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.
Ariel
Corporation Application Manual
6 December 2006