Checking Air Conditioning System

CAUTION: Avoid possible injury. Improper servicing may cause refrigerant to penetrate eyes and skin or cause burns.

IMPORTANT: R134A refrigerant must be used. This requires special equipment and procedures. See your John Deere Dealer.

NOTE: Some oil seepage from compressor shaft seal is normal.

Check the following if air conditioner will not cool, or cooling is intermittent:

• Clean grille, radiator, and oil cooler condenser. (See Cleaning Radiator and Oil Cooler Condenser in this section.)
• Inspect and clean cab air filters. Replace filters if required. (Cleaning and Replacing Cab Air Filters in this section.)
• Operate engine at 2000 rpm and set air conditioning switch (A) to ON position and blower switch (B) to HIGH position. Check sight glass (C) for bubbles. System may be low on refrigerant if bubbles do not disappear.

NOTE: In early version tractors only, bubbles may appear in sight glass when operating at temperatures below 18°C (65°F). Bubbles should disappear as temperature rises.

If problems persist, see your John Deere Dealer.

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