TM 5-6115-593-34 NAVFAC P-8-631-34 TO-35C2-3-463-2 and tapped as close as possible to the combustion chamber(s). 3. Lubricating oil sump. 4. Engine combustion air in (located at the inlet of the intake manifold). (c) Install appropriate pressure instrumention to measure the following items: 1. Exhaust pressure (combined exhaust gases in exhaust manifold). 2. Intake     air     manifold     pressure (between air filters and manifold). (d) Obtain   and   record   the   barometric and    water    vapor    pressures    (see MIL-HDBK-705, Method 220.2). (e) Bypass the set circuit interrupter. (f) Connect  the  set  to  a  source  of  fuel containing  a  specified  fuel  required by the procurement document. (2) Test. (a) Set governor to zero-droop. (b) Start  and  operate  the  generator  set and   allow   it   to   stabilize   at   rated load, rated voltage and rated frequency    (speed).        During    this period,   reading   of   all   instruments including     thermal     instrumentation shall     be     recorded     at     minimum intervals of 10 minutes. If necessary, adjustments to the load, voltage and rated frequency may be made    to    maintain    rated    load    at rated  voltage  and  rated  frequency. However, adjustments to the voltage    and    frequency    shall    be limited to those adjustments available to the operator. Specifically adjustments so the voltage or frequency adjust devices. No other adjustments to the voltage and frequency control systems should   be   made.      Adjustments   to the    load,    voltage,    or    frequency controls  shall  be  recorded  on  both the data sheet and recording chart(s). Stabilization will be considered  to  have  occurred  when four consecutive voltage and current    recordings    of    the    exciter field   either   remain   unchanged   or have only minor variations about an equilibrium conditions with no evident continued increase or decrease    in    value    after    the    last adjustment  to  the  load,  voltage,  or frequency has been made. (c) Perform    this    test    using    resistive load   only.      Remove   reactive   load after stabilization. (d) Alternately increase the load, voltage    and    frequency    in    small increments    until    the    fuel    system controls   are   in   the   maximum   fuel position as permitted by the governor   control   linkage   and   the voltage  and  frequency  are  within  1 percent of their rated values. NOTE Small increments should be taken to   avoid   passing   the   maximum power   at   the   rated   voltage   and frequency    point    and    to    avoid racing and bogging the engine. 16-21