TM 10-3930-671-10 Before Operation How To Perform the Daily Inspection Check  the  hydraulic  sump  tank  fluid  level.    Also,  check the     sump     fill     cap/breather     for     contamination     and damage. When  you  know  that  all  of  the  components  within  the engine  compartment  are  in  satisfactory  condition,  lower the seat deck and close the side doors. Now,   make   sure   that   all   controls   and   systems   are functioning correctly. Press the horn button to check horn function.  If the horn does not operate, report failure to unit maintenance and have it repaired before the truck is put into operation. E-69