Numa Champion RC160 Maintenance manual

MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
®®
®®
®
RC160
CARE & MAINTENANCECARE & MAINTENANCE
CARE & MAINTENANCECARE & MAINTENANCE
CARE & MAINTENANCE
INSTRINSTR
INSTRINSTR
INSTRUCTIONSUCTIONS
UCTIONSUCTIONS
UCTIONS
©2015 Numa All Rights Reserved
P.O. Box 348 ••
••
•646 Thompson Road ••
••
•Thompson, CT 06277 USA
US Toll Free: (800) 356-NUMA ••
••
•Tel: [phone] ••
••
•Fax: [phone]
E-mail: [email protected]
Website: www.numahammers.com
Patents 4,530,408 4,919,221 4,962,822 5,205,363 5,984,021 5,992,537 6,021,856 7,422,074

MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
®®
®®
®
RC160
TABLE OF CONTENTS
Section I Description...............................................................1
Functional Description ................................................................... 2
1. Backhead.............................................................................. 2
2. Check Valve Seat................................................................. 2
3. Check Valve ......................................................................... 2
4. Check Valve Spring.............................................................. 2
5. Collection Tube..................................................................... 2
6. Collection Tube Housing ...................................................... 2
7. Belleville Washers ................................................................. 2
8. Feed Tube Housing ............................................................... 2
9. Feed Tube Compression Ring.............................................. 3
10. Feed Tube.............................................................................. 3
11. Piston...................................................................................... 3
12. Case....................................................................................... 3
13. Bit Bearing ............................................................................. 3
14. Snap Ring............................................................................... 3
15. Bit Retaining Rings................................................................. 3
16. Thrust Washers....................................................................... 3
17. Chuck .................................................................................... 4
18. Chuck Bushing ...................................................................... 4
19. Drive Plates............................................................................ 4
Section II Maintenance ...........................................................5
Disassembly .................................................................................... 5
Inspection ....................................................................................... 8
General Assembly........................................................................ 11
Feed Tube Assembly.................................................................... 11
Hammer Assembly....................................................................... 12
Section III Parts Identification................................................ 14
Champion RC160 Exploded View....................................... 14 & 15
Part Number Reference ....................................................... 14 & 15
Section IV Air Consumption Charts ...................................... 16
Section V Lubrication............................................................. 17
Section VI Storage ................................................................. 18
Short Term...................................................................................... 18
Long Term...................................................................................... 18
Restarting ...................................................................................... 19
Section VII Button Bit Maintenance...................................... 20
General ......................................................................................... 20
Sharpening.................................................................................... 20
Section VIII Champion RC160 Recommended Spares...... 21
Page

04/23/10
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
WARRANTIES AND REMEDIES
LIMITED WARRANTY
Numa warrants that the Product will be new and free from defects in material and
workmanship under normal use as contemplated by this Contract for a period of six (6) months from
the date of shipment.
Except for the foregoing warranty, Numa disclaims all warranties and representations wherever
made, including warranties of merchantability, durability, length of service, or fitness for a particular
purpose.
Any alteration or modification of the original product without the express written consent of
Numa will void this warranty.
REMEDY
If, during such warranty period, Buyer promptly notifies Numa in writing of any defect and
establishes that the above warranty is not met, Numa shall either repair or replace the Product or
credit the customer, as it deems necessary to meet the warranty.
Such repair, replacement, or credit of Product shall constitute complete fulfillment of Numa's
obligation under this warranty, and upon the expiration of the original warranty period, all of
Numa's obligations hereunder shall terminate.
LIMITATION OF LIABILITY
Numa shall not be liable to Buyer whether in contract, in tort (including negligence and
strict liability), under any warranty or otherwise, for any special, indirect, incidental or consequential
loss or damage whatsoever, including (without limitation) loss arising from delay, cost or capital
and loss of profits or revenues. The remedies set forth in this Contract are exclusive, and the total
cumulative liability of Numa under this Contract or for any act or omission in connection therewith
or related thereto, whether in contract, in tort (including negligence and strict liability), under any
warranty or otherwise, is limited to the price paid by Buyer for the Product.
The WARNINGS, CAUTIONS and NOTES used throughout the text of this
instruction book are defined as follows:
WARNING A specific procedure or practice that must be strictly followed,
or a specific condition that must be met, to prevent possible
bodily harm.
CAUTION A specific procedure or practice that must be strictly followed,
or a specific condition that must be met, to prevent damage to
the equipment.
NOTE Important supplemental information.
Numa®,Champion
®®
®®
®
, and Patriot
®®
®®
®
are registered trademarks of Numa.

