NPK E Series User manual

HYDRAULIC HAMMER
OPERATORS MANUAL
E SERIES HAMMERS
E200
E204
E201
E205
E202
E207
E203
“Use Genuine NPK Parts”
© Copyright 2020 NPK Construction Equipment, Inc. www.npkce.com H033-9600F E200 - E207 SM E
Hyd Ham Operators Manual 11-20
7550 Independence Drive
Walton Hills, OH 44146-5541
Phone [phone]
Fax [phone]

- 1 -
CONTENTS
SAFETY.......................................................................................................................... 3
INTRODUCTION.............................................................................................................5
CARRIER MACHINE COMPATIBILITY ..........................................................................6
HAMMER SPECIFICATIONS .........................................................................................7
STRUCTURE..................................................................................................................8
STRUCTURAL DRAWING.......................................................................................... 8
MODELS E200 –E203............................................................................................8
MODELS E204 –E205............................................................................................9
MODELS E207.......................................................................................................10
HAMMER SERIAL NUMBER LOCATION.....................................................................11
SERIAL NUMBER LOCATION (sn1)........................................................................11
HYDRAULIC INSTALLATION.......................................................................................12
BACKHOE/EXCAVATOR HAMMER LINES.............................................................12
SKID STEER HAMMER LINES ................................................................................12
HAMMER CONTROL VALVE...................................................................................12
SKID STEER HAMMER FLOW CONTROL VALVE (OPTIONAL)............................13
PREVENTION OF CONTAMINATION......................................................................14
HYDRAULIC QUICK DISCONNECTS......................................................................15
MOUNTING INSTALLATION........................................................................................17
BACKHOES and EXCAVATORS.............................................................................. 17
SKID STEERS.......................................................................................................... 17
REMOVAL FROM THE CARRIER................................................................................ 17
BACKHOES and EXCAVATORS.............................................................................. 17
REMOVAL FROM THE SKID STEER ......................................................................18
MOUNTING TO THE CARRIER...............................................................................18
BACKHOES and EXCAVATORS...........................................................................18
MOUNTING TO THE SKID STEER.......................................................................... 18
LUBRICATION.............................................................................................................. 19
GREASING PROCEDURE....................................................................................... 19
CORRECT FUNCTION OF GREASING AND GREASE INTERVALS...................... 20
CORRECT GREASE FOR HYDRAULIC HAMMERS............................................... 20
NPK HAMMER GREASE.......................................................................................21
AUTO LUBE SYSTEMS............................................................................................22
AUTO LUBE GREASE LINE PRE-FILLING.............................................................. 23
HAMMER MOUNTED AUTO LUBE GREASE LINE PRE-FILLING.......................... 26
PRIMING THE GREASE LINE...............................................................................26
LUBRICANT TERMS AND DEFINITIONS................................................................ 28
AUTO LUBE / UNDERWATER PORT IDENTIFICATION.............................................30
HIGH HEAT APPLICATION..........................................................................................31
START-UP OPERATION.............................................................................................. 32
HAMMERS THAT ARE NEW, REBUILT, OR HAVE BEEN INACTIVE....................32
BEFORE STARTING THE HAMMER....................................................................... 33
DAILY START-UP PROCEDURE............................................................................. 33
OPERATION.................................................................................................................34
SAFE OPERATING INSTRUCTIONS.......................................................................34
OPERATING TECHNIQUES & PRECAUTIONS...................................................... 35
TAMPER PAD OPERATION.....................................................................................40
IMPACT ENERGY TRANSMISSION THROUGH TOOLS............................................ 41

