TM 5-6115-630-14&P Table 4-1. Unit Preventive Maintenance Checks and Services (PMCS) (cont). Item no. 18 19 20 21 22 23 24 H - Hours of operation M – Monthly (As  indicated) (100  hours) S – Semiannually A – Annually (500  hours) (1000  hours) Interval H M s l l l l l l l l l A l Item to be inspected Data  Plates  and  Markings Support  Leg  Assembly Rear  Leg  Prop  Assembly Suspension   Assemblies Axle Wheels  and  Tires Brakes Procedures Make sure data plates are legible and secure. Replace  illegible  data  plates  (page  4-236, TM 9-2330-202-14&P). Inspect  brackets  and  leg  for  bent  or  broken  parts. Inspect  bracket  and  leg  prop  for  bent  or  broken parts. a. b. c. a. b. a. b. a. b. c. d. Inspect  shackles,  bearings,  pins,  leaf  springs and spring eyes for damage or broken parts. Inspect  mounting  brackets  for  cracks  or  loose or  missing  hardware. Inspect  shock  absorbers  for  damage  or  leaks. Check  for  damaged  axle  tube. Check for loose or missing U-bolts or nuts. Check  serviceability  of  tires  as  indicated  in TM 9-2610-200-24. Tighten  wheel  stud  nuts. Inspect brake linings for wear. Replace if brake shoe lining is less than l/8-inch (3.2  mm)  thick  (page  4-140, TM 9-2330-202-14&P). Inspect  brake  adjusting  screw,  retaining  screw, retaining pins, springs, and clips for corrosion and  wear. Inspect  hydraulic  wheel  cylinders  for  leaks. Adjust  brake  (page  4-154, TM 9-2330-202-14&P). 4-11