TM 5-3895-363-13&P
10.3.29
10.3.30
10.3.31
10.3.32
10.4
10.4.1
10.4.1.1
10.4.1.2
10.4.1.3
10.4.1.4
10.4.1.5
Raise hammer about 6 inches allowing
impact block to come out of hammer.
Check rubber ring per 10.4.6.1.
Pry out rubber ring halves from outer
end ring.
Grease wide side of rubber ring halves
and reinstall into end ring cavity.
Drop hammer using it’s weight to snap
rubber ring into cavity.
DISASSEMBLY AND REASSEMBLY OF
HAMMER IN HORIZONTAL POSITION.
The hammer should be in a horizontal
position supported on blocks (approxi-
mately 12" off ground), placed beneath
the guiding positions of the lower cy-
linder. The work will require either a
crane or fork lift of at least 8,000 lb.
capacity.
GUIDES COMPLETE (item 1 page 55).
Remove 16 ea. socket head cap screws
(item 7 page 55) and lock washers (item
5 page 55) that connect tripping device
to gibs (item 8 page 55). Remove from
starter guides (item 3 and 4 page 55).
Remove 4 ea. hex head screws (item 6
page 55) and lock washers (item 5 page
55) connecting starter guides to upper
cylinder.
Remove 4 ea. socket head cap screws
(item 18 page 35) and lock washers
(item 15 page 35) and take off starter
guides from upper cylinder.
Reassemble in reverse order, torque
bolts to following minimums, item 18 to
260 ft.-lb., and item 6 and 7 to 144 ft.-lb.
The side guides (item 10 page 55) do not
have to be removed to perform any other
maintenance but removal is accomp-
lished by taking out 16 ea. socket head
cap screws (item 14 page 55) and lock
washers (item 13 page 55) and then pry-
ing out the side guide from lower cylind-
er. The spool (item 12 page 55) and split
pin (item 11 page 55) come with side
guide and do not have to be
disassembled.
10.4.1.6
10.4.2
10.4.2.1
10.4.2.2
10.4.2.3
10.4.2.4
10.4.3
10.4.3.1
10.4.3.2
10.4.3.3
10.4.3.4
10.4.4
10.4.4.1
10.4.4.2
Reassemble in reverse order, torque item
14 to a minimum of 470 ft.-lb.
UPPER CYLINDER (item 2 page 33).
Remove 8 ea. socket head cap screws
(item 14 page 35) and lock washers
(item 15 page 35) connecting upper cy-
linder to lower cylinder.
Place chocker around upper and support
as upper cylinder is slid off the piston.
Check upper for any inward projections
that would drag on piston such as a
rolled in catch groove, see Section
10.2.3, repair.
Reassemble in reverse order, torque
bolts to a minimum of 260 ft.-lb.
IMPACT BLOCK (item 4 page 33).
Remove 16 ea. socket head cap screws
(item 12) lock washers (item 13) along
with 4 ea. ring segments (item 5) con-
necting lower cylinder (item 1) to outer
end ring (item 2) as shown on page 35.
Pry out impact block enough to place
chocker around impact block shank.
Support impact block while sliding it out
of lower cylinder. The impact block will
come out as a unit with it’s piston rings
(item 6 page 39), outer end ring (item 2
page 35), inner cylinder end ring (item 3
page 35), and rubber ring (item 4 page
35).
Check piston rings (10.4.4), inner cy-
linder end ring (10.4.5), rubber ring
10.4.6), and lower cylinder (10.4.8) be-
fore reassembly.
Reassemble in reverse order (see 10.3.20
through 10.3.22), torque bolts to a min-
imum 470 ft.-lb.
PISTON RINGS (item 6 page 39).
Remove piston rings using piston ring
pliers (see 10.3.17).
Check gap of ring. A new ring will have a
gap of approximately 1-5/16" if the gap
is less than 1/2" replace.
16
