Author Topic: 440/460 hybrid  (Read 899 times)

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Offline blsnelling

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Re: 440/460 hybrid
« Reply #10 on: May 06, 2014, 11:21:46 am »
The best way to slot the holes is to use a 440 gasket to mark the base of the 460 cylinder.

A little grinding will likely be needed to clear the flywheel.  It'll be obvious and easy to take care of.

Squish should be the same as on a 460 case.  The stroke is the same.  Why use a different piston?

You will need short spacers between the muffler and case.  You can use a few washers or make a couple spacers.

Hope some of that helps.

Offline jmester

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Re: 440/460 hybrid
« Reply #11 on: May 06, 2014, 10:06:17 pm »
Don't have a lathe to turn the cylinder. Just trying different things to see what works and what does not. Thanks for the heads up on the spacers needed for the muffler. That was how I did  the slots on mine was use the 440 base gasket. When you assembled yours did you use the 440 base gasket or the 460 base gasket?
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Offline jmester

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Re: 440/460 hybrid
« Reply #12 on: May 17, 2014, 10:11:59 pm »
Got my parts in just need the time to put the bearings in the case and reassemble. How hot and how long should the cases be heated to put the bearings in. Usually use a press to get them in. But it is hard on the case. Want to try a new way. Looked at Killians post on a 371/372 to heat to 200* c for 20 to 30 mins and freeze the bearings for 24 hours. Would think it would apply to stihl saws as well?
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Offline mdavlee .

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Re: 440/460 hybrid
« Reply #13 on: May 18, 2014, 05:28:42 pm »
I just heat the bearing pockets with a small torch or heat gun. A heat gun will take 5-10 minutes aimed at the bearing pocket.

Offline 660magnum

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Re: 440/460 hybrid
« Reply #14 on: May 18, 2014, 07:56:25 pm »
+1 on the heat gun
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Offline jmester

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Re: 440/460 hybrid
« Reply #15 on: May 19, 2014, 07:40:09 am »
If there is some paint missing in the bottom of the crankcase. Do you guts repaint those areas or just leave them alone? My thought was that the paint helps to seal the pores in the magnesium.
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Offline brokenbudget

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Re: 440/460 hybrid
« Reply #16 on: May 19, 2014, 07:47:55 am »
I usually take the rest off and leave it bare
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Offline jmester

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Re: 440/460 hybrid
« Reply #17 on: May 19, 2014, 08:32:55 am »
Thanks.
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Offline KilliansRedLeo

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Re: 440/460 hybrid
« Reply #18 on: May 19, 2014, 09:29:52 am »
I have a 'garage sale' toaster oven large enough to fit one pair of cases that I use. Husqvarna does not say how long to heat cases only to heat them in an oven to 200C. The 20-30 minutes that I use is because the toaster oven is not as well insulated as my wife's Viking range which she won't let me use!

When I get a case like a 3120XP which won't fit in the toaster oven, I use a heat gun.

As far as the paint goes, I also remove it. As long as the saw is in service there is little chance of 'white death' inside the cases because they are coated with oil.

When using an over you must remove all rubber/plastic parts from the case and all chainsaw goo to prevent ruining parts or starting a fire.
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Offline jmester

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Re: 440/460 hybrid
« Reply #19 on: May 19, 2014, 09:05:43 pm »
Got them in there used my propane plumbers torch. Works like a champ. Easy to tell when you have the cases hot enough the bearings almost fall out.  Thanks for the tips and help. Got the cases back together. Need to get the special tool to drive the flywheel side crank seals in. Then comes the fun clean the rest of the parts and reassemble.
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