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GENERAL ASSEMBLY INSTRUCTIONS
Assembly should be performed in a clean environment.
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All parts should be cleaned thoroughly and wiped dry before assembly.
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Oil all parts by hand using Rock Drill Oil to insure easy assembly.
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Coat all thread connections with a thread compound to allow joints to thread easily.
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HAMMER ASSEMBLY
Using the 2" (51 mm) brass rod, install the thick snap ring into the groove, located in
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the chuck end of the case.
In HD model only, insert the bit bearing bushing into the bit bearing.
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Press the bit bearing in the case, until it seats against the snap ring.
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Install the round bit bearing retainer in the groove at the shoulder of the bit bearing.
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Install the thrust washer (1/8" thick on non-HD model) against the shoulder of the chuck
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threads and insert the chuck bushing in the ID under cut of the chuck. With the bit face
down, place the chuck over the top of the bit. Align the splines and lower the chuck
completely onto the bit. Rotate the chuck counterclockwise until the splines meet and
insert the drive plates between the chuck and the bit splines. See Figure 2-3.
Place the bit retaining rings, with the bit retaining ring o-ring installed, over the bit
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shank and on top of the chuck.
02/09/23
N125/P125 Drive Plate Positioning as Viewed from Top
Patriot
Figure 2-3.
125/125HD
Page 11
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