TM  10-4320-344-10 Figure 2-10.   Preventive Maintenance Checks and Services for Pumping Assembly Model 609-A. (Continued) Location Item Item  to No. Interval Check/Service TRAILER CHASSIS -  CONT Procedure Not  Fully  Mis- sion   Capable   if Some  pumping  assemblies  may refer   to   figure   1-4. 7 8 Before Before Tongue  Jack Safety/Breakaway Chains  and Intervehicular Cable be  equipped  a  tongue  jack  different  than  shown, Check   tongue   jack,   supports, and   welds   for   damage.   If damaged,   notify   unit maintenance. Check   that   jack is   secured   and   jack   is operable. If  needed,  operate tripod   jack   to   level   trailer. If   not   operable,   notify   unit maintenance. Check   for   damaged/broken chains. Check   intervehicular cable   for   damaged   connector   and broken   pins. If   chain   is damaged  or  broken  or intervehicular   cable   is   damaged or   has   broken   pin(s),   notify unit   maintenance. Tongue   jack   is inoperable. Tripod   is damaged. Chain  is  damaged or  broken. Intervehicular cable   is   damaged or  has  broken pin(s). 2-20 NOTE