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TerraMarc Industries Lockwood 472H Owner's/Operator's Manual

Potato harvester
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OWNER /
OWNER /
OWNER /
OWNER /
OWNER /
OPERA
OPERA T T T T T OR'S
OPERA
OPERA
OPERA
MANU
MANU AL
MANU
MANU
MANU
Lockwood Mfg.
A Division of TerraMarc Industries
237 12th St. NW • P.O. Box 849
West Fargo, ND 58078-0849
(701)282-5520 • FAX: (701)282-9522
www.lockwoodmfg.com
OR'S
OR'S
OR'S
OR'S
AL
AL
AL
AL
472H PO T T T T T A A A A A T T T T T O O O O O
472H PO
472H PO
472H PO
472H PO
HARVESTER
HARVESTER
HARVESTER
HARVESTER
HARVESTER
Companion to 18055-00
Manual P/N 18054-00
9/10/04

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  • Page 1 MANU AL MANU MANU MANU HARVESTER HARVESTER HARVESTER HARVESTER HARVESTER Lockwood Mfg. A Division of TerraMarc Industries 237 12th St. NW • P.O. Box 849 West Fargo, ND 58078-0849 (701)282-5520 • FAX: (701)282-9522 www.lockwoodmfg.com Manual P/N 18054-00 9/10/04 Companion to 18055-00...
  • Page 2 Disclaimer This document is based on information available at the time of its publication. While efforts have been made to be accurate, the information contained herein does not purport to cover all details or variations, nor to provide for every possible contin- gency in connection with installation, operation, or maintenance.
  • Page 3 LOCKWOOD LIMITED WARRANTY Lockwood warrants for each original retail purchaser of new goods from Lockwood or a Lockwood Dealer, that such goods are at the time of delivery to such purchaser, free from defects in material and workmanship. Electrical components operated on direct current (D.C.) circuits must be operated with respect to proper polarity and not above or below the voltage specified by Lockwood.
  • Page 4 PRE - DELIVERY CHECKLIST This checklist is provided to identify items to be checked and adjusted if necessary by the dealer prior to delivery of a new machine. Check the following and adjust if necessary. Machine matches sales order (correct serial number The tire pressure is at the appropriate psi.
  • Page 5 HOW W W W W T T T T T O REA O REA O REA O REACH US O REA CH US CH US CH US CH US Telephone / Fax E-mail Address Hours Number Internet Lockwood Mon. - Fri. For Parts and Service: For Service: serv@crary.com 237 12th St.

  • Page 6: Table Of Contents

    Contents Section Description Page INTRODUCTION ........................2 SAFETY ............................ 3 GENERAL SAFETY ........................4 OPERATING SAFETY ........................ 5 MAINTENANCE SAFETY ......................5 2.4 HYDRAULIC SAFETY ........................ 6 PTO (POWER TAKEOFF) SAFETY ................... 6 TRANSPORT SAFETY ....................... 7 STORAGE SAFETY ........................7 TIRE SAFETY ..........................
  • Page 7 Contents Section Description Page 3.20 OPERATING HINTS ........................39 3.20.1 PREPARING SOIL AND CROP .................. 39 3.20.2 LOADING THE TRUCK ....................39 3.20.3 ADVERSE CONDITIONS ................... 39 3.20.4 HARVESTING EFFICIENCY ..................40 3.21 GENERAL LOW DAMAGE POTATO HARVESTING ..............40 3.21.1 DIGGER BLADES .....................
  • Page 9 SERIAL NUMBER LOCATION Always give your dealer the serial number of your Lockwood 472H Harvester when ordering parts, requesting service or other information. The serial number decal is located on the right side of the machine. Please mark the number in the space provided for easy reference.

  • Page 10: Introduction

    1.0 INTRODUCTION Congratulations on your purchase of a new Lockwood 472H Harvester to complement your farming operation. Lockwood has designed and manufactured this equipment to meet the needs of a discerning agricultural industry for the efficient harvesting of potatoes. Safe, efficient, and trouble free operation of your harvester requires that you and anyone else who will operate or maintain the machine, read and understand the safety, operation, maintenance, and trouble shooting information contained within the Operators Manual.

