dowel pins.....

C

customride0105

Site Supporter
Location
sterling va
i bought a set of cases off of here and its been several mths ago just now getting around to putting the motor together.

went to just sit the crank in there and noticed 2 of the dowel pins a smached down into the top half of the case. its the middle 2 the smaller ones.

my question is how do i get them out... or is it ok if i just put the crank in and make sure the holes are lined up..
 
wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
What do you mean "smashed down to the top half of the case"?

Are you able to post a "good" picture?

If you are talking about a Yamaha the center pin should be slightly taller than the outer two.

Brian

customride0105 said:
i bought a set of cases off of here and its been several mths ago just now getting around to putting the motor together.

went to just sit the crank in there and noticed 2 of the dowel pins a smached down into the top half of the case. its the middle 2 the smaller ones.

my question is how do i get them out... or is it ok if i just put the crank in and make sure the holes are lined up..
Click to expand...
 
Last edited:
C

customride0105

Site Supporter
Location
sterling va
thats exctally what happended some one didnt have the outter bearings in the middle of the crank shaft lined up and they are smashed down into the cases. theres maybe a mm sticking out on one but the other one is flush.. il post some pics tonight. i was thinking if i just line the bearings up where they go and tighten it down it should be fine?

mite be able to weld to the stud and pull it out that way.
 
wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
If there is a MM sticking out, that is all that you need. All the pins do is line up the lube holes in the bearing with the case holes.

Just make sure it is lines up perfect when you reassemble them.

In my opinion, chances are very good that you will do more irrepairable damage trying to remove them. Factory pins are installed with a generous "press", on that small of a diameter, good luck getting them out.

If you can set the crank in the cases and not be able to "turn" the bearing when it is located on the pins, then in this case, it is the best you can hope for.

Brian

customride0105 said:
thats exctally what happended some one didnt have the outter bearings in the middle of the crank shaft lined up and they are smashed down into the cases. theres maybe a mm sticking out on one but the other one is flush.. il post some pics tonight. i was thinking if i just line the bearings up where they go and tighten it down it should be fine?

mite be able to weld to the stud and pull it out that way.
Click to expand...
 
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SUPERTUNE

SUPERTUNE

Race Gas Rules
Location
Clearwater Fl.
Just use 2 drops of green stud loctite creamed in the main bearing saddle.
Have cases glued and ready as you want to put the cases together as quickly as you can to not let the loctite set up.
Use a marker to pre-mark the location of the bearings so when you drop in the crank you can quickly line them up.
Bearings are NOT held in place by the pins, they are just for alignment, brearings are held in place by the line bore having .0003 to .0006 tenths smaller than the O.D. of the crank bearing.
Crankshaft bearings are a C3 rating to be able to use this crushing system.
Do this and you'll be fine...
Don't try and fix them as more than likely you'll make them worse.
 
wsuwrhr

wsuwrhr

Purveyor of the Biggest Brapp
Location
Alta Loma, working in Upland
Agreed.


SUPERTUNE said:
Use a marker to pre-mark the location of the bearings so when you drop in the crank you can quickly line them up.
Bearings are NOT held in place by the pins, they are just for alignment, brearings are held in place by the line bore having .0003 to .0006 tenths smaller than the O.D. of the crank bearing.
Crankshaft bearings are a C3 rating to be able to use this crushing system.
Do this and you'll be fine...
Don't try and fix them as more than likely you'll make them worse.
Click to expand...
 
C

customride0105

Site Supporter
Location
sterling va
SUPERTUNE said:
Just use 2 drops of green stud loctite creamed in the main bearing saddle.
Have cases glued and ready as you want to put the cases together as quickly as you can to not let the loctite set up.
Use a marker to pre-mark the location of the bearings so when you drop in the crank you can quickly line them up.
Bearings are NOT held in place by the pins, they are just for alignment, brearings are held in place by the line bore having .0003 to .0006 tenths smaller than the O.D. of the crank bearing.
Crankshaft bearings are a C3 rating to be able to use this crushing system.
Do this and you'll be fine...
Don't try and fix them as more than likely you'll make them worse.
Click to expand...

thats what i was thinking of doing puting everything in there lined upmarking the outside of the bearing where it meets the case with a marker that way i wont have to worry when i go to put the bottom half of the cases on. i know theres no way that bearing can be held in there by just a pin. but yeah simple enough.

and the pins are pressed in lol i must be one tuff cookie. i pulled the middle one out for the pics lol...
 

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