leakage. If a place can not be found where there is  coolant  leakage,  check  the  accuracy  of  the  light for  water  temperature.  Remove  plug  (A)  and  install the   9S9102   Thermistor   Thermometer   Group. 1. 2. To  help  prevent  an  accident  caused  by  parts  In rotation, work carefully around an engine that has been started. Start  the  engine  and  run  it  until  the  temperature is at the desired range according to the test ther- mometer.  The  light  for  water  temperature  must  go on  if  coolant  temperature  is  between  104  and 110°C (200 and 230° F). Water   Temperature   Regulator 3. 4. 5. 6. TM    5-3805-263-14&P-2 Remove  the  regulator  from  the  engine. Heat water in a pan until the temperature is 90°C  (195°F).  This  is  the  correct  temperature for  opening  the  regulator.  Move  the  water around in the pan to make it all be the same temperature. Hang the regulator in the pan of water. The regulator  must  be  below  the  surface  of  the  water and it must be away from the sides and bottom of the  pan. Keep  the  water  at  the  correct  temperature  for  10 minutes. After ten minutes, remove the regulator and immediately  measure  the  distance  the  regulator has  opened.  The  distance  must  be  a  minimum  of 9.53  mm  (.375  in.). If  the  distance  is  less  than  9.53  mm  (.375  in.), make  a  replacement  of  the  regulator. WATER   TEMPERATURE   REGULATOR Part  No. Minimum Open    Distance in. m m Temperature °F °C 7N208 .375 9.53 195° 90° V-BELT   TENSION   CHART WIDTH  TOP BELT   TENSION BELT   TENSION BELT  SUE WIDTH OF   PULLEY “INITIAL”’ "USED" BOAROUGHS   GAUGE   NUMBERS BELT   TOP GROOVE GAUGE    READING GAUGE    READING In. mm In. mm lb. N lb. N OLD  GAUGE  NO. NEW  GAUGE  NO. 3/8 .422 10.72 .380 9.65 100  ±  5 445  ±  22 90  ±  5 400 ± 22 BT-33-73F BT-33-95 1/2 .547 13.89 .500 12.70 120  ±  5 534 ± 22 90  ±  10 400 ± 44 BT-33-96-4-16 BT-33-95 5V .625 15.88 .600 15.24 120  ±  5 534  ±  22 90 ± 10 400 ± 44 BT-33-72-4-15 BT-33-72C 11/16 .688 17.48 .625 15.88 120  ±  5 534  ±  22 90 ± 10 400 ± 44 BT-33-72-4-15 BT-33-72C 3/4 .750 19.05 .690 17.53 120  ±  5 534  ±  22 90  ±  10 400 ± 44 BT-33-72-4-15 BT-33-72C 15/16 .938 23.83 .878 22.30 120 ± 5 534 ± 22 90  ±  10 400  ±  44 BT-33-72-4-15 BT-33-72C MEASURE TENSION OF BELT FARTHEST FROM THE ENGINE. *"INITIAL" BELT TENSION is for a new belt. **"USED"  BELT  TENSION  is  for  a  belt  which  has  more  than  30  minutes  of  operation  at  rated  speed  of  engine. A10232X5 1-69