Crankshaft rebuilding

Here's where to ask questions and get answers

Crankshaft rebuilding

Postby billc » Sun Feb 24, 2019 2:29 pm

I want to rebuild my 165 motor and could use some advice/tips on the process I.E. issues specific to these motors. I'm a retired (if there is such a thing) mechanic and I've built a multitude of motors. Just finishing up a crankpin out build of a 1951 Servicar. But I ain't never been up close and personnel with this particular engine and I'm not too proud to ask for advice. I have a shop manual and read through it but I've never read a manual yet that didn't leave out the good bits. The one thing I am curious about is rebuilding the crankshaft without access to the special shop tools . Has anyone made their own or repurposed another tool ? Anybody "rigged" a tool ? What are you using Mutt ? Press plates, arbors,side plate cutter etc.
billc
 
Posts: 50
Joined: Thu Feb 14, 2019 9:06 pm

Re: Crankshaft rebuilding

Postby Mutt » Sun Feb 24, 2019 2:35 pm

I have the press plates but rarely use them. Instead of the side cutter, I use a pencil grinder with a 1/8" carbide end mill.
Mutt
 
Posts: 452
Joined: Sat Jun 02, 2018 10:11 am

Re: Crankshaft rebuilding

Postby billc » Sun Feb 24, 2019 5:22 pm

Mutt wrote:I have the press plates but rarely use them. Instead of the side cutter, I use a pencil grinder with a 1/8" carbide end mill.

what do you use instead of the press plates ? how do you set the sideplay on the rod ? do you use a hd style truing stand for final truing or a lathe ? any tricks for aligning side shafts ?
billc
 
Posts: 50
Joined: Thu Feb 14, 2019 9:06 pm

Re: Crankshaft rebuilding

Postby Mutt » Sun Feb 24, 2019 5:49 pm

1) the 2 plates that come with the press, 3/4" socket and a 2" machinist square
2) if you have a 125, the small stepped pin set's it's own end play, same goes for the 62 and later crank pin
The straight crank pin ya just press t e second flywheel on and check the end play often as you press.>015" is good
3) Rowe flywheel truing stand
4) the side shafts should be straight in their holes when they are pressed in
Mutt
 
Posts: 452
Joined: Sat Jun 02, 2018 10:11 am

Re: Crankshaft rebuilding

Postby stans48s » Sun Feb 24, 2019 6:42 pm

Here's my story. I am working on a 48 125. My rod had too much up and down play. I mean a lot. I made fixtures to press the flywheels apart. Going back together was a different story. I pushed in the pin in not straight. It doesn't take much off of true when aligning the fly wheels shafts . I gave up and sent my parts to Mutt. He got me straightened out with a different set of flywheels. Indian chief flywheels are different. The crank pin is tapered and is held to the flywheel with a nut. Can't hardly get it crooked. I thought this little 125 would be easy. Boy I was wrong. Stan
stans48s
 
Posts: 50
Joined: Thu Jan 03, 2019 1:14 am

Re: Crankshaft rebuilding

Postby billc » Sun Feb 24, 2019 7:42 pm

Sounds pretty straightforward, I'm probably overthinking this thing. What do you think of reusing that Puckett piston ? Is there any advantage to running that cut out skirt without any additional case or motor mods ?
Attachments
101_3320.JPG
101_3320.JPG (104.57 KiB) Viewed 11662 times
billc
 
Posts: 50
Joined: Thu Feb 14, 2019 9:06 pm

Re: Crankshaft rebuilding

Postby Mutt » Sun Feb 24, 2019 7:58 pm

The cut-out in the piston opens the intake sooner, letting more fuel/air mixture in
Mutt
 
Posts: 452
Joined: Sat Jun 02, 2018 10:11 am

Re: Crankshaft rebuilding

Postby billc » Sun Feb 24, 2019 8:11 pm

Mutt wrote:The cut-out in the piston opens the intake sooner, letting more fuel/air mixture in

guess i'll use it. now i need to find a cylinder i can bore .020 over to fit it. thanks :-)
billc
 
Posts: 50
Joined: Thu Feb 14, 2019 9:06 pm

Re: Crankshaft rebuilding

Postby Mutt » Mon Feb 25, 2019 8:55 am

or just cut the skirt of whatever piston ya use. Lot's easier than finding a good cylinder these days
Mutt
 
Posts: 452
Joined: Sat Jun 02, 2018 10:11 am

Re: Crankshaft rebuilding

Postby billc » Mon Feb 25, 2019 11:57 am

Mutt wrote:or just cut the skirt of whatever piston ya use. Lot's easier than finding a good cylinder these days

10-4
billc
 
Posts: 50
Joined: Thu Feb 14, 2019 9:06 pm


Return to HELP with Restoration and Running

Who is online

Users browsing this forum: No registered users and 27 guests