Step 1.
Choose A Pair Of Suitable-Sized Discs. Place The Top Disc (Bigger Hole) And Bottom Disc (Smaller Hole) Into Both Ends Of The Coil Spring.
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Step 2.
Insert The Compressor Rod And Make Sure The Rod And Plates Are Interlock Firmly With Each Other.
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Step 3.
Fasten The Rod By A 19 Mm Wrench Drive Until The Spring Is Well Compressed.
Do Not Use Air Tools.
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Step 4
Release The Spring Carefully And Install A New One.