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NPK C2D Operator's Manual

Hydraulic compactor/driver
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NPK ATTACHMENTS...designed, built and backed by NPK.
NPK ATTACHMENTS...designed, built and backed by NPK.
Compactors
Compactors
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Oil Splash Lubrication
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Integrated Flow Control and
Pressure Relieving Valves
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Optional Backfill Blades
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Industry's Most Comprehensive
Field Service Corps
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Extensive Parts Distribution
System
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Distributor Outlets

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Summary of Contents for NPK C2D

  • Page 1 Integrated Flow Control and Pressure Relieving Valves Optional Backfill Blades Industry’s Most Comprehensive Field Service Corps Extensive Parts Distribution System Network of Over 350 Distributor Outlets NPK ATTACHMENTS...designed, built and backed by NPK. NPK ATTACHMENTS...designed, built and backed by NPK.
  • Page 2 Even on steep slopes or rough terrain where conventional rollers and other machines either can’t work or would be hazardous to try. In fact, NPK’s Compactor/Drivers can keep workers a full boom’s length from the compaction or driving action, away from the danger of cave-ins or equipment contact.
  • Page 3 Swivel feature to avoid machine repositioning NPK’s optional self-aligning swivel can align your Compactor/Driver to nearly any job from nearly any carrier position. With an excavator positioned over, parallel or perpendicular to the job, you can work productively in tight quarters, narrow trenches next to foundation walls and around manholes or other obstacles.
  • Page 4 Internet: www.npkce.com Each product sold by NPK is subject to an express written warranty. NPK makes no other warranty, express or implied, including any warranty of merchantability or fitness for any particular purpose. NPK is not liable for any incidental or consequential damages.
  • Page 5 C6C, C6B, C6 C8C, C8B, C8 C10C, C10 C12C, C12 “Use Genuine NPK Parts” 7550 Independence Drive Walton Hills, OH 44146-5541 Phone (440) 232-7900 Fax (440) 232-6294 © Copyright 2020 NPK Construction Equipment, Inc. www.npkce.com C000-9610C Compactor Operators Manual 9-20...

  • Page 6: Table Of Contents

    MAINTENANCE ..........................5 STANDARD PRACTICES ....................5 CARRIER COMPATIBILITY ......................6 SPECIFICATIONS ........................7 COMPACTOR/DRIVER STRUCTURE ..................10 C2D THROUGH C12C COMPACTOR/DRIVERS ............10 COMPACTOR/DRIVER SERIAL NUMBER LOCATION ............14 UNDERSTANDING COMPACTION ................... 15 COMPACTION FORCES ......................16 SOIL MATERIAL ......................... 17 SOIL DENSITY TESTING ......................

  • Page 7: Safety

    1. Operators and service personnel must read, understand and comply with the NPK INSTRUCTION MANUAL. 2. Keep personnel and bystanders clear of the COMPACTOR/DRIVER while in operation.
  • Page 8 15. Use the proper lifting equipment and tools when handling or servicing the COMPACTOR/DRIVER or components. 16. Important safety operating decals included with each COMPACTOR/DRIVER and HYDRAULIC INSTALLATION KIT. Keep them clean and visible. NPK will replace decals free of charge as needed. - 3 -...

  • Page 9: Forward

    Distributor. Use replacement parts sold by NPK only. NPK is not responsible for failures resulting from alterations not approved by NPK or substitution of parts not sold by NPK. Do not operate the Compactor/Driver underwater without instructions from NPK Engineering.

  • Page 10: Maintenance

    MAINTENANCE STANDARD PRACTICES Maintenance of and repairs to the COMPACTOR/DRIVER should be performed by an experienced service technician, thoroughly familiar with all standard practices and procedures, and most importantly, all safety precautions. The following is a review of common standard practices to be followed when working with hydraulic equipment, and is not meant to be all-inclusive.

  • Page 11: Carrier Compatibility

    Verify the carrier stability with the Compactor before transport or operation. Mounting a Compactor that is too small for the carrier machine can damage the unit and void the Warranty. Consult NPK, if there is uncertainty whether the compactor model is compatible. COMPACTOR/DRIVER RECOMMENDED CARRIER WEIGHT...

