SECTION  V:  TROUBLESHOOTING TM   9-2350-256-20 Item Problem Hoisting    Boom- 3 cont. 4 Spade Main   Hydraulic 1 Insufficient or no main system oil pressure. System 2 Loss  of  main  hydraulic  pressure  during  operation Auxiliary 1 Insufficient  or  no  auxiliary  system  oil  pressure. Hydraulic 2 Loss   of   auxiliary   hydraulic   pressure   during   operation System 3 Main  and  hoist  winches  fail  to  operate. APU 1 2 3 4 5 6 7 8 9 Main   Hydraulic Pump Auxiliary Hydraulic  Pump Mechanical Transmission- Hydraulic c.   ELECTRICAL Item Problem Battery   Power Circuit Master  Relay System and Slave Receptacle Hoisting boom creeps. Boom stayline cables become slack during 1ive boom operation. 1 Spade  fails  to  operate. 2 Spade   operates   with   difficulty. 3 Spade   creeps. Engine  fails  to  crank  when  starting  switch  is  operated. Engine cranks but fails to start. Engine  hard  to  start. Engine  hard  to  start  in  cold  weather. Engine starts but fails to keep running, misfires, or lacks power. Engine    overheating. Engine discharges black smoke. Engine  knocks. Engine uses excessive oil and discharges light blue smoky exhaust. 1 Main   hydraulic   pump   fails   to   operate. 2 Main  hydraulic  pump  fails  to  develop  sufficient  pressure. 3 Main  hydraulic  pump  is  noisy  during  operation. Auxiliary   hydraulic   pump   does   not   operate Mechanical  transmission  fails  to  operate,  slips,  or  chatters. Battery-Generator   gage   indicates   low   battery   charge 1 Master   relay   fails   to   operate. 2 No  power  to  slave  receptacle. Solution or Reference See   Page   2-45 See  page  2-45 See   page   2-48 See   page  2-48 See  page  2-48 See   page   2-49 See   page   2-49 See  page   2-51 See  page   2-51 see   page  2-51 See  page   2-52 See   page   2-52 See   page  3-52 See  page  2-52 See  page  2-52 See  page   2-52 See   page   2-52 See  page   2-52 See  page  2-52 See   page  2-53 See  page   2-53 See  page  2-53 See   page   2-55 See  page  2-56 Solution or Reference See  page  2-58 See  page  2-60 See   page  2-60 Change  1 2-36.1