Weekly Pre-Trip Inspections
The following weekly pre-trip inspection should be completed before loading the truck. Weekly inspection does not replace the regular maintenance inspections (see the scheduled maintenance inspection section); however, it is an important part of the preventive maintenance program to avoid operating problems before they occur.
Leaks. Inspect for refrigerant leaks and worn coolant lines.
Battery. Terminals should be properly tightened and show no signs of corrosion.
Belts. Check for cracks, wear, and proper belt tension.
Mounting Bracket. Ensure that bolts are fully tightened.
Electrical system. Electrical connections should be securely fastened. Wires and terminals should show no signs of corrosion, cracks or dampness.
Structural. Visually check for physical damage.
Coils. The condenser and evaporator coils should be clean and free of debris. Washing with clean water should be sufficient. The use of cleaning agents or detergents is strongly discouraged due to the possibility of degradation of the construction. If using a power washer, the nozzle pressure should not exceed 600 psi (41 bar). For the best results, spray the coil perpendicular to the face of the coil. The spray nozzle should be kept between 1 inch and 3 inches (25 to 75 millimetres) from the coil surface. If necessary to use a chemical cleaner or detergent use a cleaner that does not contain any hydrofluoric acids and is between 7 and 8 on the pH scale. Ensure dilution instructions provided by the detergent supplier are followed. In case of doubt about the compatibility of the detergent with the type of materials listed above, always ask the supplier a written confirmation of the compatibility. Should a chemical cleaner be required, it is MANDATORY that all components are thoroughly rinsed with water even if the instructions of the cleaner specify that it is a “no rinse” cleaner. Failure to comply with above mentioned guidelines will lead to a shortened life of the equipment to an indeterminable degree. The repeated transportation of meat and fish waste can cause extensive corrosion to the evaporator coils and evaporator section tubing over time due to ammonia formation and can reduce the lifespan of the coils. Appropriate additional measures should be taken to protect the coils against the aggressive corrosion that can result from transportation of such products.
Load Compartment. Inspect the interior and exterior of the truck for any damage. Any damage to the walls or insulation should be repaired.
Defrost Drains. Check the defrost drain hoses and fittings to ensure they are not blocked.
Doors. Ensure that doors and weather seals are in good condition and seal hermetically.
Sight Glass. Check that the refrigerant charge sight glass on the running unit is totally full (the cargo compartment temperature must be approximately 0ºC).