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Author Topic: MAC 740 melted plastic  (Read 1224 times)

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Offline Juanito

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MAC 740 melted plastic
« on: September 07, 2014, 08:25:19 am »
We bought a new MAC 740 two years ago. Last time we were using it, the chain stopped turning and we noticed that the guide tip was damaged and the tip wheel stuck. Everything was very hot and after we removed the clutch cover we noticed that something has melted and filled the bar oil holes with plastic. I bought a new guide and tried again. It seems that the oil pump is running but the oil is not getting into the guide.
Anyone had something like that happened?
I bought an Husqvarna 562XP after that but If it is possible I would like to repair the Mcculloch. I just bought 2 guides and 2 sprocket drums and it is a good size saw for small work!
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Offline Cut4fun .

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Re: MAC 740 melted plastic
« Reply #1 on: September 07, 2014, 08:32:57 am »
Just looking for info on model and saving.  Reminds me of a newer poulan.

McCulloch 740 Mac 7-40 IPL http://www.mcculloch.com/ddoc/MCCI/MCCI2011_AAaa/MCCI2011_AAaa__545014350.pdf

http://www.mcculloch.com/int/x-ref/chainsaws/mcculloch/mac-740/

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Offline Juanito

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Re: MAC 740 melted plastic
« Reply #2 on: September 07, 2014, 09:41:07 am »
Yes that one. The plastic came between the holes of the Plate-bar #40
Thank you for looking at it!
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Offline Cut4fun .

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Re: MAC 740 melted plastic
« Reply #3 on: September 07, 2014, 09:55:13 am »
Chain brake stuck on and melted around the band area?
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Offline Juanito

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Re: MAC 740 melted plastic
« Reply #4 on: September 07, 2014, 10:09:27 am »
Or the plastic under the plate-bar as the guide is sitting on it and it became very hot?
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Offline Cut4fun .

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Re: MAC 740 melted plastic
« Reply #5 on: September 07, 2014, 10:34:34 am »
Could be. Look for areas of missing plastic that has become brittle and missing yet?
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Offline mcbob

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Re: MAC 740 melted plastic
« Reply #6 on: September 07, 2014, 08:32:33 pm »
Another quality Husqvarna product   :D :D :D
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Offline Juanito

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Re: MAC 740 melted plastic
« Reply #7 on: September 08, 2014, 01:58:24 am »
Mcculloch is not for sure a good quality product and not a good image for other Husqvarna products!
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Offline Randy Mac

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Re: MAC 740 melted plastic
« Reply #8 on: September 08, 2014, 09:14:26 pm »
You shouldn't compare the new "macs" with the real McCullochs. The original 740 is 6 cubes and 95% metal.
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Offline pete

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Re: MAC 740 melted plastic
« Reply #9 on: September 09, 2014, 08:03:33 am »
There is also the italian made 740 a californian also no where as big as the original but still has a lot of metal
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