PH06
PH07
PH1
PH2
PH3
PH4
GH06
GH07
GH1
GH2
GH3
GH4
GH6
E202
E203
E204
E205
E207
7550 Independence Drive
Walton Hills, OH 44146-5541
Phone (440) 232-7900
Toll-free (800) 225-4379
Fax (440) 232-6294
INSTRUCTION MANUAL
FOR UNDERWATER OPERATION
FOR HYDRAULIC HAMMER
MODELS:
© Copyright 2017 NPK Construction Equipment, Inc. www.npkce.com
H035-9601G PH06-PH4,GH06-GH6,E202-E207 UWTR Instruction Manual 8-17
“Use Genuine NPK Parts”
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 the
hammer while in operation.
Do not operate HAMMER without an impact-
resistant guard between the 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.
1
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 precharge.
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.
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 if conditions warrant. Consult OSHA regulations.
13. Wear safety glasses at all times. Beware of flying debris.
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 800225-4379 or Internet at www.npkce.com.
2
CONTENTS
SAFETY ................................................................................................................ 1
OPERATING PRINCIPLE ..................................................................................... 5
AIR SUPPLY ......................................................................................................... 6
NPK UNDERWATER KIT LISTING ...................................................................... 7
HAMMER CONNECTION PORT .......................................................................... 8
PH06, PH07, PH1, PH2, PH3, PH4 ................................................................... 8
GH06, GH07, GH1, GH2, GH3.......................................................................... 9
GH4 and GH6.................................................................................................. 10
E202 – E207.................................................................................................... 11
HAMMER OPERATION ...................................................................................... 12
CARE AFTER USE ............................................................................................. 13
WARRANTY STATEMENTS .............................................................................. 14
3
FORWARD
The NPK HYDRAULIC HAMMER is a rugged boom mounted demolition tool that
can be operated underwater by making certain modifications and following the
procedures in this manual.
Read and understand the SAFETY INFORMATION and operating instructions in
the NPK OPERATORS MANUAL before operating the hammer. If there are any
questions, call the NPK Service Department at 1-800-225-4379.
4
OPERATING PRINCIPLE
Although the hydraulic oil section of the hydraulic hammer is sealed completely,
water can enter into the area where the piston (N) impacts the tool (HH) when
the hammer is used underwater.
The hammer must be modified for underwater operation. If not, water (107)
trapped in the striking chamber (172) will be forced against the piston seals (PP)
as the piston strokes (106) down to impact the tool. The water pressure is
extremely high and greater than the seals can withstand. The seals are distorted
out of their grooves. This causes the piston to be forced against the sleeve (P).
This, in turn, can damage the piston and both sleeves. The water forced past the
seals enters the carrier hydraulic system (171) and can damage pumps and
other components.
To keep water from entering the striking chamber of the hammer when
submersed, the hammer must be supplied with compressed air, see the following
pages for air compressor size and connections required).
5
HAMMER
COMPRESSOR
MODEL
CAPACITY
PH06
5 CFM (minimum)
PH07
GH06
GH07
PH1
10 CFM (minimum)
GH1
E202
PH2
15 CFM (minimum)
GH2
E203
PH3
20 CFM (minimum)
GH3
E204
PH4
30 CFM (minimum)
GH4
GH6
E205
E207
AIR SUPPLY
Air compressor
The air compressor capacity varies with the hammer size:
Air pressure
The air pressure setting is dependent on the working depth of the hammer. The
air line will require a pressure regulator to reduce the pressure. See the
operating section of this manual for pressure setting procedure.
6
HAMMER
NPK KIT
MODEL
PART NUMBER
PH3
PH3-9500
PH4
PH4-9500
GH3
GH3-9500
GH4
GH4-8050
GH6
GH6-8050
E202
E2020-8050
E203
E2030-8050
E204
E2040-8050
E205
E2050-8050
E207
E2070-8055
NPK UNDERWATER KIT LISTING
If kit is not listed above, please contact NPK at 1-800-225-4379.
7
HAMMER CONNECTION PORT
PH06, PH07, PH1, PH2, PH3, PH4
The underwater connection port (17) is located on the top side of the main body
(A).
1. Remove the pipe plug (AS) from the underwater port and install a heavy duty
adapter elbow (CF) to connect to the air hose fitting.
PH SERIES
DO NOT install the air connection into the port (26) on the top side of the main
body. This port is used for autolube. Using the autolube port for underwater
operation can result in damage to the hammer.
2. Remove the drain plug (B) from the hammer body (located on the left side of
the hammer body (see above) and replace with solid 1/8” NPT plug,
22001010 (AS1).
3. Attach air line from air compressor to the adapter fitting on the hammer.
Hoses must be secured and protected from damage during operation.
8
HAMMER MODEL
d91
d92
d93
GH06
16.5 mm
15 mm
DRILL 15 mm dia. (19/32”) to center
TAP (3/8” – 19 NPT)
CHAMFER 1.5 mm x 45
GH07
16.5 mm
15 mm
GH1
25 mm
-
GH2
20 mm - GH3
16 mm
-
1. Install a heavy duty adapter elbow
(CF) into the previously machined
underwater connection port (17) to
connect to the air hose fitting.
