Fuel Timing Checks - TM-9-2320-365-34-2

FUEL TIMING CHECKS - TM-9-2320-365-34-2_199

Fuel Timing Checks - TM-9-2320-365-34-2_201

/.5tonv1-2/TM-9-2320-365-34-2 M10787 Series 2-1/2-Ton 4x4 Light Medium Tactical Vehicle (LMTV) Manual
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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

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