TM 9-2320-272-24-4
5-18. FUEL PUMP SETUP AND CALIBRATION (Contd)
h. Checking and Adjusting Throttle Lever Travel
NOTE
Travel template or indicator, level, and angle will be used to set
pump throttle lever for travel adjustment. Ensure the combination
of the first and third or second and fourth holes on the template
are used. Any other combination will result in an inaccurate
reading. Correct travel is 27-79o.
Place template (7) against throttle housing (8) so inside flats are even on top and bottom.
1.
CAUTION
DO NOT adjust rear throttle screw from valve set under throttle
linkage. The rear throttle screw has already been set to provide
the proper deceleration time for the engine, and any changes at
this point will require recalibration of throttle linkage.
Move the throttle lever (6) to idle position.
2.
NOTE
The throttle lever may be repositioned on shaft as required to line
up the lever and template holes.
Line up template (7) idle hole and center of throttle lever (6) with straightedge.
3.
Move the throttle lever (6) to full throttle position and align template (7) holes with hole in throttle
4.
lever (6).
NOTE
Steps 5 through 8 check throttle lever travel adjustment.
Place level and angle indicator against the bottom of throttle lever (6) and move throttle lever (6) to
5.
idle position. Note reading on scale of angle indicator.
Move throttle lever (6) to full throttle position. Note reading on scale of angle indicator.
6.
Add readings taken in steps 5 and 6. If throttle lever (6) travel is not 27-29o, adjust front throttle
7.
step screw (9) to obtain correct ravel.
After proper adjustment, the throttle lever (6) may be repositioned to accommodate throttle linkage.
8.
i. Testing and Adjusting Pump Main Pressure
1.
With test stand (2) vacuum set at 8 in. HG on vacuum gauge (5) and throttle wide open, adjust
speed to 2,100 rpm.
2.
Place selector valve (4) to ROTAMETER position.
3.
Set fuel flow to 3.15 pph with fuel flow control valve (1).
4.
If fuel pressure reading on pressure gauge (3) is not 172-178 psi (1186-1227 kPa), adjust fuel
pressure.
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