Page 1
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
07/16/15
Champion
®®
®®
®
RC160
SECTION I
DESCRIPTION
GENERAL DESCRIPTION
The Champion RC160 is a valveless, pneumatically operated reverse circulation drill
designed to utilize Numa 16" to 20" (406 mm to 508 mm) diameter reverse circulation bits in
a wide range of drilling applications.
The Champion RC160 hammer design incorporates a hardened case and a large
diameter collection tube. The large bore design of the Champion RC160 provides high
performance levels as associated with other Numa down hole hammers.
The Champion RC160 was specifically designed to provide maximum performance
on the drill rigs that are most commonly used in large diameter drilling applications. The
Champion RC160 hammer is designed to operate using air pressure from 100 PSI to 200 PSI
(6.9 Bar to 13.8 Bar) with compressors having 2000 CFM (944 Litres/Second) or more.
Champion RC160
Weight w/o Bit 2875 lbs. (1304 kg)
Outside Diameter 15-1/2" (394 mm)
Hammer Length:
Shoulder to Shoulder 81-3/4" (208 cm)
Shoulder to Bit Face 91-3/4" (233 cm)
Table 1-1 General Hammer Specifications
16" (406 mm) * 950 lbs. (431 kg)
18" (457 mm) * 1100 lbs. (499 kg)
20" (508 mm) 1121 lbs. (510 kg)
Table 1-2 General Bit Specifications
* Bit weights are approximate
NOTE
NUMA 16" TO 20" (406 MM TO 508 MM) BITS ARE AVAILABLE IN A CONCAVE FACE
DESIGN WITH A LARGE CENTER COLLECTION TUBE TO TAKE ADVANTAGE OF THE
CHAMPION RC160 PERFORMANCE. OTHER SIZES MAY BE AVAILABLE UPON
REQUEST.

07/16/15Page 2
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
®®
®®
®
RC160
FUNCTIONAL DESCRIPTION
1. BACKHEAD
Thebackheadconnects the hammertothe drillrod.Backheads can bemanufactured
to be compatible with several reverse circulation drill rod designs. Please contact
your distributor or regional salesperson for more information. Wrench flats are
provided for disassembly.
2. CHECK VALVE SEAT
The check valve seat provides the sealing surface for the check valve and guides the
collection tube.
3. CHECK VALVE
The check valve maintains pressure in the hammer when the air supply has been
shut off. The check valve in the hammer balances the hydrostatic pressure in the
hole thereby preventing contaminants from entering the hammer.
4. CHECK VALVE SPRING
The check valve spring provides tension under the check valve to keep it closed. It
is compressed as the air is turned on.
5. COLLECTION TUBE
The collection tube extends from the backhead to the bit and transfers the collected
drill cuttings to the inner drill pipe of the reverse circulation drill rod. The collection
tube is designed to be easily replaced without removing the backhead from the drill.
6. COLLECTION TUBE HOUSING
The collection tube housing aligns the collection tube. Holes in the collection tube
housing allow the transfer of air to the feed tube assembly.
7. BELLEVILLE WASHERS
Two belleville washers sit between the collection tube housing and the feed tube
housing to keep the feed tube housing tight against the shoulder in the hammer.
8. FEED TUBE HOUSING
The feed tube housing is aligned in the main bore of the hammer. It sits against a
shoulder in the case and is held in position by the backhead, collection tube housing
and belleville washer combination. The feed tube housing locates and aligns the
feed tube.

