TM 5-6115-465-34
NAVFAC P-8-625-34
TO 35C2-3-446-2
FUEL DELIVERY
TM 06858B/06859D-34
Table 3-1.
Observe for leaks and correct as necessary. Back
(j) Perform speed droop adjustment as
follows: (See table 3-1.)
out high idle stop screw.
1. At 900 rpm and wide open throttle3
NOTE
adjust high idle screw temporarily for 15-20 mm
The inlet to the fuel transfer pump
delivery per stroke.
should never be pressurized during
2. Raise pump speed to 927 rpm and
beach testing.
turn the droop adjustment cap assembly clockwise as
(e) Close valve in reapply line - transfer
viewed from the trader pump en3 of injection pump
d
to obtain a delivery of 15-20 mm per stroke.
pump must pull at least 18 inches of mercury at 200
rpm. If it does not, check for air leaks on suction
side or malfunction of end plate and transfer pump
3. Lower pump speed to 900 pm and
check fill load delivery rate. If 56-59 mm3 delivery
parts.
rate is not reazlized, repeat steps 1. and 2. above
until 56-59 mm3 is obtained.
(f) Pill graduates to bleed air from teat
stand and to wet glass.
4. When step 3. requirements are met,
lock the high idle adjusting screw.
(g) Observe return oil. Return should be
at rated 100-450 cc/minute at 35 psi transfer pump
pressure.
5. If fuel pump is to be used for 400 Hz
application, reset high idle speed screw to 1125 rpm.
Under no circumstances should 130 psi be
exceeded, as the pump will be damaged.
(k) Check delivery at 750 rpm. If delivery
is not 55-58 mm per stroke, repeat step (j) above
until it is.
(h) Operate pump, with wide
open throttlee and observe transfer pump pressure.
(l) Raise pump speed to 950 rpm and check
for a delivery rate of 5 mm3 maximum.
Pressure should be70 to 75 psig. If it is not, use
a hex key wrench and adjust pressure regulating
spring by 1/4 turns, clochwise to raise pressure -
(m) Lower pump speed to 900 rpm and de-
counterclockwise to lower pressure.
delivery rate.
(i) Perform automatic advance check as
follows:
(n) At the same speed, energize the sole-
noid and check the manual shutoff for the same de-
livery rate of 5 mm3 maximum.
NOTE
Each mark on the timing window is 2
(o) At a pump speed of 200 rpm repeat
steps (n) and (o). Delivery shall be 2 mm3 maximum.
pump degrees.
1. Check at 250 to 400 rpm for one
(p) Check minimum cranking speed delivery
degree can movement.
as follows:
2. Drain burettees for 30 seconds
1. Check transfer pump for 8 psig mini-
minimum.
mum and close the shutoff valve to gauge.
2. Check for 35 mm3 per stroke, mini-
3. Check at 450 to 550 rpm for 3-1/2
mum, at 75 rpm.
degree cam movement.
3-37
Change 3
