
Ensure that the vehicle is capable of meeting the desired maintenance interval. For example, a trailer is still required to have regular lubrications (greasing) and scheduled maintenance inspections performed. Even if the trailer is usually attached to a truck, it cannot use the trucks engine hours or odometer to determine the interval. Additionally, if the trailer isn't equipped with a hubmeter, then that interval type cannot be selected.
Now that the interval type has been determined, the carrier must define the absolute maximum frequency between intervals that the lubrication and scheduled maintenance inspections will be performed. There is a lot that can go into calculating this duration. This can include the age, intended use, frequency of use, area of operation, and other environmental factors. If you need assistance with determining intervals, please contact
support@compliancebox.ca to have a CayCan Safety Consulting expert assist you.
How to ensure effective maintenance intervals have been selected
A good preventative maintenance program is continuously monitored and improved over time. In practice, a good program will identify small issues before they grow into larger ones. In theory, when a vehicle goes in for a Periodical Maintenance Vehicle Inspection (PMVI) or a Commercial Vehicle Inspection Program (CVIP) there should be zero defects found. The PMVI/CVIP is a certified inspector providing their stamp that the company's preventative maintenance program is working effectively. Ideally, the deficiencies are caught in Daily Vehicle Inspection Reports (DVIR) or the scheduled maintenance inspections. Therefore, it's crucial for a company to monitor the results of each DVIR, scheduled maintenance inspection, repair, PMVI/CVIP, and roadside compliance inspections to identify trends. If there are frequent issues found in scheduled inspections or by roadside compliance officers corrective action should be taken. Perhaps drivers need additional training to help identify these defects, or the frequency of inspections should be increased.

A carrier that selects a lubrication and/or scheduled maintenance inspection to be completed every 1,000,000 kilometres likely doesn't have a reasonable interval defined. There will likely be both mechanical and safety-related deficiencies that can be identified well before the next lubrication or inspection.
On the other hand, the carrier should ensure that they are in compliance with their stated intervals. If they are being exceeded, even by a little bit, then the company is not following their written program and can experience negative results in a compliance audit or investigation.

A carrier that selects a lubrication and/or scheduled maintenance inspection to be completed weekly isn't likely to remain compliant with their written program. If the actual intervals of lubrications or scheduled maintenance inspections exceed what is in writing a violation will be assigned.