TM 9-2320-260-34-1
5-25. FUEL PUMP CALIBRATION (Contd)
k. Testing and Adjusting Governor Fuel Pressure
1. Set fuel pump (3) speed at 1500 rpm.
2. Place selector valve (4) on test stand( 2) in rotameter position. place throttle lever (5) to full open
position.
3. Set fuel flow control valve (1) to 2.30 pph. Fuel pressure should be 100-106 psi (689-730 kPa).
4. If fuel pressure is not 100-106 psi (689-730 kPa) check governor cutoff rpm (subtask e.).
l. Checking and Adjusting Governor Weight Pressure
1. Set fuel pump (3) speed to 1000 rpm.
2. Place throttle lever (5) to full open position.
3. Place selector valve (4) in rotameter position.
4. Set fuel flow control valve (1) to 150 pph. Fuel pressure should be 50-58 psi (345-400 kPa).
NOTE
Add shims to increase pressure, remove shims to decrease
pressure.
Perform steps 6 through 8 if adjustment fails.
5. If fuel pressure is not 50-58 psi (345-400 kPa), remove front cover (7) and add or remove shims from
behind weight plunger (para. 5-23).
6. Remove gear pump (6) from fuel pump (3) (para. 5-17).
7. Install gear pump block plate and gear pump (6) on fuel pump (3) (para. 5-17).
8. Retest fuel pump (3). If pressure is not within limits, replace gear pump (6).
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