalve in the pump body. it is stuck and you can't get to it without destroying the pump body. you need to soak it for a couple of days, then work at it like i said. even worn out old pumps will still pump oil. the only reason these type do not pump, is one or both of the checkvalves is stuck closed or open. the way you were describing about the 'bubbles' coming out of the tanks vent pretty much tell me the 'input' side of the pump is stuck open.

mcculloch power mac 380.
when I grow up, i wanna be an adult.

Offline 660magnum

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Re: McCulloch oil pump problem
« Reply #12 on: April 07, 2013, 06:56:05 pm »
Serbian?

и даље постоји цхецквалве у телу пумпе. се заглавио се и не можете да дођете до њега, без уништавања пумпе тело. потребно је да га потопите неколико дана, а онда радите на томе као што сам рекао. чак дотрајале старе пумпе и даље ће пумпати нафту.Једини разлог ове врсте не пумпају, један или оба цхецквалвес је заглављен затворен или отворен.начин описивали о "мехурићима" долазе из отвора резервоара прилично реци 'улаз' страна пумпе заглавио отворен.

МЦЦУЛЛОЦХ снага мац 380.
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Offline qwerty12

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Re: McCulloch oil pump problem
« Reply #13 on: April 07, 2013, 08:15:07 pm »
@Magnum thaknks for translation.

@brokenbudjet...I disabled thw whole pump and did not found other walve. I will try to soak the pump and see what it does...buth when pump is in my hands and when I moove pump piston up down it sucks oil and gets it on upper side. when i mount it on the saw it wont pump  :-\


If annybody of you folks knows where that second walve is please just go to start programs accesories ms paint and draw a circle on one of my pump pictures so I can figure out where that damn walve is

Offline brokenbudget

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Re: McCulloch oil pump problem
« Reply #14 on: April 07, 2013, 08:18:04 pm »
where did you have the adjuster screw set? could be it was in too far and not letting the piston move enough.
also, instead of the regular bar oil, try some 10/30 motor oil.
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Offline 660magnum

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Re: McCulloch oil pump problem
« Reply #15 on: April 07, 2013, 08:22:45 pm »
одакле имате подешивач вијак скуп? могло би се било у сувише далеко и не допуштајући клип креће довољно.
Такође, уместо редовног бар уљу, пробајте неке 10/30 моторно уље.
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Offline qwerty12

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Re: McCulloch oil pump problem
« Reply #16 on: April 07, 2013, 08:32:48 pm »
@Broken... adjusting screew is almost all turned off so the piston can moove as longer path is possible

Offline brokenbudget

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Re: McCulloch oil pump problem
« Reply #17 on: April 07, 2013, 09:09:43 pm »
well if you get oil when trying the pump off the saw, and everything looks fine with the pump, the only other place to look is the port that feeds the pump from the crankcase. they do become plugged with crud. you should feel pressure/vac from it when spinning the engine over. make sure the gasket is in right.
when I grow up, i wanna be an adult.

Offline qwerty12

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Re: McCulloch oil pump problem
« Reply #18 on: April 07, 2013, 09:15:49 pm »
checked that to. WHen pump was off i put some oil in that hole and pouled start calble and oil went on my face

donw know what else to check its driving me crazy


is there any way to make some homemade grunf oiling system. to attach some can on the top of the saw and to let oil naturally go to the chain?

Offline brokenbudget

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Re: McCulloch oil pump problem
« Reply #19 on: April 07, 2013, 09:27:42 pm »
when you instal the oiler, are you sure the rubber gasket is fully seated? it could be it's getting old and not sealing.
this one: http://postimg.org/image/zeu9sl5ez/

i bet whats happening is the pump is sucking air from the top of the tank, because that gasket would sort of be above the oil level and not feeding the pump. then it just pumping a small amount of oil with a whole lot of air, not making it out to the bar but blowing back into the tank.
that rubber gasket should be a tight fit between the pump housing and the tank top.
when I grow up, i wanna be an adult.

 

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