TM 9-2320-362-14&P
Table 3-2.
Unit Troubleshooting
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
2.
TACHOMETER READING IS INCORRECT
Step 1.
Connect STE/ICE-R to engine (TM 9-2320-280-20).
Start
engine (TM 9-2320-280-10) and let engine come to
normal idle speed of 650 RPM (± 25 RPM).
Step 2.
Check engine idle setting.
If engine idle setting is incorrect, adjust engine
idle (TM 9-2320-280-20).
If engine idle setting is correct, go to step 3.
Step 3.
Compare STE/ICE-R RPM rate to tachometer RPM rate.
If RPM rates agree, procedure is completed.
If RPM rates do not agree, go to step 4.
Step 4.
Remove tach/hourmeter box cover from tach/hourmeter box.
Adjust tachometer adjustment screw (1) on back of
tachometer (2) until RPMs on STE/ICE-R and
tachometer (2) agree.
If tachometer adjusts to correct RPMs, procedure is
completed.
Replace tach/hourmeter box cover on
tach/hourmeter box.
If tachometer will not adjust to desired RPMs, replace
tachometer (para 3-18).
END OF TESTING
3-12