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IMPACT STRESS WAVES AT THE END OF THE TOOL........................................ 42
TOOL BREAKAGE........................................................................................................ 43
TOOL BREAKAGE DUE TO EXCESSIVE BENDING MOMENT..............................43
CHARACTERISTICS OF THE BROKEN SECTION................................................. 43
TOOL BREAKAGE DUE TO EXCESSIVE WEAR OF THE TOOL HOLDER
BUSHINGS...............................................................................................................44
CHIPPING IN RETAINING PIN SLOT......................................................................46
DEFORMATION OF THE RETAINING PIN SLOT SIDES........................................46
DEFORMATION OF THE TOOL TIP........................................................................ 47
CHIPPING OF A MOIL POINT TOOL TIP ................................................................ 48
CHIPPING OF A CHISEL TOOL TIP........................................................................48
TEMPERATURE RELATED TOOL PROBLEMS......................................................49
TOOL BREAKAGE DUE TO CORROSION.............................................................. 50
TOOL BREAKAGE DUE TO DEFECTIVE MATERIAL.............................................50
ROUTINE INSPECTION AND MAINTENANCE............................................................51
WEEKLY INSPECTION ................................................................................................52
TYPES AND APPLICATIONS OF TOOL...................................................................... 53
STANDARD TOOLS................................................................................................. 53
ACCESSORY TOOLS ..............................................................................................53
TOOL IDENTIFICATION...............................................................................................54
TOOLS..........................................................................................................................55
CHANGING THE TOOL............................................................................................55
MAXIMUM TOOL TO TOOL BUSHING CLEARANCE.............................................56
TOOL INSPECTION ................................................................................................. 58
CHISEL TOOL SHARPENING.................................................................................. 59
STANDARD LENGTH FOR NPK TOOLS................................................................. 60
TOOL RETAINING PIN INSPECTION...................................................................... 61
TORQUE VALUES FOR HAMMER FASTENERS........................................................62
GAS CHARGE ..............................................................................................................63
NITROGEN GAS PRESSURE.................................................................................. 63
GAS CHARGING KIT ............................................................................................... 63
CHECKING THE GAS PRESSURE.......................................................................... 64
CHARGING THE HAMMER...................................................................................... 66
DISCHARGING THE GAS PRESSURE ................................................................... 67
STORAGE OF HYDRAULIC HAMMER........................................................................ 68
WARRANTY REGISTRATION FOR NEW UNITS ........................................................ 69
TOOL WARRANTY....................................................................................................... 70
WARRANTY STATEMENTS......................................................................................... 72
NOTES AND RECORDS .............................................................................................. 76

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SAFETY
Safety notices in NPK Instruction Manuals follow ISO and ANSI standards for
safety warnings:
DANGER (red) notices indicate an imminently hazardous situation
which, if not avoided, will result in death or serious injury.
WARNING (orange) notices indicate a potentially hazardous situation
which, if not avoided, could result in death or serious injury.
CAUTION (yellow) notices indicate a potentially hazardous situation,
which, if not avoided, may result in minor or moderate injury.
ATTENTION (blue) notices in NPK Instruction Manuals are an NPK
standard to alert the reader to situations which, if not avoided, could
result in equipment damage.
WARNING and BASIC OPERATING INSTRUCTIONS decals are included with each
NPK hammer and installation kit. Decals must be installed in the cab, visible to the
operator while operating the hammer.
STAY CLEAR, PRESSURE VESSEL, GAS PRESSURE and TOOL SHARPENING
decals are installed on all NPK hammer models. Keep them clean and visible. NPK will
provide decals free of charge as needed.
1. Operator and Service personnel must read and understand the NPK INSTRUCTION
MANUAL to prevent serious or fatal injury.
2. FLYING DEBRIS CAN CAUSE SERIOUS OR FATAL INJURY.
•Keep personnel and bystanders clear of hammer while in operation.
•Do not operate HAMMER without an impact resistant guard between HAMMER
and operator. NPK recommends LEXANor equivalent material, or steel mesh.
Some carrier manufacturers offer demolition guards for their machine. Check with
the carrier manufacturer for availability. If not
available, please call NPK.
3. Do not hardface or sharpen the tool point with a cutting
torch. Excessive heat from torching or welding can
cause embrittlement, breakage, and flying pieces.
Resharpen by milling or grinding only, using sufficient
coolant.

