TM   5-3895-376-14&P 4-12.  ENGINE  MAINTENANCE  INSTRUCTIONS  -  Continued g, Discard  used  oil  filter  in  accordance  with  local policy. h. Coat  gasket  of  new  oil  filter  (4)  with  small amount  of  engine  lubricating  oil. i. Threading clockwise, thread oil filter onto fit- ting on front side of engine. Snug fit the oil fil- ter by hand only enough to prevent leakage. j. Fill  engine  with  engine  lubricating  oil,  (Table  4- 1). k. Check oil level with dipstick (3). Oil level must be at top mark on dipstick. Add oil as neces- sary to bring to top mark. I. Ensure  the  oil  fill  plug  is  clean  and  install  the plug,  and  tighten  firmly  to  seal  gasket. 3. After servicing the engine oil and installing a new oil  filter,  observe  filter  for  sign  of  oil  leakage. NOTE Follow-on   tasks   include:   Return   compactor to  service. 1. Unit maintenance testing of the engine consists of  an  operational  check  for  proper  functioning  of the  engine  and  a  performance  check  of  full  load engine   speed. NOTE Testing of the oil pressure may also be made  by  unit  maintenance  (Para.  4-35). 2. Perform  operational  test  as  follows: a. Start the engine (Para. 2-5), and allow to warm up for 2 - 3 minutes. b. Operate the engine at FULL SPEED throttle and  observe  the  following: (1) Listen  for  unusual  noise. (2) Check  all  fuel  line  connections  for  signs  of leakage. (3) Check  oil  drain  plug  for  signs  of  leakage. (4) Check  oil  filter  for  signs  of  leakage (5) Check for excessive (smoky) exhaust c. Stop  the  engine  (Para.  2-7). 3. Perform   performance   check   as   follows a. Remove  the  v-belt  cover  (Para.  4-24). WARNING Operation of the engine without the v- belt cover installed, exposes mainte- nance  personnel  to  the  v-belt  and centrifugal clutch/pulley in operation. Keep hands and clothing away from op- erating clutch and v-belt. Severe injury may result if hands or clothing are caught  in  the  v-belt. b. Start the engine (Para. 2-5), and allow to warm up for 2 - 3 minutes. c. Using  a  hand  held  mechanical  tachometer,  fit- ted with a rubber cone tip, which is held against the clutch hub at the center hex open- ing, to read engine speed in revolutions per minute  (rpm).  Move  the  throttle  control  to FULL engine speed and observe reading on tachometer.   A   properly   performing   engine should be operating at a governed speed of 2850  rpm. 4. Report  any  incident  of  irregular  performance  or functioning of the engine to unit maintenance. NOTE Follow-on tasks include: Install the v-belt cover  (Para.  4-24). 4-9