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ADJUSTMENT - TM-5-4210-220-34_233
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TM-5-4210-220-34 Truck Firefiighting 1000 GPM Multipurpose Model 2500L Manual
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REPLACEMENT (cont) - TM-5-4210-220-34_235
TM 5-4210-220-34 2-19. ENGINE - Continued 2-19.12 Throttle, Fuel Shutdown, And Fire Pump Governor - Continued c. Pump Governor Adjustment. NOTE Mechanical Governor, fuel shutdown and foot throttle chamber must be adjusted and the engine idle and maximum rpm must be set prior to carrying out pump governor adjust. (1) Be  sure  pump  governor  has  been  installed  as  in  REPLACEMENT  following.    This  procedure  ensures  the assembly itself is adjusted correctly. (2) With engine shutdown, rotate pump governor arm (3) counterclockwise until the pivot bolt is against the outer end of the slot of the pump governor link (4). (3) Be sure bracket (5) on pump governor shaft is held to the left near bracket (A) and then tighten locking nut and bolt (1 and 2) on the pump governor arm. (4) Start   main   engine   and   start   fire   pump   in structural mode.  Be sure pump is flooded. Using   hand   throttle   on   structural   control panel   adjust   engine   speed   so   that   pump pressure  increases  to  150  psi  (1034  kPa). Be  sure  pump  pressure  is  stable.    Open various discharges and check pump pressure restabilizes to this pressure.  Shut pump down. (5) Set pump to CFR mode and start pump.  Switch on governor and check pump pressure increase to 250 psi (1720  kPa).    If  pressure  exceeds  280  psi  (1930  kPa)  switch  off  pump  governor  immediately.    Reduce pressure as detailed in following steps. (6) With  pump  pressure  stabilized,  adjust  pressure  to  250  psi  (1720  kPa)  using  air  control  valve  mounted  on service brake plate. (7) Open bumper turret and roof turret in turn and check pressure restabilizes to 250 psi (1720 kPa) after each operation. REPLACEMENT a. Fuel Shutdown Replacement NOTE If a new engine is being prepared for installation carry out all instructions. If the fuel shutdown is being removed and installed on engine(s) already in service start at instruction 3. 2-242

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