TM-9-2910-226-34
PUMP, FUEL, METERING AND DISTRIBUTING, ASSEMBLY
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT, MAINTENANCE MANUAL INCLUDING REPAIR PARTS AND SPECIAL TOOLS LISTS
JUNE 1974
TM-9-2910-226-34 - Page 147 of 208
TM 9-2910-226-34
3-56. Precalibration Adjustments.
a.
Remove
nozzle tester hose and fittings from hydraulic head
inlet elbow. Remove nozzle tester from test stand.
Remove improvised adapter.
b.
Remove fuel density compensator. On code G
pumps only, remove governor cover.
c.
Set the smoke limit torque cam angle in ac-
cordance with table 3-8. Smoke limit torque cam
angle is the angle measured from the cam nose to the
fulcrum lever (fig. 3-73).
d.
Back out both idle speed screws, flush with the
bottom of lug.
e.
Remove the governor housing end cover, inner
and outer governor springs and spacers. Remove the
gasket and discard unless a new, untorqued gasket
was used,
f.
Position the operating lever in the low-idle
position. Hold with a spring.
g.
Using a depth micrometer, measure and record
the distance between the governor housing and the
governor sliding sleeve.
h.
Position the operating lever in the full-fuel
position. Hold with a spring.
i.
Again using the depth micrometer, measure
and record the distance between the governor
housing and the sliding sleeve. A reading of 0.630
inch is required for full sliding sleeve travel. If
specification is not attained, internal interference to
the governor components or control sleeve is in-
dicated.
j.
Position the operating lever in the low-idle fuel
position. Hold with a spring.
k.
Install the outer spring spacers and outer
spring on the governor gap gage, 4910-793-5040.
NOTE
Do not install the gasket since the gage is
designed to compensate for gasket
thickness.
l.
Install the outer spring spacers and governor
gap gage in the governor housing until the gage just
touches the spring (fig, 3-144). Using feeler gages,
measure the distance between the gage and the
governor housing. Add or remove spacers until the
correct dimension in figure 3-144 is attained.
m.
Remove the outer spring and spacer from the
gage and install on the governor end cover.
n.
Install the inner spring and spacer on the gage
and install in the governor housing (fig. 3-145). With
the gage flush with the governor housing, measure
the distance between the inner spring spacer and the
gage. Add or remove spacers until the correct
dimension shown in figure 3-145 is attained.
o.
Remove the inner spring and spacer from the
gage and install on the governor end cover.
p.
Using a new gasket, install the governor end
cover, inner and outer springs and spacers in the
governor housing. Torque bolts to 50-60 lb. in.
q.
Reinstall fuel density compensator using new
gasket. Torque the four ¼ inch bolts to 75-100 inch-
pounds. Reinstall fuel line between fuel density
compensator inlet tee and hydraulic head inlet. On
code G pumps only, reinstall governor cover.
3-57. Preparation for Calibration.
NOTE
a.
The key letters shown below in parentheses
refer to figures 3-163, 3-169, and 3-170
unless otherwise indicated.
Remove the ¼ inch pipe plug from the
hydraulic head outlet port and install the overflow
valve. Remove socket head pipe plug from the rear of
the governor housing (code A, B, E and F pumps).
b.
Connect compensator to overflow valve tube
assembly at the valve. Install tube assembly from
compensator inlet tee to the elbow in the hydraulic
head.
Install timing window cover, or solenoid
housing assembly (para 3-47). Torque socket head
capscrew securing the solenoid housing assembly to
110-120 inch-pounds. Install timing device cover,
using a new gasket, and secure with retaining bolts
and lockwashers.
d.
Install test stand-to-pump hoses. Refer to
figures 3-163, 3-169 and 3-170.
c .
3-101
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