Truck cab A/C maintenance is one of the highest costing but when done right gives several benefits to fleet owners and drivers alike, including the following:
- Improved available labor time
- Reduced operating cost
- Pro-active workforce
- Improved driver comfort
Here are some established Cab air conditioning maintenance standards:
- Replacement parts need to meet OEM specifications.
- Systems must be properly flushed and purged if the system’s failure was caused by a mechanical failure or if there’s any sign of system contamination.
- Never re-use contaminated refrigerants in an A/C system.
- You need to replace the drier/accumulator if the refrigerant system has been opened to ambien conditions.
- Perform a vacuum test and evacuate the system with a quality micron guage.
- Never top off a refrigerant system to get your vehicle back on the road.
- Technicians working on cab A/C systems need to be Section 609 certified.
- A/C systems should generally not be converted to another refrigerant.
- For checking and adjusting belt tension, the required tools are the Dayco Krikit gauge I P/N U29 93865 (for V Belts), and Krikit II P/N U29 93866 (for multi-rib belts).
- If you find a belt that’s 20 lbs. or more under the recommended tension, replace the belt and adjust it with the Krikit gauges listed above.
- After you complete the A/C service, reinstall service port caps.
- Purchase refrigerant oil in small containers.
- Don’t use pressure washers to clean condenser fins.
A/C maintenance training and reference materials: