TM    5-5420-226-20-1 DETAiLED TROUBLESHOOTING PROCEDURE VEHICLE OPERATION -  POWERPLANT, STARTING Symptom-9 BOTH INTAKE MANIFOLD PREHEATERS WILL NOT    WORK .— / E NOTE   — /“ This  procedure   is to be  performed   by ,// ,,..... ‘-:, “::, two persons. The lead person is & / ~: .,. 47 -, ~ referred   to as the  first  technician   and ,,, shaii direct  the  activity  of  the  second person  caiied  the  second  technician. ,,;:+.”. ‘%--; ,>,,,  ‘  ,,, I (~ ~*,J ,,,, % ,  +J &:, 1 ,, ~\ :*A ; ~$ ~ .$* / . -,,’ [\ # “i,,,‘~’ ;.,%,J) (  . -   ~$  ., I-””.w)’ # 1. Check   primer   pump  for   back   pressure. “  ,?’:, < ,~?~   .:    ~<,, U% .r ~ ,,,, ‘\ ^‘-f ‘; ‘,. \q ~ ) Ik   r  “ ? ,+ -’,-i, v . /T\-3. ~~IL’ ‘X.Q CT  ~’”@ 2’ — First Technician (Operator’s Station) l   Set   MASTER BATTERY switch ON. l   Set   FUEL PUMPS switch ON. l   Operate primer pump several times. I Does   primer   pump  buiid  up  normai   back   pressure? d MASTER CONTROL PANEL :12: I(’ 1’:73 a ,“, <.<.,, ,“w i-- FUEL ‘  MASTER PUMPS BAITERY SWiTCH SWiTCH I OPERATOR’S \ 4-222 TA106911