Question concerning install of new brake master cylinder on 1991 560SEL - PeachParts Mercedes-Benz Forum

HuskyMan · #1 09-19-2017, 10:36 AM

So today I'm planning on installing a new ATE master cylinder on the 1991 560SEL. Here's the plan:

1. Drain the old brake fluid from the reservoir using my MityVac.

2. Removing the reservoir and old brake master cylinder.

3. Install new ATE brake master cylinder using new rubber grommet/seal that came in the box.

4. Install new rubber grommet between new brake master cylinder and reservoir.

5. Bleed new ATE brake master cylinder on the car using pressure bleeder.

Question; do either of the rubber seals/grommets need any special type of lubrication or do I simply install them dry.

Also, I've read two different schools of thought concerning bleeding the master cylinder. One says to pressure bleed it on the car, the other says to bench bleed it. Comments and assistance are appreciated.....