TM 5-4930-244-14 TABLE 2-1.  OPERATOR PREVENTATIVE MAINTENANCE CHECKS AND SERVICES FOR: LUBRICATING AND SERVICING UNIT, MODEL PM92-133 Location Not Fully Item Item to Mission No. Interval Check/Service Procedure Capable if: 1 Before Wheel & Tire Check tires (4) for correct pressure of 60 Tire low or flat. Assembly psi.  Inflate tires if needed.  (Figure 2-23.) Inspect tires (4) for cuts or worn tread. Tires cut or have excessive tread wear. Chocks blocks missing. 2 Before Diesel Engine Check diesel engine (12) for leaks or Engine is leaking or cracks.  (Figure 2-14.) cracked. 3 Before Compressor & Check belts (3) for tension. Belt is loose, damaged or Alternator Belts broken. 4 Before Shut-Off Valve Inspect shut off valve (7) for damage or Valve damaged or leaks. leaking. 5 Before Fuel Tank Inspect fuel tank (1), fuel strainer (2), and Tank cracked open or fuel lines (3) for cracks, leaks, or damaged, or fuel strainer damage.  (Figure 2-15.) or fuel lines leaking. 6 Before Fuel Cap Inspect fuel cap (1) for proper fit.  Replace Cap is missing or if needed.  (Figure 2-16.) damaged. 7 Before Fuel Neck Inspect fuel hose (2) for cracks or Hose cracked or Assembly deterioration. deteriorated. WARNING Battery  acid  is  harmful  Wear  safety  glasses  and  rubber  gloves.  If  acid  touches eyes or skin, flush with running water for 60 seconds. Seek medical attention. 8 Before Battery Box Check battery electrolyte (2), and fill to Electrolyte is too low to ring at bottom of fill hole.  (Figure 2-17.) charge. Check battery cables (3) in drawer for Battery cables are loose. secure connections. 9 Before Air, Lube and Check hoses (8) for secure connections. Hoses have loose Grease Hoses connections. 10 Before Brake & Tail Check lamps (1) for broken bulbs and Lamps / bulbs broken or Lights illumination.  (Figure 2-18.) do not illuminate. Check wire connections (2). Wires are exposed or damaged. 2-13