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INSTRUCTION MANUAL
FOR UNDERWATER OPERATION
FOR HYDRAULIC HAMMER
MODELS: GH7, GH9, GH10, GH12,
GH15, GH18, GH23, GH30,
GH40, GH50, E208, E210A,
E213, E216, E220, E225,
E240A, E260A
"Use Genuine NPK Parts"
7550 Independence Drive
Walton Hills, OH 44146-5541
Phone (440) 232-7900
Toll-free (800) 225-4379
Fax (440) 232-6294
Copyright 2018 NPK Construction Equipment, Inc.
www.npkce.com
H035-9600O GH7-
GH50,E208-E260A UWTR Instruction Manual 8-18
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Summary of Contents for NPK GH7
- Page 1 INSTRUCTION MANUAL FOR UNDERWATER OPERATION FOR HYDRAULIC HAMMER MODELS: GH7, GH9, GH10, GH12, GH15, GH18, GH23, GH30, GH40, GH50, E208, E210A, E213, E216, E220, E225, E240A, E260A “Use Genuine NPK Parts” 7550 Independence Drive Walton Hills, OH 44146-5541 Phone (440) 232-7900...
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Page 2: Safety
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... - Page 3 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.
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Page 4: Table Of Contents
Air Pressure....................... 5 NPK UNDERWATER KIT LISTING ..............6 HAMMER CONNECTION PORT ................7 RETAINING PIN KEEPER ..................9 GH7 – GH18, E216 – E225 ................9 MAIN VALVE SPOOL MODIFICATION .............. 10 HAMMER OPERATION ..................13 Before Start-Up ....................13 Setting the Air Pressure .................. -
Page 5: Operating Principle
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. -
Page 6: Air Supply
AIR SUPPLY Air Compressor The air compressor capacity varies with the hammer size. The base underwater kit is designed so that compressed air is supplied to the striking chamber area during operation. The addition of a portable air compressor capable of 100 cfm constant and a air flow regulator are required. -
Page 7: Npk Underwater Kit Listing
PART NUMBER E208 E2080-8050 E210A H211-8050 E225 E2250-8050 GH7-8050 GH9-8050 GH10 GH10-8050 E213 GH12 GH12-8050 E216 GH15-8050 GH15 E220 GH18 GH18-8050 GH23 GH23-8050 GH30 GH30-8050 GH40 GH40-8050 E240A H100-8001 E260A If kit is not listed above, please contact NPK at 1-800-225-4379. -
Page 8: Hammer Connection Port
(AS2), (exhaust valve housing) part number 11056728 (E208 through E225) (GH7 through GH23) or 3/4” hex head pipe plug, (AS3), (exhaust valve housing) part number 11057403 (E240A, E260A, GH30, GH40, GH50). B. Install the adapter elbow, (CF), (supplied by the dealer). - Page 9 NOTE: Extra procedures may be required to remove the drain plug (B). 2a. For the E210A, E213, E216, E220, E225, GH7, GH9 and GH15 hammers, all that is needed is to remove the drain plug (B) and replace it with the solid plug.
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Page 10: Retaining Pin Keeper
H226-2030 H226-5240 H227-2000 *Consult the NPK Sales Department for part information. **Support block not required for field modification. Note: You must provide the hammer bracket part number. That part number is stamped on the aluminum tag that is affixed to the hammer bracket or it is... -
Page 11: Main Valve Spool Modification
MAIN VALVE SPOOL MODIFICATION If the hammer is to be submersed deeper than the main valve case, the valve spool will need to be modified so that the cold water will not affect the hammer’s operation. Submerging the entire hammer in cold water sometimes causes the valve spool (Z) to stick. - Page 12 The chart below gives the standard spool part number and the modified spool part number. If you have any questions, call the NPK Service Department at 800-225-4379. NPK Underwater Application Valve Spool Modification (All dimensions are metric – mm)
- Page 13 11. Install the four socket head cap screws (OO) and torque to the value found in the NPK hammer service manual. 12. Re-install the upper support block and turn the shut-off valves to the “ON” position. The hammer is now ready to be put back into service.
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Page 14: Hammer Operation
If the unit is equipped with a Autolube, it is still recommended that the hammer is greased manually every hour. Before Start-Up Grease the hammer per the instructions in the NPK HYDRAULIC HAMMER SERVICE MANUAL. Setting the Air Pressure 1. -
Page 15: Care After Use
After completing the procedures described above, position the hammer as illustrated below 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. -
Page 16: Warranty Statements
WARRANTY STATEMENTS... - Page 17 WARRANTY STATEMENTS...
- Page 18 WARRANTY STATEMENTS...
- Page 19 WARRANTY STATEMENTS...
- Page 20 WARRANTY STATEMENTS...
- Page 21 © Copyright 2018 NPK Construction Equipment, Inc. www.npkce.com H035-9600O GH7-GH50,E208- E260A UWTR Instruction Manual 8-18...
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