DIY TRAILER KITS
6X4 TRAILER BUILD PLANS
THIS KIT IS DESIGNED FOR AN UN-BRAKED - 749KG GTM TRAILER
Lay out the chassis ensuring all corners are smooth and square.
Weld around all joins to prevent water or moisture entering into the RHS.
Use a grinder to smooth of the top welds so that the floor will sit flush.
*FOR BRAKED TRAILERS USE 50mm x 50mm x 2.5mm RHS.
When placing the spring hangers, ensure the axle is slightly rearward from the centre of the chassis (100mm). This will ensure correct ball weight when towing.
Different spring sets will have different spring hanger placements.
For correct spring hanger measurements,
Remember to only weld down the sides of the spring hangers and never across the drawbar.
NOTE: Always double check your spring measurements with staff before welding.
Attach the drawbar to the trailer by welding along each side where it meets the chassis.
Ensure there are enough welds to hold the drawbar on strongly as it undergoes a lot of strain.
NEVER weld across the top or bottom of the drawbar as it creates a weak point in the RHS.
CLICK TO ENLARGE
FLIP THE TRAILER
5. COUPLING PLATE
When positioning the coupling plate, ensure the plate is offset forward to allow room for the coupling bolts.
The coupling bolts should go through the coupling and plate only,
Weld down each side of the coupling plate only.
6. SAFETY CHAIN
ONLY use rated safety chain (Stamped every few links).
Attach the chain in such a way that no part of the chain will come in contact with the road if the trailer disconnects. (Not pointing down).
At least 50% of the first link must be welded to the trailer (Inside and outside of the link)
CHAIN REQUIRED: 1x 1600KG SAFETY CHAIN
7. SPARE TYRE MOUNT
Weld a spare wheel mount using angle iron.
When mounting the spare tyre, remember to allow room for your jockey wheel handle to spin.
Cross brace the mount back to the trailer chassis to prevent vibration.
Drill a 1/2" hole where required and weld the nut onto the angle iron.
Remember to use a large washer to prevent damaging the rim.
STEEL REQUIRED: 40mm x 40mm x 5mm ANGLE IRON
8. BODY & CORNER PLATES
Before mounting the body, ensure the welds on top of the chassis have been ground down flat so that the body doesn't sit up and leave a big gap.
Tack the body together down the centre joint (from underneath) and ensure it is square.
Place the body onto the chassis and line it up straight.
ADD YOUR AXLE, HUBS & WHEELS BEFORE INSTALLING YOUR WHEEL GUARDS
9. WHEEL GUARDS
When installing your wheel guards, it is important to ensure you have enough clearance for the suspension and wheels to move around when driving.
100mm clearance is required above the wheel to prevent scrubbing.
also remember the wheel will always travel backwards when the suspension compresses so make sure there is a little bit of extra room between the back of the wheel and the guard.
The front of the guard will generally line up with the front of the spring hanger.
10. TAIL GATES
Weld the angle iron onto the folded gate using 40mm stitches.
Weld along the top and bottom of the angle iron for added strength.Next, weld in the tie down rail 120mm from the top or at your desired height.Weld in a tab between the rail and the tail gate (dead centre) for added strength.STEEL REQUIRED:
- ROLLED TAIL GATE x2
- 2x 40mm x 40mm x 5mm ANGLE IRON (per gate)
- 1x TIE DOWN RAIL (per gate)
Tack your hinges approximately 230mm in from the outer edge of the gate. Ensure your gates open & shut nicely before fully welding the hinges into place.
REMEMBER TO PRIME ALL WELDS
ADELAIDE TRAILER SHOP.COM TAKES NO RESPONSIBILITY FOR THE OVERALL PRODUCT BEING BUILT.
IT IS THE MANUFACTURERS RESPONSIBILITY TO ENSURE THE TRAILER IS BUILT TO STANDARD AS PER VSB1.