Jump to content

Nominations for Tractor of the Month
Garden Tractors and Parts on eBay



Photo

Replacing Crankshaft Seals


  • Please log in to reply
6 replies to this topic

#1 jrk OFFLINE  

jrk

    Member

  • Member
  • Contributor
  • Member No: 1621
  • 42 Thanks
  • 95 posts

Posted July 08, 2012 - 11:26 AM

I figured there might be a few people on here that have Kohler engines :) with leaky oil seals on their crankshaft and would like to know that this job can be done rather easily without disassembling the whole engine.

First course of business is to head over to Napa and pick up the two oil seals you will need for the flywheel and PTO end of the crankshaft. They're are about ½ the price of geniune Kohler parts.

The part numbers are:

Flywheel Seal: 7-04002
PTO Seal: 7-04003

I will caution you at this point that these numbers corresponded to the Kohler that came on my CC 129. I believe if you look on Napa's website for these number they will give you an ID and OD to verify that they will fit.

Edited by jrk, July 08, 2012 - 11:33 AM.

  • middleageddeere, bowtiebutler956 and larryd have said thanks

#2 jrk OFFLINE  

jrk

    Member

  • Member
  • Contributor
  • Member No: 1621
  • 42 Thanks
  • 95 posts

Posted July 08, 2012 - 11:26 AM

The steps I used to replace the PTO seal were as follows:
  • Thoroughly clean the crankshaft with emery cloth
  • Wipe the crankshaft off with solvent to remove metal particles / rust
  • Drill a small hole into the seal 3/4 of the way through and wipe off metal
  • Screw a drywall screw through the seal
  • Pull the seal with the help of the screws
  • Polish the sealing surface being careful not to get anything into the case
  • Clean with solvent
  • Apply Grease to the ID and OD of the seal
  • Tap Seal into case to a depth of 1/8" from the surface
The front seal you just need to take the bearing plate off and knock it out with a punch or screwdriver. Grease the seal and tap the seal in until it bottoms out on the plate.

Attached Thumbnails

  • 1.jpg
  • 2.JPG
  • 3.JPG
  • 4.JPG
  • 5.JPG
  • 6.JPG

Edited by jrk, July 08, 2012 - 11:34 AM.

  • middleageddeere, bowtiebutler956 and larryd have said thanks

#3 jrk OFFLINE  

jrk

    Member

  • Member
  • Contributor
  • Member No: 1621
  • 42 Thanks
  • 95 posts

Posted July 08, 2012 - 11:42 AM

Just a couple extra tips which I didn't add in:
  • Take the seals with you to the hardware store to select your PVC (couldnt remember the size)
  • Try to get some emery cloth as its easier to work around the crankshaft to prevent "flat spots" than sandpaper
  • Use a rag wrapped around the crank to prevent debris falling into the block after removing the seal
  • Any solvent should work but I used brake cleaner as its always on hand ;)
Also the two P/N's that I gave in the first post may have been flipped around ie the PTO may be the Flywheel end and vise versa. When I originally wrote this I said the front / rear seal which isn't very helpful ...

Anyway hope someone else can use this. All in all the cost was less than $10 to replace both seals which is a small price to pay to keep oil off your block and garage floor.

Edited by jrk, July 08, 2012 - 11:54 AM.

  • Alc, middleageddeere, bowtiebutler956 and 2 others have said thanks

#4 bowtiebutler956 OFFLINE  

bowtiebutler956
  • Senior Member
  • Contributor
  • Member No: 10021
  • 659 Thanks
  • 796 posts
  • Location: Harlingen Texas

Posted July 08, 2012 - 12:36 PM

Thats a very helpful, and informative post. Thanks :thumbs:

Matt

#5 Ryan313 OFFLINE  

Ryan313

    PK Fanatic

  • Super Moderator
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 7087
  • 3,239 Thanks
  • 5,159 posts
  • Location: Wallkill, NY

Posted July 08, 2012 - 02:22 PM

My cub engine leaked like crazy, so my dad and I took out the engine to replace those seals. We didn't take it apart either. But, the engine bearings were terrible and it ruined the seals right away again. So, now the cub has a different engine in it. Anyway, thanks for the walk through! I am sure it will help somebody out when they are :wallbanging:

#6 JDBrian OFFLINE  

JDBrian

    Super Moderator

  • Super Moderator
  • Staff
  • -GTt Supporter-
  • Contributor
  • Member No: 2507
  • 9,574 Thanks
  • 14,136 posts
  • Location: Hubley, Nova Scotia - Canada

Posted July 08, 2012 - 03:37 PM

Nice post. Very informative and clear. Does anyone have any experience with using a removal tool to get the seals out? I've been thinking of investing in one but wonder if they are worth it.

#7 middleageddeere OFFLINE  

middleageddeere

    Tacos!

  • Senior Member
  • Member No: 2033
  • 243 Thanks
  • 1,082 posts
  • Location: MI

Posted July 27, 2012 - 03:33 AM

This is great, I always assumed you had to take the whole engine apart. Thanks!




Top