Doosan DL200, Operation And Maintenance Manual

Page: 203 / 256

OP000509
4-59
Inspection, Maintenance and Adjustment
Replace Air Conditioner Inner Filter
NOTE:
This unit is equipped with an air filtration system
which filters out dirt and dust particles from air being
circulated into operator's cabin. This filter must be
cleaned out every 500 hours and replaced with a new
one every 1,000 hours. For filter replacement See
“Clean Air Conditioner Inner Filter” on page 4-51
NOTE:
In the event that the equipment is being operated in a
dusty environment, the cleaning and replacement
must be performed more frequently.
Check Air Conditioner Refrigerant
1. Apply the parking brake and lower attachment to the
ground.
2. Remove the cover.
3. Press the "HI" flow control switch to set maximum air
flow.
4. Set the temperature control switch fully to the cool
position and fully open the cabin doors.
5. Slightly accelerate the engine to about the middle
speed range (compressor speed 1500 - 1800 rpm).
6. Compare the flow of bubbles in the sight glass with the
drawings in the following table.
WARNING!
Mixing of tobacco smoke and freon is deadly.
Do not smoke while servicing or recharging
air-conditioning system.
FG004075
Figure 96
CAUTION!
Overfilling refrigerant may cause dangerous
high-pressure and poor cooling action; and low
refrigerant level may cause compressor damage.
Always maintain refrigerant at normal level.