Operation
Operating the Fan
The fan has 4 speeds ( O FF , L OW , M EDIUM , and H IGH ).
Rotate the fan-control knob to regulate the speed of
the fan.
Rotate the temperature-control knob to regulate the
air temperature in the cab.
Maintenance
Servicing the Heater Air
Filter
Service Interval : Every 250 hours —Change the
heater air lter (more frequently in
dusty or dirty conditions).
Note: The heater air lter is designed to keep the
cabin air clean.
1. Remove the lter access cover from the heater
box assembly ( Figure 25 ).
g41 1877
Figure 25
1. Filter access cover
2. Gently remove the lter from the heater box
assembly .
Note: Do not attempt to clean the lter .
3. Inspect the new lter for damage by looking
into the lter while shining a bright light on the
outside of the lter .
Note: Holes in the lter appear as bright
spots. Inspect the element for tears, an oily
lm, or damage to the rubber seal. If the lter is
damaged, do not use it.
Note: Use care when handling the lter to avoid
damaging or deforming it.
4. Carefully install the lter .
5. Install the lter access cover on the heater box
assembly with the corresponding hardware.
Cleaning the Heater
Important: Do not get the heater box or heater
components wet.
15