Section 1
OPERATING INSTRUCTIONS
The engine operator must assume responsibility of engine care while engine is being operated.
There are comparatively few rules which operator must observe to get best service from a Cummins
Diesel Engine.
GENERAL-ALL APPLICATION
New and rebuilt Engine Break-In
S-3.8 engines are tested before being shipped
from the factory and are ready to be put to work.
You will get better life from engine by
,
1. Avoiding operation for long periods at
engine idle speeds, or at maximum
horsepower levels in excess of five
minutes.
2. Developing the habit of watching engine
instruments closely during operation and
letting up on throttle if oil temperature
reaches. 250
0
F (121
0
C) or coolant temperature
exceeds 203
0
F (95
0
C)
3. Checking engine oil level prior to engine start.
4. For continuous rating, load can be applied
after the engine is commissioned.
New or Rebuilt Engines.
Pre-Starting Instructions-First Time Priming the
Fuel System.
1. Fill fuel filter with clean No. 2 diesel fuel oil
meeting the specification outlined.
2. Check the oil level of the MICO fuel pump
with the dipstick provided.
3. Check & fill fuel tanks.
Oil Pan Capacities
High Low
(liters) (liters)
1. Fill engine with amount of oil listed as low-
level oil pan capacity.
2. Allow five (5) minutes or more for oil to drain
to the oil pan. If engine and/or oil
temperature is below 40
0
F (4
0
C), a longer
period may be required for full drain.
3. Insert dipstick into gauge tube fully seated;
hold for five (5) ten (10) seconds, then
withdraw slowly.
4. Add enough additional oil to fill engine to
listed high-level capacity. The dipstick has
mark to high & low oil level.
5. Start engine and operate at idle for 3
minutes. Stop engine wait for 10 minutes and
fill to high mark. Additional oil may be
required to fill oil filters and lines.
Do not confuse with complete oil system capacity
which also includes drilled passages, lines and
filters.
Priming the Lubricating System
Fig. 1-1 : Pre-lubricating Turbo
8 6
Workshop Manual
S3.8 Engine
A030K288 (Issue 2)
01-2010
Note : One receipt of engine by truck,
ensure unloading of the engine by
skiled personnel. The Personnel have to
use necessary personal protective
equipment to avoid accidents. Engines
are to be un loaded using the lifting
hooks fitted on the engines. During the
engine installation ensure proper
fitment of Anti Vibration
Mounting
Pad.
Note : On turbocharged engines,
remove oil inlet line from the
turbocharger and pre-lubricate bearing
by adding 2 to 3 oz. (50 to 60cc) of clean
lubricating oil. Reconnect oil supply
line.
Warning : Ensure that the shipping
bracket is removed during the engine
installation.
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