  • Page 12: Specifications

    (165-195) 3000 (207) *Denotes NPK "C" and "D" model compactor/drivers that have built in relief valves. The carrier circuit relief valve settings should be a minimum of 200 psi (14 bar) above the compactor/driver relief settings. "A" and "B" model NPK compactor/drivers rely on the carrier's circuit relief valve.
  • Page 13 (910) C10C 3400 (1542) 3515 (1640) C10** C12C 4000 (1814) 4475 (2030) 4040 (1835) 4120 (1870) **Contact NPK for assistance at (440) 232-7900. MODEL HEIGHTH WIDTH INSIDE BRACKET WIDTH₃ (mm) (mm) (mm) (711) (305) (178) (711) (356) (178) (635) (356)
  • Page 14 SPECIFICATIONS MODEL SWIVEL STANDARD BASEPLATE NARROW BASEPLATE FEATURE Dimensions Compaction Dimensions Compaction Area Area (cm) (sq m) (cm) (sq m) 12 x 25 (32 x 63.5) (0.2) 14 x 22 (36 x 56) (0.2) 14 x 22 (36 x 56) (0.2) OPTIONAL 17 x 28...

  • Page 15: Compactor/Driver Structure

    The C2D through C12C Compactor/Drivers consist of a top bracket, an upper frame and a lower frame. The C2D Compactor has a fixed top bracket only. The C3D, C4C, C6C, C8C, C10C, and C12C Compactor/Drivers are available with fixed or swivel top brackets.
  • Page 16 COMPACTOR/DRIVER STRUCTURE C2D THROUGH C12C COMPACTOR/DRIVERS MODEL C3D ITEM DESCRIPTION BOTTOM PLATE HYDRAULIC MOTOR HYDRAULIC MOTOR RUBBER MOUNT MODEL C4C UPPER FRAME LOWER FRAME THRUST COVER UPPER THRUST PLATE LOWER THRUST PLATE THRUST BEARING SWIVEL HUB (bolt-on) TOP BRACKET FIXED...
  • Page 17 COMPACTOR/DRIVER STRUCTURE C2D THROUGH C12C COMPACTOR/DRIVERS MODEL C6C ITEM DESCRIPTION BOTTOM PLATE HYDRAULIC MOTOR (C6) HYDRAULIC MOTOR (C8) MODEL C8C RUBBER MOUNT UPPER FRAME LOWER FRAME THRUST COVER UPPER THRUST PLATE LOWER THRUST PLATE THRUST BEARING SWIVEL HUB (weld-on) FIXED...
  • Page 18 COMPACTOR/DRIVER STRUCTURE C2D THROUGH C12C COMPACTOR/DRIVERS MODEL C10C ITEM DESCRIPTION BOTTOM PLATE HYDRAULIC MOTOR RUBBER MOUNT UPPER FRAME LOWER FRAME MODEL C12C THRUST COVER UPPER THRUST PLATE LOWER THRUST PLATE THRUST BEARING SWIVEL HUB (weld-on) TOP BRACKET FIXED SWIVEL - 13 -...

  • Page 19: Compactor/Driver Serial Number Location

    COMPACTOR/DRIVER SERIAL NUMBER LOCATION The serial number of your unit is required any time that you are placing a parts order or requiring technical assistance. Failure to use the serial number when ordering parts, may result in receiving the incorrect parts, resulting in additional cost and down time. The serial number will be comprised of the following sequence of numbers and letters: 0N-0000.

  • Page 20: Understanding Compaction

    UNDERSTANDING COMPACTION Whenever the earth is disturbed, it loses its original density. In order to regain that density, it must be manipulated by some mechanical means. Compaction is the reduction in soil volume that occurs when force is applied to it. application of external compressive forces increases the soil density or unit weight by mechanically rearranging and moving soil...

