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MAINTENANCE PERIODIC REPLACEMENT OF SAFETY CRITICAL PARTS SAFETY CRITICAL PARTS 4 - 16 Safety critical parts for periodic replacement Replacement interval Fuel hose (fuel tank - fuel pre-filter) Every 4000 hours or 2 years, whichever comes sooner Fuel hose (fuel pre-filter - priming pump) Fuel hose (fuel supply pump - fuel tank) Spill hose (engine output connector - fuel tank) Water separator (case, O-ring, plug) Rubber hose for brake piping High-pressure hose in steering hydraulic circuit (pump ←→ flow amp ←→ steering cylinder) High-pressure hose in hoist hydraulic circuit (pump ←→ flow amp ←→ hoist valve ←→ hoist cylinder) 9 Hose at discharge side of retarder cooling pump 10 Hose at discharge side of transmission pump 11 High-pressure hose in brake control circuit (pump ←→ brake filter ←→ accumulator charge valve ←→ accumulator) Every 2000 hours or 1 year, whichever comes sooner 12 Brake valve parts 13 Parking brake valve parts 14 Accumulator charge valve parts 15 Retarder control valve parts 16 Parking brake chamber parts 17 Slack adjuster parts 18 Seat belt Every 3 years Replace