This is the article, I suppose:

MODEL A7 WITH MECHANICAL SEAL

1.0 INTRODUCTION
6. Do not operate a pump with the coupling guard removed. Make sure the guard fits snugly around the coupling so there are no openings.
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2.0 SAFETY CONSIDERATIONS
10. Do not rely on the factory’s alignment of the pump and the drive system. Alignment may have changed during shipment.
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4.0 INSTALLATION
The foundation should be sufficient to absorb any vibration and to form a permanent, rigid support for the baseplate. This is important to maintain the correct alignment of the direct connected unit.
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The pump and motor are aligned at the factory before shipment. Realignment may be necessary after the complete unit has been leveled on the foundation and after the foundation bolts have been tightened.
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4. Check initial alignment between the pump and driver with a straight edge and correct as needed.
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• After Connecting Piping – To ensure pipe strains haven’t altered alignment. If changes have occurred, alter piping to remove pipe strains on pump flanges.
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4.2 RECOMMENDEDPROCEDURE FOR BASEPLATEINSTALLATION AND FINALFIELD ALIGNMENT
Figure 4 – Alignment – Two-Dial Indicator Method
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A unit is in angular alignment when indicator A (Angular Indicator) does not vary by more than.002 in (.05 mm) as measured at four points 90° apart.
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A unit is in parallel alignment when indicator B (Parallel Indicator) does not vary by more than.002 in (.05mm) as measured at four points 90° apart at operating temperature.
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4.3 PIPING CONNECTION –SUCTION/DISCHARGE
All piping must be independently supported, accurately aligned and preferably connected to the pump by a short length of flexible piping. The pump should not have to support the weight of the pipe or compensate for misalignment.
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4.6 COUPLING
The coupling should be installed as advised by the coupling manufacturer. Pumps are shipped without the spacer installed. If the spacer has been installed to facilitate alignment, then it must be removed prior to checking rotation.
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Table 5 – Maintenance Troubleshooting
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Misalignment identified by fracture of ball retainer or a wide ball path on the inner race an a narrower cocked ball path on the outer race. Misalignment is cause by poor mounting practices or defective drive shaft. ..
Replace bearings.
Handle parts carefully and follow mounting procedures.
Check all parts for proper fit and alignment.
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7.2 CLEANING/INSPECTION
All parts should now be thoroughly cleaned and inspected. New bearings, o-rings, gaskets and oil seals should be used. Any parts that show wear or corrosion should be replaced with OEM Wilfley parts.
Casing
• Thoroughly clean gasket surfaces and alignment fits to remove rust and debris.
• Inspect for any unusual erosive wear involute.
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7.6 MECHANICAL SEAL TROUBLESHOOTING
Mechanical seal improperly installed.
Check alignment of faces or damaged parts and assembly method used.
http://de.scribd.com/doc/131183485/a7-iom-mech-seal-b-pdf

Or a similar product fro same manufacturer with similar terminology:
http://pdf.directindustry.com/pdf/ar-wilfley-sons/model-a7nm...


The phrase (section 7.2) was “Thoroughly clean gasket surfaces and alignment fits to remove rust and debris”. It means that all parts (seals, bearings, housing, etc.) fit together and are aligned.

alignment / alignement m | … ~ of bearings / ligne f d’arbre …
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fit n (techn) /ajustement m | ~ [for or to] adj / bon, proper, convenable
(Ernst, Dictionnaire générale de la Technique Industrielle)

I would rephrase as following and translate (for instance):

« Nettoyer minutieusement les surfaces des joints d’étanchéités et toutes les parts alignées afin de »

voir ref Internet