  • Page 21: Compaction Forces

    The amplitude will gradually increase as the soil becomes denser and more compacted. The amplitudes of a mounted compactor are substantially greater than other machine types. The high amplitudes of NPK Compactors are especially effective on materials which require a high compactive effort, such as coarse rock fill and dry clay soils.
  • Page 22 SOIL MATERIAL SOIL TYPES The unconsolidated material that is lying above the bedrock is soil. Specifically, soil is made up of disintegrated rocks and other material that have been broken down into smaller pieces by nature’s mechanical and chemical processes. This material is available to the contractor as building material.

  • Page 23: Soil Material

    SOIL MATERIAL SOIL PROPERTIES The following terms refer to properties and characteristics of soil materials. Knowledge of these industry terms will provide a better understanding of compaction. Compressibility. Compressibility is the reduction in soil volume that occurs when force is applied to it. Compressibility is achieved as air and water are expelled from the voids between the soil particles forcing the particles closer together, thus occupying less volume.

  • Page 24: Soil Density Testing

    SOIL DENSITY TESTING LABORATORY TESTS A lab procedure called the Proctor Test measures a soil sample to determine the moisture content and whether or not compaction is being achieved. There are several ways of testing for soil density, which were originally developed by R. R. Proctor in 1933.
  • Page 25 SOIL DENSITY TESTING Standard Proctor Test. A Standard Proctor soil test is conducted as follows: A soil sample is taken from the job location and placed in a container equal to 1/30 cubic foot. A 5-1/2 pound weight with a striking face of 3.1 square inches is dropped 12 inches for 25 blows on each of the three equal layers.

  • Page 26: Field Tests

    SOIL DENSITY TESTING FIELD TESTS Sand Cone Test. 1. A hole is dug using a density plate as a guide. 2. The soil sample is removed from the shallow density hole and preserved in a closed container to prevent loss of moisture from the sample. 3.
  • Page 27 SOIL DENSITY TESTING Nuclear Testing for Soil Density. This test method is the most accurate and easiest to perform. It is conducted with an instrument designed to measure density and moisture of soil. The measuring probe uses a radioactive source in combination with Geiger tubes to measure either density or moisture.

  • Page 28: Field Test Report

    24” - 30” wide PADOT No. 2 RC Model No. Test Lift Depth Test Moisture Percent of Elevation Content Maximum Density NPK C4C Surface NPK C4C -12” NPK C4C Surface NPK C4C -12” NPK C4C Surface NPK C4C -20” NPK C4C...

  • Page 29: Classification Of Compaction Equipment

    CLASSIFICATION OF COMPACTION EQUIPMENT Compaction equipment can be classified into four machine types, each producing a different type of compactive force: 1. Static 2. Ramming 3. Vibration 4. Combination Static, Ramming and Vibration The differences between ramming and vibratory action are basically the height the machine will jump (amplitude) and the number of blows in a given time period (frequency).

  • Page 30: Compaction Methods And Equipment Selection

    COMPACTION METHODS AND EQUIPMENT SELECTION In order to achieve the desired level of effective compaction in the selected material, the contractor must select the machine that produces the proper compactive effort. GRANULAR SOILS Granular material is not cohesive and the particles require a shaking or vibratory action to move them.

  • Page 31: Productivity

    1.0 for single pass, shallow trench 1.0 for single pass, shallow trench calculation calculation) Example: Example: NPK C6C Compactor, using two passes NPK C6C Compactor, using two passes for trench backfill compaction. for trench backfill compaction. A = 0.75 sq. meter T = 30 sec A = 8.1 sq.

  • Page 32: Hydraulic Installation

    (5) on the right side. Flow to the compactor is controlled from the carrier’s auxiliary valve or from an NPK supplied flow valve. Hydraulic oil is generally routed back to the tank through the carrier’s oil cooler and filter. NOTE: Do not route return oil through the carrier’s auxiliary valve.

  • Page 33: Compactor Control Valve

    COMPACTOR CONTROL VALVE 1. CONTROL SYSTEM USING THE CARRIER AUXILIARY OR SPARE VALVE SECTION. This type of installation uses an existing carrier auxiliary valve to operate the NPK Compactor/Driver. Additional parts, such as mechanical linkage, hydraulic pilot control valves, etc. can be furnished in an NPK HYDRAULIC INSTALLATION KIT.

