O-RING MACHINE SURFACE TO FIT O-RING
SEALANT PASSAGE SEALANT CHAMBER
TOOL BODY (CROSS SECTION) UPPER PISTON
LOWER PISTON
Temporary Repair Tool (F70230) for Self-Sealing Rivets
Figure 810
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6) If it is necessary, do this Task: Application of Corrosion Resistant Finish (Topcoat) (AMM 28-11-00/701).
NOTE: A layer of corrosion resistant finish is
____ necessary only to protect bare (anodized) metal. It is not necessary to apply a layer of corrosion resistant finish on sealant. Corrosion resistant finish can be applied on sealant, but it is not necessary. Usually topcoat is applied to sealant only when it must be applied to protect adjacent bare metal.
(c) Repair fasteners with metal seal covers. 1) Use a sealant cutting tool to cut around and under the metal seal cover and to separate the sealant from the structure.
2) Hold the metal seal cover with pliers and pull away from the fastener.
NOTE: This should remove most of the sealant.
____
LOCKBOLT
BOLT NOTE: ALL DIMENSIONS ARE IN INCHES.
Dimensions of Fillet Seals (Inches) for Fasteners Figure 811
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3) Cut and remove the remaining sealant.
NOTE:____ You do not have to remove small quantities of
sealant that bond tightly to the fastener.
4) Clean the metal seal covers, fastener ends, and structure
area with cleaning solvent.
5) Apply precoat to the area with BMS 5-26 Type II Class A-2
sealant.
NOTE: Precoat is optional when you use Pro-Seal 860, B 1/6
____ sealant.
a) Apply the precoat smoothly and equally into all the crevices.
6) Fill a metal seal cover, of the correct size and shape, two-thirds full of BMS 5-26 Type II Class B or Pro-Seal 860, B 1/6 sealant with a sealing gun or a clean spatula (Fig. 812).
7) Make sure there is sufficient sealant to be extruded around the base and through the hole in the top of the metal seal cover.
8) Push the sealant in the metal seal cover to make sure there are no holes left.
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