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Boattrailers

Adjustment

  We recommend that the first time you use your boat trailer you allow plenty of time for trimming the trailer and boat to make them match correctly.

 Time spent on this will be recouped many times over because future loading and unloading will be quick and easy.

 Your Brenderup dealer will be pleased to help with advice and guidance.

 If the adjustment requires the wheel axle to be shifted, the brake rod must also be reset.

 Here are some useful tips on adapting the trailer to your boat:






 

The weight and length of the boat must match the boat trailer

The boat’s weight and length specifications are important.
The weight is important in relation to the trailer’s working
load. Remember to add the weight of any equipment, engine
and petrol to the boat’s deadweight.

The length must also be correct to avoid overloading the hull.

According to boat manufacturers, the maximum distance from the rear keel roller to the end of the hull must be 80 cm.

It may be tempting to use the boat as a huge car boot, but make sure the trailer does not get overloaded. If you are in doubt about total weight we recommend you test-weigh it, for instance at a public weighbridge.
 

The boat must rest on its keel and be supported by the side supports/super-rollers

 To avoid overloading the boat hull and ease loading and unloading of the boat, it must rest on the keel roller and be supported by the side supports/super-rollers.

 Here is how to adjust the boat trailer correctly: 










 

Adjustment of boattrailers without superrollers

Ordinary rollers

Side supports

  In principle the rear side supports should be mounted as far back on the chassis as possible, and the front side supports positioned where they can provide the boat with the greatest support.

 The height of the side supports is in the lowest position.

 Pull up the boat and adjust the keel rollers:

  Pull up the boat onto the trailer using the winch. To obtain the  optimum centre of gravity, the distance between the boat’s hull and the mudguards must be as small as possible, preferably 20-30 mm.

If necessary unload the boat again and adjust the keel roller to the correct height.

If the boat is flat-bottomed, adjust the keel rollers up around their top position.

Adjust the side supports to support the boat:

· Straighten up the boat with the side supports. The distance from the hull down to the mudguards must be the same on both sides. If necessary, use a jack to lift the side supports into place. Under no circumstances may the side supports lift the boat from the keel roller.
 

Super-rollers

Side supports and super-rollers

 If the boat’s rear hull is flat, the super-rollers should in principle be mounted as close to the chassis as possible and the keel rollers adjusted upwards to near their top position.

 Position the forward side supports where they will best support the boat in their lowest position.

 Pull the boat up with the winch and check that the boat is resting on its keel:

· Pull the boat up onto the trailer using the winch.

The distance between the boat’s hull and the mudguards must be as small as possible, preferably 20-30 mm. If necessary unload the boat again and adjust the keel roller to the correct height.

Adjust the super-rollers to the correct height:

 The boat must not rest on the super-rollers, but instead on the keel rollers.

When the distance between the mudguards and the boat’s hull is correct, adjust the super-rollers to the correct position. Raise the front side supports up to the boat’s hull, using a jack if necessary.