TM 9-2320-289-34
3-45.
FUEL INJECTOR PUMP CALIBRATION.
This task covers:
a. Testing Equipment
e. Calibration
Requirements
f. After Calibration
b. Preparation for Calibration
g. Checking and Adjusting
c. Adjustment
Timing Mark
d. Preliminary Testing
INITIAL SETUP:
Equipment condition
Materials/Parts
l Fuel injector pump removed.
l One face cam pin
(See paragraph 3-37)
. One timing cover gasket
. Calibration fluid (Item 13,
l Fuel oil
Appendix B)
(Item 25, 26, or 27, Appendix B)
l Pipe sealant (Item 61, Appendix B)
Tools/Test Equipment
General Safety Instructions
Adjustable dc voltage source
l
Air-timing fixture
Fuel flowmeter
l
Fuel injector pump test stand
Orifice fitting
l
Protractor
Retention torque adapter
Throttle advance gage
Throttle advance gage gasket
Torque wrench
Transfer pressure tap adapter
Ensure that governor cover is installed
before operation of fuel injector pump.
DO NOT perform this procedure near
fire, flames, or sparks.
Compressed air used for cleaning
purposes should never exceed 30 psi
(207 kPa).
a .
TESTING EQUIPMENT REQUIREMENTS
1 .
Injector lines used for testing must be 0,093 in. (2.36 mm) inside diameter and 25 in.
(63.5 cm) long.
2 .
Test stand injector nozzles must include a 0.020 in. (0.5 mm) orifice plate.
3 .
Calibration fluid temperature must be checked as close to transfer pump inlet as possible.
Operating temperature should be 110°F-115°F (43.3°C-46.1°C).
4 .
Fuel supply pressure to fuel injector pump must be set at 4.5-5.5 psi (31-38 kPa).
5 .
The fuel injector pump test stand must include the following:
(a)
(b)
(c)
(d)
(e)
Self-alining zero-backlash drive coupling.
Digital tachometer.
Adjustable dc voltage source. Used to check operation of cold advance solenoid and
shutoff solenoid.
Transfer pressure gage. Used to measure transfer pump, pressure. Operating range
should be 0-160 psi (0-1103 kPa), calibrated in 1 psi (6,895 kPa) increments.
Housing pressure gage. Used to measure housing pressure. Operating range should be
0-30 psi (0-207 kPa).
3-161
