Numa Patriot 180 Maintenance manual

MANUFACTURER OF DOWN HOLE HAMMERS AND BITS
©2016 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
Patriot180
CARE & MAINTENANCE
INSTRUCTIONS

Patriot®180
TABLE OF CONTENTS Page
Section I Description ..................................................................... 1
Functional Description ............................................................. 2
1. Backhead ........................................................................ 2
2. Pin ..................................................................................... 2
3. Check Valve ................................................................... 2
4. Check Valve Spring........................................................ 2
5. Choke .............................................................................. 2
6. Check Valve Guide........................................................ 2
7. Feed Tube ........................................................................ 2
8. Piston ................................................................................ 3
9. Case ................................................................................. 3
10. Bit Bearing........................................................................ 3
11. Snap Ring ........................................................................ 3
12. Bit Retaining Rings........................................................... 3
13. Thrust Washers - Brass..................................................... 3
14. Chuck............................................................................... 3
15. Chuck Bushing ................................................................ 4
16. Drive Plates ...................................................................... 4
Section II Maintenance................................................................. 4
Disassembly .............................................................................. 4
Inspection.................................................................................. 8
General Assembly.................................................................. 11
Hammer Assembly ................................................................. 11
Backhead / Feed Tube Assembly ........................................ 12
Section III Parts Identication ................................................... 15
Patriot 180 Exploded View ..................................................... 15
Part Number Reference ......................................................... 15
Section IV Air Consumption Chart.......................................... 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 Patriot 180 Recommended Spares................ 21

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 tness for a particular
purpose.
Any alteration or modication of the original product without the express written consent of
Numa will void this warranty.
REMEDY
If, during such warranty period, Buyer promptly noties 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 fulllment 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 prots 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 dened as follows:
WARNING A specic procedure or practice that must be strictly followed,
or a specic condition that must be met, to prevent possible
bodily harm.
CAUTION A specic procedure or practice that must be strictly followed,
or a specic condition that must be met, to prevent damage
to the equipment.
NOTE Important supplemental information.
Numa®,Champion, and Patriot are registered trademarks of Numa.

09/19/16 Page 1
Patriot®180
SECTION I
DESCRIPTION
GENERAL DESCRIPTION
The Patriot 180 is a valveless, pneumatically operated tool designed to utilize Numa 18"
to 30" (457 mm to 762 mm) diameter bits in rock formations under a wide range of operating
conditions.
The Patriot 180 hammer design incorporates a non-reversible, hardened case. The single
bore design allows for a maximum bore diameter in conjunction with optimum life against
abrasion. The simple design of the Patriot 180 provides performance and dependability
without sacricing tool life.
The Patriot 180 is designed for universal applications using air pressure from 100 PSI
to 250 PSI (6.8 Bar to 17.2 Bar) with compressors having capacities of 1350 CFM (637 Litres/
Second) or more. When drilling conditions require supplementary hole cleaning, additional
hole cleaning air can be passed through the hammer by utilizing an interchangeable choke.
All standard hammers shipped from Numa have a blank choke installed. Refer to page 15
for correct choke selection and pages 7 and 12 to facilitate the removal and the installation
of the choke. The Patriot 180 hammer is a high performance tool which may require additional
downfeed to maximize performance. Please contact your local Numa Representative for
further details.
Patriot 180
Weight w/o Bit 2,523 lbs. (1144 kg)
Outside Diameter 15-1/2" (394 mm)
Hammer Length:
Shoulder to Shoulder 65-15/16" (167 cm)
Shoulder to Bit Face 75-15/16" (193 cm)
Backhead API Thread 8-5/8 API REG
Table 1-1 General Hammer Specications
18" (457 mm) 1029 lbs. (468 kg) 26" (661 mm) 1751 lbs. (796 kg)
20" (508 mm) 1254 lbs. (570 kg) 28" (711 mm) 2007 lbs. (912 kg)
22" (559 mm) 1347 lbs. (612 kg) 30" (762 mm) 2275 lbs. (1034 kg)
24" (610 mm) 1616 lbs. (735 kg)
Table 1-2 General Bit Specications
NOTE
NUMA 18" TO 30" (457 MM TO 762 MM) BITS ARE AVAILABLE IN CONCAVE FACE
DESIGN WITH LARGE AIR FLUSHING HOLES AND CHIP WAYS TO TAKE ADVANTAGE
OF THE PATRIOT 180 PERFORMANCE. OTHER SIZES MAY BE AVAILABLE UPON
REQUEST.

