TM 10-3930-675-10 0013 00-6 Table 1.  Preventive Maintenance Checks and Services (PMCS) for RTCH-RT 240 - Continued. ITEM NO. INTERVAL LOCATION PROCEDURE NOT FULLY MISSION CAPABLE IF: ITEM TO CHECK/ SERVICE 20 (Con’t) During Hydraulic Controls b. Ensure red twistlock indicator light at end of boom is lit. b. Twistlock  indicator  light  is not lit. 21 During Instrument Panel a. With RTCH fully warmed up, moni- tor indicators and warning lights on ECS   display   screen.   Check   that engine oil pressure and temperature and transmission and hydraulic sys- tem  and  engine  coolant  tempera- tures register within normal ranges: •   Engine  oil  pressure—15-35  psi (103-241 kPa) •   Engine   oil   temperature—195- 240°F (91-116°C) •   Transmission temperature— 175-220°F (79-104°C) •   Hydraulic    oil    temperature— below 160°F (71°C) •   Coolant temperature—175- 210°F (79-99°C) a. ECS display screen indicates an abnormal reading. b. Ensure  alternator  charging  lamp  is not lit. b. Alternator    charging    lamp remains lit. c. Monitor    all    lifting    boom    and tophandler  functions   on  the  ECS display screens. c.  Loss  of  ECS  display  func- tions occurs. 22 During Brakes a. Check  service  brakes  for  pulling, grabbing or reduced braking ability. a. Brakes  pull,  grab  or  exhibit unsafe operation. b. Check parking brake operation with engine  idling  and  transmission  in high range. b. Parking brake will not  hold truck. 23 During Steering Check for smooth, controlled steering without   pulling   or   drifting.   Check two-wheel,    four-wheel,    and    crab modes of steering operation. Steering  is  erratic  or  will  not change modes of operation. 24 During Drive Train Check  for  unusual  noise  or  vibration from    engine,    transmission,    drive shafts, axles, and wheels. 25 During Overall Leakage Be alert for evidence of fluid leakage. Class III oil, coolant or hydrau- lic leaks are evident. Any fuel leaks are evident.