TM 5-6115-593-12 TO 35C2-363-1 d. Inspect gasket (2, figure 3-1), dust cap (13) and O-ring (14) for damage. e. Remove and empty dust cap (13). f. Inspect air cleaner for loose induction system connections. 3-13. MAINTENANCE OF RADIATOR ASSEMBLY. a. Inspection.  (See figure 4-27.) (1)   Inspect radiator core, sight glass,    piping,    and    hose connections for leaks. (2)   Inspect hoses for leaks. (3)   Inspect motor for evidence of overheating and loose mounting. (4)   Inspect fan belt guard and fan guard for loose mounting. (5)   Remove  fan  guard  mounting nuts  and  fan  guard,  figure  4- 28.   Inspect fan belt for tears, breaks, or frayed edges. (6)   Check fan belts to see that they   do   not   move   more than    1/2    inch    (12.7mm) when applying pressure with     the     thumb     against each belt (see figure 4-1). (7)   Reinstall fan guard and mounting screws and nuts. b. Service.  Service the radiator as follows: WARNING Remove radiator cap slowly to permit pressure to escape prior to removal of cap. (1)   Check coolant level at sight glass.  If low, remove cap and add coolant. (2)   Check coolant strength with a hydrometer for winterization protection.  If weak, add same type of coolant presently in radiator. Refer to table 3-1 for proper coolant. (3)   Open radiator cap access door on top of unit and fill radiator until coolant level is 2 inches (51 mm) below filter neck (center of sight glass). (4)   Fasten tag near radiator cap indicates date, type   of   coolant,   and   level   of   protection. Replace cap and close access door. 3-14. MAINTENANCE OF FUEL LINES AND FITTINGS.    See  figure  4-29  and  inspect  all  fuel  lines and fittings for loose connections, leaks, and breaks. 3-15. MAINTENANCE  OF  FUEL  TRANSFER  PUMP ASSEMBLIES. a. Inspection.  See figure 3-2 and inspect fuel transfer pump for leaks at elbows, connectors, drain cocks, and filters.  Tighten as necessary. Inspect motor for overheating indications. b. Service.  Service the filter and strainers as follows (see figure 4-31): (1)   Remove screw (24), washer (25), large can (26), and filter element (27) in can and install with gasket (28), washer (25), and screw (24). Tighten securely. Replace gasket (28) if defective. (2)   Remove nut (30), washer (31), small can (32), and metal strainer (33). Replace strainer and tighten strainer assembly with nut (30).  Removal and replacement of both strainers are the same. 3-16. MAINTENANCE OF FUEL TANK ASSEMBLY. (See figures 4-33, 4-34, and 4-35) a. Fuel Level  Switches. (1)   Inspect the wires to the switch for secure connection. (2)   Inspect, for loose terminals or other signs of damage. (3) If defective, refer to next higher maintenance. 3-12