compression numbers

[theLeopard]

it's in pieces, need those pliers to remove the circle clips.
you're correct, the entire thing is filthy. if I clean the master cylinder and bleed the hoses properly will that be sufficient?
I can't find any info about the slave in the brief look I gave to my manual.

[simi_ed]

it's in pieces, need those pliers to remove the circle clips.
you're correct, the entire thing is filthy. if I clean the master cylinder and bleed the hoses properly will that be sufficient?
I can't find any info about the slave in the brief look I gave to my manual.

OK Brian, school's back in session:
It's "Circlip", or snap ring; not "circle" clip.    You need a set of "snap ring pliers" to get that bugger out.  The problem with all that shit on the bottom of your brake (and clutch!) system is: it is heavier than the brake fluid and settles to the lowest point in the system.  Either at the caliper or slave cylinder.  The slave needs to come apart.  See if the bore is rusted and/or pitted.  Pitted means its TOAST! 

Calipers are another story.  You may have noticed the discussion of Blue Dots.  Far easier solution than working on the original calipers.  What about the brake lines?  Still rubber?  They need to go!

[theLeopard]

alright i'll tear apart the slave cylinders (those are the assembled units on the calipers, yes?) but
I still need someone to walk me through bleeding the system. I can't for the life of me do it properly and the manual assumes I already know how.

[theLeopard]

figured out what gravity drip is, and they were dripping clean by the end of this service.
everything inside the slaves was orange. doing the rears tomorrow.

still need an explanation on bleeding the lines though, not really sure how it works.

productive day! thanks guys!

[simi_ed]

Slave cylinder is clutch, not Brakes! Brakes have calipers.  What rust did you remove?  Visible rust means nothing.  The rust between the piston and the bore is what matters.

Keep reading!
 

[simi_ed]

OK, here's the next thing.  Looking at the above pic, I see you've unbolted the caliper halves.  Big No-No!  Yamaha DOES NOT SELL THE O_RINGS!  You damage or lose one, or it doesn't fit for reassembly, you've toasted a caliper. 

Do you have a shop manual?  Do you ACTUALLY READ it?  You can only get lucky for so long, then something goes south.  Like the gasoline overflow from the carbs, or dumping all your oil while riding home.  If you keep doing stupid shit, you're gonna get hurt!  Stop doing stupid shit!  Read up BEFORE you start doing something.  Ask questions.

Ed

[ribbert]

Ed, I'm the first to 'dip me lid' to you for persevering with this the thread and the amount of detail you are going into but it's a bit hard coming down on him like that over terminology he is clearly not familiar with. In hydraulic terms, a caliper is a slave cylinder anyway. Not how they are commonly referred too but technically correct and certainly doesn't warrant a rebuke (I just noticed Harvy called them slaves as well).

As far as those 'O' rings between the caliper halves goes, you can get something that will do the job from any bearing service.


Leopard,
Harvy suggested new seals all round. New seals are a MUST if dismantling. Once you have removed the seals from the bores, do not reinstall them. If you do, they may not leak straight away, but they will certainly leak a lot sooner than they would have left undisturbed. It is also a waste of time putting new seals into a cylinder if the condition of the bore is sufficiently scored or otherwise damaged, and to make that call, you need to know what you are looking at.

You have unnecessarily opened up a can of worms here. If simply wanting to have brakes that work on a budget you could have either left them alone or flushed the system out in situ rather than jump the gun and pull everything apart.

Anyway, you've done it now. Just make sure you don't get fluid on the disc pads and the discs are clean.

Noel

[Burns]

Slave cylinder is clutch, not Brakes! Brakes have calipers.  What rust did you remove?  Visible rust means nothing.  The rust between the piston and the bore is what matters.

Keep reading!
 

though it is just semantics, I believe "slave cylinder" is a generic term that applies to the "receiving end" of all hydraulic systems (pressure is generated in the "master" and transmitted to the "slave"). Brake caliper assemblies include such a slave.

Pretty sure.

