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Brake Master cylinder replacement....
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m3456y
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PostPosted: Sat Nov 09, 2019 8:36 am    Post subject: Brake Master cylinder replacement.... Reply with quote

Can this be done without removing the fuel tank?
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Q-Dog
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PostPosted: Sat Nov 09, 2019 8:45 am    Post subject: Re: Brake Master cylinder replacement.... Reply with quote

Yes.
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Cusser
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PostPosted: Sat Nov 09, 2019 9:21 am    Post subject: Re: Brake Master cylinder replacement.... Reply with quote

Yes. I'd recommend jack stands and remove the front driver side wheel.

Brake master cylinder hints
Hints (first get a repair manual):
1. Use a baster or similar to pull brake fluid out of the reservoir before starting.
2. Use an 11mm flare wrench for initial loosening and final tightening of the nuts on the brake lines.
3. Pull brake lines back GENTLY, don't bend.
4. Leave mounting bolts in place in the pan when loosening (socket and extension), so the spacers don't fall in and get lost forever. If you do need to make them. They are 1.088 inches long, OD is 0.474 inches, ID is 0.315 inches.
5. Bench bleed the new MC before installing; yeah, some fluid will drip out, enough will stay in.
6. Thread in the line nuts before mounting the MC, so there's a little wiggle room to thread them in several turns, by hand.
7. Have a helper hold/maneuver the MC into position so you can get the two mounting bolts installed.
8. Use a flare wrench final tightening of the nuts on the brake lines.
9. Adjust brakes manually with a screwdriver, all four wheels.
10. Bleed all four wheel cylinders.
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gt1953
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PostPosted: Sat Nov 09, 2019 9:21 am    Post subject: Re: Brake Master cylinder replacement.... Reply with quote

I can be done with one person but two or an assistant is way better. Be aware of the sleeves that are in the fire wall. Another words don't remove the bolts all of the way as you will loose the sleeves. Wish I had an exploded view.
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finster
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PostPosted: Sat Nov 09, 2019 11:01 am    Post subject: Re: Brake Master cylinder replacement.... Reply with quote

here's one. part 17 is the sleeve/spacer - correct orientaion of bolt 18 is at bottom of page. Wink
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wayne1230cars
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PostPosted: Sat Nov 09, 2019 12:31 pm    Post subject: Re: Brake Master cylinder replacement.... Reply with quote

m3456y wrote:
Can this be done without removing the fuel tank?

I have changed master cylinders with the fuel tank installed and with the fuel tank removed. To remove the tank is simple - 4 bolts. Itís better if the tank is empty or at least low on fuel.

I removed the tank for the last master cylinder replacement I did as I was converting from a single circuit to dual circuit m/c and replacing all the steel lines. Having the tank removed made things much easier in that case. Also I spotted a very marginal steering coupler. Having the tank removed makes that job easier. When just changing the m/c and no other work, I just remove left front wheel and use axle stands.
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m3456y
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PostPosted: Yesterday 4:57 am    Post subject: Re: Brake Master cylinder replacement.... Reply with quote

Cusser wrote:
Yes. I'd recommend jack stands and remove the front driver side wheel.

Brake master cylinder hints
Hints (first get a repair manual):
1. Use a baster or similar to pull brake fluid out of the reservoir before starting.
2. Use an 11mm flare wrench for initial loosening and final tightening of the nuts on the brake lines.
3. Pull brake lines back GENTLY, don't bend.
4. Leave mounting bolts in place in the pan when loosening (socket and extension), so the spacers don't fall in and get lost forever. If you do need to make them. They are 1.088 inches long, OD is 0.474 inches, ID is 0.315 inches.
5. Bench bleed the new MC before installing; yeah, some fluid will drip out, enough will stay in.
6. Thread in the line nuts before mounting the MC, so there's a little wiggle
room to thread them in several turns, by hand.
7. Have a helper hold/maneuver the MC into position so you can get the two mounting bolts installed.
8. Use a flare wrench final tightening of the nuts on the brake lines.
9. Adjust brakes manually with a screwdriver, all four wheels.
10. Bleed all four wheel cylinders.



Thanks, Just what I needed!
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VW_Jimbo Premium Member
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PostPosted: Yesterday 7:41 am    Post subject: Re: Brake Master cylinder replacement.... Reply with quote

m3456y wrote:
Cusser wrote:
Yes. I'd recommend jack stands and remove the front driver side wheel.

Brake master cylinder hints
Hints (first get a repair manual):
1. Use a baster or similar to pull brake fluid out of the reservoir before starting.
2. Use an 11mm flare wrench for initial loosening and final tightening of the nuts on the brake lines.
3. Pull brake lines back GENTLY, don't bend.
4. Leave mounting bolts in place in the pan when loosening (socket and extension), so the spacers don't fall in and get lost forever. If you do need to make them. They are 1.088 inches long, OD is 0.474 inches, ID is 0.315 inches.
5. Bench bleed the new MC before installing; yeah, some fluid will drip out, enough will stay in.
6. Thread in the line nuts before mounting the MC, so there's a little wiggle
room to thread them in several turns, by hand.
7. Have a helper hold/maneuver the MC into position so you can get the two mounting bolts installed.
8. Use a flare wrench final tightening of the nuts on the brake lines.
9. Adjust brakes manually with a screwdriver, all four wheels.
10. Bleed all four wheel cylinders.


Thanks, Just what I needed!


11. Pump the pedal several times and readjust. That will recenter the shoes and give you the best adjustment and action for good stopping. If in doubt recenter the shoes a few times and readjust, I do!
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