TM 5-3825-230-14&P Table 4-1.  Unit Preventive Maintenance Checks and Services Q - Quarter S - Semiannually A - Annually Item Interval Item to Be No. Q S A Inspected Procedure ENGINE ENCLOSURE 1 • a.  Check for dents, cracks and general damage. • b.  Check for missing or loose nuts, screws and washers.  Tighten as necessary. ENGINE 2 • Oil Filter Replace initially at 150 hours of operation and 300 hours of operation thereafter (para 4-22). FUEL SYSTEM 3 • Fuel Tank Check for cracks, leaks, missing parts, and dents. 4 • Fittings, Joints Check for cracks, leaks and dents. and Valves 5 • Fuel Filter Replace on a quarterly basis or after 300 hours of operation (para 4-48). HYDRAULIC SYSTEM 6 • Hydraulic Lines Check lines for leaks, kinks, cracks, dents, and for deteriorated rubber on flexible hoses. 7 • Fittings Check for leaks, kinks, cracks, or dents. 8 • Hydraulic Pump Check for leaks. 9 • Reservoir a.  Check reservoir for leaks. b.  Check filler cap for proper seal. 10 • Breather Cap should be present and not be cracked or dented.  Check filter for dirt or clogging.  Clean per para 4-104. 11 • Controls Check for proper operation. 12 • Hydraulic Filter Replace initially at 150 hours of operation and 300 hours of operation thereafter (para 4-22). 4-7