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The policy of Kent Demolition Tools is one of continual improvement. We reserve the right to change
design, materials, or specifications at any time, without notice or creating any obligation to previous or
future customers.
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The information contained in this manual is provided at no charge to the customers of the Kent Demolition
Tool Company, a Division of Gougler Industries, inc., Kent, Ohio.
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We hereby grant to our customers the right to reproduce individual pages, electronically or by photocopy,
when used in support of the Kent product described herein, provided that no changes are made to the
material information, no reproductions are sold, and no part of this manual is incorporated in any
publication without the specific written permission from the Kent Demolition Tool Company.
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This manual applies to Kent Hammer S/N 5001 & Above
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Last Revision: November 2005
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Table of Contents
Related Manuals for KENT Nordco KF3BM
Summary of Contents for KENT Nordco KF3BM
- Page 1 • The information contained in this manual is provided at no charge to the customers of the Kent Demolition Tool Company, a Division of Gougler Industries, inc., Kent, Ohio. •...
- Page 3 Kent demolition tools have been designed from the inside out to deliver the rugged and dependable day-in and day-out performance you need to get the job done, to minimize downtime, and to keep the job moving on budget and on schedule.
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Page 4: Table Of Contents
TABLE OF CONTENTS SECTION A GENERAL INFORMATION HAMMER SPECIFICATIONS SAFETY PRECAUTIONS HAMMER CONSTRUCTION PRINCIPLE OF OPERATION SECTION B MAINTENANCE LUBRICATION ACCUMULATOR DISASSEMBLY PROCEDURE ACCUMULATOR RE-ASSEMBLY PROCEDURE ACCUMULATOR CHARGING PROCEDURE TORQUE REQUIREMENTS SECTION C TROUBLESHOOTING SECTION D PARTS LIST KF3BM HAMMER PARTS KITS: HAMMER LIFTING EYE KIT HAMMER CHARGE KIT... -
Page 5: Section A
SECTION A GENERAL INFORMATION NOV/2005 Section A – Page #1... - Page 6 KF3BM 350# Class Hammer SPECIFICATIONS: Mounting Style ....Bare Hammer Power Unit Weight ..... 162 lbs.
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Page 7: Safety Precautions
Make frequent inspections of the hammer and base machine as described in the "Daily Inspection" section of this manual. • Do not make any alterations to the hammer without the authorization of Kent's Product Support Department. • Anytime service is performed on the hammer, hydraulic pressure in the line must first be released. - Page 8 GENERAL CONSTRUCTION OF THE HAMMER 1. ACCUMULATOR The accumulator stores hydraulic fluid for use during the hammering cycle. It also absorbs any pulsations seen by the hydraulic circuit. 2. BACKHEAD The hydraulic ports (pressure and return) are built into the backhead. THROUGH BOLTS The three (3) major parts of the hammer, the front head, cylinder and the backhead, are secured by...
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Page 9: Principle Of Operation
PRINCIPLE OF OPERATION The impact energy is a product of the force acting on piston and the length of its stroke. The piston is powered by the direct action of the hydraulic oil pressure and flow to the hammer. The following illustration is a simplified sketch of the hydraulic oil porting of the hammer. Area (A1) of the piston is larger than area (A2) of the piston. - Page 10 This page intentionally blank Section A – Page #6 NOV/2005...
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Page 11: Section B
SECTION B MAINTENANCE NOV/2005 Section B – Page #1... -
Page 12: Lubrication
LUBRICATION Kent's KF3BM hydraulic hammer is equipped with one (1) grease fitting. This fitting is located on the front bushing, near the anvil (refer to the illustration below). Lack of lubrication can cause failure of the anvil, piston or shorten the life of the seals. An NLGI NO.2 grease is recommended. - Page 13 Accumulator Disassembly/Assembly: Before you attempt to disassemble the accumulator, you should become familiar with the components of the accumulator. They are as follows: General Note: When disassembling the accumulator, inspect all parts for wear and replace as necessary before reassembly. Tools required for this procedure: Adjustable or 22mm wrench 5mm Hex key (allen wrench)
- Page 14 Disassembly Procedures: Discharge the Nitrogen: ACCUMULATOR IS UNDER HIGH PRESSURE! DO NOT STAND OVER THE CHARGE PORT LOCATED ON TOP OF THE ACCUMULATOR. FAILURE TO DO SO MAY RESULT IN BODILY INJURY. Remove accumulator plug (on top of accumulator) and valve cap (on side of accumulator) using 22mm or adjustable wrench.
- Page 15 Disassembly Procedures (Continued): Using a 14mm allen wrench, remove the accumulator by removing the set screws holding the accumulator to the back head. (Note: If you have the optional lifting eye kit installed this must be removed as well.) Turn the accumulator upside down and insert it into a vise.
- Page 16 Disassembly Procedures (Continued): Using a spanner wrench (Nordco P/N 4011560), insert the 4 pins on the wrench into the matching holes at the bottom of the accumulator. This may require tapping the wrench pins – with the hammer butt - into their corresponding holes.
- Page 17 Disassembly Procedures (Continued): Wash the accumulator body and cover in solvent. Inspect the inside of the accumulator cover and body for burrs or nicks. If burrs are found, they can be removed by using 600 grit or finer paper. If nicks are found, replace the part.
- Page 18 Re-Assembly Procedures: Apply a coat of anti-seize agent to prevent scores to threaded pant of accumulator body. Place the new diaphragm carefully to seat in the outer circumferential groove. Lubricate the round notches of the outer circumferential face of the diaphragm with high-quality grease.