  • Page 11: Safety

    This Safety Alert Symbol means The Safety Alert symbol identifies important ATTENTION! BECOME ALERT! safety messages on the Lockwood 472H Har- YOUR SAFETY IS INVOLVED! vester and in the manual. When you see this symbol, be alert to the possibility of personal injury or death.

  • Page 12: General Safety

    Read and understand the The responsibility for SAFE operation and maintenance of Operator’s Manual and all your Lockwood 472H Potato Harvester rests on YOU. YOU safety signs before operat- must ensure that those who will operate, maintain or work ing, maintaining, adjusting...

  • Page 13: Operating Safety

    2.1 GENERAL SAFETY 11. When climbing 14. Shut the tractor off when connecting or disconnecting ladders, face the machine hydraulics. ladder when Always face ladder when climbing up or 2.3 MAINTENANCE SAFETY climbing up or down down. Keep body centered 1.

  • Page 14: Hydraulic Safety

    PTO (POWER TAKE-OFF) 2.4 HYDRAULIC SAFETY SAFETY Always place all tractor hydraulic controls in neutral Keep bystanders, especially children, away from drive before disconnecting from tractor or working on the shafts. hydraulic system. Be extremely careful when working around PTO Keep all components in the hydraulic system in good, shafts, drivelines, or other rotating shafts.

  • Page 15: Transport Safety

    2.6 TRANSPORT SAFETY 2.8 TIRE SAFETY Comply with all local regulations regarding transport- Failure to follow proper procedures when mounting a ing equipment on public roads and highways. tire on a wheel or rim can produce an explosion which may result in serious injury or death. Ensure the SMV (Slow Moving Vehicle) emblem and all the lights and reflectors required by the local Do not attempt to mount a tire unless you have the...
  • Page 16 2.9 SAFETY DECALS The types of safety decals and locations on the equipment are shown in the pictures below. Good safety requires that you familiarize yourself with the various safety decals, the type of warning and the area, or particular function related to the areas that require your SAFETY AWARENESS.
  • Page 17 2.9 SAFETY DECALS The types of safety decals and locations on the equipment are shown in the pictures below. Good safety requires that you familiarize yourself with the various safety decals, the type of warning and the area, or particular function related to the areas that require your SAFETY AWARENESS.

  • Page 18: Safety Decal Locations

    2.10 SAFETY DECAL LOCATIONS The types of safety decals and locations on the equipment are shown in the pictures below. Good safety requires that you familiarize yourself with the various safety decals, the type of warning and the area, or particular function related to the areas that require your SAFETY AWARENESS.
  • Page 19 2.10 SAFETY DECAL LOCATIONS The types of safety decals and locations on the equipment are shown in the pictures below. Good safety requires that you familiarize yourself with the various safety decals, the type of warning and the area, or particular function related to the areas that require your SAFETY AWARENESS.

  • Page 20: Sign-Off Form

    2.11 SIGN-OFF FORM Lockwood follows the general Safety Standards specified by the American Society of Agricultural Engineers (ASAE) and the Occupational Safety and Health Administration (OSHA). Anyone who will operate and/or maintain the equipment must read and clearly understand ALL Safety, Operating and Maintenance information presented in this manual. Do not operate or allow anyone else to operate this equipment until after reviewing the provided information.

  • Page 21: Operation

    PRE-OPERATION CHECKLIST OWNER The Lockwood 472H Potato Harvester efficiently and rapidly Efficient and safe operation of the Lockwood 472H Potato harvests potatoes. The tractor PTO and hydraulics provide Harvester requires that each operator reads and understands the power. Be familiar with the machine before starting.

  • Page 22: Machine Components

    3.3 MACHINE COMPONENTS The Lockwood 472H Potato Harvester uses the digger nose and blades to bring the potatoes up from the ground and deliver them onto the primary belted chain. The potatoes and vines are then transported to the secondary and override belted chains.

  • Page 23: Initial Operating Procedure

    3.4 INITIAL OPERATING PROCEDURE Although no operational restrictions exist when using the 3.4.3 AFTER OPERATING FOR 10 HOURS: Lockwood 472H Potato Harvester for the first time, Lockwood recommends that the following mechanical items be 1. Re-torque all wheel bolts, fasteners and hardware.

  • Page 24: Controls

    CONTROLS All operators should review this section of the manual to familiarize themselves with the location and function of all machine controls before starting. Some machines may vary slightly due to custom or optional features. Controls (See Figure #7) DOWN DOWN DOWN DOWN...

