With diesel engine
Do not parse. Vacuum pump -1-. Vacuum hose to brake booster -2- with non-return valve.
With petrol engine
Do not parse. Vacuum pump -1-. Vacuum hose to brake booster -2- with non-return valve. High pressure fuel pump -3-.
Check valve check
The non-return valve -A- must allow air to flow in the direction of the arrow. When supplying air in the opposite direction, the valve must remain closed and not allow air to pass through. Install the valve correctly!
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