Quantcast SELF-RETAINING BOLTS INSTALLATION

 
  
 
TM
55-1730-229-12
AG
320AO-OMM-000
TO
35C2-3-473-1
TM
1730-12/1
SELF-RETAINING
BOLTS
IN-
(4)
Depress pawl and remove washer.
STALLATION
(5)
Pull bolt out until pawl is next to
lug.
(6)
Depress pawl and pull bolt out un-
Standard bolts must not be substituted
til pawl is inside lug.
for self-retaining bolts at any connec-
tion where self-retaining bolts are in-
Hold parts stack-up together and
stalled.
(7)
pull bolt out.
a.
Two types of self-retaining bolts are
NOTE
used. They are positive retention bolts and
impedance bolts. Both types have a fail-safe
feature which prevents loss of bolt, if nut
If stack-up separates while removing
comes off. A nut, safetied with a cotter pin,
bolt, pawl may extend and catch on
must be installed on each self-retaining bolt.
edge of fastener, bearing, or bushing.
If pawl extends while removing bolt,
b.
Positive retention bolts have a pawl
use a thin piece of metal such as
at threaded end of bolt shank. The pawl is spr-
knife edge or rule to depress pawl. Do
not hammer bolt out.
ing loaded to an extended position. When ex-
tended, the pawl prevents the nut from being
removed.  Finger pressure compresses the
e.
Install positive retention bolts as
pawl for removal of the nut and for removal of
follows:
the bolt from the parts. Some of the bolts con-
tain a heat shrunk bushing which replaces the
Place countersink washer under
(1)
sliding bushing in the fastener build-up. This
bolt head. Make sure countersink is next to
prevents installation of the bolt without the
bolt head. The positive retension bolt bushing
bushing being installed. Placards are install-
assembly does not have a washer under the
ed at each location for positive retention
head.
bolts.
c.  Impedance bolts have either spring-
1oaded balls, or a spring ring on the bolt shank
Do not apply antiseize compound on
thread of bolt or nut.
above the threads. These retaining elements
extend beyond the diameter of the bolt and
(2) Apply a coat of antiseize com-
prevent it from sliding from the parts.
pound (E75) to od of bushing and shank of
d.
bolt on bolts 114R3650 series.
Remove positive retention bolts as
follows:
(3) Align bearing, lugs, bolt, and
(1)
Remove cotter pin.
bushing. Install bolt.
Backoff nut until it is next to
(2)
Place washer(s) on the bolt. Use
(4)
pawl.
thick or thin washers as necessary for cotter
pin installation.
Depress pawl and backoff nut
(3)
from bolt.
Change 1

 


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