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The standard tandem centre hanger is fitted to standard 60mm hanger springs.
This Alko centre hanger has an 18mm Rounded Head greasable shackle pin. This bolt is tack welded around the head after insertion.
Experienced trailer builders weld this hanger approximately 150mm backwards of the centre.
Front and rear hanger centres are 825mm from the centre of the middle hanger.
Trailer builders installing springs for the first time are encouraged to install hangers onto 60mm x 60mm piece of angle, approximately 2 meters long.
Repeat the procedure above and then u-bolt into position under the trailer coupling weight is between 5% and 7% of the desired trailer ATM.
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