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2) Degrease the surface with a cloth moistened with cleaning agent (TB 11-003).
3) Blow the surface dry with compressed air or any other means.
4) Apply the penetrant with an aerosol can, a spraying gun or a brush.
NOTE : Ambient temperature must be comprised between 50°F and 122°F (10°C and 50°C).
5) Allow penetrant to dwell for 5 to 30 minutes.
Water washable penetrant
6) Rinse excess penetrant on the surface with water at a temperature comprised between 50°F and 122°F (10°C and 50°C) sprayed by means of a hydropneumatic gun at a pressure less than 29 psi (2 bars).
Non water washable penetrant
CAUTION : DO NOT SPRAY THE SURFACE WITH THE CLEANING AGENT.
6) Remove excess penetrant on the surface with a clean lintfree cloth moistened with the cleaning agent recommended by the penetrant manufacturer.
7) Blow the area dry with compressed air.
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8) Apply the developer and wait for 15 minutes at least.
NOTE : Large cracks show up immediately whereas micro cracks may take a few minutes to develop the best indication.
Fluorescent penetrant inspection
9) To detect cracks, inspect the area with a UV light source in a darkened area under a white light less than 20 Lux in intensity.
Dye penetrant inspection
9) To detect cracks, inspect the area under a white light greater than 500 Lux in intensity.
10) Thoroughly clean with a clean lintfree cloth moistened with cleaning agent (TB 11-003) to remove all traces of penetrant and developer.
11) Recondition the inspected area to its original condition.
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V-BAND CLAMPS
SERVICING
1. TIGHTENING OF V—BAND CLAMPS (Figure 301)
A. Tools and consumable materials
— Rubber mallet
— Appropriate torque wrench
— Red paint
B. Procedure
1) Using a torque wrench, apply seventy per cent of the tightening torque specified in the corresponding chapter of the manual.
2) Using a rubber mallet, lightly tap the external face of the clamp to distribute the tension of the band.
3) Tighten until the specified torque is reached.
4) Repeat steps 2) and 3) twice.
5) Mark the nut and the threading with a line of red paint.
14201010AAAAMA4001
V—band clamps — Servicing
Figure 301
PAGE INTENTIONALLY LEFT BLANK
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APPLICATION OF SICCATIVE OIL
SERVICING
1. APPLICATION OF SICCATIVE OIL INTO THE TUBES
A. Tools and consumable materials
CAUTION : YOU MUST RESPECT SICCATIVE PROPORTION SO THAT THE MIXTURE CAN DRY.
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