Page 2 09/19/16
Patriot®180
FUNCTIONAL DESCRIPTION
1. BACKHEAD
The backhead connects the hammer to the drill rod. It is threaded into the top end of
the case with double start threads and into the drill rod with a standard 8-5/8 API REG
thread. Wrench ats are provided for disassembling.
2. PIN
The pin aligns the feed tube assembly into the backhead. It is made of hardened
steel to insure long life.
3. CHECK VALVE
The check valve maintains pressure in the hammer when the air supply has been shut
off. The pressure 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. CHOKE
The interchangeable choke is located in the tip of the feed tube and is held in place
with a press t. A set of two chokes is supplied with each hammer. By installing the
correct choke, the hammer can be ne tuned to the compressor package.
6. CHECK VALVE GUIDE
The check valve guide is seated in the feed tube, and maintains the proper location
of the check valve and check valve spring.
7. FEED TUBE
The feed tube supplies the main air into the chambers located in the piston. It is
connected to the backhead by the pin. The feed tube is designed with a long bearing
surface to maintain alignment in the backhead.

09/19/16 Page 3
Patriot®180
9. 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. A snap ring inserted in the main
bore prevents the piston from sliding out of the case when the chuck, bit, bit retaining
rings and bit bearing are removed.
9. 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. Double start threads on each end of the case allow for ease
of disassembly.
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.
11. 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 and bit are removed.
12. 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.
13. 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.
14. CHUCK
The chuck threads into the bottom end of the case with double start threads. It has
internal splines that mesh with the splines on the bit body to transmit rotation.
Patriot180

Page 4 09/19/16
Patriot®180
15. 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.
16. 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 is provided with each bit.

09/19/16 Page 5
Patriot®180
SECTION II
MAINTENANCE
DISASSEMBLY
•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.
If not possible, see hammer breakout drawing Figure 2-1.
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.
•Maintenance should be performed in a clean environment.
• 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, rubber mallet, 2" (51 mm) diameter
brass rod or mild steel rod 3 to 5 feet (1 m to 1.5 m) long, a drift pin, a small screwdriver,
a pry bar, and a nylon strap capable of lifting 5,000 lbs.
•Clean the outside of the hammer. This will insure a good surface to clamp on.
Hammer Breakout Drawing
Figure 2-1
Pulldown Visetongs
Petol No. VTDA120
Force Direction Required:
15,000 - 25,000 lbs.
(6,810 - 11,350 Kg.)
Blocking to
height of stand
Hammer stand and wrench
combination, structural steel,
I-Beam, weld construction
bracing to suit.

Page 6 09/19/16
Patriot®180
•Using an overhead crane or lift truck of appropriate capacity, place the hammer
horizontally on a hammer stand and secure the hammer in the wrench. The chuck
end can be held by the 14-1/2" (368 mm) ats, in the wrench. The backhead is also
held in the 14-1/2" (368 mm) wrench except with the addtion of at stock between the
wrench and the backhead ats (as the backhead ats 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 acceptable clamping area of the case.
Break the chuck and backhead loose, but do not remove.
CAUTION
THE ACCEPTABLE CLAMPING AREAS START 10" (254 MM) FROM EITHER CASE END,
TO AN ADDITIONAL 5" (127 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.
•With the hammer standing in the vertical position, using an overhead crane and
handling plug, unscrew and remove the chuck/bit assembly from the case.
•Remove the bit retaining rings from around the bit.
•Remove the o-ring from the bit retaining rings.
•Remove the chuck from the bit.
•Remove the drive plates from the bit and chuck splines.
•Remove the brass thrust washer from the chuck.
•Using the overhead crane and handling plug, unscrew the backhead / feed tube
assembly from the case.
•Place the hammer horizontally on a hammer stand and secure the hammer with a
chain vise.
•With the case in a horizontal position and using a 2" (51 mm) diameter brass rod, slide
the piston out of the backhead end of the case. Using the nylon strap and overhead
crane, remove the piston from the case.
•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.

