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Under-Vehicle Inspections

Schedule 4 inspections are conducted by technicians who hold a valid certificate of qualification as a truck and coach technician.

The inspection requires a detailed examination of the under-vehicle components and systems of the coach. Schedule 4 inspections are conducted while the coach is positioned over a pit or raised in a manner that provides adequate access to all of the applicable under-vehicle components.

Technicians are required to sign the schedule 4 inspection report certifying that the components and systems inspected under Schedule 4 meet the prescribed standards on the date of inspection.

The following Schedule is directly from the Regulation and has not been modified.

Please note that section 16 of Part VI of the Regulation provides "notes to the schedules". It is not a requirement that these "notes to the schedules" be included with or attached to the schedules. Numbers within brackets, i.e. (1), (12) etc. found within the schedules are a reference to the "notes to the schedules" and are not required to be in the schedules.

Schedule 4

(Schedule 4, in Word format)

Under-Vehicle Motor Coach Inspections
Systems and Components Defects

Part 1. Air Brake System
  1. audible air leak.
  2. brake pushrod stroke is beyond the adjustment limit.(1)
  3. clearance between disc brake pads and rotor exceeds manufacturer's specified limit.
  4. clearance between a brake caliper piston and the disc pad backing plate exceeds manufacturer's specified limit.
  5. wedge brake shoe movement exceeds manufacturer's specified limit.
  6. excessive discharge of fluids from air reservoir.
  7. air compressor, mounts or attachments damaged or defective.
  8. compressor drive-belt loose or damaged.
  9. air line or fitting damaged or insecure.
  10. air tank defective, damaged or insecure.
  11. air tank drain or moisture ejector device inoperable.
  12. brake chamber, brake linkage or other brake component is defective, damaged or insecure.
  13. Double Diaphragm 3 brake chamber fails to hold vehicle in place during tug test, when all air reservoirs are drained.
  14. spring brake is broken or malfunctions.
  15. inoperative service, parking or emergency brake.

Part 2. Exhaust System
  1. exhaust leak.
  2. exhaust system component insecure, damaged or perforated.

Part 3. Frame and Underbody
  1. any frame member or fastener is damaged, cracked or insecure.
  2. any component mount is damaged or insecure.

Part 4. Fuel System
  1. fuel leak.
  2. insecure fuel tanks, fuel tank mounts or guards.
  3. fuel line or fitting damaged or insecure.

Part 5. Steering
  1. steering linkage is damaged or insecure.
  2. power steering fluid is leaking, contaminated or low.
  3. power steering component damaged or insecure.

Part 6. Suspension System
  1. air leak or malfunction of air suspension system or component.
  2. damage or deterioration of any suspension component including:
    1. spring and air bag,
    2. axle or frame attaching component,
    3. axle supporting or aligning component,
    4. suspension or component fastener, and
    5. shock absorber or attachments.

Part 7. Tires
  1. tire inflation less than required.(15)
  2. tire tread is less than wear limit.(11)
  3. damage to tread or sidewall of tire.
  4. retread or rebuilt tire is used on front axle.

Part 8. Wheels and Fasteners
  1. loose, missing, damaged or ineffective wheel fastener.
  2. damaged wheel or wheel component.

Under-Vehicle Inspection Report

Technicians are required to complete and sign an under-vehicle inspection report immediately following inspection of the coach. Normally the report is left in the vehicle for the driver to produce to an officer.

Under-vehicle inspection reports are created or purchased retail by the operator.

An under-vehicle inspection report must contain the following:

  • the licence plate number or vehicle identification number of the motor coach.
  • the operator's name.
  • the date of the inspection.
  • the address, including the city, town or village, where the inspection was conducted.
  • the printed name of the person who conducted the inspection.
  • the odometer reading of the motor coach at the end of the inspection.
  • a statement, signed by the person who conducted the inspection, that the motor coach was inspected in accordance with this Regulation and that at the end of the inspection, there are no defects listed in Column 2 of Schedule 4.

Sample 6: Under-Vehicle Inspection Report

(Sample 6, in Word format)

Information to be recorded:

  • operator's name
  • odometer reading
  • licence plate number
  • vehicle identification number
  • date of the inspection
  • inspection location
  • technician's signature, preceded by the statement "Motor coach was inspected in accordance with the Regulation and there are no defects listed in Column 2 of Schedule 4."
  • technician's printed name

Technicians are required to record the following information on a work order or other type of maintenance record or document for the coach:

  • any defects listed in Column 2 of Schedule 4 found during the inspection or, if none were found, a statement that no such defects were found,
  • list of repairs made, if any, and
  • brake travel measurements /clearances.

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