Keep your refrigerated trailers and wallets cool by taking some preventive measures. Pre-cooling and setting the proper temperature when loading can reduce the number of services calls on your units. PLM Fleet recommends the following tips for pre-cooling your trailer during hot weather:

1. Driver Pre-Trip Inspection

• Always perform a pre-trip inspection to ensure there are no worn or damaged parts before starting your trip.

2. Check Oil, Water, and Fuel Levels Daily

• Hot temperatures can strain the engine of the refrigeration unit. Checking the oil level ensures sufficient lubrication, and helps to manage friction and heat buildup. An insufficient amount of oil can lead to engine damage or failure, especially in hot conditions.

3. Remove Debris from Return Air Bulkhead

• Ensure there is no debris in the return air bulkhead. Debris can prevent proper airflow, causing the trailer to cool down slower, which can seriously impact temperature control during warm months.

4. Pre-Cool Trailer Before Loading

• Pre-cool your trailer to within 10 degrees below the desired set point of the product being loaded. Refrigerated units are designed to maintain temperature, not to lower the product temperature over time. Verify that the product is pre-cooled to the desired temperature before loading.

5. Turn Off Transport Refrigeration Unit (TRU) While Doors Are Open

• Leaving the TRU running while the doors are open will suck in hot outdoor air, causing you to lose cool temperature faster and overwork the TRU, leading to failures and more wear.

6. Inspect Your Tires

• Always check your tires, especially in hot temperatures, as heat can increase tire pressure. Overinflated tires are more prone to blowouts, reduced traction, and uneven wear. Regular inspections during hot weather allows for adjustments to maintain optimal tire pressure.

7. Inspect Air Lines FOR Chafing, Leaks, and Rubbing

• Hot temperatures can exacerbate wear and tear on air lines, making them more susceptible to cracking or leaks. Inspecting the lines helps identify potential weak points or damage that could lead to air leaks, affecting the trailer’s braking system and refrigeration unit. Regular inspection helps detect signs of chafing or rubbing early, allowing for preventive maintenance.

8. Driver Post-Trip Inspection

• Always inspect the trailer for safety measures after your trip. Please note that PLM offers full-service maintenance with 24/7 emergency service, mobile service that comes to you, a team of fleet experts, and more.

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