Every 3 months Every 6 months Every 12 months Every 500 hours Every 1000 hours Every 2000 hours Brake drum and brake shoe Clearance between drum and lining Wear of shoe sliding portion and lining Drum wear and damage Shoe operating condition Anchor pin rusting Return spring fatigue Automatic adjuster function M t t t I I I I M I Backing plate Deformation, cracks and damage Loose mounting I T MATERIAL HANDLING SYSTEM Forks Abnormality of fork and stopper pin Misalignment between left and right fork fingers Cracks at fork root and welded part I I t t +- +- + +- I*' Mast and lift bracket Deformation and damage of each part and crack at welded part Mast and lift bracket looseness Wear and damage of mast support bush Wear, damage and rotating condi- tion of rollers Wear and damage of roller pins Wear and damage of mast strip I I I I t +- t t t t t +- t t I t 1 t chain and chain wheel Tension, deformation and damage of chain Chain lubrication Abnormality of chain anchor bolt Wear, damage and rotating condi- tion of chain wheel I I I I t +- t t t t t t.
t + t t Various attachments Abnormality and mounting condition of each part I t 4- t HYDRAULIC SYSTEM Cylinder Loosening and damage of cylinder mounting Deformation and damage of rod, rod screw and rod end Cylinder operation Natural drop and natural forward tilt (hydraulic drift) I I I M t t 4- t t t +- t 4- 4- + t