1. Install the large o-ring on the threaded nipple on the bottom of the Filter Adapter.
2. Using a little diesel fuel, lubricate the filter gasket and thread the fuel filter onto the filter adapter by hand. Once the filter is on the adapter hand tight tighten the filter one additional complete turn, using a pair of strap wrenches. It is helpful to put a mark on the filter to know when you have complete one full turn.
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