  • Page 34: Prevention Of Contamination

    HYDRAULIC INSTALLATION PREVENTION OF CONTAMINATION A compactor/driver 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 compactor/driver, but also cause problems in the carrier which could result in damaged components.

  • Page 35: Hydraulic Quick Disconnects

    Compactor/Driver when re-connected. This, again, can cause damage. 3. Most quick disconnects create a restriction in the circuit. NPK Compactor/Drivers are back pressure sensitive. Restrictions can cause damage to the hydraulic motor.
  • Page 36 HYDRAULIC INSTALLATION HYDRAULIC QUICK DISCONNECTS If hydraulic quick disconnects are used with the NPK Compactor/Driver, it is recommended that the following precautions be followed: 1. Periodic inspection of both male and female ends is recommended to ensure the couplers are in good working condition.
  • Page 37 Compactor/Driver to the stick or arm of the carrier. Custom adapter brackets and quick attach brackets are available. Shown below is a typical NPK mounting kit. Mounting kits are machine specific. NOTE: NPK mounting kits may not be compatible with other attachments mounted to the carrier. Contact the NPK Sales Department for additional information.

  • Page 38: Backfill Attachment

    BACKFILL ATTACHMENT NOTE: THE BACKFILL ATTACHMENT CAN BE MOUNTED ON EITHER OR BOTH SIDES. NOTE: BACKFILL BLADE IS ONLY INTENDED TO BE USED FOR MOVING AND THE GRADING OF LOOSE MATERIAL! When using a backfill attachment on a swivel style compactor, you MUST install the two stop bolts (AF) to ensure the compactor will not swivel during use.

  • Page 39: Before Operation

    If using the swivel lock feature, these bolts must be loosened then tightened to the specified torque below (also see the “FASTENER TORQUE” section of the NPK Instruction Manual) before operating the Compactor/Driver in the “fixed mode”.

  • Page 40: Before Operation

    BEFORE OPERATION LUBRICATION Lubricate Bearings NPK C2D/C2C, C3D, C4C, C6C, C8C, C10C/C10 AND C12C/C12 Compactor/Drivers use oil bath bearings. Check the oil level in the lower frame before start-up, see the “MAINTENANCE AND INSPECTION” section of this manual. NPK C2, C4B/C4A/C4, C6B/C6 AND C8B/C8 Compactor/Driver bearings must be manually greased.

  • Page 41: Maintenance And Inspection

    MAINTENANCE AND INSPECTION DAILY MAINTENANCE • C2C/C2D, C3D, C4C, C6C, C8C, C10C, and C12C Compactor/Drivers use oil lubrication for the bearings, which may require semi-annual maintenance. • C2, C4/C4A/C4B, C6/C6B, and C8/C8B Compactor/Drivers must be manually greased. Using a grease gun (t37), lubricate each roller bearing (hm31) with the required quantity of grease, per the chart below.

  • Page 42: Lubricant Terms And Definitions

    LUBRICANT TERMS AND DEFINITIONS TERM DEFINITION ADHESIVE The ability of grease, gear lubricant or oil to cling to metal. ANTI WEAR AGENTS Used to help combat metal-to-metal contact, thus reducing wear. CAVITATION Air pockets in the oil circuit (as at the pump inlet). COHESIVE The ability of grease, gear lube or oil to cling to itself, thus resisting tearing apart.
  • Page 43 LUBRICANT TERMS AND DEFINITIONS TERM DEFINITION OILINESS Oiliness is measured of the coefficient of friction of a lubricant. Oiliness or lubricity depends on the adhering characteristics of an oil. It is determined by the attraction between the molecules of the oil and the molecules of another material.

  • Page 44: Operation

    OPERATION The NPK Vibratory Soil Compactor/Driver derives its power source from the backhoe or excavator on which it is mounted. High efficiency is achieved through a combination of forces developed by the compactor and carrier machine: impulse force, vibration, and downforce.

  • Page 45: Soil Compaction

    The type and consistency of soil being compacted determines the lift. The more cohesive the soil, the shallower the lift and/or more powerful the compactor must be. Depending on soil conditions, NPK Compactors are capable of compacting soil to densities in excess of 95% proctor in lifts as shown. MODEL LIFT HEIGHT Up to 2 ft.