09/19/16 Page 7
Patriot®180
•Removal of the bit bearing and snap ring from the chuck end of the case is not
necessary for routine maintenance. If necessary, locate the disassembly notch where
the snap ring is located. Using a pry bar, pry the snap ring out of the groove, and
remove from case. Using a 2" (51 mm) diameter brass rod, go into the case from the
backhead end, tapping the bit bearing out of the chuck end of the case.
•To disassemble the backhead / feed tube assembly, lay the backhead / feed tube
assembly on a workbench.
•Using a drift pin, tap the pin out of the backhead/feed tube assembly.
•Using the 2" (51 mm) diameter brass rod, go through the API thread end of the
backhead, and tap the feed tube assembly out.
•Remove the check valve and check valve spring from the feed tube assembly.
•Removal of the check valve guide, and choke are not necessary for routine
maintenance. If necessary, use a 1/2" (13 mm) diameter, 36" (914 mm) long rod
and tap the choke downward, toward the check valve guide. Continue tapping the
choke and check valve guide out of the feed tube.
•Remove the o-ring from the groove located on the outside diameter of the feed tube.
•Remove the brass thrust washer from the backhead.
•Remove the backhead o-ring from the backhead outside diameter.

Page 8 09/19/16
Patriot®180
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 and pin hole for cracks and burrs.
• Remove all burrs on the thread with a ne le or emery cloth.
•Replace if necessary.
CHECK VALVE
•The check valve should be smooth and free from abrasions.
•Replace if necessary.
•Replace the check valve spring if it is worn or broken.
FEED TUBE ASSEMBLY
•Inspect the outside diameter for nicks, burrs and scoring.
•Inspect all makeup surfaces for indentations or nicks caused by wear.
•Remove all minor irregularities with emery cloth.
•Replace if necessary.
PIN
•Inspect pin for scoring or cracks.
•Replace if necessary.

09/19/16 Page 9
Patriot®180
SNAP RING
•Inspect the snap ring for severe wear indications.
•Remove or round over any sharp edges.
•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.
CASE
•Inspect the outside diameter for excessive wear or cracks. Inspect the internal case
bore for scoring.
• Remove all minor irregularities with ne honing stones.
•Clearance between the piston and the case should not exceed 0.020" (0.5 mm).
•Replace if the outside diameter is worn to 14-3/4" (375 mm) or less near the chuck
end.
BIT BEARING
•Inspect the inside and outside for nicks and burrs.
• Remove all internal irregularities with a ne honing stone.
•Remove all external irregularities with an emery cloth.
•Clearance between the bit shank and bit bearing should not exceed 0.030" (0.76 mm).
•Replace if necessary.

Page 10 09/19/16
Patriot®180
BIT RETAINING RINGS
•Inspect for cracks or deformations.
• Remove all irregularities with a le or emery cloth.
•Replace if necessary.
CHUCK
•Inspect the chuck bushing for cracks or irregularities. Replace if necessary.
•Inspect for cracks and burrs.
•For continued use, the outside diameter should be larger than 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 OF
THE BIT RETAINING RINGS AND THE BOTTOM OF THE BIT RETAINING
RING AREA ON THE BIT, COULD CAUSE THE BIT TO FAIL IN THIS AREA.
•Torsional play in the splines should not exceed 0.250" (6.4 mm).
•Replace if necessary.
O-RINGS
•Inspect for damage such as cracks and deformations.
•Replace if necessary.
THRUST WASHERS - BRASS
•Inspect for damage such as cracks and deformations.
•Replace if necessary.

