TM 9-2320-365-34-2
(4) Calibrate fuel timing fixture as follows:
(a) Install contact point 0.50 in. (12.7 mm) excluding
threads, on dial indicator stem.
NOTE
Make sure locating pin (A) in left side of
timing fixture engages hole in calibration
fixture.
(b) Install dial indicator in collet sleeve of timing fixture.
(c) Put dial indicator and timing fixture on injector timing
block and calibration fixture.
(d) Install bolt on the right side to secure timing fixture
to calibration fixture.
(e) Obtain
fuel
timing
dimension
from
engine
information plate located on valve cover.
(f) Subtract injector timing block length (62.00 mm)
from specified fuel timing dimension. Record the
results.
NOTE
In the following calculation the answer recorded in step f. must be converted to a negative number to
obtain correct offset reading on the dial indicator.
(g) Convert the answer to a negative number.
NOTE
This is ONLY an example. Be sure to use correct fuel timing dimension for engine being checked.
Fuel Timing Dimension . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64.01 mm
Length of Injector
Timing block . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62.00 mm
Correct Offset (Converted) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -2.01 mm
The difference is 2.01 mm. Put a minus (-) sign in front of the result (-2.01 mm). The dial indicator
will be moved in the collet so that the pointers indicate this value on the red minus (-) or negative
scale on the dial indicator while timing fixture is mounted securely on calibration fixture.
4-19
