Jump to content
therealdatsunnazi

Fulcrum pin

Recommended Posts

I got a pair of fulcrum pins off fleabay out of Singapore and was lucky enough to fine the lock pins from a member here. 

Share this post


Link to post

We need Mike Klotz to make some cotter bolts I need 4 of them.  The fulcrum pins you can contact the Mexican ebay seller I think it is Kentigo.  He might have some.  He stands behind his parts a buddy of mine purchased a 521 fuel sending unit that was bad and Kentigo sent him another no charge.

Share this post


Link to post

would be nice to have some more made, what is the actual job of the cotter bolt ? is it to keep the pin from spinning during tightening ? cause it seems like when you tighten down the two caps things there is no way to have side to side movement ? and maybe a safety feature if those come loose it does not move ? 

 

nissan does have a couple more of the seals for the upper arms for the kingpin trucks if anyone needs those, and looks like the lower seals are nla 

Share this post


Link to post

I know what a cotter pin is. :)

What are "cotter bolts"?

 

We need Mike Klotz to make some cotter bolts I need 4 of them.  The fulcrum pins you can contact the Mexican ebay seller I think it is Kentigo.  He might have some.  He stands behind his parts a buddy of mine purchased a 521 fuel sending unit that was bad and Kentigo sent him another no charge.

Share this post


Link to post

These are Cotter Bolts used to hold in King Pins and Fulcrum Pins.

 

$_12.JPG

Share this post


Link to post

OK, I guess I never really thought about what them were called before, I guess I thought of them as a pin, but they are a bolt of sorts.

The 320 ones are smaller than the rest of them, I go to great lengths to remove them in good condition, which is not easy.

 

These are Cotter Bolts used to hold in King Pins and Fulcrum Pins.

 

$_12.JPG

  • Like 1

Share this post


Link to post

Wayno, I thought when your truck needed any kind of suspension/steering work you just rolled a 720 chassis under them!  LOL

Share this post


Link to post

This is true :lol:

Wayno, I thought when your truck needed any kind of suspension/steering work you just rolled a 720 chassis under them!  LOL

My 521 work truck is the only truck with a 521 frame, it's highly modified, but it is a 521 frame.

 

BTW, I have only done one kingpin R&R, I now have Mike Klotz do them when I buy a set of drop arms/disc brake brackets from him, it's really hard to do them when all you have is hammers and a vise.

  • Like 1

Share this post


Link to post

These are Cotter Bolts used to hold in King Pins and Fulcrum Pins.

 

$_12.JPG

 

Charlie... I would have to call those cotter pins. A cotter, is a pin or a wedge used to secure parts together. A cotter bolt would have some sore of head to turn it or secure it so it won't turn while tightening the nut. There would be a hole through the threads for a cotter pin to fit.

  • Like 1

Share this post


Link to post

Just calling them as the parts manual does.  Also doesn't the threaded portion for the nut lean the name towards a bolt instead of a pin?

 

Part # 40023-30000

Share this post


Link to post

This is the name used in the Nissan/Datsun Parts Manual.  Part #  40023-30000.

 

Mike Is there a superseded parts number for these?  That part # comes up bad at Nissan Parts Zone.

Share this post


Link to post

I asked Mike Klotz about making them and he referred me to Benjamin who had a machine shop make them in the past.

 

I PM'd Benjamin so we will wait and see.  If not maybe Mike will come through.

  • Like 1

Share this post


Link to post

I asked Mike about making them and he referred me to Benjamin who had a machine shop make them in the past.

 

I PM'd Benjamin so we will wait and see.  If not maybe mike will come through.

are you talking the cotter bolt or the fulcrum pin ? or both ? 

Share this post


Link to post

Just calling them as the parts manual does.  Also doesn't the threaded portion for the nut lean the name towards a bolt instead of a pin?

 

Part # 40023-30000

 

My parts calls it Pin Cotter, Fulcrum Pin

 

This is the name used in the Nissan/Datsun Parts Manual.  Part #  40023-30000.

 

Mike Is there a superseded parts number for these?  That part # comes up bad at Nissan Parts Zone.

 

Pt. # 40023-30000 is only used on the J13 and L16 520 and 521 and appears to not be superseded nor used in any other application. The 620 'pin' is 40023-B5000. Unknown if it will work... doubtful.

Share this post


Link to post

In US vernacular, a cotter pin is the small wire pin, like you find securing a castle nut.  Cotter bolt makes more sense for the above, since it's not a cotter pin in the normal sense in the US.  Sorry Canada.

Share this post


Link to post

Mike obviously Canadian Manuals are translated differently than the USA Manuals  as all manuals back in the day were originally written in Japanese and then translated to the language of the Country they went to..  Is your library perhaps in French Canadian?

 

Mike it does not matter what it is called because we can not buy them any more . If I am successful at get some made I thinking of calling them "Charlie's Wedgette."

 

This is the manual that I took the wording from.

 

521FSMCover.jpg

Share this post


Link to post

The 73 620 FSM calls the same part in the same location a 'cotter pin retaining fulcrum pin'. A rose by any other name... Maybe Charlie's Wedgie.

 

Until yesterday I had never heard of a cotter bolt.. had to look it up.

Share this post


Link to post

I find it funny (ha ha) how the part names evolve in time.  Mike please do not misunderstand me I appreciate all of your input.  You have educated me on many Datsun differences.

Share this post


Link to post

I've noticed on more than one occasion the cotter pin doesn't tighten down all the way in the hole and make full contact with the king pin. You can test this by sticking the bare king pin and tightening the cotter bolt down most of the way not all of the way and you'll see the the cotter pin is snug but the king pin moves around a little.

 

I sand/dremel my cotter pins a bit for this reason.

  • Like 1

Share this post


Link to post

I seem to be the only one who has ever noticed this or mentioned it so I really want the word to get out.

 

Test fit. king pin wobbles around.

100_5109.jpg

 

After some dremeling. King pin is now nice and snug.

100_5110.jpg

 

100_5106.jpg

  • Like 2

Share this post


Link to post

Also there is some debate on putting the bearing on the top or bottom. I put mine on the bottom. Either or test fit first then put the bearing in last tapping it in gently so you have a nice tight fit all around.100_5115.jpg

  • Like 2

Share this post


Link to post

According to the diagram I looked at, on the 64 suspension, the bearing is supposed to be on the bottom.

That is the way Mike put them on the assemblies I bought from him also.

I suppose that one could get another quarter/half inch drop by putting it on the top.

  • Like 1

Share this post


Link to post

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×

Important Information

By using this site, you agree to our Terms of Use.