1 = TOOL END OF HAMMER
2 = GAS END OF HAMMER
HAMMER CONNECTION PORT
GH06, GH07, GH1, GH2, GH3
For the GH06, GH07, GH1, GH2 and GH3 hammers, the underwater port (17)
must be machined into the impact ring (J). A 37/64 tap drill and a 3/8-19 npt tap
must be used at underwater connection port (17). See illustrations and chart
(below) for port locations and size.
2. Remove the drain plug (B) from the hammer body (A) (located on the left side
of the hammer body (see above) and replace with solid ¼” NPT plug, K0236660 (AS1).
3. Attach air line from air compressor to the adapter fitting on the hammer.
Hoses must be secured and protected from damage during operation.
9
HAMMER CONNECTION PORT
GH4 and GH6
The underwater connection port (17) is located on the left side of the impact
spacer.
1. Remove the pipe plug (AS) from the port and install a heavy duty adapter
elbow (CF) to connect to the air hose fitting.
DO NOT install the air connection into the port (26) on the right side of the impact
spacer. This port is a grease connection port used for autolube (26). Using the
autolube port for underwater operation can result in damage to the hammer.
2. Remove the drain plug (B) from the hammer body (A) (located on the left side
of the hammer body (see above) and replace with solid ¼” NPT plug, K0236660 (AS1).
3. Attach air line from air compressor to the adapter fitting on the hammer.
Hoses must be secured and protected from damage during operation.
10
HAMMER CONNECTION PORT
E202 – E207
The underwater connection port (17) is located on the left side of the impact
spacer.
1. Remove the pipe plug (AS) from the port and install a heavy duty adapter
elbow (CF) to connect to the air hose fitting.
DO NOT install the air connection into the port (26) on the right side of the impact
spacer. This port is a grease connection port used for autolube. Using the
autolube port for underwater operation can result in damage to the hammer.
2. Remove the drain plug (B) from the hammer body (A) (located on the left side
of the hammer body (see above) and replace with solid ¼” NPT plug, K0236660 (AS1).
3. Attach air line from air compressor to the adapter fitting on the hammer.
Hoses must be secured and protected from damage during operation.
11
HAMMER OPERATION
Precautions
When used in water, any hammer is subjected to much more severe conditions
than when used on land. Therefore, the hammer must be handled more
carefully.
1) Never operate the hammer without air supply.
2) Never start to operate the hammer before the compressor tank pressure
reaches 85 PSI.
3) If the air supply is stopped during operation, stop operation
immediately and determine the cause.
4) If the carrier is on board a barge, the tool is more liable to break because the
force of the carrier and the sway of the barge from wave action will act
together on the tool.
5) Grease is blown off by supplied air. Grease the hammer generously and
more often than when used on land. If the unit is equipped with an autolube,
it is still recommended that the hammer is greased manually every hour.
Before start up
Grease the hammer per the instructions in NPK Hydraulic Hammer SERVICE
MANUAL.
Setting the air pressure
1) Start the compressor to supply air to the hammer before it is submerged in
the water.
2) Extend the carrier boom down to the maximum working depth used on the
job site and keep the hammer submerged in the water. Bubbles will be
generated from the tool area due to air supply.
3) While maintaining the above condition, reduce the air pressure gradually with
the pressure regulator, and set the supplied air pressure at the minimum
level required to produce bubbles.
1) Reduce the pressure of the compressed air with the regulator as instructed
above.
Do not supply unregulated high pressure compressed air (85 PSI) from the
compressor directly to the hammer. Excessive air pressure may be forced
into the hammer through the sealed area.
2) A compressor with higher capacity than shown in the table can be used, but
be sure to control the pressure as described above because the volume of
compressed air supplied is greater.
12
CARE AFTER USE
Because the hammer is used in water, it is susceptible to rust and corrosion.
Use due care when draining water.
When the hammer is used every day:
a) Operate the hammer out of the water for several minutes, while
supplying air, to drain water completely.
b) If it is difficult to operate the hammer out of water, run the engine at low
RPM and idle the hammer 5 to 6 times while maintaining air supply.
When the hammer is not used for a long period of time (longer than 30
days):
a) After completing the procedures described above, position the hammer
as illustrated and discharge the nitrogen gas inside the head cap
completely, using the NPK Charge Adapter.
b) While keeping the charge valve in an OPEN state, run the engine at a
low speed and actuate the hammer foot switch for 2 to 3 seconds.
c) Remove the Charge Adapter.
d) Pour approximately one quart of oil (t52) into the lower end of the Tool
Holder.
e) Cover the tool end of the hammer to prevent water or moisture entering
the Tool Holder.
13
WARRANTY STATEMENTS
14
WARRANTY STATEMENTS
15
WARRANTY STATEMENTS
16
WARRANTY STATEMENTS
17
WARRANTY STATEMENTS
18
© Copyright 2017 NPK Construction Equipment, Inc. www.npkce.com
H035-9601G PH06-PH4,GH06-GH6,E202-E207 UWTR Instruction Manual 8-17
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