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91 560 SEL
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233 Posts
Discussion Starter #1
I am looking for the 3 way vacuum hose connector that plugs to the yellow vacuum check valve (1268000078). I have looked allover but no luck. this connector and this check valve are on the driver's side near firewall. the check valve also comes with the ring (1268050099). Just need the part number for the 3 way connector
 

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Outstanding Contributor
1989 560SEC, 1989 560SEL, 1995 E420
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4,007 Posts
The three-way part number is 1170780145. Be sure to buy MB for quality rubber.

FYI, the four-way part number is 1170780045.
 

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Outstanding Contributor
1989 560SEC, 1989 560SEL, 1995 E420
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4,007 Posts
macdiety, I've never seen a configuration like that before. Looks like you could get rid of the three-way underneath and just use the four-way to connect engine vacuum to the three check valves, no? That's how my cars are. You'd have less joints to potentially leak.
 

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1991 500SEC sub 50K mi. 1987 560SEC Now 150K mi. 2018
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3,974 Posts
macdiety, I've never seen a configuration like that before. Looks like you could get rid of the three-way underneath and just use the four-way to connect engine vacuum to the three check valves, no? That's how my cars are. You'd have less joints to potentially leak.
Hey luckymike,

I thought that as well earlier today and found some pics of my 560 when I had all that apart some years ago... I only use the 4-way too. I have but two check valves though.

On his setup, with one 4-way on there you'd have vacuum source feed on one connection, the others would go to the 3 check valves... But how about the 'Economy' Gauge feed?

M..
IMG_0439.JPG IMG_0440.JPG
 

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Outstanding Contributor
1989 560SEC, 1989 560SEL, 1995 E420
Joined
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4,007 Posts
Hey luckymike,

I thought that as well earlier today and found some pics of my 560 when I had all that apart some years ago... I only use the 4-way too. I have but two check valves though.

On his setup, with one 4-way on there you'd have vacuum source feed on one connection, the others would go to the 3 check valves... But how about the 'Economy' Gauge feed?

M..
View attachment 2610610 View attachment 2610611
MBL87560SEC, I see exactly what you mean and you're right. Still, I've never seen that before. I'd like to see a three way on top to eliminate the plug and clean it up a little.

Here are pics of my 1989 SEC (four-way) and 1989 SEL (three way) just for fun.
 

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