TM 55-1520-240-T 8 - 9 . 3    T R A N S M I S S I O N    O I L    P R E S S U R E    I N D I C A T I N G    A N D    W A R N I N G    S Y S T E M    O P E R A T I O N A L    C H E CK 8 - 9 . 3 INITIAL SETUP Applicable    Configurations: All Tools: None Materials: None Personnel  Required: Aircraft Electrician (2) Rotary Wing Aviator (2) References: TM  55-1520-240-10 TM  55-1520-240-23 Equipment    Condition: TM  55-1520-240-23: Battery Connected Electrical Power On Hydraulic  Power  Off Visual Check of Transmission Oil Pressure Indicating  and  Warning  System  Performed TASK RESULT CHECK  TRANSMISSION  AUXILIARY  OIL  PRESSURE  WARNING  SYSTEM 1. Check that XMSN AUX OIL PRESS capsule (1) is lit. 2. Check that three TRANSMISSION AUX OIL PRESS lights (2) are Iit. 3.  Disconnect  plug  from  forward  transmission  auxiliary oil pressure switch (3). 4. Disconnect  plug  from  aft  transmission  auxiliary  oil pressure switch (4). 5.  Disconnect  plug  from  combining  transmission  auxil- iary oil pressure switch (5). If capsule (1) is not lit, go to task 8-9.4. If any light (2) is not on, go to task 8-9.5. FWD TRANSMISSION AUX OIL PRESS light (2) shall go out, If it is still on, go to task 8-9.6. AFT   TRANSMISSION   AUX   OIL   light   (2)   shall go out. If it is still on, go to task 8-9.6. COMB  TRANSMISSION  AUX  OIL  PRESS  light  (2) shall go out. If it is still on, go to task 8-9.6. XMSN AUX OIL PRESS capsule (1) shall go out. If it is still on, go to task 8-9.7. TASK RESULT 6. 7. 8. 9. 10. 11. 12. 13. Short  pin  2  in  forward  transmission  auxiliary  oil pressure  switch  (3)  plug  to  ground  with  a  wire. Remove wire. Short  pin  2  in  aft  transmission  auxiliary  oil  pressure switch  (4)  plug  to  ground  with  a  wire. Remove wire. Short  pin  2  in  combining  transmission  auxiliary  oil pressure  switch  (5)  plug  to  ground  with  a  wire. Remove wire. Press and release each TRANSMISSION AUX OIL PRESS light (2). Connect  plugs  to  combining  transmission,  aft  trans- mission,  and  forward  transmission  auxiliary  oil pressure switches (5, 4, and 3). XMSN AUX OIL PRESS capsule (1) shall come on. FWD TRANSMISSION AUX OIL PRESS light (2) shall come on. If capsule (1) does not come on, go to task  8-9.8. Capsule (1) and light (2) shall go out. XMSN AUX OIL PRESS capsule (1) shall come on. AFT TRANSMISSION AUX OIL PRESS light (2) shall come on. If capsule (1) does not come on, go to task  8-9.8. Capsule (1) and light (2) shall go out. XMSN AUX OIL PRESS capsule (1) shall come on. COMB TRANSMISSION AUX OIL PRESS light (2) shall come on. If capsule (1) does not come on, go to task 8-9.8. Capsule (1) and light (2) shall go out. Each light (2) shall come on when pressed. If it does not, go to task 8-9.9. XMSN AUX OIL PRESS capsule (1) shall come on. FWD, COMB, and AFT TRANSMISSION AUX OIL PRESS lights (2) shall come one. CHECK  TRANSMISSION  MAIN  OIL  PRESSURE  WARNING  SYSTEM 14. Check that XMSN OIL PRESS capsule (6) is lit. If capsule (6) is not lit, go to task 8-9.10. NOTE AFT   TRANSMISSION   MAIN   OIL PRESS  light  may  take  5  to  7 seconds  to  come  on. 15. Check that six TRANSMISSION MAIN OIL PRESS If any light is not on, go to task 8-9.11. lights (7) are lit. 8-158 Change 12 GO   TO   NEXT   PAGE