CUMMINS N14 Especificações descarregar pdf (Página 465)

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It is a good practice to observe these measurements even

if engine performance meets specifications. If engine

performance does not meet specifications, these mea-

surements can indicate possible reasons for

underperformance. The measurements taken are:

• Fuel inlet restriction at fuel pump inlet

• Fuel temperature

• Exhaust system back pressure

• Air inlet restriction pressure

• Fuel drain pressure

• Coolant pressure

• Oil patch test

• Compulink™ for CELECT™ equipped engines

Obtain the CPL number from the engine data plate and

the fuel pump code from the fuel pump data plate. Engine

performance specifications and fuel system calibration

values for specific engine CPL and fuel pump codes are

listed in the following publications:

1. Fuel Pump Calibration Values, Bulletin No. 3379352.

2. Injector Parts Flow and Cross Reference, Bulletin No.

3379664.

3. Engine Data Sheets.

4. N14 Troubleshooting and Repair Manual, Bulletin No.

3810456.

If a sudden increase in blowby occurs, or if blowby ex-

ceeds the maximum allowable limit during any run-in

step, return to the previous step and continue the run-in.

If blowby does not reach an acceptable level during the

next step, discontinue the run-in and determine the cause.

Do not proceed to the next step until a steady blowby

reading is obtained.

NOTE: Blowby must be measured by using Service Tool,

Part No. 3375150 or 3822566, with manometer, Part No.

ST-1111-3, or equivalent. Service Tool, Part No. 3375150,

as shown, utilizes a chamfered 7.67 mm [0.302 in] orifice.

Start the engine.

Move the throttle to obtain 1200 RPM engine speed, and

apply a test load sufficient to develop 25 percent rated

fuel pressure or 25 percent fuel rate on CELECT™ en-

gines.

Operate the engine at this speed and load level until the

coolant temperature is 70°C [160°F]. Check all gauges

and record the data.

Engine Testing Engine Run-In Procedure - Engine Dynamometer (14-03)

N14 Page 14-25

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Comentários a estes Manuais

Jesus Morales 03 Apr 2025 | 23:07:31

Perfect..

CUMMINS N14 Especificações Página 465

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