REMOVAL CHERRYLOCK RIVETS (Refer to figure 20-3)
If it is necessary to remove a cherrylock rivet proceed as follows:
1. In thick material: Drive out rivet stem with a tapered steel drift pin to remove lock. (See view 1.)
—CAUTION—
Do not drill completely through the rivet sleeve to remove a rivet
as this will tend to enlarge the hole.
—CAUTION—
In thin material, do not drive out locked rivets. This can damage
the metal sheets.
2. In thin material: Use a small center drill to provide a guide for a larger drill on top of rivet stem. Drill
away tapered portion of stem to destroy lock. (See views 2 and 3.)
a. Using drift pin, pry remainder of locking collar out of rivet head. (See view 3.)
b. Using a drill bit the same size as rivet shank, drill nearly through head of rivet. (See view 4.)
c. Using a drift pin as a pry, break off rivet head. (See view 5.)
d. Using pin having same diameter as rivet shank, drive out remaining rivet shank. (See view 6.)
Figure 20-3. Cherrylock Rivet Removal
20 - 10 - 00
Page - 20 - 03
Reissued: August 1, 1986
1E6
PIPER AIRCRAFT
PA-28-236
MAINTENANCE MANUAL
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