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  Section IV. CYLINDERS AND RAM
6-7. General
The upper and lower cylinders are attached near
the center of the hammer and can be separated
by removing the capscrews and studs at this
point. The ram can be removed through the
upper cylinder or the lower cylinder. It is better
to remove the ram before the upper and lower
cylinders are separated.
6-8. Upper and lower Cylinders
a. Removal. Remove the upper and lower cyl-
inders as illustrated in figure 6-8.
b. Disassembly. Disassemble the lower cylin-
der as illustrated in figure 6-5 and the upper
cylinder as illustrated in figure 6-9.
c. Cleaning, Inspection and Repair.
(1) Clean all parts with an approved clean-
ing solvent and dry thoroughly.
(2) Inspect all parts for cracks, breaks, and
other damage, Replace a damaged or defective
part.
d. Cylinder Bore. Check cylinder bore for wear
in the area immediately below the exhaust ports.
The maximum wear allowable has been reached
when the bore reads 11.030 inches. If wear goes
beyond this, reconditioning will be necessary.
e. Reassembly. Reassemble the lower cylinder
as illustrated in figure 6-5 and the upper cylinder
as illustrated in figure 6-9.
f. Installation. Install the upper and lower
cylinders as illustrated in figure 6-8.
6-9. Ram and Anvil
Figure 6-8. Upper and lower cylinders, removal
a. Removal.
and installation.
(1) The ram and anvil can be removed as
illustrated in figure 6-10.
(2) The ram can also be removed through
(4) Carefully dress down any burrs on ring
the upper cylinder as follows:
grooves. Do not bevel or chamfer groove edges.
(a) Remove fuel and lube tank (para 3-
c. Installation.
18).
(1) Install the ram and anvil as illustrated
(b) Remove cylinder head (para 6-2).
in figure 6-10.
(c) Screw eyebolt into top of ram and at-
(2) The ram can also be installed in the
tach the hoist line, and lift ram from cylinder.
upper cylinder as follows:
b. Cleaning, Inspection and Repair.
(a) Remove any sharp edges from piston
(1) Clean all parts with an approved clean-
rings.
ing solvent and dry thoroughly.
(b) Lubricate the ram liberally with
(2) Inspect all parts for cracks, breaks, and
grease.
other damage. Replace a damaged or defective
(c) Install a ring compressor in top of
part.
(3) Replace worn wear rings.
cylinder.
AGO 20049A
6-7
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