Cab Air Conditioning Standards for Diagnosis and Repair
High A/C Costs
It is important to establish standards for Cab A/C maintenance because Cab A/C is one of the highest cost accessories on vehicles today. A study was conducted to identify high cost components and establish standards for Cab A/C diagnostic and repair procedure.
The results indicated that following these guidelines have:
lowered overall Cab A/C cost,
reduced Cab A/C breakdowns,
increased driver satisfaction,
reduced labor hours spent on non-scheduled Cab A/C repairs, and
created a pro-active approach to Cab A/C Preventive Maintenance.
Air Conditioning Technicians must successfully complete Cab Air Diagnostics training, follow trained procedures, and strictly adhere to standards when performing inspections, diagnostics, repairs and/or making adjustments.
Providing excellent Cab A/C maintenance and repairs increases vehicle utilization and driver confidence level. It also provides drivers the comfort they need on the highway and during rest periods.
The Fleet Owner benefits with:
improved available labor time,
planned, predictable cost,
reduced operating cost,
improved decision making, and
a pro-active workforce.
Cab A/C Maintenance Standards
Replacement parts must meet OEM specifications.
If system failure was the result of a mechanical failure or if any sign of system contamination is apparent, the system must be properly flushed and properly purged.
Contaminated refrigerants must never be reused in a A/C system.
When the refrigerant system has to be opened to ambient conditions, the drier/accumulator must be replaced.