09/19/16 Page 11
Patriot®180
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 with a thread compound to allow joints to thread easily.
HAMMER ASSEMBLY
• Using the 2" (51 mm) brass rod, tap the slip t bearing into the chuck end of the case.
•Using a pry bar, install the snap ring into the snap ring groove located against the bit
bearing.
•Install the thrust washer against the shoulder of the chuck 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 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 2-3.
•Place the bit retaining rings, with the bit retaining ring o-ring installed, over the bit, and
on top of the chuck.
Drive Plate Positioning as Viewed from Top of Chuck
Figure 2-3

Page 12 09/19/16
Patriot®180
BACKHEAD / FEED TUBE ASSEMBLY
•Place the backhead on its side on the bench. Install the backhead o-ring into the
groove located on the outside thread diameter.
•Place the thrust washer over the backhead until it rests against the backhead shoulder.
•Install the feed tube o-ring into the groove located on the outside of the feed tube.
• Drop the choke into the feed tube, and using the 1/2" (13 mm) diameter rod, tap the
choke into place.
• Insert the check valve guide into the feed tube over choke.
•Install the check valve spring and check valve into the feed tube.
• Using a rubber mallet, tap the feed tube into the backhead, aligning the hole in the
feed tube with the hole in the backhead. See Figure 2-4 for proper pin hole selection.
The P180 feed tube line must be aligned with the backhead line. When the P180 feed
tube is positioned correctly, the face on the feed tube is recessed in 1" (25 mm) from
the end face of the backhead as shown in Figure 2-5.
•Using a rubber mallet, tap the pin into the hole.
Figure 2-4
P180 Pin Hole Location

09/19/16 Page 13
Patriot®180
P180
P185
P180
P185
Figure 2-5

Page 14 09/19/16
Patriot®180
HAMMER ASSEMBLY CONTINUED
•Place the hammer horizontally on a hammer stand and secure with a vise.
CAUTION
THE ACCEPTABLE CLAMPING AREAS START 10" (254 MM) FROM EITHER CASE END,
TO AN ADDITIONAL 5" (127 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.
•Slide the piston in the backhead end of the case. Push the piston all the way to the
chuck end. The piston should ride in the case very smoothly.
•Using an overhead crane, stand the case up in a vertical postion with the chuck end
on the ground.
•Using an overhead crane and a handling plug, lower the backhead / feed tube
assembly into the case. Thread the backhead / feed tube assembly into the case
until it shoulders up against the thrust washer.
•Using an overhead crane and a handling plug, lift the hammer over the bit and chuck
assembly. Lower the hammer onto the chuck, and thread together until it shoulders
up against the thrust washer.
CAUTION
DUE TO CLOSE TOLERANCES BETWEEN THE PATRIOT 180 INTERNAL PARTS AND
THE CASE, NUMA CAN NOT ACCEPT RESPONSIBILITY FOR DAMAGE CAUSED BY
WELDING ON THE CASE OD. WELDING ON THE CASE CAN CREATE DISTORTION,
CAUSE PREMATURE FAILURE AND VOID THE WARRANTY. CONTACT NUMA FOR
SPECIAL INSTRUCTIONS IF WELDING THE CASE BECOMES UNAVOIDABLE.

09/19/16 Page 15
Patriot®180
Backhead 8-5/8 Reg. Pin
012448 (1)
Thrust Washer
- Backhead End
012451 (1)
Backhead O-Ring
008158 (1)
Pin
012403 (1)
Check Valve
018121 (1)
Check Valve Spring
018122 (1)
Feed Tube Assembly
019186 (1)
Check Valve Guide
018015 (1)
Feed Tube O-Ring
009624 (1)
Choke
008164 (1)
Feed Tube
019095 (1)
Piston
012449 (1)
Case
012450 (1)
Bit Bearing
008148 (1)
Snap Ring
008149 (1)
Bit Retaining Rings
O-Ring
008158 (1)
Bit Retaining Rings
008150 (1)
Thrust Washer
- Chuck End
008152 (1)
Chuck
008142 (1)
Chuck Bushing
008151 (1)
SECTION III
PARTS IDENTIFICATION
EXPLODED VIEW
Hammer Assembly #015654
Figure 3-1
Patriot180

Page 16 09/19/16
Patriot®180
SECTION IV
AIR CONSUMPTION CHARTS
PATRIOT 180
DRILL PRESSURE (BAR)
6.9 10.3 13.6 17.2
DRILL PRESSURE (PSI)
100 150 200 250
CFM
L/SEC
2265
1888
1512
1132
756
378
4800
4000
3200
2400
1600
800
SOLID CHOKE
1
21/2 (12.7mm) CHOKE
2
1