- 4 -
SAFETY
4. Fully extend the tool while charging the HAMMER with nitrogen gas. Be sure that
the retaining pin is installed. STAY CLEAR OF TOOL POINT WHILE CHARGING.
5. Do not disassemble a HAMMER before discharging the hammer gas pre-charge.
6. USE NITROGEN GAS ONLY! Store and handle nitrogen tanks per OSHA
regulations.
7. Avoid high pressure fluids. Escaping fluid under pressure can penetrate the skin
causing serious injury. Relieve pressure before disconnecting hydraulic or other
lines.
8. Operate HAMMER from operator’s seat only.
9. Match HAMMER size to carrier according to NPK recommendations. The carrier
must be stable during hammer operation and during transport.
See CARRIER MACHINE COMPATIBILITY section of the NPK instruction manual.
10. Do not make any alterations to the TOOL without authorization from NPK
Engineering.
11. Use proper lifting equipment and tools when handling or servicing the HAMMER.
12. Wear ear protection and safety glasses when operating the hammer. Consult
OSHA/MSHA regulations when applicable.
13. Beware of flying metal pieces when driving Boom Pins.
14. If modifications are to be made, do not alter the HAMMER without authorization
from NPK Engineering!
15. Use only genuine NPK replacement parts. NPK specifically disclaims any
responsibility for any damage or injury that results from the use of any tool or parts
not sold or approved by NPK.
For further safety information, consult the AEM Hydraulic Mounted Breakers Safety
Manual, AEM form MB-140 (NPK P/N H050-9600), which is furnished with every NPK
hammer. To request an additional copy, please contact NPK at 440-232-7900 or
Internet at www.npkce.com.

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INTRODUCTION
NPK is a leading manufacturer of HYDRAULIC HAMMERS and has the most complete
product line available anywhere. The success of NPK is due to our commitment to
quality, dependability and long life. The HYDRAULIC HAMMER has many unique
designed features and it is a company philosophy that the NPK HYDRAULIC HAMMER
can be brought to "like new” condition long after competitive products are scrapped.
You can feel confident that you have purchased the best value available.
This comprehensive operator’s manual contains instructions for operating and
maintaining NPK HYDRAULIC HAMMERS. This manual includes helpful information
for obtaining the full potential and efficiency from NPK HYDRAULIC HAMMERS.
Please read this manual thoroughly to understand the NPK HAMMER and its operating
principles before using it.
For additional information or help with any problem encountered, please contact your
NPK authorized dealer.
Whenever repair or replacement of component parts is required, only NPK parts should
be used. NPK is not responsible for failures resulting from substitution of parts not sold
or approved by NPK.
This manual will also assist NPK Dealers and Customers to obtain the longest possible
life from the NPK Demolition Tools.
Customers can use this manual to take corrective action when tool breakage occurs.
Dealers can use this manual to determine if tool breakage can be claimed under
warranty.
Refer to the NPK Demolition Tool Warranty Statement found later in this manual for the
specifics of the warranty coverage.

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CARRIER MACHINE COMPATIBILITY
These carrier weight ranges are intended as a guideline only. Other factors, such as
stick length, counterweights, undercarriage, etc., must be taken into consideration.
Mounting a HAMMER that is too heavy for the carrier machine
can be dangerous and damage the machine. Verify carrier
stability with hammer before transport or operation.
Mounting a HAMMER that is too small for the carrier machine can damage the
HAMMER, cause tool breakage and void Warranties. Please consult NPK Engineering
for specific detailed information.
CARRIER WEIGHT - lbs. (kg)
HAMMER
MOUNTING
RECOMMENDED RANGE
MODEL
STYLE
lb
(kg)
E200
Excavator
2,200 - 4,400
(1,000 - 2,000)
Skid Steer
2,400 - 3,500
(1,100 - 1,600)
E201
Excavator
2,800 - 5,500
(1,300 - 2,500)
Skid Steer
3,000 - 5,500
(1,350 - 2,500)
E202
Excavator
5,400 - 9,000
(2,450 - 4,100)
Skid Steer
5,000 - 7,500
(2,300 - 3,400)
E203
Excavator
6,600 - 12,000
(3,000 - 5,500)
Skid Steer
6,000 - 9,000
(2,700 - 4,100)
E204
Excavator
8,800 - 15,000
(4,000 - 7,000)
Skid Steer
8,000 - 14,000
(3,600 - 6,400)
Backhoe
9,000 - 15,000
(4,100 - 7,000)
E205
Excavator
13,000 - 22,000
(6,000 - 10,000)
Backhoe
13,000 - 20,000
(6,000 - 9,000)
E207
Excavator
22,000 - 31,000
(10,000 - 14,000)
Backhoe
20,000 - 25,000
(9,000 - 11,500)
*Specifications are subject to change without notice.

