OPERATOR'S MANUAL

Operating Instructions More Driving Tips and Techniques
Model 330 PB1318 3/01 – 97 –
mission into a lower gear to help control your vehicle
speed. Failure to follow procedures for proper downhill
operation could result in loss of vehicle control.
Economical Driving
Medium–duty truck engines are smaller than those in heavy–
duty, Class–8 vehicles; therefore, your ability (as the driver)
to affect fuel economy is limited.
The following section includes recommendations for best
engine performance and economy:
Engine Overspeed — rpm
• Operate the engine within the optimum engine rpm
range and do not allow the rpm's to exceed the maxi-
mum governed speed. See Engine rpm chart. See your
Engine Operation and Maintenance manual for informa-
tion regarding engine rpm.
• When the engine is used as a brake to control vehicle
speed (e.g., while driving down a grade), do not allow the
engine rpm to exceed maximum governed speed.
• Under normal load and road conditions operate the
engine in the lower end of the range.
• (See next page for Cummins engines)
ENGINE
MODEL /HP*
OPTIMUM
OPERATING
RANGE (rpm)
MAXIMUM GOVERNED SPEED
(rpm)
2000 2200 2400 2500
CATERPILLAR 3126B ENGINES
190 hp 1400-2000
•
210 hp
1400-2000
(1)
•
1400-2000
(2)
•
230 hp 1400-2000
•
250 hp
1400-2000
(3)
•
1400-2000
(4)
•
275 hp
1400-2000
(4)
•
1400-2000
(5)
•
300 hp
1400-2000
(4)
•
1400-2000
(5)
•
* For engine model, see Engine Operation and Maintenance Manual .
(1) 520 lb-ft torque rating
(2) 605 lb-ft torque rating
(3) 660 lb-ft torque rating
(4) 800 lb-ft torque rating
(5) 860 lb-ft torque rating