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TM 9-2320-270-10
DRIVING - CONTINUED
The main transmission OIL Temperature gage (1) should register normal operating temperature
range of 160° to 220oF (71° to 104oC). Check the BATTERY voltmeter (2) and the FUEL
gage (3) often. Normal BATTERY voltmeter reading iS 20-30 vdc. Maximum is 31 vdc.
Check the rpm readings on the tachograph (4) for the proper ranges described in different
conditions below.
NOTE
If gages or indicators show any abnormal conditions, bring truck to a safe stop,
shutdown engine, and notify Organizational Maintenance.
Conserve Engine RPM. It is not necessary to operate the engine at maximum rpm to get good
performance. The engine will perform efficiently at the low and middle speed ranges and offer a
definite fuel advantage at reduced speeds. Conserve rpm by tailoring engine speed to load re-
quirements and the roadspeed desired.
CAUTION
The maximum no-load governed engine speed is 2225 rpm. Never allow engine
speed to exceed 2225 rpm. Under a full load, the governed speed is 2100 rpm.
If the engine is allowed to exceed governed speeds, serious engine damage can
result.
The operator that insists on running in low gear at top rpm when restricted to 25 or 30 mph (40
to 48 km/h) is wasting fuel and creating unnecessary noise.
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