TM 5-3810-307-24-1-2
a.
(17) with the mounting holes on one side of the hammer trip housing and backplate (3).
Secure the trip gibs (17) to the hammer trip housing and backplate (3) with the two trip
gib bolts (16). Tighten the bolts and torque to 500 ftlb (677 Nm).
NOTE
Only install two trip gibs on one side of the hammer trip assembly in order
to be able to install the hammer trip assembly on the hammer trip track
rails.
b.
Place Loctite 272 (red) on the four lower bumper mounting bolts (14). Align the two
lower bumpers (15) with the mounting holes in the hammer trip housing and backplate
(3). Secure the lower bumpers (15) to the hammer trip housing and backplate (3) with
the lower bumper mounting bolts (14). Tighten the bolts and torque to 150 ftlb (203
Nm).
c.
Install the stop pin (13) in the hammer trip housing and backplate (3) and secure with
two new roll pins (12).
d.
Install the two connecting links (11) on the lifting pawl (7) and secure with a link pin (10).
Install the other side of the connecting links (11) on the cam (4) and secure with the
second link pin (10).
e.
Install the stop pin (9) in the lifting pawl (7). Secure the stop pin (9) in the lifting pawl (7)
with two new roll pins (8).
f.
Install the lever and shaft (6) in the cam (4) and secure with two new roll pins (cam to
shaft) (5).
Place Loctite 272 (red) on the four leaf spring bolts (1). Align the leaf spring (2) with
g.
the mounting holes in the hammer trip housing and backplate (3) and secure with four
leaf spring bolts (1). Tighten to 45 ftlb (91 Nm).
Installation.
a.
Support the hammer trip assembly (2, Figure K-31) with a jack.
b.
With two trip gibs (4) on one side of the hammer trip assembly (2) removed, raise the
hammer trip assembly and slide the two installed trip gibs (4) over the hammer trip track
rail.
Place Loctite 272 (red) on the two trip gib bolts (3). Place the lower trip gib (4) over the
c.
hammer trip track rail and align with the mounting holes in the hammer trip assembly (2).
Secure the lower trip gib (4) to the hammer trip assembly (2) with the two trip gib bolts
(3). Tighten the bolts and torque to 500 ftlb (677 Nm).
d.
Place Loctite 272 (red) on the two trip gib bolts (3). Place the upper trip gib (4) over the
hammer trip track rail and align with the mounting holes in the hammer trip assembly (2).
Secure the upper trip gib (4) to the hammer trip assembly (2) with the two trip gib bolts
(3). Tighten the bolts and torque to 500 ftlb (677 Nm).
K-74 Change-1
