STEP 5
1. Fix Backrest pad (27) to Backrest frame (10) with Hex bolt (25) and Flat washer (22) .
2. Assembly Chin-up bar (11) to Top upright frame (3) tightly with Hex bolt (29),Flat
washer(22) ,Nylon nut (30) and cover the Square end plug (28) at last.
2019-2020