TM-9-2815-213-34
ENGINE, DIESEL, WITH ACCESSORIES CUMMINS MODEL V8-300 (2815-910-8217)
TECHNICAL MANUAL; DIRECT SUPPORT AND GENERAL SUPPORT MAINTENANCE MANUAL (INCLUDING DIRECT SUPPORT AND GENERAL SUPPORT REPAIR PARTS LIST AND DEPOT MAINTENANCE ALLOWANCES)
FEBRUARY 1972
TM-9-2815-213-34 - Page 61 of 192
(3) Remove seating tool and install retainer
with new gasket.
Tighten retainer to 30-40 i
pounds torque.
(4) Recheck injector for ball valve leakage (e
above).
(5) If ball has not seated satisfactorily, it will
be
necessary to resurface ball seat using seating
surface
cutter (6, fig.
B-28).
Great care must be exercised
in
removing only enough material to reface a new seat-
ing surface and remove all metal cuttings.
(6) Re-install ball, new gasket, and retaining
plug
fl2) and fA3), above.
(7) Perform ball seating check (e above).
Figure 3-68.
Ball seat resurfacing
g.
Calibrating PT (Type C) Injectors.
(1) Remove injectors spring and plunk
Lubricate injector adapter (23, fig.
B-28) with h
pressure lubricant so injector O-Rings will slide i
adapter without damage to O-Rings.
(2) Install cap and rotate into its notched
(fig.
3-63).
NOTE
The cap of the adapter contains a movable
dowel screw so the fuel inlet can easily be
centered in the sleeve hole after installing the
cap.
(3) Seat injector in adapter so injector inlet
alines
with adapater inlet after injector body is rotated into
adapter.
Cap pin must seat in slot in adapter.
Check to be sure injector inlet is centered in sleeve
inlet hole.
*TM 9-2815-213-34
(4) Lock cap on injector and injector adapter (23,
fig.
B-28) with two socket head capscrews.
(5) Install spring and plunger in injector.
NOTE
Turn injector plunger so class size marking
on top of spring retainer is midway
between inlet and drain ports of injector.
(6) Assembly retainer plate over injector and in-
jector adapter.
NOTE
The side of the retainer plate with two
small pins locates against the injector
adapter as it is installed in the test stand.
All tests on the test stand are performed
without a screen on the injector.
(7) PT injector delivery is adjusted during test by
burnishing inlet orifice plug with orifice hole bur- nishing tool
(9, fig.
B-28).
Install tool as shown in figure 3-69.
(8) Retract burnishing tool needle by pulling out small
knob.
With the needle retracted, tool may be
left in connector during all test operations.
(9) Run injector through a test cycle (d above), check
cc delivery.
If delivery is lower than
specifications, turn knob with indicator point until it
is spaced
1A
inch from large knob (fig.
3-70).
(10) Slowly push small knob in until you feel nee- dle
enters orifice plug inside diameter, then turn knob
counterclockwise to lock needle shaft to larger knob with
indicator.
Turn indicator knob in until you feel needle contact
plug.
Index indicator with mark for each two cc increased
delivery (fig.
3-70).
(11) Back off adjusting screw and retract needle.
Retest injector (para.
d, above).
If delivery is more than 116-
117 cc.
a new injector body must be install- |
ed.
(12) Recheck injector delivery for specified 116-|
117 cc with new injector body.
3-78.
Installation
a.
Inspect injector, it must be clean and the screen
around inlet groove must have no gaps or holes.
b.
Check that copper sleeves in cylinder heads are
clean, free of chips, and carbon particles.
3-32
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