[simi_ed]

Agreed.  However, if you walked into a parts store with a caliper and asked for a "slave rebuild kit" or a "rebuilt slave cylinder", the parts guy (and most everyone else in the place) would look at you as if you were an idiot.  Again, I agree, technically it is a "slave cylinder", but since the youngster has ZERO KNOWLEDGE, should we at least try to educate him properly?  Or do we want to have another person that cannot describe an item using common terminology?

[Burns]

Point taken.

I usually just go to the parts place and ask "do you have one of these thingees?"

[theLeopard]

umm,, you guys are having man-talk time and I respect that but I just wanted to update everyone on current events.

1) I rebuilt all 3 brake calipers.
2) I flushed all 3 brake lines
3) I bled all 3 brake lines
4) I serviced the brake master cylinder but couldn't find a suitable tool at the local store to remove the circlips so I didn't get to rebuild that
4) I flushed clutch line
5) I serviced the clutch master cylinder, same as above
6) I did not get the chance to remove the clutch slave due to time constraints but am interested in possibly doing that next weekend

questions:
1) all my lines are kinda squishy despite not seeing any air in the lines. ride a few days and try again?
2) I spilled DOT3 all over my left-front brake-disc. problem? solution? buy a sledge?
3) when I was pumping my clutch to flush the line it kept dripping from the bottom of the oil-filter fitting. I have OEM oil/clutch parts so I presume it was leaking from the bleed screw?

will reread and try to pick up the semantics being rolled around, accurate terminology is important for both instruction and learning.

ed: yes, I read my manual but mostly its a brief skim, start the project, get stuck the reference the book. works pretty good for the most part if I don't lose anything
noel: understood. you are referring to the clutch-slave, not the brake-calipers, yes? I didn't see any gaskets for the calipers; but i'll remember to buy new rubbers any time I rebuild other OEM parts (or any parts for that matter).

[Arnie]

questions:
1) all my lines are kinda squishy despite not seeing any air in the lines. ride a few days and try again?
2) I spilled DOT3 all over my left-front brake-disc. problem? solution? buy a sledge?
3) when I was pumping my clutch to flush the line it kept dripping from the bottom of the oil-filter fitting. I have OEM oil/clutch parts so I presume it was leaking from the bleed screw?

I read my manual but mostly its a brief skim, start the project, get stuck the reference the book. works pretty good for the most part if I don't lose anything

1, If your lines are "squishy" its likely due to their age.  They should be replaced, preferably with StainlessSteel braided lines.  If you're saying your braking feels "squishy", that would be  because you haven't bled all the air out of the system.  Try again.

2. Brake fluid on your disk is a BIG problem.  Get some brake cleaner and clean the disk thoroughly.  If you've also contaminated your brake pads with fluid.... you should replace them, but you may be able to get away with just soaking them in brake cleaner for a day.  Your braking will be diminished.

3. The dripping from the oil filter housing is most likely actually from the clutch slave which is immediately above the oil filter housing.  You need to either rebuild or replace the clutch slave.
You will need a rebuild kit (at least).  RPM has them and they are inexpensive.

4. You are not (yet) at the stage to skim your manual as you do a job.  READ it before starting and then reference it as needed during that job.

Arnie

[theLeopard]

Thanks arnie, i'll start planning this weekends project.

[fredsone]

And another 2 cents 

I am guessing you have not seen anyone bleed a brake/clutch system, if this is the case then have a look on YouTube (because a picture is worth... ).
Although not necessarily FJ specific there will be good videos showing how it is done.

[mr blackstock]

To "theleopard"

Good work on getting into the Fj bug, looks like you are having an experience getting to know your bike.  While reading the manual can be a great way to start, there are also lots of online resources to help get youor head around methods or terminology.  As suggested youtube has heaps of videos on how to do things, and there are lots of websites such as this one:

http://www.dansmc.com/mc_repaircourse.htm

that have handy basics.  At the end of the day, enjoy working on your bike, you will make mistakes, just try and be sure they are cheap ones...
Correct fitting tools, patience, and heaps of rags are a great start.

Good luck
gareth