  • Page 25: Operating

    3.6 OPERATING 3.6.1 ATTACHING IMPLEMENT TO TRACTOR NOTE Always place the Lockwood 472H Harvester on a hard, dry surface that is free of obstacles and debris. When ATTACH- Check shaft articulation and clearance zone! Joint ING the machine to the tractor, follow this procedure.

  • Page 26: Unhooking Implement From Tractor

    3.6 OPERATING (CONT’D) 3.6.2 UNHOOKING IMPLEMENT FROM TRAC- WARNING When UNHOOKING the machine from the tractor, follow this procedure. Heavy tongue weight can cause severe injury or death. 1. Clear the area of bystanders, especially small children. Support the jack and tongue securely. Approximate tongue weight is 3500 lbs.

  • Page 27: Transporting

    3.7 TRANSPORTING 3.8 DIGGING The Lockwood 472H Harvester can easily and conveniently The nose and the belted chains have been designed to do be moved from location to location. When transporting the the most efficient lifting of any machine in the industry. If...

  • Page 28: Digger Blade

    3.8 DIGGING (CONT’D) C. Clod Blades: 3.8.2 Digger Blade This blade works best in heavier soil that may pro- duce clods on the harvester belted chains. Unlike The digger blade angle can be changed by loosening the the semi-point blades, the clod blade is not sharp at rear bolt of the blade mounting brackets and moving the the point but has a 1”...

  • Page 29: Nose Rollers

    3.8 DIGGING 3.8.3 Nose Rollers The nose rollers located at the forward end of the primary belted chain can be adjusted up or down and forward or back- ward by placing the nose roller bolt in the proper holes in the digger frame (see Figure # 18).

  • Page 30: Coulters

    3.9 COULTERS The coulters can be set on either side of the digger nose NOTE and nose wing. Three different types of blades are available. Larger diameter coulters help prevent boil out. Be sure the coulters are raised before turning. 3.9.1 COULTER ADJUSTMENT 1) 24”...

  • Page 31: Primary Belted Chains

    3.10 PRIMARY BELTED CHAINS 3.11 SECONDARY BELTED CHAINS The digger (primary) section of the harvester places the po- The primary belted chains (See Fig. # 26) are located in the tatoes on the override and secondary belted chains (See digger section of the harvester. The rods come in various Fig.

  • Page 32: Override Belted Chain

    3.12 OVERRIDE BELTED CHAIN The back of the rear cross is adjustable up and down to The override belted chain (See Fig. #28) carries the vines allow the potatoes to roll and avoid being caught by the sec- and trash through the harvester onto the ground at the rear ondary belted chain.

  • Page 33: Slip Clutches

    3.14 SLIP CLUTCHES A slip clutch protects the primary, secondary, and override conveyors on the harvester. The factory assembles these clutches and you MUST adjust them in the field to meet load conditions. WARNING Place all controls in neutral or off, stop tractor engine, set parking brake, remove ignition key, wait for all mov- ing parts to stop, then properly block machine before servicing, adjusting, unhooking, attaching, repairing, or...

  • Page 34: Side Elevator

    3.15 SIDE ELEVATOR Side Elevator: Side Elevator Inside Mount: The side elevator serves as a conveyor to move the pota- toes from the rear of the machine, up to the picking table. The inside adjustment of the side elevator allows adjust- The side elevator has a tilt adjustment to spread the pota- ment of the side elevator chain as close as possible to the toes apart.

  • Page 35: Picking Table

    3.16 PICKING TABLE The potatoes are delivered to the picking table from the clean- 3.17.1 TRANSPORTING POSITION ing table. The potatoes are spread evenly over this area for During harvester transporting, the outer section of the bulk final inspection before proceeding up the boom to the truck. boom must be tucked under the inner section.

  • Page 36: Wheels

    3.18 WHEELS The rear wheels on the 3 and 4 row options are adjustable to fit a variety of row spacings ranging from 32” - 40”. To adjust the rear wheels, follow these steps: 1. Jack the axle off the ground to remove weight from the tires.

