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10/03/16
Patriot
®
45
SECTION II
MAINTENANCE
DISASSEMBLY
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If at all possible, the backhead and chuck should be broken loose on the drill rig; this
is much easier than trying to do so after the drill has been removed from the drill rig.
CAUTION
USE CAUTION WHEN HANDLING DOWN THE HOLE HAMMER PARTS. NUMA HAMMER
PARTS ARE MANUFACTURED FROM HARDENED, HEAT TREATED MATERIALS. DROPPING
OR STRIKING THESE PARTS MAY CAUSE SEVERE DAMAGE. STRIKING THE HAMMER
PARTS WITH HAMMERS, CROWBARS OR LIKE INSTRUMENTS WILL VOID THE WARRANTY.
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Maintenance should be performed in a clean environment.
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Tools needed: hammer stand, chain vise, 2" (51 mm) diameter brass rod, a drift pin,
a small screwdriver and a 3/8" (10 mm) diameter 24" (610 mm) long steel rod.
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Clean the outside of the hammer. This will insure a good surface to clamp on.
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Place the hammer horizontally on a hammer stand and secure the hammer with a
chain vise. Place the chain vise on the area of the case where the bit bearing is
housed when working on the chuck end of the hammer.
CAUTION
THE ACCEPTABLE CLAMPING AREAS START 3.25" (82 MM) FROM BACKHEAD END OF
CASE, TO AN ADDITIONAL 1.90" (48 MM) BEYOND THIS POINT AND 3.25" (82 MM)
FROM THE CHUCK END OF THE CASE, TO AN ADDITIONAL 1.90" (48 MM) BEYOND
THIS POINT. PLACING THE CHAIN VISE ON THE AREA OF THE CASE WHERE THE
PISTON CYCLES CAN DISTORT THE CASE, RESTRICT PISTON MOVEMENT AND VOID
THE WARRANTY.
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Unscrew the backhead / feed tube assembly from the case.
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Slide the piston out of the case.
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Unscrew the chuck and remove from the case.
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Remove the bit retaining rings from the case. Remove the bit retaining rings o-ring
from the bit retaining rings.
Summary of Contents for Patriot 45
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