Air Intake and Exhaust System Operation and Tests
AIR FILTER RESTRICTION INDICATOR
1. Remove air filter restriction indicator switch from air
2. Install pipe nipple (C), tee fitting (B), and gauge (A)
from D05022ST Water Vacuum Gauge Kit into air filter
restriction indicator hole. Install air filter restriction
indicator into tee fitting.
3. Start engine and slowly cover the air cleaner inlet with
a piece of paper or cardboard.
4. Air restriction indicator must show red at 5.6--6.8 kPa
(56--68 bar) (22.7--27.3 in. water) (1.6--2.0 in. hg)
If air restriction indicator shows red at any other value
than listed above, install a new indicator.