TM 5-6115-400-35
locating screw (60, fig. 15) and gaskets
(19) A delivery valve puller is used to extract
(61) and secure firmly.
delivery valve assembly and delivery
valve gasket.
After the barrel locating screws have been
tightened, check the barrels; barrel should
Note. Delivery valve and delivery valve
move freely in the elongated slot.
body are lapped parts. These component
parts are not interchangeable and must
Note.
Always complete one
remain together.
operation 'before proceeding further,
(20) Remove barrel locating screws (60) and
i.e., insert all barrels before inserting
gaskets (61) and remove the barrel from
delivery valves.
pump housing. As such barrel is removed
(2)
After making certain that the barrel is
return it to its respective plunger.
seating squarely on its pump housing
(21) Do not remove the ball bearings (32) from
seat, insert the delivery valve assembly
the camshaft unless it is necessary to
(63) exercising care that the lapped
replace them. If the ball bearings are to
surfaces at the bottom of the delivery
be removed, they must be pressed off the
valve body and top of the plunger (56) are
camshaft with a suitable arbor press.
absolutely clean.
d. Cleaning.
Note. If delivery valve and barrel
lapped surface is discolored or shows
(1) Clean all parts thoroughly with an
signs of not seating properly, use
approved cleaning solvent. Air-blow dry.
lapping plate with 900 lapping
(2) Handle parts as little as possible with bare
compound or finer to clean up lapped
fingers. Lubricate all parts lightly with
surfaces.
preservative oil to prevent corrosion from
perspiration acids. Ordinary clean engine
Caution. Make certain that lapping
oil is suitable if preservative oil is not
is perfectly true and not worn in
available.
center. Install gasket (62), delivery
(3) Gaskets, seals, fastening screws, nuts
valve spring (64) and delivery valve
and washers are to be replaced if worn or
holder (65).
Secure delivery valve
damaged.
holders with 1 1/4 inch socket and
place protection caps on delivery valve
(4) Drive and driven gear should be
examined for wear or broken teeth and
holders.
replaced if necessary.
(3)
Remove the pump from the vise and
replace in an inverted position clamping
(5) Ball bearings should be examined for
the pump at the flats of the hexagon on
excessive wear or roughness. Replace if
the delivery valve holders.
not in good condition.
(4)
Insert the control rack (3) in the same
(6) Springs must be free from nicks, rust
position as it was found before
spots or signs of corrosion. Replace if
disassembly. Replace the control rack
necessary.
stop screw (4) and tighten firmly. Located
(7) Replace lubricating oil baffle (25, fig. 15)
at both ends of the control rack are two
if button end is worn.
punch marks, position the control rack so
e. Reassembly.
that these punch marks protrude
(1) Clamp the pump in the vise, incorporating
equidistant at both sides of the pump
brass jaws or equivalent, in an upright
housing.
position. Remove --- plunger from the
(5)
Stamped on the control sleeve (58) and
barrel and ----- the barrel in the pump.
gear segment (59) are calibration marks.
Align the slotted side of the barrel with the
If neither of these parts
barrel locating screw hole. Replace barrel
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