
How to Use Hitches on Platinum Camper Trailers (Standard Hitch Coupling & DO35 3.5T Hitch Coupling)
Key Takeaways Introduction The hitch coupling is the single most critical connection between your tow vehicle and your camper trailer. Get it wrong, and you risk a dangerous separation on the road. Get it right, and you’ll tow with confidence across any terrain Australia throws at you. Platinum Camper trailers are fitted with either a standard 50mm ball coupling or the DO35 3.5T hitch coupling, depending on the model and its gross trailer mass. This guide explains exactly how each system works, how to connect and disconnect safely, and which hitch suits your setup. Whether you’re towing a lightweight Cadet SE to a coastal campground or hauling a fully loaded Commander Hybrid through corrugated outback tracks, this article covers everything you need. Hitch Systems on Platinum Camper Trailers Platinum Campers equips its trailers with hitches rated to match each model’s weight class and intended terrain. There are two systems you’ll encounter across the range. Standard Hitch Coupling (50mm Ball Coupling) is the most common trailer coupling in Australia. It clamps onto a standard 50mm tow ball fitted to your vehicle’s tow bar. This coupling is rated for trailers with an ATM up to approximately 2,000–2,500 kg, making it suitable for lighter soft floor and hard floor models like the General S4, Chase S5, and Quest E1. DO35 3.5T Hitch Coupling is a heavy-duty, off-road-rated coupling designed for trailers with an ATM up to 3,500 kg. Instead of clamping onto a ball, the DO35 uses a pin-and-coupling mechanism that locks onto a specialised receiver mounted to your vehicle. It provides greater articulation (360-degree rotation), improved shock absorption, and a more secure connection on rough terrain. This coupling is standard or optional on heavier models such as the Chariot E1, Discovery E1, and Commander Hybrid. According to Couplemate, the DO35 coupling reduces lateral stress on the tow bar by up to 50% compared to a standard ball coupling, which significantly lowers wear on both the vehicle and trailer chassis over extended off-road use. Quick Comparison: Standard vs DO35 Hitch Coupling Feature Standard 50mm Ball Coupling DO35 3.5T Hitch Coupling Max ATM Rating Up to ~2,500 kg Up to 3,500 kg Connection Type Clamps onto 50mm tow ball Pin locks into dedicated receiver Articulation Limited vertical/horizontal 360-degree rotation Off-Road Suitability Moderate Excellent Shock Absorption Minimal Built-in dampening Vehicle Requirements Standard 50mm tow ball and tow bar DO35-compatible hitch receiver Typical Platinum Models Cadet SE, General S4, Chase S5, Quest E1 Chariot E1, Discovery E1, Commander Hybrid Ease of Connection Simple clamp-and-lock Pin insertion and latch How to Connect a Standard 50mm Ball Coupling Connecting a standard coupling is straightforward, but rushing the process is where most mistakes happen. Follow these steps every time. Step 1: Position your vehicle. Reverse your tow vehicle so the tow ball is directly beneath the trailer’s coupling head. Use a spotter if possible. The coupling should be slightly above the ball height. Use the jockey wheel to adjust height as needed. Step 2: Lower the coupling onto the tow ball. Release the coupling latch (lift the handle), then wind down the jockey wheel until the coupling sits fully over the tow ball. You should hear or feel a distinct “click” as the latch engages. Step 3: Lock the coupling. Push the latch handle down firmly until it locks into position. Visually confirm the latch is fully closed. Many standard couplings have a locking pin or clip that prevents the handle from bouncing open during travel. Insert this pin every time. Step 4: Attach safety chains. Cross the safety chains under the coupling in an X pattern and attach each chain to the designated anchor points on the tow bar. According to Australian Standard AS 4177.4, safety chains must be rated to the trailer’s ATM and must be short enough to prevent the drawbar from hitting the ground if the coupling fails, but long enough to allow full turning. Step 5: Connect the electrical plug. Plug in the 7-pin or 12-pin flat connector to power your trailer’s lights, brakes, and any auxiliary systems. Test all lights (indicators, brake lights, tail lights) before departure. Step 6: Connect the breakaway cable. Attach the breakaway cable to a separate anchor point on the tow bar (not to the safety chains). This cable activates the trailer’s electric brakes if the trailer separates from the vehicle. Step 7: Retract the jockey wheel. Wind the jockey wheel fully up and secure it in the retracted position. A dangling jockey wheel can dig into the ground during off-road travel. Step 8: Final check. Push and pull the trailer drawbar firmly. It should not lift off the tow ball. Walk around and confirm chains, electrics, breakaway cable, and coupling lock are all secure. For a comprehensive instructions for connecting a tow ball to the hithc, see this video below. How to Connect a DO35 3.5T Hitch Coupling The DO35 system requires a compatible hitch receiver on your vehicle, which replaces the standard tow ball. If your Platinum Camper is fitted with a DO35 coupling, make sure your vehicle has the matching receiver installed before your first trip. Step 1: Inspect the receiver. Check that the hitch receiver pin hole and locking mechanism are clean and free of debris. A dirty receiver can prevent the coupling from seating properly. Step 2: Align the trailer. Reverse your vehicle until the receiver is directly below the trailer’s DO35 coupling head. Use the jockey wheel to raise or lower the coupling to align it with the receiver. Step 3: Lower and engage. Wind the jockey wheel down so the coupling drops over the receiver pin. The DO35 coupling will click into the locked position automatically when seated correctly. You’ll feel a firm engagement and hear the latch close. Step 4: Verify the lock. Check the coupling’s visual indicator. Most DO35 units have a green/red indicator or a clearly visible latch position that confirms whether the coupling is locked. Give the drawbar a firm push and pull to test. The coupling