Page 3
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
07/16/15
Champion
®®
®®
®
RC160
9. FEED TUBE COMPRESSION RING
A feed tube compression ring sits between the feed tube and the feed tube housing
and keeps the feed tube assembly tight.
10. FEED TUBE
The feed tube supplies the main air into the chambers located in the piston. It seats on
a shoulder in the feed tube housing and is designed with a long bearing surface to
maintain alignment in the feed tube housing.
11. PISTON
The piston functions as the only moving part in the hammer, controlling the operational
air cycle. The percussive action of the piston striking the bit transfers the energy
through the bit in order to fracture rock formations.
12. CASE
The case is designed to contain the internal parts which make up the hammer
assembly. The case is hardened to resist wear and to extend life in abrasive conditions.
13. BIT BEARING
The bit bearing guides the top end of the bit to insure proper alignment between the
piston and the bit. The bit bearing is positioned in the chuck end of the case and is
held in place by the snap ring.
14. SNAP RING
The snap ring sits in a groove in the case and retains the bit bearing.
15. 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.
16. THRUST WASHERS
Two brass thrust washers, one located between the backhead and the case and one
between the chuck and the case, provide for easy disassembly.

07/16/15Page 4
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
®®
®®
®
RC160
17. CHUCK
Thechuckthreadsintothebottomendofthecasewithalargecrosssectionthreadform.
It has internal splines that transmit rotation to the bit through a set of delrin drive plates.
18. CHUCK BUSHING
The chuck bushing is a nylon insert located in the bottom end of the chuck to provide
a bearing surface between the lower bit shank and the chuck.
19. DRIVE PLATES
The plastic drive plates provide wear protection for the splines. They are inserted
between the chuck and the bit. A complete drive plate set (12) is sent with each bit.

Page 5
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
07/16/15
Champion
®®
®®
®
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.
••
••
•Toolsneeded:hammerstand,14-1/2"(368mm)"J"orforkwrench(possiblyincorporated
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.

07/16/15Page 6
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
®®
®®
®
RC160
CAUTION
THE ACCEPTABLE CLAMPING AREAS START 8" (203 MM) FROM EITHER CASE END, TO
AN ADDITIONAL 10" (254 MM) BEYOND THIS POINT. PLACING THE VISETONG ON THE
AREA OF THE CASE WHERE THE PISTON CYCLES CAN DISTORT THE CASE, RESTRICT
PISTON MOVEMENT AND VOID THE WARRANTY.
••
••
•With the chuck secured in the fork wrench, (see figure 2-1) loosen the joint by turning
the case with the visetongs. Remove the hammer from the wrench and reverse the
hammer end to end in the hammer stand / wrench. With the backhead flats secured
in the fork wrench (see figure 2-1), loosen the joint by turning the case with the
visetongs.
••
••
•With the crane or lift truck, move the hammer into an upright position with the chuck
end down. With an adequate lifting device, lift and support the hammer while
unscrewing the chuck. After setting the hammer down, and while lifting and
supporting the backhead, unscrew and remove the backhead from the case.
••
••
•Remove the backhead o-ring and thrust washer from the backhead.
••
••
•Remove the collection tube o-ring from the backhead I.D. on the drill rod mating
end.
••
••
•Remove the check valve seat, the check valve and the check valve spring from the
backhead end of the case. The check valve seat is equipped with two 1/2" (13 mm)
UNC tapped holes for lifting eyes to facilitate removal.
••
••
•Using a small screwdriver, pick the check valve seat o-ring from the outside diameter
of the check valve seat.
Hammer Stand/Wrench Diagram
Figure 2-1
Pulldown Visetongs
Petol No. VTDA120
Force Direction Required:
15,000 - 25,000 lbs.
(6,800 - 11,400 Kg.)
Blocking to
height of stand
Hammer stand and wrench
combination, structural steel,
I-Beam, weld construction
bracing to suit.
Champion
RC160

