What is the best way to lock the crankshaft? Front main seal replacement. - Mercedes-Benz Forum

 
LinkBack Thread Tools Display Modes
post #1 of 4 (permalink) Old 06-20-2014, 02:32 AM Thread Starter
BenzWorld Member
 
Luna Gaudi's 72 250's Avatar
 
Date registered: Sep 2012
Vehicle: 1972 Mercedes Benz 250
Location: Santa Fe, NM U.S.A.
Posts: 389
Mentioned: 0 Post(s)
Quoted: 17 Post(s)
(Thread Starter)
What is the best way to lock the crankshaft? Front main seal replacement.

I need to change the leaking front main seal. I have everything out that needs to be out, except for the large bolt that goes into the crankshaft.
What is the best/proper way to lock the crankshaft from turning so that I can try to remove the that main bolt?
Luna Gaudi's 72 250 is offline  
Sponsored Links
Advertisement
 
post #2 of 4 (permalink) Old 06-20-2014, 06:30 AM
BenzWorld Veteran
 
Date registered: Aug 2009
Vehicle: '72 250C, '74 280C, '85 500SEL, '81 300CD.
Location: Tucson, Az.
Posts: 679
Mentioned: 3 Post(s)
Quoted: 51 Post(s)
Easiest way is to use an impact (air or electric) wrench.
Mike D is offline  
post #3 of 4 (permalink) Old 06-20-2014, 08:28 AM
Premium Member
 
Date registered: Nov 2012
Posts: 1,241
Mentioned: 0 Post(s)
Quoted: 59 Post(s)
Premium Member
impact wrench for out and back in , if not hold the damper with a wise grip and it will hold against the water pump housing .
agillot is offline  
post #4 of 4 (permalink) Old 06-20-2014, 03:42 PM Thread Starter
BenzWorld Member
 
Luna Gaudi's 72 250's Avatar
 
Date registered: Sep 2012
Vehicle: 1972 Mercedes Benz 250
Location: Santa Fe, NM U.S.A.
Posts: 389
Mentioned: 0 Post(s)
Quoted: 17 Post(s)
(Thread Starter)
Thanks for the suggestions. My impact wrench is a standard size one, but it
would not fit because to the air conditioning radiator. The vise grip trick did
not work either. Here is what I came up with that worked really well.

A piece of 1/2" rebar positioned under the altenator bracket and the power
steering bracket. Then a steel tent hold down spike fitted through the
existing hole on the harmonic balancer. (I bent the spike so that it would
not hit the ac radiator, it was easier to bend it then to cut it) Then a large
breaker bar and a socket and i was able to get it off.

Now I am having trouble removing the harmonic balancer. I saturated with
penetrating oil and used a pully puller, and it didn't even budge. I think I
may need a larger puller.

Any suggestions would be welcomed.
Attached Thumbnails
Click image for larger version

Name:	IMG_3476.jpg
Views:	35
Size:	62.7 KB
ID:	999601  

Last edited by Luna Gaudi's 72 250; 06-20-2014 at 04:40 PM.
Luna Gaudi's 72 250 is offline  
Sponsored Links
Advertisement
 
Reply

  Mercedes-Benz Forum > General Mercedes-Benz Forums > Vintage Mercedes-Benz

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Mercedes-Benz Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











  • Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
     
    Thread Tools
    Show Printable Version Show Printable Version
    Email this Page Email this Page
    Display Modes
    Linear Mode Linear Mode



    Posting Rules  
    You may post new threads
    You may post replies
    You may not post attachments
    You may not edit your posts

    BB code is On
    Smilies are On
    [IMG] code is On
    HTML code is Off
    Trackbacks are On
    Pingbacks are On
    Refbacks are On

     

    Title goes here

    close
    video goes here
    description goes here. Read Full Story
    For the best viewing experience please update your browser to Google Chrome