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 150 of 208
TM 9-2910-226-34
(6) Connect the test stand overflow valve-to-
test stand fuel return hose (D) to the injection pump
overflow valve. Plug unused opening in tee of
overflow valve to prevent loss of test fluid.
e.
Install nozzle and adapter holders in the ac-
cumulator chambers, three on each side of center
drive hub (refer to fire 3-164).
f.
Install previously calibrated nozzle and holder
assemblies in the accumulator chambers. Tighten to
prevent leakage. (Refer to tables 3-4 through 3-7 for
proper nozzles to be used. )
g.
Install six fuel delivery tube assemblies
supplied with the test stand, to the hydraulic head in
correct numbered sequence. (Hydraulic head outlet
ports are numbered.) Connect the other end to the
injector nozzle assemblies in correct number
sequence (fig. 3.171).
Figure 3-171. Metering and distributing pump discharge sequence.
3-58. Calibration of Fuel Injection Pump.
a.
General.
The following conditions must be
maintained during pump calibration:
(1) Fuel pressure in fuel pressure gage (GG,
fig. 3-162) must be 3-5 psi, all speeds.
(2) Fuel return pressure after overflow valve, 5
psi maximum.
(3) Lubricating oil on the lube oil pressure gage
(D, fig. 3-162), 35 psi minimum.
(4) Do not calibrate pump with diesel fuel
heavier than 0.83 specific gravity at 60 degrees F.
Heavy and light fuels may be blended to obtain
proper specific gravity. (See table 3-9 for specific
gravity temperature conversion. )
(5) Final high- and low-idle adjustment to b
made on operating engine. (Except on code A pump,
adjust low-idle only. )
b. Pre-calibration Procedures.
NOTE
The key letters shown below in parentheses
refer to figure 3-162 unless otherwise in-
dicated.
3-104
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