TM 5-4320-215-12 Inspection Service Quarterly ENGINE-Continued 76 76 Tires.  Inspect tires for breaks, deterioration, and improper tire pre- sure. 76 Repair or replace a defective tire (par.  61).  Inflate tires to proper tire pressure.  Correct tire pressure is 45 psi. 77 77 Lunette.  Inspect the lunette for loose or missing mounting hardware. 77 Tighten or replace all loose or missing mounting hardware.  Replace a defective lunette (par.  58). 78 78 Wheels.  Inspect the wheels for insecure mounting hardware and improp- er lubrication. 78 Tighten all loose mounting hardware.  Replace a defective wheel (par. 61). 80 80 Frame.  Inspect for misalinement, loose or missing hardware, cracked or broken welds, and other signs of damage.  Inspect the lifting bail for damage. 80 Tighten or replace all loose or missing mounting hardware.  Replace a defective lifting bail (par.  58).  Report a defective frame to field maintenance. 84 84 Hood, panels, and doors.  Inspect for dents, cracks, breaks, or other damage.  Inspect for loose or missing mounting hardware. 84 Tighten or replace all loose or missing mounting hardware.  Refer to TM 5-2805-209-12 and correct all deficiencies noted. CENTRIFUGAL PUMP 136 136 Cart foot.  Inspect the cart foot for insecure mounting, misalinement, or other evidence of damage.  Inspect the pin and securing handle for damage or improper operation. 136 Replace a defective cart foot (par.  57). 183 183 Impeller.  Inspect the impeller for insecure mounting, cracks, breaks, and improper clearance. 188 Tighten a loose mounting.  Adjust the clearance between the suction head and impeller (par.  44).  Replace a defective impeller (par.  44). 184 184 Oil seal.  Inspect the mechanical seal for evidence of leakage (par.  44). Inspect the suction flange and suction head for defective gaskets. 184 Replace a defective mechanical seal (par.  44).  Replace a defective sue tion flang or suction head gasket. 185 185 Pump housing.  Inspect chamber for cracks, breaks, misalinement, and loose or missing mounting hardware. 185 Tighten or replace all loose or missing mounting hardware.  Replace a defective chamber (par.  44). Section III.  TROUBLESHOOTING 34.  General This     section     provides     information     useful     in diagnosing   and   correcting   unsatisfactory   operation   or failure  of  the  pumping  unit  and  its  components.    Each trouble symptom stated is followed by a list of probable causes of the trouble. The possible remedy recommended is described opposite the probable cause. Any   operational   trouble   that   is   beyond   the   scope   of organizational  maintenance  must  be  reported  to  field maintenance, 3d echelon. 35.  Engine Troubleshooting For  engine  troubleshooting,  refer  to  TM  5-2805- 209-12. 29