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Coordinated Inspection Sequence
combination The suggested method applies to a combination of a semi-trailer with a sliding bogie, equipped with air brakes, hitched to a tractor truck. Use a coordinated sequence: top to bottom, left to right, front to back. The 10 steps are: (1) approach and preliminary cab check, (2) front of tractor, (3) left side of tractor, (4) centre left of semi-trailer, (5) rear left of semi-trailer, (6) rear of semi-trailer, (7) rear right of semi-trailer, (8) centre right of semi-trailer, (9) right side of tractor, (10) inside the cab. Elements in bold are mandatory; numbers in parentheses refer to the components table.
Key Rules
- ✓Inspect systematically: top to bottom, left to right, front to back
- ✓Follow the 10-step sequence around the entire combination and end inside the cab
- ✓Keeping the circle check report and applicable defect list(s) on board the vehicle is mandatory
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Step 1 - Approaching and Preliminary Cab Check
combination Observe the combination's general condition for indications of defects: a sagging vehicle (broken spring or air leak from air spring), nonparallel wheels (missing/broken spring suspension part), a displaced axle (abnormal axle/wheel displacement), and fluid traces on the ground (fuel or oil leak). Enter the cab on the driver's side, close the door, confirm the parking brake is engaged on both tractor and trailer, turn on low beams, parking/tail lights and right turn signal, check the driver's door operation, then get out and check for emergency equipment.
Key Rules
- ✓Make sure the parking brake is engaged on both the tractor truck and the trailer
- ✓A sagging vehicle may indicate a broken spring or air spring leak; nonparallel wheels indicate suspension damage
- ✓Check the opening/closing of the driver's door (10.1) and presence of emergency equipment (7.1, 7.3)
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Steps 2-3 - Front and Left Side of Tractor
combination At the front of the tractor, check low beams, parking lights and right turn signal (8.A, 8.B, 8.1), hood-mounted mirrors (11.3), and fixed body components (2.3). Under the hood on the driver's side, check power steering fluid level (5.2), power steering pump belt condition (5.3), visible side rails (2.A, 2.B, 2.1) and suspension (section 14). If equipped with hydraulic brakes, also check master cylinder reservoir fluid (18.1). Along the driver's side check tires/valves, wheels/fasteners, wheel bearing leaks and lubricant, mirror, body, suspension, side rail, exhaust, fuel tank and filler cap.
Key Rules
- ✓Check power steering fluid level (5.2) and pump belt (5.3) under the hood
- ✓If the vehicle has hydraulic brakes, also check the master cylinder reservoir fluid level (18.1)
- ✓Check tires, wheels and fasteners, and wheel bearing leaks and lubricant level along the side
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Steps 4-8 - Semi-Trailer Inspection
combination Inspect the coupling mechanism (fifth wheel), upper coupling plate and kingpin visible parts, and the fifth wheel jaws (use a flashlight if needed). Along the semi-trailer, check the body, side rails and cross members, spare wheel support and anchorages, sliding bogie side rail and locking pins, suspension, tires and valves, wheels and fasteners, and wheel bearing leaks/lubricant. At the rear, check tail lights, right turn signal, and licence plate light.
Key Rules
- ✓Check the fifth wheel jaws, upper coupling plate and kingpin (1.A, 1.E, 1.F)
- ✓Check the sliding bogie side rail and locking pins (2.A, 2.B, 2.C, 2.1, 2.2)
- ✓Check the semi-trailer's tail lights, right turn signal and licence plate light (8.B, 8.1)
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Step 9 - Right Side of Tractor and Turn Signal Check
combination On the passenger side, check parking lights, right turn signal, body, coupling mechanism, upper coupling plate and kingpin, side rails and cross members, suspension, tires and valves, wheels and fasteners, wheel bearing leaks, fuel tank and filler cap, exhaust, passenger door, and mirror. Under the hood, check visible side rails and suspension. Close and latch the hood (passenger side first, then driver side). Return to the cab, activate the left turn signal, climb down safely using three support points, and verify all turn signal lights.
Key Rules
- ✓Latch the hood first on the passenger's side, then the driver's side
- ✓Check turn signal lights on the front, rear of the tractor, and rear of the semi-trailer
- ✓Check the passenger side door (10.A) and mirror (11.2, 11.3)
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Step 10 - Inside the Cab
combination Adjust the driver's seat and check the seat (13.1) and seat belt (13.A). Turn the key to 'ON' and check the steering wheel and column (5.A, 5.1), horn (4.2), mirrors (11.2, 11.3), windshield (11.1), wipers (6.A, 6.1), washer system (6.2), defroster blowers/vents (3.1), side windows (11.1, 11.4), emergency equipment if stowed inside (section 7), and the braking system per the applicable section (17, 18 or 19).
Key Rules
- ✓Check the driver's seat (13.1) and its seat belt (13.A)
- ✓Check steering, horn, mirrors, windshield, wipers, washer and defroster with the key in the 'ON' position
- ✓Check the braking system according to the specific instructions for its type (section 17, 18 or 19)
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Coupling Mechanism and Fifth Wheel Inspection
combination At the rear of the tractor and between the truck and semi-trailer, check the coupling mechanism (fifth wheel example) (1.B–1.F, 1.1, 1.2), the upper coupling plate and kingpin visible parts (1.A, 1.F), and the fifth wheel jaws (use a flashlight for better visibility). Also check truck tail lights, right turn signal, and body. The appropriate components should be inspected for other types of coupling mechanisms.
Key Rules
- ✓Inspect the fifth wheel, jaws, upper coupling plate and kingpin visible parts
- ✓Use a flashlight to inspect the fifth wheel jaws for better visibility
- ✓Inspect appropriate components for whatever coupling mechanism type is present
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Inspection Sequence and Direction
combination The suggested method applies to a combination made up of a semi-trailer with a sliding bogie, air brakes, hitched to a tractor truck. Use a coordinated sequence: top to bottom, left to right, front to back. Elements listed in bold are mandatory to inspect. The 10 steps are: 1) approaching/preliminary cab check, 2) front of tractor, 3) left side of tractor, 4) centre left of semi-trailer, 5) rear left of semi-trailer, 6) rear of semi-trailer, 7) rear right of semi-trailer, 8) centre right of semi-trailer, 9) right side of tractor, 10) inside the cab.
Key Rules
- ✓Inspect top to bottom, left to right, and front to back
- ✓Keeping the circle check report and applicable list(s) of defects on board the vehicle is mandatory
- ✓Adapt the method to the vehicle's braking, coupling, steering and emergency equipment
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Steps 9-10 - Right Side of Tractor and Inside Cab
combination On the passenger side of the tractor check parking lights, right turn signal, body, coupling mechanism, side rails/cross members, suspension, tires/valves, wheels/fasteners, wheel bearing leaks, fuel tank and filler cap, exhaust, passenger door, and mirror. Close and latch the hood (passenger side first, then driver side). Inside the cab, adjust and check the driver's seat and seat belt, then turn key to ON and check steering wheel/column, horn, mirrors, windshield, wipers, washer, blowers/vents, side windows, emergency equipment, and the braking system per the applicable section.
Key Rules
- ✓Latch the hood on the passenger's side first, then the driver's side
- ✓Check driver's seat (13.1), seat belt (13.A), steering (5.A, 5.1), horn (4.2), windshield (11.1) and wipers (6.A, 6.1)
- ✓Check the turn signals by activating the left turn signal and verifying front, tractor rear and semi-trailer rear signals