Page 7
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
07/16/15
Champion
®®
®®
®
RC160
••
••
•Remove the collection tube housing. The collection tube housing is equipped with two
1/2" (13 mm) UNC tapped holes for lifting eyes to facilitate removal.
••
••
•Using a screwdriver, pick the two o-rings from the inside diameters of the collection
tube housing.
••
••
•Remove the belleville washers.
••
••
•Remove the feed tube assembly. The feed tube assembly is equipped with two 1/2"
(13 mm) UNC tapped holes for lifting eyes to facilitate removal.
••
••
•Raisethepistonout of thebackheadend of thecasebyinserting two 8"(203mm) long,
1-1/4" (32 mm) diameter steels rods into the holes inside the piston. Put one rod in the
bottom and another rod 180 degrees opposite in the top hole. Lift the piston out with
nylon straps and a suitable lifting device.
••
••
•Remove the thrust washer from the chuck.
••
••
•Remove the bit retaining rings o-ring from the bit retaining rings.
••
••
•Removal of the chuck bushing is not necessary for routine maintenance. If necessary,
lay the chuck on its side so that the bit end is facing you. Locate the seam in the chuck
bushing. Insert a screwdriver into the slot in the middle of the seam and pry the chuck
bushing from the under cut. Remove the chuck bushing from the bit end of the chuck.
••
••
•Removal of the bit bearing and snap ring in the chuck end of the case is not necessary
routinemaintenance. Ifnecessary, removethesnapringfrom thegroove. Pressthe bit
bearing out the chuck end of the case.
••
••
•Disassembly of the feed tube assembly is not necessary for routine maintenance. If
necessary, support the feed tube housing and suspend it in the air. Remove the feed
tube snap ring with a large screwdriver. Lower the feed tube assembly until the feed
tube contacts the work bench. The weight of the feed tube housing will let it ride down
theoutsideof the feedtube. Wrapa nylonstraparound the flangeofthe feedtubeand
lift it out of the feed tube housing. Slide the feed tube compression ring off the end of
the feed tube. (See figure 3-2 for the feed tube assembly exploded view diagram).
Using a small screwdriver, pick the feed tube o-rings from the grooves in the feed tube
housing and the orifice o-ring from the inside diameter of the feed tube.

07/16/15Page 8
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
®®
®®
®
RC160
INSPECTION
••
••
•All parts should be washed in a clean solvent before they are inspected and
reassembled.
WARNING
USE CLEANING FLUIDS THAT ARE NONFLAMMABLE AND AVOID
BREATHING THE FLUID VAPORS.
••
••
•Handle all parts carefully, hardened parts may chip if dropped on a hard surface.
BACKHEAD
••
••
•Inspect the threads for cracks and burrs.
••
••
•Remove all burrs on the thread area with a fine file.
••
••
•Replace if necessary.
CHECK VALVE SEAT
••
••
•Inspect the outside diameters for nicks, burrs and scoring.
••
••
•Remove all minor irregularities with emery cloth.
••
••
•Replace if necessary.
CHECK VALVE/CHECK VALVE SPRING
••
••
•Inspect the outside diameters for nicks, burrs and scoring.
••
••
•Remove all minor irregularities with emery cloth.
••
••
•Replace if necessary.
COLLECTION TUBE & COLLECTION TUBE HOUSING
••
••
•Inspect the outside diameter for nicks, burrs and scoring.
••
••
•Remove all minor irregularities with emery cloth.
••
••
•Check the I.D. size (at the chuck end) of the collection tube. The tube I.D. should be
no bigger than 4-3/4" (121 mm).
••
••
•Inspect the weld at the collar for cracks.
••
••
•Replace if necessary.

Page 9
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
07/16/15
Champion
®®
®®
®
RC160
BELLEVILLE WASHERS
••
••
•Inspect the belleville washers for severe wear indications or cracks.
••
••
•Replace if necessary.
FEED TUBE ASSEMBLY
••
••
•Inspect all makeup surfaces for indentations or nicks caused by wear.
••
••
•Remove all minor irregularities with emery cloth.
••
••
•Replace if necessary.
PISTON
••
••
•Inspect the striking face, inside and outside diameters for nicks, scoring and cracks.
••
••
•Polish the piston with emery cloth to remove all minor irregularities. Cracked pistons
should be replaced.
••
••
•Wash the piston thoroughly, inside and out, to remove all emery dust.
••
••
•Replace if necessary.
CASE
••
••
•Inspect the outside diameter for excessive wear or cracks. Inspect the internal case
bore for scoring.
••
••
•Remove all minor irregularities with fine honing stones.
••
••
•Clearance between the piston and the case should not exceed .020" (.50 mm).
••
••
•Replace if necessary.
BIT BEARING
••
••
•Inspect the inside and outside diameters for nicks and burrs.
••
••
•Remove all internal irregularities with a fine honing stone.
••
••
•Remove all external irregularities with emery cloth.
••
••
•Clearance between the bit shank and bit bearing should not exceed .030" (.76 mm).
••
••
•Replace if necessary.

