Assembly Inspections And Tests

During the assembly process, all units are subjected to a series of inspections to ensure mechanical soundness (reference ER-5.3). These include:

Measurement and recording of critical values such as crankshaft end clearances, connecting rod side clearances, rod runout, and bearing jack clearances.

Check operation of lubrication system components including shutdowns, pump(s), passages and fittings.

Verify critical torque values.

Check freedom of movement of crankshaft and connecting rod pins.

All mechanically complete units (excluding valves) are to be run tested for at least 4 hours, during which time operating parameters will be monitored and recorded on the Production Test Log (ER-5.3.1).

After the run test additional inspections are performed on the unit including:

Measure and record temperatures of main bearing caps and connecting rods (at split lines), within 5 minutes of completion of run test.

Visually inspect bores, piston rods, crosshead shoes and slides for any scoring or unusual wear patterns.

Crankshaft end clearances are measured and recorded.

Critical torques and set screws are checked and adjusted when required.

After passing all previous inspections the unit is prepared for shipment. Final visual checks of unit and associated paperwork is performed by Quality Control.

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Assembly Inspections And Tests