TESTING AND ADJUSTING
ENGINE SPEED MEASUREMENT
6V3121 MULTITACH GROUP
7. Locknut. 8. Fuel setting cover.
The 6V3 121 Multitach Group can measure
engine speed from a tachometer drive on the engine. It
Put fuel setting cover (8) and gasket in position
also has the ability to measure engine speed from visual
over the fuel setting screw and install bolt and
engine parts in rotation.
synchronizing pin (5) in cover. Install a new seal
Special Instruction, Form No. SEHS7807 is with
the 6V3121 Multitach Group and gives instructions for
the test procedure.