07/16/15Page 10
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
®®
®®
®
RC160
SNAP RING
••
••
•Inspect the snap rings for severe wear indications.
••
••
•Replace if necessary.
CHUCK
••
••
•Inspect for cracks and burrs.
••
••
•For continued use, the outside diameter should be larger than or the same as the
outside of the case or the same. Collar length should not be less than 5-1/4" (133 mm).
CAUTION
IF THE COLLAR LENGTH IS LESS THAN 5-1/4" (133 MM) AND THE BIT
IS UNDER LOAD CONDITIONS, CONTACT BETWEEN THE SHOULDER
OFTHEBITRETAININGRINGSANDTHEBOTTOMOFTHEBITRETAINING
RING AREA ON THE BIT, COULD CAUSE THE BIT TO FAIL IN THIS AREA.
••
••
•Torsional play in the splines should not exceed .250" (6.4 mm).
••
••
•Replace if necessary.
CHUCK BUSHING
••
••
•Inspect for damage such as cracks and deformations.
••
••
•Replace if necessary.
O-RINGS
••
••
•Inspect for damage such as cracks and deformations.
••
••
•Replace if necessary.
THRUST WASHERS
••
••
•Inspect for damage such as cracks and deformations.
••
••
•Replace if necessary.
DRIVE PLATES
••
••
•Inspect for damage such as cracks and deformations.
••
••
•Replace if necessary.

Page 11
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
07/16/15
Champion
®®
®®
®
RC160
GENERAL ASSEMBLY INSTRUCTIONS
••
••
•Assembly should be performed in a clean environment.
••
••
•All parts should be cleaned thoroughly and wiped dry before assembly.
••
••
•Oil all parts by hand using Rock Drill Oil to insure easy assembly.
••
••
•Coat all thread connections and thrust washers with a thread compound to allow joints
to thread easily.
FEED TUBE ASSEMBLY
••
••
•Install the feed tube o-rings in the two grooves located in the smallest inside diameter
of the feed tube housing.
••
••
•Insert the orifice o-ring into the groove at the inside diameter of the feed tube.
••
••
•Place the feed tube compression ring over the bottom end of the feed tube then slide
it along the feed tube until it seats against the feed tube collar.
••
••
•Position the piston vertically. Place the smallest outside diameter of the feed tube
housing on the piston so that the bores will align. Insert the small end of the feed tube
into the feed tube housing. Slide the feed tube into the feed tube housing until the feed
tube compression ring seats against the feed tube housing shoulder. While applying
pressureto thefeed tubecollar toexposethesnapringgroove,usealargescrewdriver
to insert the feed tube snap ring. Remove the feed tube assembly from the piston.

07/16/15Page 12
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
®®
®®
®
RC160
HAMMER ASSEMBLY
••
••
•Using the overhead crane, turn the hammer case upside down in a vertical position
so that the bit bearing bore is facing up.
••
••
•Insert the bit bearing into the chuck end of the case. This should be a close slip fit.
Making sure the bearing makes contact with the shoulder provided for it in the case,
insert the snap ring into the groove at the chuck end of the bit bearing diameter.
••
••
•Using the overhead crane, turn the hammer case so that the backhead end is facing
up. The hammer case should still be in a vertical position.
••
••
•Lower the piston into the backhead end of the case using the 8" (203 mm) long,
1-1/4" (32 mm) diameter steel rods and the nylon straps.
••
••
•Install the feed tube assembly into the backhead end of the case, making sure it is
firmly against the shoulder in the case. Due to close tolerances, caution is advised
when inserting the feed tube assembly. It should not be forced into the case.
••
••
•Install the belleville washers in the counter bore of the feed tube assembly. See the
stacking diagram on page 14 for proper installation.
••
••
•Install the collection tube housing o-ring and the collection tube o-ring in the I.D. of
the collection tube housing.
••
••
•Install the collection tube housing. The collection tube housing will rest on the
belleville washers.
••
••
•Place the check valve spring and check valve on the collection tube housing.
••
••
•Install the check valve seat o-ring into the groove on the outside diameter of the
check valve seat.
••
••
•Lower the check valve seat through the check valve and check valve spring. Make
sure the check valve seat is seated into the collection tube housing.
••
••
•Assemble the backhead o-ring into the groove in the backhead. Install the collection
tube o-ring in the groove in the backhead on the drill rod mating end. With the thrust
washer installed on the case shoulder, thread the backhead into the case and tighten
until the shoulder is tight against the case.
NOTE
DUETOTHEINTERNALCOMPRESSIONSPRINGS,THECHAMPIONRC160BACKHEAD
CAN ONLY BE FULLY TIGHTENED WITH A POWER WRENCH ON THE RIG.
CAUTION
LIFTING THE CHAMPION RC160 HAMMER WITH THE THREAD JOINTS LOOSE MAY
CAUSE DAMAGE TO THE THREADS.

