TM 9-2320-386-10 Change 1 2-7 2-3. CHASSIS CONTROLS AND INDICATORS (Contd) Key Item and Function 5 Surge tank cap is removed to add coolant. 6 Sight tube is checked to ensure coolant is at its proper level. 7 Battery filler caps are removed to check battery fluid level. Key Item and Function 8 Winch oil reservoir cap is removed to add oil. 8.1 Winch pressure dial indicator gauge shows if oil filter needs changing. 9 Winch oil reservoir AOAP valve is opened to sample oil. 10 Winch oil reservoir drainplug is removed to drain oil. 11 Winch oil reservoir sightglass is checked to ensure oil is at proper level. 5 6 7 8 11 10 9 8.1 RED ZONE YELLOW ZONE GREEN ZONE