CHAPTER  1 INTRODUCTION Section   I.   GENERAL 1-1.   Scope. a.  This  manual  contains  instructions  for immediate  (field)  (direct  support,  general  support)  and depot  maintenance  personnel  maintaining  the  engine sets, 50/60 Hertz (Mode 1) Tactical Utility (Class 2) and Tactical Precise (Class 1) and Engine Generator Sets, 400 Hertz (Mode 11) Tactical Precise (Class I) as authorized by  the  maintenance  allocation  chart.  It  provides  informa- tion on the maintenance of the equipment which is beyond the scope of the tools, equipment, personnel, or supplies  normally  available  to  the  operator  and  organiza- tional levels. b.  Demolition  of  material  to  prevent  enemy  use will be in accordance with the requirement of TM 750-244-3. (Procedures for Destruction of Equipment to Prevent  Enemy  Use  for  U.S.  Army).  Preparation  for shipment and storage for U.S. Air Force will be in accor- dance with T.O. 35-1-4. Shipment and storage for U.S. Army will be in accordance with TB-740-97-2. 1-2.  Forms  and  Records. THIS  TECHNICAL  MANUAL  IS  USED  BY  THE ARMY, AIR FORCE, NAVY AND MARINE CORPS. THE  USE  OF  FORMS  IN  COMPLIANCE  WITH DIRECTIVES  AS  STATED  HEREIN  WILL  BE ACCOMPLISHED  ONLY  BY  THE  PERSONNEL OF  THE  SERVICE  TO  WHICH  THEY  APPLY. a .   Forms   and   Records   used   by   the   Army will   be   only   those   prescribed   by   DA   Pam 738-750.   Those   used   by   the   Marine   Corps will   be   those   prescribed   by   TM4700-15/l. Other   service   users   should   refer   to   ap   - propriate specifications/publications for   equipment   maintenance   forms   and r e c o r d s. b.  Report  of  errors,  omissions,  and  recommen- dations  for  improvement  of  this  publication  by  the  in- dividual  users  should  be  submitted  as  follows: (1)  Air  Force–AFTO  Form  22.  Direct  to:  Com- mander,  Sacramento  Air  Logistics  Center,  ATTN:  SM- ALC-MMETDA,  McClellan  Air  Force  Base,  California 95652-5609,  in  accordance  with  TO-00-5-1. (2)  Army–DA  Form  2028.  Direct  to:  Com- mander, U.S. Army Troop Support Command. ATTN: AMSTR-MCTS, 4300 Goodfellow Blvd., St. Louis, MO 63120-1798. (3)  Marine  Corps-NAVMC  Form  10772.  Direct to:  Commanding  General  U.S.  Marine  Corps  Logistics Base,  (Code  850),  Albany,  GA  31704-5000. (4)  Navy–by  letter.  Direct  to:  Commanding  Of- ficer,  Naval  Construction  Battalion  Center,  ATTN:  Code 15741,   Port   Hueneme,   CA   93043-5000. Section   II.   DESCRIPTION   AND   DATA 1-3.    Description A  general  description  of  the  diesel  engine  generator  sets conditions,  the  operations  will  take  longer,  but  under and  information  pertaining  to  the  identification  plates ideal  conditions  with  highly  skilled  mechanics,  most  of are  contained  in  the  Operator  and  Organizational the operations can be accomplished in less time. Maintenance  Manual.  Detailed  descriptions  of  the  com- ponents  of  the  diesel  engine  generator  sets  are  provided 1-5.   Tabulated   Data. in  the  applicable  maintenance  paragraphs  of  this manual. a.   General.   This   paragraph   contains   all maintenance  data  pertinent  to  intermediate  (field) 1-4.   Time   Standards. (direct,  general  support)  and  depot  maintenance personnel. Table 1-1 lists the number of man-hours required under normal  conditions  to  perform  the  indicated-maintenance b.   Engine   Generator   Set.   Refer   to   Operator and  repair  for  the  generator  set.  Components  are  listed and  Organizational  Maintenance  Manual. under  the  appropriate  group  number.^-The  times  listed are  not  intended  to  be  rigid  standards.  Under  adverse c.  Main  Generator.  (50/60  Hz)  Exciter  field  voltage and current versus load, see the following: Change   10   1-1