- 7 -
HAMMER SPECIFICATIONS
HAMMER
IMPACT
FREQUENCY
MOUNTING
WORKING
TOOL
MODEL
ENERGY
STYLE
WEIGHT
DIA.
WORKING
CLASS
LENGTH
ft. lb.
bpm
lbs.
(kg)
in.
(mm)
in.
(mm)
E200
150
480 - 1,200
Excavator
500
(225)
1.65
(42)
12.2
(311)
Skid Steer
235
(107)
E201
200
500 - 1,200
Excavator
270
(125)
1.85
(47)
13.1
(333)
Skid Steer
550
(250)
E202
350
600 - 1,200
Excavator
425
(195)
2.24
(57)
13.6
(346)
Skid Steer
725
(330)
E203
750
560 - 1,200
Excavator
525
(240)
2.60
(66)
14.4
(367)
Skid Steer
800
(365)
E204
1300
530 - 1,200
Excavator
800
(365)
2.99
(76)
16.1
(408)
Skid Steer
1,075
(490)
Backhoe
800
(365)
E205
1,300
430 - 1,050
Excavator
1,200
(545)
3.39
(86)
18.0
(458)
Backhoe
1,150
(520)
E207
2,000
500 - 840
Excavator
2,100
(955)
4.17
(106)
19.6
(500)
Backhoe
1,850
(840)
HAMMER
OIL FLOW
HYDRAULIC OPERATING
MINIMUM CIRCUIT
MODEL
PRESSURE1
RELIEF2
gpm
(lpm)
psi
(bar)
psi
(bar)
E200
2.5 - 7
(10 - 25)
1,650
(115)
2,150
(150)
E201
4 - 9
(15 - 35)
1,500
(105)
2,000
(140)
E202
7 - 13
(25 - 50)
1,750
(120)
2,250
(155)
E203
8 - 17
(30 - 65)
1,900
(130)
2,400
(165)
E204
12 - 26
(45 - 100)
1,900
(130)
2,400
(165)
E205
13 - 32
(50 - 120)
2,400
(165)
2,900
(200)
E207
24 - 40
(90 - 150)
2,400
(165)
2,900
(200)
NITROGEN GAS PRE-CHARGE
HAMMER
AT AMBIENT TEMPERATURE
(cold before operating)
AT OPERATING TEMPERATURE (hot,
after 1 to 2 hrs. operation)
MODEL
psi
(bar)
psi
(bar)
E200
350
(24)
405
(28)
E201
350
(24)
405
(28)
E202
350
(24)
405
(28)
E203
350
(24)
405
(28)
E204
350
(24)
405
(28)
E205
375
(26)
435
(30)
E207
390
(27)
450
(31)
* Specifications subject to change without notice.
NOTES:
1. Hydraulic operating pressure maximum is inlet pressure at the hammer with the oil at operating
temperature and with the gas charge set at the hot operating pressure. See “CHECKING THE
HYDRAULIC PRESSURES”section in this manual.
2. Circuit relief pressure is at least 500 psi (35 bar) above hammer operating pressure.
3. Cold gas charge is the initial set with the hammer at ambient temperature.
4. Hot gas charge is checked after 1 to 2 hours of running and with a system oil temperature of 140
to 180F (60  to 80  C). This is the preferred check.
5. Gas pressures listed are the maximum allowed. Use tolerance of plus 0, minus 25 psi (2 bar).

- 8 -
STRUCTURE
STRUCTURAL DRAWING
MODELS E200 –E203
5
OUT PORT
6
IN PORT
30
GREASE FITTING
A
MAIN BODY
AA
PLUNGER BUSHING
B
DRAIN PLUG
BB
PLUNGER
C
TOOL HOLDER
D
RETAINING PIN
E
RETAINING RING
F
UPPER TOOL BUSHING
G
LOWER TOOL BUSHING
HH
TOOL
J
IMPACT RING (SPACER SECTION)
L
GAS HEAD
M
CHARGE VALVE
N
PISTON
O
MAIN BODY SLEEVE (A)
P
MAIN BODY SLEEVE (B)
Q
TIE ROD
R
TOP NUT
U
WASHER
W
VALVE BODY
Y
VALVE BOTTOM CAP
Z
VALVE SPOOL

