The way that the T/V is designed it would be very difficult to suck up brake fluid into the intake. Some other power brakes had the vacuum come in at the bottom of the canister. Bendix came in high on the side. To see how difficult it would be try this.
Fill a glass half full of water.
Hold a straw 1/4 of the way into the glass so that you have a 1/4 air gap between the end of the straw and the top of the water.
Now try to suck up the water through the straw.
When you discover that you cannot do that, try this
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