Brake Master Cylinder

[Bloomer]

Have read many threads on brakes here but none that provide details on how to replace master cylinder or difficulty level. Anyone that can offer an opinion on difficulty or special steps that need to be considered?

Just looking at it, it seems pretty straight forward but looking for input on anything that's not obvious before I start.

Thanks.

 

[ton504]

Extremely easy. Average Joe might take less than an hour. Add extra 10 mins if rebuild/replacing pistons. Use a 10mm flare wrench for the lines.

 

[DARKNESS]

It's really easy if you can bleed brakes. Disconnect the 4 nuts holding it on. Disconnect the 2 fittings using a flare wrench (not a normal wrench or you'll strip them). Disconnect the level sensor connector. Pull the MC off.

You want to bench bleed the new MC before replacing. You can get a bench bleeding kit at any auto parts store. You just use two fittings in the holes in the MC and attach hoses, put the hoses in the MC reservoir, fill the reservoir with brake fluid, push the plunger several times to cycle fluid through the MC to get rid of the air.

Now install the new MC the same way you took it off. Finally bleed the brakes.

 

[DARKNESS]

I'd recommend getting a new MC from Advics. They are Aisins and identica to the Toyota ones as far as I can see.

 

[Bloomer]

I've only had this 80 series a few months and it has an AISIN master cylinder already installed. PO did not replace it but also did not have the land cruiser very long. So, no idea how old this particular master cylinder is. I've heard the AISIN products are good, but a little skeptical since that's currently what's installed. I'll probably price an AISIN (since they do get good reviews) and an OEM and make a decision based on price. If OEM is not much more, I may just go with it.....

Thanks for the input thus far. Appreciate the quick replies.

 

[DARKNESS]

Aisin makes the OEM one. It says Aisin on it.

 

[Bloomer]

Aisin makes the OEM one. It says Aisin on it.

Well, that makes it easy.

 

[inkpot]

It's really easy if you can bleed brakes. Disconnect the 4 nuts holding it on. Disconnect the 2 fittings using a flare wrench (not a normal wrench or you'll strip them). Disconnect the level sensor connector. Pull the MC off.

You want to bench bleed the new MC before replacing. You can get a bench bleeding kit at any auto parts store. You just use two fittings in the holes in the MC and attach hoses, put the hoses in the MC reservoir, fill the reservoir with brake fluid, push the plunger several times to cycle fluid through the MC to get rid of the air.

Now install the new MC the same way you took it off. Finally bleed the brakes.

I would turn the sequence around. Disconnect the two flair nut fittings on the brake lines first. That way the assembly is still mounted to the booster while you wrestle with it. the 4 mounting nuts are pretty easy, just make note of where the bracket around the bottom goes.

 

[DARKNESS]

Good point