- 9 -
STRUCTURE
STRUCTURAL DRAWING
MODELS E204 –E205
30
GREASE FITTING
A
MAIN BODY
AA
PLUNGER BUSHING
B
DRAIN PLUG
BB
PLUNGER
C
TOOL HOLDER
D
RETAINING PIN
DD
SWIVEL ELBOW
E
RETAINING RING
F
UPPER TOOL BUSHING
G
LOWER TOOL BUSHING
HH
TOOL
J
IMPACT RING (SPACER SECTION)
L
GAS HEAD
M
CHARGE VALVE
N
PISTON
O
MAIN BODY SLEEVE (A)
P
MAIN BODY SLEEVE (B)
Q
TIE ROD
R
TOP NUT
U
WASHER
W
VALVE BODY
Y
VALVE BOTTOM CAP
Z
VALVE SPOOL

- 10 -
STRUCTURE
STRUCTURAL DRAWING
MODELS E207
30
GREASE FITTING
A
MAIN BODY
AA
PLUNGER BUSHING
B
DRAIN PLUG
BB
PLUNGER
C
TOOL HOLDER
D
RETAINING PIN
DD
SWIVEL ELBOW
E
RETAINING RING
F
UPPER TOOL BUSHING
G
LOWER TOOL BUSHING
HH
TOOL
HQ
HELICOIL
J
IMPACT RING (SPACER SECTION)
L
GAS HEAD
M
CHARGE VALVE
N
PISTON
O
MAIN BODY SLEEVE (A)
P
MAIN BODY SLEEVE (B)
Q
TIE ROD
R
TOP NUT
S
LOCK PLATE
W
VALVE BODY
Y
VALVE BOTTOM CAP
Z
VALVE SPOOL

- 11 -
HAMMER SERIAL NUMBER LOCATION
SERIAL NUMBER LOCATION (sn1)

- 12 -
HYDRAULIC INSTALLATION
Hydraulic installation kits are available for virtually all compatible backhoe loaders,
excavators and skid steers from the manufacturer.
Complete parts and instructions for NPK designed hydraulic installation including valves
and/or controls, hoses and fittings, boom and stick tubing, and clamps can be provided.
BACKHOE/EXCAVATOR HAMMER LINES
Typically, the pressure line should be arranged on the left side of the boom and routed
to the hammer “IN” port (6) and the return line is routed from the hammer “OUT” port
(5) on the right side. Flow to the hammer is controlled from the carrier’s auxiliary valve
or from an NPK supplied flow valve. Hydraulic oil is generally routed back to the tank
thru the carrier’s oil cooler and filter.
SKID STEER HAMMER LINES
Flow to the hammer (m3) is directed from an
auxiliary valve on the skid steer. NPK hammer
ports are marked “IN” and “OUT”.Return oil
(m4) is routed back to tank through the skid
steer return hydraulic circuit.
HAMMER CONTROL VALVE
There are two general types of control systems
depending on the carrier model:
1. CONTROL SYSTEM USING THE CARRIER AUXILIARY OR SPARE VALVE
SECTION.
This type of installation utilizes an existing carrier valve. Any additional parts, such
as a mechanical linkage, hydraulic pilot actuators, flow control valves, etc., are
supplied by the hydraulic kit supplier. NOTE: Special pressure control valves are not
required. The NPK hammer operating pressure is self-regulating.
2. CONTROL SYSTEM USING THE NPK FLOW VALVE (MULTIVALVE).
For carriers not equipped with a suitable auxiliary or spare valve section, NPK can
provide a solenoid operated, priority flow control valve to operate the NPK hammer.
The NPK multivalve is specifically designed for the operation of boom mounted
attachments.

- 13 -
HYDRAULIC INSTALLATION
SKID STEER HAMMER FLOW CONTROL VALVE (OPTIONAL)
On skid steers where auxiliary flow is excessive for the NPK hammer model, an NPK
flow control valve (ma3) is recommended.
NOTE: Be sure that the pressure (m3) and return (m4) lines are properly routed.
Inlet pressure connects to port “P” on the NPK flow control valve. Regulated flow from
valve port “H” (m5) connects to the “IN” port on the NPK hammer. The “OUT” port on
the hammer connects to port “T2” (m6) on the flow control valve. Port “T1” connects
to the return line (m4) on the skid steer.

