Preliminary Checks

sb mm 83.02.001
  1. Park the vehicle on a level surface, shut down the engine, apply the parking brake, and chock the tires.
  2. Make sure that the refrigerant compressor drive belt is not damaged and that it is correctly tensioned. Also check the tightness of the compressor mounting fasteners. For instructions and torque values, see General Information, Cummins ISB Series Engine of the Shuttle Bus Chassis Workshop Manual, or take the vehicle to an authorized Freightliner dealer.
  3. Using a feeler gauge, check for correct clutch clearance. For instructions, see  of the Shuttle Bus Chassis Workshop Manual, or take the vehicle to an authorized Freightliner dealer.
  4. Inspect the compressor clutch coil wire. Check the connector for damage or looseness. Replace the wire if it is damaged.
  5. Check for broken, burst, or cut hoses. Also check for loose fittings on all parts.

    6. Warning: Wear eye protection when using compressed air to clean parts, as permanent harm to eyes could result from flying debris.

  6. Check for a build-up of road debris on the condenser fins. Using a whiskbroom and air pressure, or a spray of soapy water, carefully clean off the condenser; be careful not to bend the fins.
Note:
Parent topic: Air Conditioner Checking, R-134a Refrigerant System
Document Number: 0000119867
Manual Publication Date: 2025-01-08
Topic Publication Date: 2025-01-08