CUMMINS N14 Specifications download pdf (Page 426)

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101

Turbocharger Shaft Axial Clearance -

Checking (10-02)

Measure the axial clearance (end to end), using dial depth

gauge, Part No. ST-537.

Push the rotor assembly away from the gauge.

Set the gauge on zero (0).

Push the rotor assembly toward the gauge and record the

clearance.

Axial Clearance

Model No. mm in

BHT3C 0.03 MIN 0.001

0.10 MAX 0.004

Replace the turbocharger if the axial clearance does not

meet the specifications.

Turbocharger Bearing Radial Clearance

- Checking (10-03)

Measure the compressor impeller radial clearance.

NOTE: Hold the impeller toward the housing. Install a wire

feeler gauge or a flat feeler gauge with a maximum width of

1/4-inch at the minimum clearance point between the im-

peller and the housing.

Compressor Impeller Radial Clearance

Model No. mm in

BHT3C 0.15 MIN 0.006

0.457 MAX 0.018

Measure the turbine wheel radial clearance.

NOTE: Hold the turbine wheel toward the housing. Install a

wire feeler gauge at the minimum clearance point between

the wheel and the housing.

Turbine Wheel Radial Clearance

Model No. mm in

BHT3C 0.20 MIN 0.008

0.533 MAX 0.021

NOTE: If the compressor impeller or the turbine wheel to

housing radial clearance does not meet the specifications

listed, the turbocharger must be rebuilt. Refer to the Com-

ponent Shop Manuals, Bulletin Nos. 3810230 or 3810241, for

Holset turbochargers.

Intake Air System Turbocharger Shaft Axial Clearance - Checking (10-02)

N14 Page 10-7

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CUMMINS N14 Specifications Page 426

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