REPLACE SERRATED LOCKRING SCREW THREAD INSERTS
This task covers:
Remove (page 8-29).
Install Non-sealed Inserts (page 8-31).
Inserts (M981 and M1064 Carrier, External Fuel Tanks Only) (page 8-31).
General Mechanics Tool Kit (Item 35, App B)
Track Vehicle Repairer 63H10
Extractor Screw Set (Item 32, App B)
Portable Elecric Drill (Item 24, App B)
Twist Drill Set (Item 98, App B)
See your -10
Grease (Item 9, App C)
Engine stopped/shutdown (see your 10)
Sealing compound (Item 69, App C)
Carrier blocked (see your -10)
Sealing compound primer (Item 74, App C)
N O T E
Screw thread inserts used in the M981
carrier external fuel tanks (insert with
packing, installed with thread sealant)
are removed using the same method
described here for non-sealed inserts,
except extracting the insert may be more
difficult due to sealant on the threads.
1. Drill out inside serrations of lockring. Use
drill the same diameter as inside serrations.
Drill to depth of counterbore.
Drive in extractor tool to screw out insert. As
insert comes out, it will push out lockring.
If lockring does not come out with insert, hit
ring with a punch and hammer to collapse
ring. Remove ring.
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