ENGINE DIAGNOSTIC TOOLS Section 4 KENT-MOORE TACH-N-TIME^TM DYNAMIC TIMING METER SE-4142 (FOR 6.9 Liter Diesel) DESCRIPTION The  SE-4142  TACH-N-TIME^TM    from  Kent-Moore  uses the  latest  in  microprocessor  technology  to  quickly  and accurately measure fuel injection pump timing. The    pump    pulse    is    picked    up    by    a    piezoelectric transducer that clamps on the No.  1 fuel injection line. Crankshaft location is picked  up  with  a  magnetic  probe. The  probe  offset  is  automatically  computed  by  the  SE- 4142 TACH-N-TIMETM. Using the pump pulse signal and the crankshaft location signal,  a  microprocessor  gives  a  digital  display  of  exact engine RPM and injection pump timing in degrees. Figure 8.  TACH-N-TIMETM INSTRUMENT SE-4142 OPERATING PROCEDURES 1. Select the ¼ in.  transducer (black). 2. Clamp-on  the  ¼  in.  piezoelectric  transducer  to the No.  1 fuel injection line (See Figure 9) at the injection nozzle end. IMPORTANT • THE  TRANSDUCER   MUST   BE   PLACED ON    A    STRAIGHT    SECTION    OF    THE FUEL    LINE    WITHIN    4    IN.        OF    THE INJECTION NOZZLE. • CLEAN THE FUEL LINE WITH ABRASIVE CLOTH  OR  STEEL  WOOL  TO  REMOVE ALL   PAINT   PRIOR   TO   AFFIXING   THE TRANSDUCER. • DO NOT ALLOW THE TRANSDUCER TO CONTACT THE INJECTION LINE NUT. • DO NOT OVERTIGHTEN THE TRANSDUCER  ON  THE  FUEL  LINE.    A "SNUG" FIT IS ALL THAT IS NECESSARY FOR PULSE DETECTION. 3. Connect ground clip from transducer harness to an appropriate ground as shown in Figure 9. 4. Connect the remaining wire from the transducer harness to the plug in receptacle on the SE-4142 body labeled "SENSOR SIGNAL". IMPORTANT TRANSDUCER  MUST  BE  DRY.    WET  CONDITIONS CAN    CAUSE    ERRATIC    READINGS.        IF    ERRATIC READINGS ARE OBSERVED, REMOVE TRANSDUCER, WIPE LINE AND TRANSDUCER WITH A  CLEAN,  DRY  CLOTH  AND  SPRAY  TRANSDUCER, ON  ALL  SURFACES,  WITH  A  WATER  DISPLACING SUBSTANCE, SUCH AS WD-40® AND RECLAMP ON THE FUEL LINE. 5. Set   "SENSOR   SIGNAL"   toggle   switch   to   the "CLAMP ON" position. 6. 6.9 Liter Diesel uses magnetic probe method for determining crankshaft position. CGES-240-4 Printed in United States of America Page 11