Vehicle Standards Bulletin 6 (VSB6)

Vehicle Standards Bulletin 6 (VSB6) V3.2: National Code of Practice Heavy Vehicle Modifications is the national standard for the most common modifications made to heavy vehicles. Under the NHVR Code of Practice for the Approval of Heavy Vehicle Modifications (PDF, 506KB) the NHVR has set VSB6 as the primary standard used by Approved Vehicle Examiners (AVEs) to approve modifications to heavy vehicles.

VSB6 V3.2 Introduction (PDF, 708KB)

Section A - Engines (PDF, 2.9MB)

Section B - Transmissions (PDF, 934KB)

Section C - Tail Shafts (PDF, 1.4MB)

Section D - Rear Axles (PDF, 624KB)

<Section E - Front Axle Steering Wheels & Tyres (PDF, 3.3MB)

Section F - Suspension (PDF, 1.4MB)

Section G - Brakes PDF, (7.1MB)

Section H - Chassis (PDF, 7.8MB)

Section J - Body Mounting (PDF, 2.7MB)

Section K - Cabin (PDF, 3.5MB)

Section M - Fuel Systems (PDF, 588KB)

Section P - Tow couplings (PDF, 2.9MB)

Section R - Vehicle Mounted Lifting Systems (PDF, 2.3MB)

Section S - Vehicle Rating (PDF, 7.2MB)

Section T - Tow Trucks (PDF, 2.2MB)

VSB6 additional resources