TM-9-2815-225-34-P

ENGINE, DIESEL: 6 CYLINDER IN-LINE TURBOCHARGED, CUMMINS MODEL NTC-400

TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LIST

JULY 2005
TM-9-2815-225-34-P

  TM-9-2815-225-34-P - Page 402 of 736

TM 9-2815-225-34&P
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FUEL PUMP TESTING AND CALIBRATION (Contd)
CHECKING FUEL FILTER RESTRICTION
1.
Connect vacuum gauge (3) to fuel inlet (4) on fuel damper (5).
2.
Bring engine (1) to full throttle and full load on dynamometer (2) and check vacuum gauge (3).
3.
If restriction reads 8 in. (20.3 cm) of vacuum while engine is running at full throttle and full load,
change fuel filter and check other sources of restriction.
4.
Use sight glass to check for moving bubbles and possible gasket or other leaks. If air bubbles are
still seen, check float valve in float tank used for test. Fuel pump may be pumping more fuel than
float valve will allow to pass into the float tank.
FUEL PUMP SEAL INSTALLATION
NOTE
Fuel pump must be sealed after final adjustments are made to
prevent tampering.
1.
Using lockwire and seal (8), insert lockwire through screw (12), plug (11), and threaded stud (14)
on spring pack cover (13).
2.
Twist lockwires together until connection is secure and lockwire is tight.
3.
Bend twisted lockwire into seal and press on top half of seal.
4.
Using lockwire and seal (8), insert lockwire through screw (10), drilled fillister head screw (9), and
captive washer screw (7).
5.
Twist lockwires together until connection is secure and lockwire is tight.
6.
Bend twisted lockwire into seal and press on top half of seal.
THROTTLE SHAFT COVER PLATE INSTALLATION
NOTE
Use etching tool or steel stamp and imprint date of repair on
backside of throttle shaft cover plate (6) for future reference.
1.
Position new throttle shaft cover plate (6) on housing (16).
2.
Drill two new holes on opposite sides of throttle shaft cover plate (6) 0.235 in. (5.969 mm) into
pump housing (16).
3.
Secure new throttle shaft cover plate (6) on housing (16) with two drive screws (15).


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