  • Page 46: Leave It Running

    OPERATION SOIL COMPACTION Ironing vs. “Up” and “Down” The use of ironing or boom up and down depends upon the job. For compaction of horizontal surfaces, it is usually more effective to reposition the compactor with the boom up and down control. For shallow or slope compaction, ironing may be best. It is also very effective for the final surface pass to obtain a smooth finish.

  • Page 47: Narrow Trench Compaction

    OPERATION NARROW TRENCH COMPACTION For operation in narrow trenches, NPK baseplates can be permanently modified to the minimum widths shown. STANDARD MINIMUM MODEL WIDTH WIDTH (mm) (mm) 12.0 (305) 12.0 (305) 17.0 (432) 17.0 (432) 23.0 (610) 18.0 (457) 29.0 (737) 24.5...

  • Page 48: Sheet/Pile Driving And Extracting

    “slapping” motion increasing the driving force. SHEET/PILE AND POST/PIPE ADAPTERS The NPK Compactor/Driver can be easily modified for use as a sheet/pile driver and extractor, or pipe/post driver. A simple guide or extracting clevis (EA) can be welded to the baseplate (DZ).

  • Page 49: Swivel Feature

    SWIVEL FEATURE A free-turning swivel top (m7) is available as an option on models C4C, C6C, C8C, C10C and C12C NPK Compactor/Drivers. The self-aligning swivel feature minimizes carrier repositioning. The baseplate (DZ) can align to the job from any carrier position, over a wide range of boom positions.

  • Page 50: Storage Of The Compactor/Driver

    STORAGE OF THE COMPACTOR/DRIVER 1. Make sure all whip hoses that connect the Compactor/Driver to the carrier are plugged (AS) and all hose (AO) connections are capped (AR). Turn the shut-off valves (k4) to the “OFF” position. 2. If the unit is stored outdoors, cover with a waterproof tarp. - 45 -...

  • Page 51: Warranty Registration For New Units

    • You do NOT need to fill in username and password. • Select the “Warranty Registration” Link. • Enter your information in each field and continue to register your NPK unit(s). • At any time, you may select the “Help” tab for step by step tutorial.

  • Page 52: Warranty Statements

    WARRANTY STATEMENTS - 47 -...
  • Page 53 WARRANTY STATEMENTS - 48 -...

  • Page 54: Notes And Records

    NOTES AND RECORDS NPK COMPACTOR/DRIVER MODEL NUMBER _________________ SERIAL NUMBER _________________ NPK INSTALLATION KIT NUMBER ___________________________ CARRIER MANUFACTURER MODEL NUMBER SERIES SERIAL NUMBER DATE OF INSTALLATION _________________ DATE OF 20 HOUR INSPECTION ___________ WARRANTY REGISTRATION SENT ❑ - 49 -...
  • Page 55 © Copyright 2020 NPK Construction Equipment, Inc. www.npkce.com C000-9610C Compactor Operators Manual 9-20...
  • Page 56 SUBJECT: CHECK / SET COMPACTOR MANIFOLD RELIEF MODELS: ALL NPK COMPACTOR MODELS If the compactor relief cartridge has been replaced, disturbed, or is suspected to be out of adjustment, the following procedure can be used to check and set the relief.
  • Page 57 SB05-4A 3. Refer to the chart below for the correct relief pressure setting of the compactor model tested. To adjust the relief, use an 11/16” combination wrench to loosen the jam nut and a 5/32” Allen wrench to adjust the relief screw. C2C, D 2500 2500...
  • Page 58 Service Bulletin SB16-2 SUBJECT: COMPACTOR PRE-DELIVERY INSPECTION MODEL(S): ALL MODELS Model __________ Serial Number _________ Date __________ Verify Items Noted Below Prior To Delivery Verify hydraulic hoses between the motor and manifold are tight. Verify manifold fittings are tight. Place compactor on level flat surface. Remove drain plug, oil should be touching the bottom of drain port.

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