Author |
Message |
DN Samba Member
Joined: February 17, 2006 Posts: 111 Location: Earth
|
Posted: Sun Nov 04, 2007 3:55 pm Post subject: Newbie Ignortant Question |
|
|
I feel like a complete moron but I need someone to help me . I am building my first engine and am assembling the rotating assembly first so I can send it out to be balanced. My question is this:
What do you use to hold the crank while torquing the rod bolts?????
I'm assuming this is just so bloody simple its crazy 'cuz everyone has to do this. I have no one around me so you guys are my only hope!(John Muir's manual says to have a friend hold the crank)
Thanks!!!!!!
DN _________________ Illegitimum non carborundum |
|
Back to top |
|
|
Eaallred Samba Member
Joined: May 18, 2003 Posts: 5756 Location: West Valley City, Utah
|
Posted: Sun Nov 04, 2007 4:14 pm Post subject: |
|
|
You can weld a gland nut to a piece of angle iron so that you have something you can hold in the vice while you work on the crank.
I always just set the crank in the flywheel on the bench and it holds it just fine. _________________ Eric Allred
You have to remember something: Everybody pities the weak; Jealousy you have to earn. |
|
Back to top |
|
|
bugninva Samba Member
Joined: December 14, 2004 Posts: 8858 Location: sound it out.
|
Posted: Sun Nov 04, 2007 4:16 pm Post subject: |
|
|
Eaallred wrote: |
I always just set the crank in the flywheel on the bench and it holds it just fine. |
i do the same... _________________
[email protected] wrote: |
With a show of hands, who has built over 1000 engines in the last 25 years? Anyone? |
GEX has. Just sayin |
|
Back to top |
|
|
Eric_S Samba Member
Joined: August 12, 2007 Posts: 862 Location: Sparks (think Reno) NV
|
Posted: Sun Nov 04, 2007 4:18 pm Post subject: |
|
|
If you don't have an engine stand, loosely bolt the flywheel onto the crank ant stand it on end on the flywheel. I welded an old gland nut onto a piece of pipe that goes into my engine stand.
BTW: Don't assemble anything but the crank, gear, spacer and slinger when sending it out. Balancing is done component by component - individually pistons (I don't send the rings), rods (no bearings), crank assembly (crank, gear, spacer and slinger), flywheel and gland nut), pressure plate (and bolts) and pulley (with bolt). They will bolt whatever together if they need to.
This is a lot of on and off with the gear so you can get the #3 bearing on and off. I just leave the #3 bearing off during preliminary mock-ups until the final mock=up to be sure all spins freely. Then I use a fresh set of bearings for the build. Be sure to mark (scratch or dimple, ink wipes off) the gear and spacer so you get them back on the same way. _________________ --
Eric_S
What are all these extra parts? |
|
Back to top |
|
|
DN Samba Member
Joined: February 17, 2006 Posts: 111 Location: Earth
|
Posted: Sun Nov 04, 2007 5:40 pm Post subject: |
|
|
Eaallred wrote: |
I always just set the crank in the flywheel on the bench and it holds it just fine. |
That figures! I'm trying to figure it out in my head before I do anything and the answer is so simple!! Nothing beats experience
Eric_S wrote: |
BTW: Don't assemble anything but the crank, gear, spacer and slinger when sending it out. Balancing is done component by component - individually pistons (I don't send the rings), rods (no bearings), crank assembly (crank, gear, spacer and slinger), flywheel and gland nut), pressure plate (and bolts) and pulley (with bolt). They will bolt whatever together if they need to. |
Thats great!! So whats the difference between "static" and "dynamic" balancing? I had in my head that "static" was just individual weights, whereas "dynamic" was the combined weights put into motion.(there by seeing which components weights balanced out others)
Thanks so much guys!!!! _________________ Illegitimum non carborundum |
|
Back to top |
|
|
Eric_S Samba Member
Joined: August 12, 2007 Posts: 862 Location: Sparks (think Reno) NV
|
Posted: Sun Nov 04, 2007 6:20 pm Post subject: |
|
|
You are correct about the balance. Static means not changing (not moving), dynamic means changing (moving).
Generally, the rotating (crank assembly) parts are dynamically balanced while reciprocating parts (rods, pistons) are statically balanced.
BTW: The only ignorant question is the one that doesn't get asked. _________________ --
Eric_S
What are all these extra parts? |
|
Back to top |
|
|
DN Samba Member
Joined: February 17, 2006 Posts: 111 Location: Earth
|
Posted: Sun Nov 04, 2007 6:52 pm Post subject: |
|
|
that makes sense, thanks for explaining it!! _________________ Illegitimum non carborundum |
|
Back to top |
|
|
Nater Samba Member
Joined: June 19, 2006 Posts: 493
|
Posted: Sun Nov 04, 2007 7:23 pm Post subject: |
|
|
Eric_S wrote: |
If you don't have an engine stand, loosely bolt the flywheel onto the crank ant stand it on end on the flywheel. I welded an old gland nut onto a piece of pipe that goes into my engine stand.
BTW: Don't assemble anything but the crank, gear, spacer and slinger when sending it out. Balancing is done component by component - individually pistons (I don't send the rings), rods (no bearings), crank assembly (crank, gear, spacer and slinger), flywheel and gland nut), pressure plate (and bolts) and pulley (with bolt). They will bolt whatever together if they need to.
This is a lot of on and off with the gear so you can get the #3 bearing on and off. I just leave the #3 bearing off during preliminary mock-ups until the final mock=up to be sure all spins freely. Then I use a fresh set of bearings for the build. Be sure to mark (scratch or dimple, ink wipes off) the gear and spacer so you get them back on the same way. |
See, people do read these posts |
|
Back to top |
|
|
Kman07 Samba Secret Service
Joined: August 29, 2007 Posts: 413 Location: Campbell River, The great north...of the border
|
Posted: Sun Nov 04, 2007 7:25 pm Post subject: |
|
|
I don't..Im too lazy _________________ | My 1969 Rebuild | My Pictures |-VVWC- |
layinrocker67 wrote: |
does anyone one this site ever help anyone or do you all just talk shit |
|
|
Back to top |
|
|
jeff denham Samba Member
Joined: January 14, 2006 Posts: 780 Location: calif
|
Posted: Sun Nov 04, 2007 9:03 pm Post subject: |
|
|
always remember cap and long end bearing tangs DOWN. JD. |
|
Back to top |
|
|
|