According to general assembly guides for this model type, the process follows these primary steps: Base Assembly
You can access diagrams and part lists (which serve as a visual assembly guide) at these sites: Sears PartsDirect - DP Trac 20 Assembly Instructions Dp Dual Trac 20 Manual Pdf
While a single PDF for the "DP Dual Trac 20" manual is not universally hosted in one location, you can find the complete assembly steps and parts diagrams through specialized fitness equipment resources. The DP (Diversified Products) Dual Trac 20 is an older home gym system often cross-referenced with the Lifestyler 15666-DUAL TRACK 20 Assembly Steps Summary According to general assembly guides for this model
: Attach arm padding and end caps. Ensure all swinging pieces move freely without excessive resistance. Manual and Parts Resources Assembly Instructions Dp Dual Trac 20 Manual Pdf