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SECTION 2 - OPERATION
2-31
4. The recirculation knob, 4, controls the mix
between external air and recirculated cab air.
To increase the amount of fresh air entering
the cab, rotate the k nob counterclockwise.
Rotate the knob clockwise to recirculate the
cab air. Do not block the recirculation vent
when recirculating cab air.
NOTE: The left-hand side of the cab roof
has a second recirculation vent that has a
fixed opening and is not adjustable.
IMPORTANT: Always turn the air conditioner
off when cooled or dehumidified air is not
required. For proper air conditioner operation,
the cab air filter must be serviced regularly.
Pressurizer Vents
The pressurizer fan has several adjustable vents
to direct air flow as required. All vents can be
rotated to adjust direction and have adjustable
fins to direct the angle of air flow. The forward
vents, 1, can be adjusted for the front or side
windows. The rearward vents, 2, are for operator
comfort.
Figure 2-44
1
2
For additional comfort, a floor vent, 1, is provided
at the bottom of the right console.
Figure 2-45
1