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MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
07/16/15
Champion
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RC160
SECTION II
MAINTENANCE
DISASSEMBLY
•••••
Maintenance should be performed in a clean environment.
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.
•••••
Tools needed: hammer stand, 14-1/2" (368 mm) "J" or fork wrench (possibly incorporated
in the hammer stand), overhead crane or lift truck, pulldown visetong with a 15-1/2"
(394 mm) diameter capacity or a self contained power wrench capable of 150,000
foot pounds (20,700 KGM) of torque, lifting eyes, 2" (51 mm) diameter brass rod or mild
steel rod 3 to 5 feet (1 m to 1.5 m) long, snap ring pliers, chains, lifting slings, a drift pin
and several different sized screwdrivers.
•••••
Clean the outside of the hammer. This will insure a good surface to clamp on.
•••••
The collection tube can be replaced without disassembly of the hammer. Prior to
removal of the collection tube, pressure wash the inside diameter of the collection
tube to remove any cuttings or debris. The collection tube is equipped with two 3/4"
(19 mm) holes to facilitate removal. With the hammer in a vertical position, use an
overhead crane or lift truck of appropriate capacity to remove the collection tube.
Thoroughly lubricate the collection tube O.D. and reverse the process to install the
new collection tube.
CAUTION
FAILURE TO THOROUGHLY CLEAN THE COLLECTION TUBE BEFORE REMOVAL MAY
ALLOW FOREIGN MATERIAL TO CONTAMINATE THE HAMMER.
•••••
Using an overhead crane or lift truck of appropriate capacity, place the hammer on
a hammer stand and secure it in the wrench. The chuck end can be held in the
wrench by the 14-1/2" (368 mm) flats. The backhead is also held in the 14-1/2" (368
mm) wrench except with the addition of flat stock between the wrench and the
backhead flats (as the backhead flats are 12-1/2" (318 mm) across). Place the
visetongs on the area of the case where the bit bearing is located when working on
the chuck end of the hammer. When working on the backhead end of the hammer,
place the chain vise on the area of the case where the feed tube housing in located.
