Purchasing a second hand truck in South Africa is a major investment — whether you're running a logistics fleet, a construction company, or expanding your transport business. Unlike buying a passenger car, commercial vehicles come with complex mechanical systems, high mileage histories, and substantial repair costs if something goes wrong after the sale.

At Boschies CC in Jet Park, Gauteng, we've been buying and selling second hand trucks for over 30 years. Here's the exact checklist our own team uses when evaluating a used truck — and what you should check before handing over any money.

1. Full Service History & Documentation

The first thing to ask for is the truck's full service history. A legitimate seller should be able to provide a service book, invoices from registered workshops, and a clear record of maintenance intervals. Trucks with gaps in their service history are a red flag — it often means the vehicle was neglected or used very hard without proper upkeep.

Also verify the registration papers, roadworthy certificate, and chassis/VIN number. Cross-check the VIN plate on the truck against the title documents to ensure they match. In South Africa, stolen truck frames with cloned papers are unfortunately not uncommon.

2. Engine Health

Start the engine cold if possible. A healthy diesel engine should start without excessive cranking, and there should be minimal smoke on startup. Watch for:

• Blue smoke — burning oil, worn rings or turbo seals
• Black smoke — over-fuelling, injector issues, air filter problems
• White smoke — coolant entering the combustion chamber, potential head gasket failure

Listen for knocking, rattling, or hissing sounds. Check the oil filler cap for a white milky residue — this indicates water contamination, often from a blown head gasket.

3. Transmission & Gearbox

Take the truck for a test drive and run it through every gear — both up and down. Gearboxes on commercial trucks are expensive to rebuild or replace. Check for:

• Difficulty selecting gears or gear slipping
• Unusual grinding or crunching sounds
• Excessive play or noise in the gearstick

For automated or automatic gearboxes (common on newer MAN, Volvo, and Mercedes trucks), ensure the electronic control unit (ECU) shows no fault codes.

4. Chassis & Frame Integrity

Crawl underneath and inspect the chassis rails closely. Look for cracks, repairs, or signs of welding. Welded chassis repairs are not automatically disqualifying — professional repairs done to spec are acceptable — but they need to be disclosed and properly documented.

Check for rust or corrosion on the frame, especially on trucks that operated in coastal areas (KwaZulu-Natal, Western Cape) or were used for water bowser applications.

5. Braking System

South African law requires commercial vehicles to pass a roadworthy brake test. Ask for the latest brake test certificate and check when it was issued. Test the brakes on a quiet road — they should engage firmly and pull the vehicle to a straight stop without pulling to one side.

Inspect the brake drums, discs, and pads where visible. Check air brake lines for cracks, leaks, or brittle rubber. Air leaks in the brake system are a safety emergency and an expensive repair.

6. Tyres & Wheel Condition

Commercial truck tyres are expensive — budget R5,000 to R18,000 per tyre depending on size and brand. Check the tread depth across all positions including the steer axle, drive axles, and trailer positions. Uneven wear patterns indicate misalignment or suspension issues.

Inspect the rims for cracks or bends. Check the wheel studs and ensure none are missing or damaged. Re-torquing and wheel nut issues are a common cause of roadside incidents in South Africa.

7. Cab & Electrical System

Don't underestimate cab condition. Check that all lights work — headlights, indicators, reverse lights, marker lights, and interior cab lights. Test the dashboard instruments: speedometer, rev counter, air pressure gauges, temperature gauges, and warning lights.

Check the air conditioning (vital in South Africa's heat), windscreen wipers, electric windows, central locking, and any driver assistance systems. Electrical fault-finding on commercial vehicles is time-consuming and costly.

8. Suspension & Steering

Bounce each corner of the truck and watch for slow, controlled dampening — not continued bouncing, which signals worn shock absorbers. Inspect leaf springs for broken or cracked leaves. Check U-bolts and spring hangers for wear.

Turn the steering wheel through its full lock in both directions. There should be minimal play before the wheels start to turn. Excessive play means worn kingpins, tie rod ends, or a worn steering box — all of which affect driver fatigue and vehicle safety on long hauls.

9. Mileage vs. Engine Hours

On South African trucks, mileage can be misleading. A truck that has done 800,000 km on highways in good condition may be in better shape than one that has done 400,000 km on sugar cane hauls or in mining applications. Ask about the truck's typical operating environment and payload.

Many modern trucks also track engine hours — this is a more accurate indicator of wear than kilometres alone, especially for trucks used in construction or quarrying where the engine runs for extended periods while stationary.

10. Get an Independent Pre-Purchase Inspection

Before signing anything, pay for an independent inspection from a qualified diesel mechanic or a specialist like an accredited MAN, Mercedes, Hino, or Volvo dealer. This typically costs R1,500 to R3,000 and can save you R100,000+ in hidden repairs.

A trustworthy seller — like us at Boschies CC — will never refuse an independent inspection. If a seller is reluctant to allow one, walk away.

Ready to Buy a Quality Second Hand Truck?

At Boschies CC in Jet Park, every truck in our yard has been carefully inspected by our experienced team. We stock 278+ second hand trucks including truck tractors, tipper trucks, dropside trucks, flatbed trucks, concrete mixers, water bowsers, buses, and trailers.

We serve buyers across Gauteng, Mpumalanga, KwaZulu-Natal, Limpopo, and all South African provinces. Visit us at 39 Bisset Street, Jet Park, or call 083 276 0810 to speak with Gerrie directly.