TM 5-3805-281-24-1
Tests
AIR FILTER RESTRICTION INDICATOR
SWITCH TEST
SPECIFICATIONS
Air Filter Restriction Indicator
6.2 kPa (62 mbar) (25 in. water)
Must Come On At Vacuum
ESSENTIAL TOOLS
JT05652 (1/8 F NPT x 1/8 F NPT x 1/8 M NPT) Tee
JT03246 (1/4 F NPT x 1/4 F NPT) (Parker No. 0202-4-4) Coupler
9010
25
SERVICE EQUIPMENT AND TOOLS
3
1/8 in. Barbed Fitting
1/4 in. Barb Fitting
0--15 kPa (0--150 mbar) (0--60 in. water) Vacuum Gauge
1. Remove air filter restriction indicator switch (A).
2. Install parts as shown.
3. Start engine.
4. Slowly cover the air cleaner inlet using a piece of
heavy cardboard or a board.
5. Check reading on gauge when air filter restriction
indicator comes on.
A--Air Filter Restriction Indicator Switch
B--Tee
C--Barbed Fitting
Air Filter Restriction Indicator Must Come On At--Specification
D--Tube
E--Barbed Fitting
Vacuum .................................................. 6.2 kPa (62 mbar) (25 in. water)
F--Coupler
G--Gauge
If reading is not within specifications, install a new
indicator switch.
TX,9010,UU3269 1925OCT971/1