Page 13
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
07/16/15
Champion
®®
®®
®
RC160
••
••
•Install the chuck bushing in 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 bit splines. (See Figure 2-2)
••
••
•Place the bit retaining rings, with the o-ring installed, over the chuck.
••
••
•Place the thrust washer against the chuck thread shoulder. With the crane or lift truck
and appropriate lifting device, raise the hammer to allow clearance for the chuck.
Place the chuck beneath the hammer, thread the hammer down on the chuck
threads until flush to the thrust washer.
••
••
•With the hammer in a vertical position and the bit installed, insert the collection tube.
NOTE
THE COLLECTION TUBE SHOULD BE ASSEMBLED WITH THE BIT INSTALLED IN THE
HAMMER AS THE COLLECTION TUBE, WHEN ASSEMBLED, PROTRUDES FROM THE
BOTTOM END OF THE HAMMER, 4" (102 mm).
NOTE
LUBRICATING THE OUTSIDE DIAMETER OF THE COLLECTION TUBE PRIOR TO
ASSEMBLY IS NECESSARY TO FACILITATE ASSEMBLY.
CAUTION
DUE TO CLOSE TOLERANCES BETWEEN THE CHAMPION RC160 INTERNAL PARTS
AND THE CASE, NUMA CANNOT ACCEPT RESPONSIBILITY FOR DAMAGE CAUSED
BYWELDINGON THECASEOD. WELDING ONTHECASE CANCREATEDISTORTION,
CAUSE PREMATURE FAILURE AND VOID THE WARRANTY. CONTACT NUMA FOR
SPECIAL INSTRUCTIONS IF WELDING THE CASE BECOMES UNAVOIDABLE.
RC160 Drive Plate Positioning as Viewed from Top
Figure 2-2

07/16/15Page 14
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
®®
®®
®
RC160
SECTION III
PARTS IDENTIFICATION
EXPLODED VIEW
Check Valve
009616 (1)
Collection Tube O-Ring
009624 (1)
Collection Tube Housing
O-Ring 009623 (1)
Check Valve Spring
009619 (1)
Collection Tube
018638 (1)
Backhead
017396 (1)
Collection Tube Housing
009617 (1)
Collection Tube
O-Ring
009624 (1)
Check Valve Seat O-Ring
009621 (1)
Check Valve Seat
009615 (1)
Backhead O-Ring
008158 (1)
Thrust Washer - Brass
008152 (1)
Hammer Assembly #017397
Figure 3-1
Chuck Bushing
008151 (1)
Chuck
008142 (1)
Case
009937 (1)
Belleville Washers
009618 (2)
Piston
009610 (1)
See Exploded View
Figure 3-2
Page 15
Thrust Washers-Brass
008152 (1)
Bit Retaining Rings
O-Ring
008158 (1)
Bit Retaining Rings
008150 (1)
Snap Ring
008149 (1)
Bit Bearing
008148 (1)
Exploded
View of
Belleville Washers
Correct
Stacking

Page 15
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
07/16/15
Champion
®®
®®
®
RC160
FeedTubeAssembly
009627(1)
FeedTubeSnap Ring
009625(1)
FeedTube
009612(1)
OrificeO-Ring
009624(1)
Feed Tube Compression Ring
009626(1)
FeedTubeO-Rings
009622(2)
FeedTubeHousing
009613(1)
SECTION III
PARTS IDENTIFICATION
EXPLODED VIEW
Figure 3-2

07/16/15Page 16
MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
Champion
®®
®®
®
RC160
SECTION IV
AIR CONSUMPTION CHARTS
CHAMPION RC160
NOTE
Numa RC hammers utilize an orifice o-ring as a choke. Removal of the orifice
o-ring allows additional air to pass through the hammer for hole cleaning/
flushing purposes.
* Operation Above 200 PSI (13.8 BAR) Is Not Recommended.