for optimum service life during initial 100 hours or 3000
mi. (4827 km) of service by:
Operating as much as possible in half to
three-quarter throttle or load range.
2. Avoiding operation for long periods at engine
idle speeds, or at maximum horsepower levels in excess
of five minutes.
3. Developing the habit of watching engine
instruments closely during operation and letting up on
throttle if oil temperature reaches 250 deg. F (121 deg.
C) or coolant temperature exceeds 190 deg. F (88 deg.
4. Operating with a power requirement that allows
Lubricate the air suspension seat at locations shown
5. Checking oil level at each 300 mi. (483 km) or
using IH 251H EP grease or equivalent NLGI #2 multi-
10 hours during the break-in period.
purpose lithium grease.
PRE-STARTING INSTRUCTIONS FIRST TIME
PRIMING THE FUEL SYSTEM
1. Fill fuel filter with clean No. 2 diesel fuel oil
meeting the specifications outlined in Section 3.
a. With PT (type G) fuel pump, fill pump through
b. With PT (type G) VS fuel pump, remove suction
line and wet gear pump gears with clean fuel.
2. Check and fill fuel tanks.
ENGINE OPERATING INSTRUCTIONS
3. If injector and valve or other adjustments have
The engine operator must assume responsibility of
been disturbed by any maintenance work, check to be
engine care while engine is being operated. There are
sure they have been properly adjusted before starting
comparatively few rules which operator must observe to
get best service from a Cummins Diesel.
PRIMING THE LUBRICATING SYSTEM
NEW AND REBUILT ENGINE BREAK-IN
NOTE: On turbocharged engines, remove oil
Cummins engines are run-in on dynamometers
inlet line from the turbocharger and prelubricate
before being shipped from the factory and are ready to
bearing by adding 2 to 3 oz. (50 to 60 cc) of clean
be put to work in applications such as emergency fire
lubricating oil. Reconnect oil supply line.
1. Fill crankcase to "L" (low) mark on dipstick. See
In other applications, the engine can be put to work, but
Lubricating Oil Specifications, Section 3.
the operator has an opportunity to establish conditions