- 14 -
HYDRAULIC INSTALLATION
PREVENTION OF CONTAMINATION
1. A hydraulic hammer is harder on oil than using a bucket, so the oil is apt to
deteriorate and breakdown sooner. Neglect of the oil system can not only damage
the hydraulic hammer but also cause problems in the carrier which could result in
damaged components. Care should be taken to check for contamination of the oil
and to change it if it is found contaminated. Oil sampling at regular intervals is
highly recommended.
❖When the hydraulic oil shows low viscosity and bubbles, this indicates that the oil
is deteriorated. If the oil is dark brown and gives off an offensive odor, it is
severely deteriorated. Change the oil immediately!
❖When the oil is clouded, or the oil filter has become clogged, it indicates that the
oil is contaminated. Change the oil immediately!
❖To change the contaminated hydraulic oil, drain the hydraulic system completely
and clean components. Do not mix new oil with the old.
2. Do not allow any contamination to mix with the oil. Take special care in preventing
contamination from entering the hydraulic system through the hose or tube
connection when changing the hydraulic hammer with the bucket.
3. Low oil level will cause heat build-up, resulting in deterioration of the oil. Also, it may
cause cavitation due to air mixing with the oil, leading to a damaged hydraulic
hammer and carrier components. Keep the oil at the proper level at all times.
4. Do not use the hydraulic hammer at an operating temperature higher than 180°F
(80°C). The proper operating oil temperature range is between 120°F (50°C) and
180°F (80°C). Since contaminated cooler fins causes reduced efficiency of the
cooler, keep the cooler fins clean at all times. Check the hydraulic oil cooling system
to be sure it is working effectively. The use of a heat gun is the best way to evaluate
if the cooler is working properly.
5. Water in the hydraulic oil will lead to damage of the hydraulic hammer and carrier.
Drain off water and foreign matter from the hydraulic tank at specified intervals.
When out of service, the hydraulic hammer should be stored indoors.
CHANGING THE FILTER ELEMENT AND HYDRAULIC OIL
Change the filter element and hydraulic oil at the intervals described in the operation
manual of the skid steer or excavator, when using a hydraulic implement. Another
method is to set up an oil sampling schedule and change accordingly.

- 15 -
HYDRAULIC INSTALLATION
HYDRAULIC QUICK DISCONNECTS
NPK recommends against the use of non-NPK quick
disconnects on hydraulic circuits operating NPK Products.
1. The hydraulic pulsations caused by hydraulic hammer operating can cause internal
pieces of non-NPK quick disconnects (32) to disintegrate. These pieces would
migrate into the hammer, causing damage.
2. If hydraulic quick disconnects are used, they should be capped when the hammer is
removed from the carrier to keep them clean. Contamination can get into the
hydraulic quick disconnect and can be flushed into the hammer and/or the hydraulic
system when re-connected. This, again, can cause damage.
3. Most quick disconnects create a restriction in the circuit. NPK Hammers are not
backpressure sensitive, but restrictions cause unnecessary heating of the oil. Also,
the pressure required to operate the hammer, plus the restriction in the disconnects
may push an older, low pressure, carrier machine to the limit of its hydraulic system.
This would interfere with proper hammer operation. However, the NPK approved
quick disconnects are properly sized so that the hammer operation is not
affected.
APPROVED CONNECTION (39)
NOT RECOMMENDED CONNECTION
Non-NPK Quick Disconnects (32)
NPK APPROVED CONNECTION QUICK DISCONNECTS
CONTACT YOUR NPK DEALER FOR ADDITIONAL INFORMATION ABOUT
NPK QUICK DISCONNECTS
ROFLEX COUPLING
STUCCHI COUPLING

- 16 -
HYDRAULIC INSTALLATION
HYDRAULIC QUICK DISCONNECTS
If hydraulic quick disconnects are used with the NPK Hammer, it is recommended that
the following precautions be followed:
1. Periodic inspection of both male
(DXm) and female (DXf) ends is
recommended to ensure the
couplers are in good working
condition. Failure to inspect
couplers may result in pieces from
a damaged or failed coupler to
migrate into the hammer or parts of
the coupler returned to the
machine.
2. Check for dirt, dust, and debris on
both couplers before coupling.
3. Be sure that the couplers are
completely seated together (38).
4. When replacing couplers, be sure
that couplers are replaced as a set,
male and female. Do not use one
new end and one used end.

