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8.
CASE
The case is designed to contain the internal parts which make up the hammer
assembly. The case is non-reversible and hardened to resist wear and to extend life in
abrasive conditions. A 11-3/4" (298 mm) OD HD case is also available as an optional
extra.
9.
SNAP RING
A snap ring positions the internal parts in the hammer and prevents the piston from
falling out when the chuck, bit retaining rings, bit bearing and bit are removed.
10.
BIT BEARING
The bit bearing guides the bit to insure proper alignment between the piston and the
bit. The bit bearing is placed into the chuck end of the case and is located by a
snap ring which is inserted into the main bore. The HD model only has a bit bearing
designed for a bit bearing bushing.
11.
BIT BEARING BUSHING (HD model only)
The bit bearing bushing is a nylon insert located in the bit bearing to provide a bearing
surface between the upper bit shank and bit bearing.
12.
BIT BEARING RETAINER
The bit bearing retainer sits in a groove in the case and retains the bit bearing.
13.
BIT RETAINING RINGS
The bit retaining rings are designed to allow the bit to move between the drilling and
cleaning positions and prevent the bit from coming completely out of the hammer.
The bit retaining rings consist of two matched halves and are held together with the
bit retaining ring o-ring.
14.
THRUST WASHERS - BRASS
Two brass thrust washers, one located between the backhead and the case and one
between the chuck and the case, provide for easy disassembly.
02/09/23
Patriot
125/125HD
Page 3
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