❑
Engine Oil Dipstick
Engine oil level should always be between the
lines on the dipstick, never above or below them.
The ATB 42/50 should be on level ground when
you check the dipstick.
Check the oil level after the engine has been
turned off a few minutes so that oil can run down
out of the engine into the sump.
■
Filter Minder
The air filter gauge, filter minder, is located just
above the ground control box.
The gauge measures the vacuum (air pressure)
between the intake manifold and the air filter.
❑
Filter Minder Indicators
As the filter clogs, the vacuum increases
(pressure drops). As the vacuum increases, the
yellow indicator (1) raises toward the red area (2)
of the sight glass. When the yellow indicator
reaches the red, it’s time to change the air filter.
The yellow indicator (1) stays at its highest
setting. It does not go to the bottom of the sight
glass when the engine is turned off. After the filter
is changed, press the small RESET button (3) to
reset the yellow indicator to the bottom of the
sight glass.
■
Fuel
The fuel gauge is located on top of the gasoline
or diesel fuel tank. Read the fuel gauge at the line
in the clear plastic window. The gauge reads in
fractions-of-a-full-tank.
DO NOT run a diesel fuel tank empty. Air in the
fuel line makes a diesel engine hard to start.
page 4 - 2
ATB 42/50 – 0161987
4. Gauges
CAUTION
Gasoline engine
Diesel engine
