MM-34
Revised 11-02
Page 31
Alcohol Evaporator
Check the vehicle’s air system for an alcohol
evaporator.
NOTE:
Typically, an alcohol evaporator will be
installed in the line between the air dryer and the
supply (wet) tank. Common installations are on
the truck’s firewall, on a frame rail and behind the
cab. However, an alcohol evaporator can also be
found at other locations.
1.
Check the vehicle’s air system to determine if
an alcohol evaporator is installed.
2.
If an alcohol evaporator is installed in the air
system, check for a bypass line connected to
the evaporator.
Figure A.6
.
3.
If a bypass line is connected to the evaporator;
check to see if a check valve is installed in the
bypass line. If check valve is installed:
O
Remove the check valve from the bypass
line,
O
Remove the bypass line and
O
Replace the bypass line with 1/4-inch
nylon line.
Figure A.6
1002188a
LINE FROM
AIR DRYER
ALCOHOL
EVAPORATOR
LINE TO
SUPPLY TANK
