« previous next »
Pages: [1]   Go Down

Author Topic: Crank Seals  (Read 2174 times)

0 Members and 41 Guests are viewing this topic.

Offline

  • 5 cube
  • ***
  • Posts: 141
  • Karma: 17

    • Total Badges: 26
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Level 5
Crank Seals
« on: January 25, 2014, 07:57:47 am »
Are some engine/ body   parts becoming obsolete for the 3700/3.7 cuz it seems like the C/S's are a no go or is there a cross over seal available?
Logged

Share on Bluesky Share on Facebook

Offline

  • 6 cube
  • ****
  • Posts: 205
  • Karma: 66
  • Location: Brampton, Ontario

    • Total Badges: 28
    Badges: (View All)
    Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary
Re: Crank Seals
« Reply #1 on: January 25, 2014, 09:01:47 am »
Yep.
For 3400, 3700 & 4000. All the same case and crank.
Any of these the following work great.

National 253747
SKF 6119
SKF 6120 single lip 
Logged
Tim

Offline

  • 5 cube
  • ***
  • Posts: 141
  • Karma: 17

    • Total Badges: 26
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Level 5
Re: Crank Seals
« Reply #2 on: January 25, 2014, 09:50:18 am »
Fossil, A big Thank You on the lip seals #s ;)
Logged

Offline

  • 6 cube
  • ****
  • Posts: 205
  • Karma: 66
  • Location: Brampton, Ontario

    • Total Badges: 28
    Badges: (View All)
    Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary
Re: Crank Seals
« Reply #3 on: January 25, 2014, 04:55:21 pm »
You're most welcome. Just a tip on the install,
On the clutch side there is a 90 deg step that the seal must go over and it is very easy to damage the seal going over this step. There are lots of different home made tools but I take a piece of 1/2" copper plumbing pipe and cut one end with a hacksaw and the other with a tubing cutter.
Clean off all burrs and put the saw cut end against the step on the crankshaft and slide the seal over the tube cut end which is curled down. If you don't have a tubing cutter you can sand a chamfer on that end.
The seal can go on the pipe before you place it on the the crank. don't forget to grease the tube.
This will allow the seal to ride right over the step with no damage.
Logged
Tim

Offline

  • 6 cube
  • ****
  • Posts: 205
  • Karma: 66
  • Location: Brampton, Ontario

    • Total Badges: 28
    Badges: (View All)
    Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary
Re: Crank Seals
« Reply #4 on: January 25, 2014, 05:10:04 pm »
Ripper,

If you want a repair manual for your 3700, PM me your e-mail address and I will send you one.
I don't think I can upload it on the forum as it's 4.7MB
Logged
Tim

Offline

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4709
  • Karma: 320
  • Location: Carpenter, Wyoming

    • Total Badges: 43
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Level 7 Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary
Re: Crank Seals
« Reply #5 on: January 25, 2014, 07:22:11 pm »
Quote from: fossil on January 25, 2014, 04:55:21 pm
You're most welcome. Just a tip on the install,
On the clutch side there is a 90 deg step that the seal must go over and it is very easy to damage the seal going over this step. There are lots of different home made tools but I take a piece of 1/2" copper plumbing pipe and cut one end with a hacksaw and the other with a tubing cutter.
Clean off all burrs and put the saw cut end against the step on the crankshaft and slide the seal over the tube cut end which is curled down. If you don't have a tubing cutter you can sand a chamfer on that end.
The seal can go on the pipe before you place it on the the crank. don't forget to grease the tube.
This will allow the seal to ride right over the step with no damage.

One of the other methods that I have used is piece from a aluminum soda can.    Good info there Tim.
Logged
PP 505, 475, 445.

Offline

  • 6 cube
  • ****
  • Posts: 205
  • Karma: 66
  • Location: Brampton, Ontario

    • Total Badges: 28
    Badges: (View All)
    Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary Fourth year Anniversary
Re: Crank Seals
« Reply #6 on: January 25, 2014, 08:36:16 pm »
Some saw mechanic I am Roger. Changing cases on a Craftman 3.4 today. I spun the clutch off with a small butterfly impact. The result was much like running one with the clutch cover off. Still looking for one of the clutch shoes. At least it's in the basement.  :o
Logged
Tim

Offline

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 4709
  • Karma: 320
  • Location: Carpenter, Wyoming

    • Total Badges: 43
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Level 7 Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary
Re: Crank Seals
« Reply #7 on: January 25, 2014, 09:34:41 pm »
Quote from: fossil on January 25, 2014, 08:36:16 pm
Some saw mechanic I am Roger. Changing cases on a Craftman 3.4 today. I spun the clutch off with a small butterfly impact. The result was much like running one with the clutch cover off. Still looking for one of the clutch shoes. At least it's in the basement.  :o

Impacts I think are the way to go for that job but you do have to be careful and do not become over zealous.   I usually just do short bursts.
Logged
PP 505, 475, 445.

Offline

  • Moderator
  • Nitro Hotsaw
  • *******
  • Posts: 2117
  • Karma: 217
  • Magnesium and Iron.
  • Location: Northwestern Wyoming

    • Total Badges: 37
    Badges: (View All)
    Tenth year Anniversary Nineth year Anniversary Eighth year Anniversary Seventh year Anniversary Sixth year Anniversary Fifth year Anniversary
Re: Crank Seals
« Reply #8 on: January 26, 2014, 03:18:52 am »
Yep.  And dial down that butterfly impact.    Start light and turn the power back up only as needed to bust 'er loose.
Logged
Pages: [1]   Go Up
« previous next »
 

Related Topics

  Subject / Started by Replies Last post
8 Replies
4881 Views 		Last post November 07, 2016, 05:37:38 pm
by oldpro
18 Replies
6029 Views 		Last post November 11, 2013, 09:19:48 am
by KilliansRedLeo
8 Replies
2523 Views 		Last post January 22, 2014, 11:23:10 pm
by jockeydeuce
8 Replies
4559 Views 		Last post March 03, 2014, 05:29:59 pm
by adam32
11 Replies
3353 Views 		Last post July 16, 2014, 08:03:38 pm
by bustedknuckles
9 Replies
2901 Views 		Last post April 24, 2015, 07:43:36 pm
by Cut4fun .
26 Replies
4060 Views 		Last post September 15, 2014, 12:31:50 pm
by Cut4fun
120 Replies
15869 Views 		Last post October 07, 2023, 08:09:15 am
by Cut4fun
7 Replies
13975 Views 		Last post January 07, 2025, 10:09:57 am
by Cut4fun .
1 Replies
2085 Views 		Last post August 05, 2022, 05:02:12 am
by DNX800