MTO annual inspection checklist

Before you book

An annual inspection is not a repair appointment, but it usually becomes one. Going in with the unit prepared is the difference between a half-day visit and a truck sitting in the yard waiting on parts.

Bring the previous inspection report and your CVOR number. Both speed up the paperwork, and the previous report tells the technician which items were marginal last year — those are the ones most likely to fail now.

• Wash the underside if you can. A technician cannot measure what is buried in road salt and grease.
• Note any known defects up front. Hiding them does not help; it just spends inspection time on discovery.
• Empty the unit where practical, and make sure it has fuel and DEF for a road test.
• If the sticker expires within the week, say so when you book — those get priority scheduling.

Brake system

Brakes are where most annuals are won or lost. Every wear item is measured against a limit, not judged by eye, and a single wheel end out of spec fails the unit.

Slack adjusters deserve a specific mention. A seized or mis-adjusted slack causes the uneven lining wear that fails units, and it is cheap to fix compared with a full brake job caused by ignoring it.

Steering and suspension

These items rarely fail suddenly, which is exactly why they get missed between inspections. Play accumulates gradually until it crosses a limit.

• Steering box and linkage play measured at the wheel, with the engine running.
• Kingpins and wheel bearings checked for vertical and lateral movement.
• Springs inspected for cracked or shifted leaves and broken centre bolts.
• Air bags and shocks checked for leaks, chafing and blown units.
• U-bolts, hangers and torque rods checked for looseness and cracking.

Tires, wheels and coupling

Tread depth is measured, not estimated, and the minimums differ between steer and other positions. Sidewall damage, exposed cord and mismatched duals all fail regardless of remaining tread.

• Steer tires require more remaining tread than drive or trailer positions.
• Rims and wheels checked for cracks, bent flanges and elongated stud holes.
• Fasteners checked for looseness, rust streaking and missing nuts.
• Hub oil level and seal condition inspected — a weeping seal contaminates brakes.
• Fifth wheel, kingpin and plate wear measured; pintle hooks and safety chains checked.

Fifth wheel wear is worth watching between annuals. Excess play is a serious defect, and it develops slowly enough that drivers stop noticing the extra movement.

Lighting, electrical and cab

Lighting defects are the easiest thing to fix and among the most common reasons a unit needs a second visit. Walk around the truck with the lights on before you bring it in.

• All required lamps, reflectors and conspicuity tape present and working.
• Wiring checked for chafe, splices and corrosion at connectors.
• Trailer cords and gladhands inspected for damage and leaks.
• Seats, seat belts, mirrors, wipers, washers, horn and defrost checked.
• Gauges and warning lamps verified — an inoperative warning lamp is itself a defect.

Engine, exhaust and aftertreatment

The annual is not an emissions test, but the exhaust and aftertreatment systems are inspected for leaks, damage and mounting, and any active fault lamp needs explaining.

• Exhaust leaks, missing shields and broken mounts identified.
• DPF, DEF and SCR systems scanned for stored and active faults.
• Fuel tanks, lines and straps checked for leaks and security.
• Driveshafts, U-joints and carrier bearings checked for play and guards.
• Frame, crossmembers and previous repairs inspected for cracks.

What happens if it fails

A failed annual is not a disaster; it is a list. You get the itemized defects with photographs, and a written quote that separates what must be repaired to pass from what can reasonably wait.

Most units are repaired and stickered in the same visit. Anything waiting on a part gets a firm date before you leave, so you can plan around the downtime instead of calling for updates.

For fleets, the better answer is not managing failures one at a time. A scheduled PM program catches these items on your calendar, at your convenience, instead of on inspection day.