TM   5-3805-258-24-1 LUBRICATION  AND  MAINTENANCE  CHART Item Service Lube.      Page WHEN   REQUIRED Differentials and Final Drives Inspect  lubricant  level  if  leakage  develops CD/TO-2 1-17 or is suspected. WARNING If NBC exposure is suspected, all air filter media should be handled by personnel wearing protective equipment.  Consult  your  unit  NBC  Officer  or  NBC  NCO  for  appropriate  handling  or  disposal instructions. Engine Air Intake System Service when indicator locks in RED posi- I 1-18 tion. , , , Engine Air Precleaned Clean precleaned — inspect exhaust con- 1-23 nections, if air cleaner needs frequent ser- vicing. I I I 1 1 1 Cooling System Drain and clean when engine overheats or 1-24 solution is dirty, Fuel  Tank Drain water and sediment when engine 1-29 misfires. Fuel  System Change  final  filter  and  clean  primary  filter, if  plugging  or  power  loss  occurs.  Normal fuel filter service interval is 500 Service Hours or 3 Months. 1 1 1 Alternator  Belts Adjust or replace belt when indicator light 1-29 comes  on. Bucket Teeth Inspect  condition  —  replace  if  worn  or I 1-30 damaged. I Cutting  Edge Change before wear occurs on edge sup- 1-31 port. Seat Belts Inspect  —  replace  if  damaged.  Seat  belt 1-32 must be replaced at least every 3 years. Fuses Replace fuses if elements are broken. 1-33 Ether  Starting  Aid Install,  change  or  temporarily  remove 1-34 ether  cylinder. Engine/Transmission  Oil  Sampling Refer to TB43-0210 1-34B Attachment   Hitch Inspect  hitch  tube  -  attachment  hook  fit  – 1-35 If  badly  worn,  rebuild  tube  with  weld. 1-13