- Page 19 Re-Assembly Procedures: Charging of nitrogen gas After the accumulator has been reassembled, loosen the vise, and set it back again with the outside up. The accumulator can be charged with Nitrogen gas at this time (following the procedures on page 10) or can be mounted back on the hammer and charged later.
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Page 20: Accumulator Charging Procedure
ACCUMULATOR CHARGING PROCEDURE To receive the optimum performance from the hydraulic hammer, care must be taken to maintain the proper nitrogen charge in the accumulator of the hammer. To assist with this, a charge kit is available. Refer to Section D, Page 5. NOTE: The customer supplied nitrogen tank MUST be equipped with a regulator! The following is a step-by-step procedure that should be used to properly charge the accumulator. - Page 21 STEP ILLUSTRATION STEP 3 Remove the cap (#19) and O- Ring (#20) from the side of the accumulator cover using a 22mm or adjustable wrench. USE EXTREME CAUTION WHEN HANDLING PRESSURIZED VESSELS!! STEP 4 Attach the end of the regulator hose (#15) to the regulator on the nitrogen tank and then attach the elbow end (#18) of the charge kit...
- Page 22 STEP ILLUSTRATION STEP 6 Open the charge valve (21) on the accumulator about one full turn. STEP 7 Open the valve on the nitrogen tank. Open the shut-off valve (12) gradually, allowing nitrogen to flow into the accumulator until the charge kit pressure gauge (11) reads the pressure determined under Step 5, then close the shut-...
- Page 23 STEP ILLUSTRATION STEP 10 Remove the charge kit adapter (3) and o-ring (4). Reinstall the Accumulator Plug and O-ring. Step 11 Close the valve on the nitrogen tank bleed nitrogen pressure by slowly opening the shut-off valve (12). Once the pressure gauges on the tank read 0 psi, close shut-off valve.
- Page 24 Torque Specifications As a general rule, all bolts should be torqued in sets, so that the load is divided equally among any bolts that function as a group. All bolts in that group should first be loosened, and then re- tightened in stages, alternately bringing opposing...
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Page 25: Section C
SECTION C TROUBLESHOOTING NOV/2005 Section C – Page #1... - Page 26 TROUBLE SHOOTING GUIDE If a problem occurs with the hammer, it is important to first get a flow and pressure reading of the hammer circuit. To do this, plumb a flow meter and pressure gauge into the pressure line going to the hammer, locate them as close to the hammer as possible. Once the readings are taken, refer to the following list of problems and possible causes: Condition Problem...
- Page 27 Continued... Condition Problem Remedy Hammer is slow or Hydraulic oil temperature is Oil temperature should not erratic... too high. exceed 176°F. Low oil flow or pressure. Test and repair hydraulic system. Adjust hammer valve. Accumulator pressure too Adjust pressure to specification. high.
- Page 28 Continued... Condition Problem Remedy Hammering is weak... Insufficient oil flow. Adjust control valve to rated specifications. Operating pressure is low Check the pump and pressure relief valve. Oil is contaminated, Change hydraulic oil, and filters. discolored, or cloudy in appearance Oil level is low Refill to proper levels.
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Page 29: Section D
SECTION D PARTS LIST NOV/2005 Section D – Page #1... - Page 30 Section D – Page #2 NOV/2005...
- Page 31 PARTS LIST UMBER ESCRIPTION UMBER ESCRIPTION KF3-10201 Cylinder K154037-10025 Spring Pin KHB3R-10106 Dust Seal KF3-3021 Back Head KHB3R-10107 U-Packing K160011-00018 O-Ring KF3-10111 Seal Retainer K15287 Port Adapter KHB2R-10107 U-Packing 35700832 O-Ring KF3-10114 Seal Ring 1560039 GPF Plug K161021-00065 O-Ring K084891-01000 GPF Plug KHB2R-10120 Plug...
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Page 32: Hammer Lifting Eye Kit
Kits Available for Kent Hammers 98410212 Hammer Lift Eye Kit UMBER ESCRIPTION 98410212 Hammer Lift Eye Kit 3767080 Soc Head Capscrew, M16 x 80 –12.9 86038990 High Strength M16 Flat Washer 31920262 Hammer Lifting Eye 3069437 H-Collar Lockwasher Note: When replacing accumulators, keep all hardware For remounting the lifting eye. - Page 33 HOSE ASSEMBLY 15374 4 JIC SWIVEL ELBOW This charge kit works on all Nordco machines equipped with Kent Hammers. Items 1 & 2 are included in the kit, but work with the larger Kent Hammer, not the KF3BM. NOV/2005 Section D – Page #5...
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Page 34: Accumulator Kit
Accumulator Kit ACCUMULATOR KIT PART NO. : 79140945 ITEM PART NO. DESCRIPTION 79140943 Accumulator Cap 23164410 35700833 O-Ring 1612260 Valve 11762 O-Ring 7296022 Diaphragm 79140944 Accumulator Body 35700830 O-Ring Section D – Page #6 NOV/2005... -
Page 35: Seal Kit
68010009 SEAL KIT UMBER ESCRIPTION KHB3R-10106 Dust Seal KHB3R-10107 U-Packing KHB2R-10107 U-Packing KF3-10114 Seal Ring K161021-00065 O-Ring KHB2R-10120 Plug K160011-10010 O-Ring KF3-10121 Bushing 35700834 O-Ring 35700831 O-Ring KHB1G-10532 Seal Washer 54910560 Plug 1560036 Screw Plug K160011-00018 O-Ring 35700832 O-Ring K160011-00008 O-Ring 35700830 O-Ring... - Page 36 THIS PAGE INTENTIONALLY BLANK Section D – Page #8 NOV/2005...
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