CUMMINS N14 Specifications download pdf (Page 477)

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101

Install a plug in the crankcase breather vent tube.

Remove the ‘‘bottle stopper’’ oil filler cap and install the

blowby checking tool, Part No. 3375150.

Install the water manometer to the blowby checking tool.

Observe the engine blowby.

Engine blowby must not exceed the following specifica-

tions:

Blowby Specifications

New, Rebuilt Engines* 30.5 cm H

0 [12.0 in H

Used Engines** 46.0 cm H

0 [18.0 in H

*Less than 160,000 km [100,000 miles] or 3600 hours.

**Over 160,000 km [100,000 miles] or 3600 hours.

Lubricating Oil Pressure

Use Pressure Gauge, Part No. 3375275, to measure lu-

bricating oil pressure.

Install the pressure gauge to the main oil rifle and observe

the oil pressure.

Low Idle (minimum allowable) 80 kPa [10 psi]

At 1300 RPM (minimum allowable) 205 kPa [30 psi]

At 2100 RPM 310 to 375 kPa [45 to 55 psi]

NOTE: On STC equipped engines, oil pressure will appear

higher (approximately 620 to 690 kPa [90 to 100 psi]) when

the oil temperature is cold due to the viscosity sensor.

Coolant Pressure

Use coolant pressure/temperature/flow analyzer kit, Part

No. 3822994, to measure engine coolant pressure.

Maximum coolant pressure (pressure cap removed) with

closed thermostat is 317 kPa [46 psi].

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

N14 Page 14-37

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