Daewoo Mega 250-V, Operation And Maintenance Manua

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4-46 Inspection, Maintenance and Adjustment K1000896E Operation and Maintenance Manual
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 cab 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.
CHECK AND ADJUST ENGINE
Contact your nearest Daewoo loader dealer.
Engine dealer for checking and adjusting the following items:
• Engine Compression Pressure.
• Injection Pressure.
• Injection Timing.
WARNING!
Mixing of tobacco smoke and freon is deadly.
Do not smoke while servicing or recharging air-conditioning system.
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.
Amount of
Refrigerant
Appearance of the Sight Glass Solutions
Normal
Almost clear.
Any bubbles disappear if the engine
speed is increased to 1500 rpm.
High No bubbles are seen.
Contact your local Daewoo loader
dealer for inspection and
recharging refrigerant.
Low A flow of bubbles is visible.