. MAINTENANCE MAINTENANCE PROCEDURE MAINTENANCE MAINTENANCE PROCEDURE 4 - 34 2. Loosen p lug (1) g radually t o release the grease. 3. When loo sening plug (1), tu rn it a maximum of o ne turn. 4. Fit the ste el pipe s inside th shoe, r otate the sprocket in r everse , so tha t the steel pipes make the rubb er shoe come up from t he idler, then to th e side to remove Rubber Shoes Installation 1. Raise the chassi s with the boom and When doi ng this, operate th e levers slowly. 2. Mesh the rubber shoe with t he sprocket and fit it over the idler. 3. Rotate th e sprocket in shoe an d stop