CUMMINS N14 Specifications download pdf (Page 474)

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101

Fuel Drain Line Restriction

Use Pressure Gauge, Part No. ST-1273, to measure fuel

drain line restriction.

NOTE: Do not measure fuel drain line restriction with the

fuel measuring device installed. This will not measure the

drain line restriction of the vehicle’s return plumbing.

Hold the gauge at the same level as the connection.

NOTE: The gauge will not measure the correct pressure if

the gauge is not held at the same level as the connection.

Operate the engine at maximum horsepower RPM and

Advertised Horsepower.

Observe the reading on the gauge.

NOTE: The maximum fuel drain line restriction for STC and

CELECT™ is as follows:

With Check Valves: 165 mm Hg [6.5 in Hg]

Without Check Valves: 65 mm Hg [2.5 in Hg]

Intake Manifold Pressure

Measure the intake manifold pressure (turbocharger

boost). Install pressure gauge, Part No. ST-1273, in the

intake manifold as shown.

Observe the reading on the pressure gauge.

General Test Procedure - Chassis Dynamometer (14-05) Engine Testing

N14Page 14-34

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