Vacuum Piping

Vacuum Piping





1. Pull out the Hose A in figure and install a vacuum gauge.
2. Plug up Hose B in figure to prevent the leak of vacuum.
3. Start the engine and measure vacuum 2 or 3 minutes afterward.
4. Repeat 1) and 2) but with Hose A plugged and Hose B pulled out.
5. If vacuum measures -400 mm Hg, or if it shows a sudden drop immediately after engine stop, inspect the hose, tank, and pipe for damage.

Note: Be careful not to permit the entry of dust and water during inspection.

6. Pull out Hose D in illustration.
7. Plug Hose E in illustration.
8. Make sure that Hose D in illustration is under atmospheric pressure.
9. Pull out Hose E and plug Hose D, and make sure that Hose E is under atmospheric pressure.
10. If Check 8) or 9) has revealed stoppage, check and see that there is no bend, foreign matter in the hose or in the filter. If there is trouble, repair or replace.