Every 3 months Every 6 months Every 12 months Every 500 hours Every 1000 hours Every 2000 hours I I M I t t t t +- t +- t +- t +- t Oil pump Oil leak and abnormal sound I t t t Hydraulic oil tank Oil level and contamination Tank and oil strainer Oil leak I I t t t C 4- t + C Control lever Loose linkage Operation I I + +- + + +- t Oil control valve Oil leak Relief pressure measurement Relief valve and tilt lock valve functions I I t t t t t M t Hydraulic piping Oil leak Deformation and damage Loose joint I I T +- + t t t +- +- t t ELECTRICAL SYSTEM lgnition timing Cracks on distributor cap Spark plug burning and gap Distributor side terminal burning Distributor cap center piece wear and damage Plug cord internal discontinuity Ignition timing I I I I t t +- t t t t t M t t +- +- I + Starting motor Pinion gear meshing status I t t t Charger Charging function I 4- t t Battery Battery fluid level Battery fluid specific gravity I +- +- M t c Electrical wiring Damage of wiring harness Fuses I I t t e t t t