- 17 -
MOUNTING INSTALLATION
NPK Mounting Installation Kits include the parts required to adapt the NPK HYDRAULIC
HAMMER to the carrier. NPK mounting kits include the hammer mounting bracket,
mounting pins (optional), flow control valve (optional), and hoses to connect to the
carrier hydraulic system (optional).
BACKHOES and EXCAVATORS
AF
HEX HEAD CAP SCREW (if required)
DXf
FEMALE QUICK DISCONNECT (if required)
DXm
MALE QUICK DISCONNECT (if required)
g20
MALE ADAPTER (if required)
m1
STICK PIN (if required)
m2
LINK PIN (if required)
m3
WHIP HOSE (pressure)
m4
WHIP HOSE (return)
m7
TOP BRACKET
m8
HAMMER BOLT PACKAGE
m9
KLIK PIN (if required)
m12
HEX NUT (if required)
SKID STEERS
NPK Mounting Installation Kits for skid
steers include parts required to adapt
the NPK HYDRAULIC HAMMER to the
carrier. NPK mounting kits include the
hammer mounting bracket (m7), and
hoses (m3 and m4) to connect to the
carrier hydraulic system. The flow
control valve (ma3) is optional.
REMOVAL FROM THE CARRIER
BACKHOES and EXCAVATORS
1. Close pressure and return line shut-
off valves (k4) if available.
2. Disconnect hydraulic hoses (m3 and
m4) before laying the hammer down.
3. Cap the pressure and return lines on
the carrier and connect the hammer
whip hoses to the hammer bracket.
4. Position the hammer (DR) horizontal
on wood blocks (t20) and remove
stick (m1) and link (m2) pins.

- 18 -
MOUNTING INSTALLATION
REMOVAL FROM THE SKID STEER
1. Position the hammer (DR)
horizontally onto the ground or
wood blocks (t20) as shown.
2. Disconnect both inlet and outlet
hoses.
3. Unlatch the mechanism holding the
hammer bracket to the carrier’s
coupler plate. (Consult the
machine manufacturer’s operator /
instruction manual for this
procedure.)
The tool end of the hammer should be set lower than the head end to prevent
moisture from entering the hammer through the tool area.
MOUNTING TO THE CARRIER
BACKHOES and EXCAVATORS
1. Place the hammer assembly (DR)
horizontally on wood blocks (t20) as
shown.
2. Align the stick pin bore (m26). Install
the stick pin. Then align the link pin
bore (m25).
3. Connect the pressure side hose (m3)
and the return side hose (m4).
4. Open the shut-off valves (k4) if
available.
MOUNTING TO THE SKID STEER
1. Place the hammer (DR) horizontally
onto wood blocks (t20) as shown.
2. Align the carrier’s coupler plate with
the hammer bracket. Couple the two
per the machine manufacturer
recommendations.
3. Connect the hoses.
Consult the skid steer manufacturer’s operator’s manual to
review the mounting and removal process!
The hydraulic lines must be handled carefully and sealed to
prevent contamination from entering the hammer or the
carrier’s hydraulic system.

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LUBRICATION
GREASING PROCEDURE
Manual greasing for hammers without an Auto Lube System.
1. Place the hammer in a vertical position, applying enough downforce to push the tool
up into the hammer.
2. Turn the machine off.
3. Grease the hammer until grease begins to come out around the tool (HH) and lower
bushing (see arrow).
4. Grease hammer at least once an hour. See “CORRECT FUNCTION OF
GREASING AND GREASE INTERVALS”for a more exact greasing procedure.
NOTE: USE A GOOD QUALITY EP #2 LITHIUM BASED GREASE WITH WEAR
INHIBITING ADDITIVES, SEE PAGES 20 through 21.