Every 1 3 6 12 Months Every 170 500 1000 2000 Hours Brake drum and brake shoe Clearance between drum and lining Wear of shoe sliding portion and lining Drum wear and damage Shoe operat~ngc ondition Anchor pin rusting Return spring fatique Automatic adjuster function M + - + + 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 l I C + t t + 1 *3 ~ Mast and fork 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 consdition of rollers Wear and damage of roller pins Wear and damage of mast strip I lI - I C +' -+ - C ; -I + + C + I Chain and chain wheel Tension, deformation and damage of chain Chain lubrication Abnormality of chain anchor bolt Wear, damage and rotating condition of chain wheel I l i I C t t C C t t + + C C C Various attachment Abnormality and mounting condition of each part I + - - 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) T I I M t C + t C + + C t C C