NPK PH06 User manual

INSTRUCTION MANUAL
FOR UNDERWATER OPERATION
FOR HYDRAULIC HAMMER
MODELS:
“Use Genuine NPK Parts”
© Copyright 2017 NPK Construction Equipment, Inc. www.npkce.com
H035-9601G PH06-PH4,GH06-GH6,E202-E207 UWTR Instruction Manual 8-17
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 [phone]
Toll-free [phone]
Fax [phone]

1
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.

2
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.
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 800-
225-4379 or Internet at www.npkce.com.

CONTENTS
3
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

4
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.

5
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).

6
AIR SUPPLY
Air compressor
The air compressor capacity varies with the hammer size:
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 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.

7
NPK UNDERWATER KIT LISTING
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
If kit is not listed above, please contact NPK at 1-800-225-4379.

8
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.

9
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.
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.
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, K023-
6660 (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.
1= TOOL END OF HAMMER
2= GAS END OF HAMMER