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Old 05-15-2014, 10:56 AM
Shammi Shammi is offline
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Crankshaft bolt tightening - how do I do it?

Folks:
I have a Husqvarna iZ6123 61" Z-turn mower. I recently installed a new engine. The spec for the bolt that holds the PTO pulley calls for 50 ft-lbs of torque. Question: The crank starts to move before I reach that value. How do I safely hold the crank in position while I apply torque?

Related question: How do you apply torque on the blade bolts if the mower is raised? I have been using the back-breaking and unreliable method of using wood blocks to block to stop the blades with the mower on asphalt.

I would prefer not to buy a special mower lift, but use jack stands. What is the correct way to lift a mower deck about 2' off the ground so I can use an air tool to loosen the blade bolts?

Thanks
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Old 05-15-2014, 12:08 PM
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Restrorob Restrorob is offline
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Read this post on tightening the crank bolt; http://www.lawnsite.com/showpost.php...78&postcount=2


A floor jack should get you plenty high enough to use a impact wrench......
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Old 05-15-2014, 07:47 PM
Shammi Shammi is offline
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Quote:
Originally Posted by Restrorob View Post
Read this post on tightening the crank bolt; http://www.lawnsite.com/showpost.php...78&postcount=2


A floor jack should get you plenty high enough to use a impact wrench......
How does one tell when the piston is up to TDC compression stroke without opening valve cover?
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Old 05-15-2014, 08:37 PM
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Restrorob Restrorob is offline
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If it's a twin cylinder remove one spark plug, Rotate the engine by hand until you feel it getting harder to rotate. This is the beginning of compression stroke (piston is on the way up to TDC), Then remove the remaining plug and stick a small screwdriver into the plug hole.

Rotate slowly until the piston pushes the screwdriver up out of the hole, Once you hit TDC the screwdriver will start going back down. That's known as after TDC......
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Old 05-15-2014, 10:13 PM
Shammi Shammi is offline
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Quote:
Originally Posted by Restrorob View Post
If it's a twin cylinder remove one spark plug, Rotate the engine by hand until you feel it getting harder to rotate. This is the beginning of compression stroke (piston is on the way up to TDC), Then remove the remaining plug and stick a small screwdriver into the plug hole.

Rotate slowly until the piston pushes the screwdriver up out of the hole, Once you hit TDC the screwdriver will start going back down. That's known as after TDC......
So, then you turn the crank backwards so that you return the piston with screw driver to just before TDC and insert recoil rope in it?
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Old 05-15-2014, 10:50 PM
windflower windflower is offline
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I use a chain to keep the blades from turning. Hook or wrap around the end of a blade and attach the other end to anything on the deck that is convinent.
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Old 05-16-2014, 06:37 AM
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Quote:
Originally Posted by Shammi View Post
So, then you turn the crank backwards so that you return the piston with screw driver to just before TDC and insert recoil rope in it?

^^^^^^^ That would be to loosen the bolt, Rotate past TDC and insert the rope to tighten the bolt.......
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  #8  
Old 05-16-2014, 06:50 AM
Shammi Shammi is offline
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Originally Posted by Restrorob View Post
^^^^^^^ That would be to loosen the bolt, Rotate past TDC and insert the rope to tighten the bolt.......
But, once past the TDC wouldn't the piston want to withdraw down the cylinder?
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Old 05-16-2014, 12:03 PM
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Don't try to understand, Just do as I say......
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