facebook1 youtube1 twitter1 instagram linkedin1 pinterest1

NOTICE:  If you are not a free registered member of the site, you will not see the photos in the forum, and you won't be able to access our premium member content. Please consider joining our community! REGISTER AND MAKE THIS BOX DISAPPEAR!

×

Pictures Posting Not Working (12 Jun 2023)

Picture uploads is again unavailable. We are working on the problem. Thanks for your patience.

Makotosun

Bearing puller for crankshaft

  • tlh0824
  • tlh0824's Avatar Topic Author
  • Offline
  • Premium Member
  • Premium Member
  • Posts: 98
  • Likes received: 29

Bearing puller for crankshaft was created by tlh0824

 Can anyone recommend a bearing puller so I can separate the old bearing from the crankshaft. I am on my second Amazon purchase, there is hardly and meat for a puller to grab on to.
Thank you 
 
Last edit: 19 Aug 2021 16:26 by tlh0824.
19 Aug 2021 16:25 #1

This message has attachments images.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

  • Posts: 10828
  • Likes received: 4695

Replied by RT325 on topic Bearing puller for crankshaft

I use one the same as you pictured. I just have the bolts loose & fit it over the bearing & sit one side in the vice--poor old vice-- & smack the other side with a BIG hammer & never fails to drive it off or far enough off so that its almost to where the shaft steps down a few thou to then fall of.
Would be the bigger of the two pictured i use i guess, as only have one. Looks like a useful set to have.
Last edit: 19 Aug 2021 16:48 by RT325.
19 Aug 2021 16:45 #2

Please Log in or Create an account to join the conversation.

  • tlh0824
  • tlh0824's Avatar Topic Author
  • Offline
  • Premium Member
  • Premium Member
  • Posts: 98
  • Likes received: 29

Replied by tlh0824 on topic Bearing puller for crankshaft

Ok, right now I cant get it around enough to get the bolts in. I plan to get longer bolts.

I always thought hammers and crankshafts were not friends!
19 Aug 2021 17:33 #3

Please Log in or Create an account to join the conversation.

  • Posts: 10828
  • Likes received: 4695

Replied by RT325 on topic Bearing puller for crankshaft

Ya not hammering the shaft as such, but the bearing tool. If you're using the bigger one in the pic they're pretty long bolts. I'll demo mine shortly if i can.

Had to improvise a bit as no crank handy. But imagine the bearing is on the shaft--as yours is--& there's a smidgen of gap behind the outer bearing. Then set the tool against/behind the bearing & will only just get there but taper will force its way in. Could pull it in with the bolts but really needs a short sharp jolt--shock treatment works for me. Pics i see aren't quite in order but imagine pic 6 just getting behind the edge while on the shaft, Your right side bearing i guess is still in the case which is normal as 'that side' is just a slide fit onto the crank & bolted up tight by the crank nut & gear.
Last edit: 19 Aug 2021 18:23 by RT325.
19 Aug 2021 17:50 #4

This message has attachments images.
Please log in or register to see it.

Please Log in or Create an account to join the conversation.

  • Posts: 687
  • Likes received: 454

Replied by Pedalcrazy on topic Bearing puller for crankshaft

I was schooled by several expert mechanics and machinists on the heat/freeze method of installing and removing bearings from cranks and cases. It's amazing how it works. Different thing with yours is they are both already assembled. You might put the whole assembly in your freezer for at least 24 hours. Then use a propane torch on the outside of the bearing and keep the flame off the crank. Pry a little between bearing and crank and you might be surprised. You have to get the bearing hot before the crank gets hot. With heat/freeze I've had bearings litterly fall out of the side cases.
1978 DT400E
1976 DT400C
1973 RT3
1971 RT1B
1968 DT1 (3)
The following user(s) Liked this Post: Sneezles61
19 Aug 2021 18:11 #5

Please Log in or Create an account to join the conversation.

  • Posts: 33
  • Likes received: 9

Replied by Top Jimmy on topic Bearing puller for crankshaft

Bearings like this are hard to remove in tact.  When you pull on the outer race it presses on the balls (try not to laugh) which press onto the inner race.  This causes the inner race to squeeze onto the shaft.  The more you pull, the tighter it squeezes.

My preferred method when all else fails is to remove it one piece at a time.  First step is to rip out the ball cage.  This requires a bit of brute force but its not that difficult.  Can be done with pry bars, picks, cold chisel, etc.  Once removed, move all the balls so they are on one side and you should be able to remove the outer race.  With the outer race removed, the balls just fall out.  Then you have to remove the inner race.  A Dremel tool or small die grinder with a cut off wheel is needed. Cut some slits in the inner race. At least two.  Go as deep as you can without cutting into the crankshaft.  Then a few light taps with a cold chisel should split the inner race and you are done.  If you don't have a grinder, another option is to heat the inner race and try to get it to slide off. A propane soldering torch will do the job.  

Hope this helps.  Good luck.
19 Aug 2021 19:29 #6

Please Log in or Create an account to join the conversation.

  • Posts: 14499
  • Likes received: 10716

Replied by MarkT on topic Bearing puller for crankshaft

The type RT325 has artfully demonstrated has always worked for me to remove a crank bearing stuck on crank. 

Odd that your bolts are too short...  You can also tighten the bolts which will force the wedge in behind the bearing if you don't want to use the "BFH" method.
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
19 Aug 2021 20:02 #7

Please Log in or Create an account to join the conversation.

  • Posts: 10828
  • Likes received: 4695

Replied by RT325 on topic Bearing puller for crankshaft

Tomorrow, if i can find a complete crank, i'll do a video of my brutality. Never yet broken a bearing. Can see how possibly tightening the bolts might make it hold tighter on the shaft because of how the balls are getting squashed--trying not to think about that lol--. That's why i think the shock treatment with BFH is best--for me.
19 Aug 2021 23:08 #8

Please Log in or Create an account to join the conversation.

  • Posts: 10828
  • Likes received: 4695

Replied by RT325 on topic Bearing puller for crankshaft

Here's a video of the tool being used to remove the inner race.

 
The following user(s) Liked this Post: Rick C., Bdee
19 Aug 2021 23:22 #9

Please Log in or Create an account to join the conversation.

  • Posts: 14499
  • Likes received: 10716

Replied by MarkT on topic Bearing puller for crankshaft

I often use the BFH method too... 

This image is hidden for guests.
Please log in or register to see it.



...or you can use the correct method shown in video. 

This image is hidden for guests.
Please log in or register to see it.



Bearing always comes right off with no heat or taking bearing apart.  The right tools make jobs easy and this is the right tool for this job. 
1963 YG1-T, 1965 MG1-T, Allstate 250, 1970 CT1b, 1971 R5, 1973 AT3MX, 1974 TS400L, 1975 RD350, 1976 DT175C, 1976 Husqvarna 250CR, 1981 DT175G, 1988 DT50, 1990 "Super" DT50, 1991 RT180, 2017 XT250
The following user(s) Liked this Post: Rick C.
20 Aug 2021 05:40 #10

Please Log in or Create an account to join the conversation.

Moderators: yamadminMakotosunDEETVinnieJames Hart