Jump to content

brake bleeding procedure


oukippy

Recommended Posts

Hello,

 

I've replaced many parts of my front drums (wheel cylinder, brake shoes, springs) because the left cylinder was dead.

I've made a  purge but it doesn't seem to be enough because we only purged the front brakes. I tried to drive a little bit, the pedal course is not good, similar to the clutch pedal...

 

I want to know the correct procedure for a complete purge.

My car was manufactured in 11/76 so I believe it's the 77 FSM that I must follow :

 

Master cylinder front

master rear

NLSV front

front wheels

rear wheels (left one first)

nlsv rear

nlsv center

 

Do you confirm ?

 

additional question: is it better to replace the whole brake fluid ? I've put DOT4 but I don't know what was in it before (probably dot 3).

I was thinking about pumping the fluid from the master cylinder to same time but I don't know if it's a good idea.

 

Thank you,

 

ouki

Link to post
  • Replies 16
  • Created
  • Last Reply

Top Posters In This Topic

Top Posters In This Topic

3 hours ago, oukippy said:

 

Master cylinder front

master rear

NLSV front

front wheels

rear wheels (left one first)

nlsv rear

nlsv center

 

 

 

This is the procedure for the '78 truck (per the '78 FSM) with disc brakes on the front. I don't see why it would be different from an all drum truck like the '77

Link to post

Hello,

Back to my brake problem. I had a leak on  the front left flexible because of a bad copper ring. Now it's fixed and brakes are better.

Unfortunately, I wasn't able to do the whole bleeding process because the right rear bleeder is out of order. Is it possible to buy only the bleeder or do I need to change the whole wheel cylinder ?

 

1581762424-rear-right.jpg

 

I saw that rockauto are selling rear wheelcylinder but I'm not sure if it's sold with the bleeder included:

https://www.rockauto.com/en/catalog/nissan,1977,620+pickup,2.0l+l4,1210138,brake+&+wheel+hub,wheel+cylinder,1952

 

 

Edited by oukippy
picture
Link to post

Is that bleeder broken off as it looks like it is?

If it is broken off you will likely need to remove that bleeder housing that is held on by the bolt going into the brake cylinder, I don't know if you can buy one new, but either you get that bleeder out of it or you find another one, and your going to have to get your brake line off of it before you can remove it.

Where you are located makes this a lot harder to deal with, are your brakes spongy/soft?

 

Link to post
3 hours ago, wayno said:

Is that bleeder broken off as it looks like it is?

If it is broken off you will likely need to remove that bleeder housing that is held on by the bolt going into the brake cylinder, I don't know if you can buy one new, but either you get that bleeder out of it or you find another one, and your going to have to get your brake line off of it before you can remove it.

Where you are located makes this a lot harder to deal with, are your brakes spongy/soft?

 

 

A little bit soft but brakes shoes, wheel cylinders and springs are totally new in front so I think it's normal .

It seems broken but not leaking brake fluid fortunately.

I think I'll need to replace the whole wheel cylinder, it will be easier. Consequently I'll change the brake shoes too...

Link to post

Do the brake cylinders come with them "Y" pieces?

 

This is the part you need as your brake bleeder needs to be replaced so you can bleed the rear brakes, the problem is of you remove yours and cannot get whats left of the bleeder out then it becomes a problem, you can sorta bled the brakes with that bolt but I am not sure how well that will work, you need to have an extra in case yours is too far gone as it looks sorta ugly.

001.jpg

 

I expect the one in the photo above is from a Datsun 521 which is SAE, your 620 is metric, you need to find a metric one so your brake line will fit it.

Link to post

That is what you need in the photo, they are showing it as an assembly so I hope you will get everything you see, but it has to be for a 620 as they have metric brake line fittings.

 

 

4 hours ago, oukippy said:

 rockauto doesn't fully describe the product but if they deliver what is shown on the picture, it should include the Y part.

 

https://www.rockauto.com/en/moreinfo.php?pk=484186&cc=1210138&jsn=11

 

Edited by wayno
Link to post
8 hours ago, bilzbobaggins said:

If you do not get a Y pipe, there is a 620 one on or in my tool box somewhere.  Pm if needed.  Oh shit, you are in france.  That could get expensive.  I hope you get it from rock.

 

Thank you very much for the offer. I'll buy the rockauto ones. I think it's WYSIWYG.

If it's not the case I'll let you know. By th eway Rockauto is asking $15 for the shipping by Fedex. USPS is less then $10 usually but I don't have the choice each time.

Edited by oukippy
Link to post

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
×
×
  • Create New...

Important Information

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