  • Page 37: Options

    3.19 OPTIONS 3.19.1 CLEANING TABLES Star Table: The star table cleaning device (See Fig. #44) is installed at EZ Roll Table: the top of the side elevator and provides a series of soft rubber finger rollers for trash and clod removal. This table The EZ Roll Table is installed at the top of the side elevator works well when used in trashy, cloddy conditions where and provides a series of counter rotating rollers.
  • Page 38 3.19 OPTIONS (CONT’D) 3.19.1 CLEANING TABLES (CONT’D) Reverse Roll Table: Ellis Table: The reverse roll table mounted at the discharge end of the side elevator is a very effective option for removing dirt, clods, The Ellis Table (See Fig. # 45) is mounted at the discharge small stones and trash such as vines and grasses.

  • Page 39: Snapper Rollers

    3.19 OPTIONS Optional equipment is available for your Lockwood 472H The position of the upper snapper roller can be adjusted by Harvester, call your nearest dealer for availability informa- moving the take-up strap with the adjustment bolt (See Fig. tion.

  • Page 40: Shakers

    3.19 OPTIONS (CONT’D) Oscillating Shaker Adjustment: 3.19.3 SHAKERS The oscillating shaker is controlled by a wide variety of ad- justments. The main adjustment is the speed of the hydrau- The harvester can use shakers in the digger section. The lic motor. You can equip the harvester with an optional hy- crop should lose eighty percent of the dirt in the digger sec- draulic flow control to change the speed of the shakers with tion.
  • Page 41 3.19 OPTIONS (CONT’D) 3.19.3 SHAKERS (CONT’D) The harvester can use shakers in the digger section. The crop should lose eighty percent of the dirt in the digger sec- tion. The following types of shakers are available. Hydraulic adjustable manual shakers: Hydraulic adjustable manual shakers (See Fig.

  • Page 42: Shaft Monitor

    3.19 OPTIONS 3.19.4 SHAFT MONITOR Installing The Unit In The Tractor 1. Find a suitable location in the tractor cab for the moni- A rear cross shaft monitor is available to put on the rear tor head. It is recommended that the location allow easy cross conveyor drive.
  • Page 43 3.19 OPTIONS (CONT’D) 3.19.4 SHAFT MONITOR (CONT’D) 4. Connect the main sensor harness to the male end of the splitter box. Installing The Unit On The Implement 5. Remove plugs 1 and 2 from the bottom of the splitter 1. Route the main sensor harness to the location where box.
  • Page 44 3.19 OPTIONS Wiring Schematic For Shaft Monitor Fig #56 Shaft Sensor Examples TY-RAP SHAFT SHAFT SHAFT CLAMP MAGNET KEYWAY TARGET METAL METAL TARGET TARGET Shaft Sensor Shaft Sensor Shaft Sensor Wellensensor Wellensensor Wellensensor Fig. #2 0.125 0.750 0.125 HERE, A KEYWAY IS BEING USED AS A HERE, A MAGNET IS BEING USED AS A HERE, A KEY IS BEING USED AS A TARGET FOR THE SHAFT SENSOR.
  • Page 45 3.19 OPTIONS (CONT’D) 3.19.4 SHAFT MONITOR (CONT’D) Cal Button The CAL button is used to set the number of target passes in one revolution. MULTI FUNCTION DIGITAL To program the CAL value, press the CAL button and use TACHOMETER 0000 the Plus and Minus buttons to set the desired value.

  • Page 46: Roller Scrapers

    3.19 OPTIONS 3.19.5 ROLLER SCRAPERS: Roller scrapers (See Fig. #59) are offered to remove soil buildup on belted chain rollers. Clockwise or counterclock- wise scrapers are required, depending upon the rotation of the roller. Make sure the beveled edge of the scraper feeds into the rotation of the roller.

  • Page 47: Operating Hints

    3.20 OPERATING HINTS 3.20.3 ADVERSE CONDITIONS 3.20.1 PREPARING SOIL AND CROP Lockwood has special belted chains available designed for Many people plan their farming operations long before har- harvesting potatoes in varying and extreme conditions. In vest time. The long range planning can well include mea- many cases, changing to one of these special belted chains sures that will increase harvesting efficiency, as well as will enable the machine to keep harvesting when others have...

  • Page 48: Harvesting Efficiency

    3.21 GENERAL LOW DAMAGE PO- 3.20 OPERATING HINTS TATO HARVESTING Lockwood has always recognized that potato bruising con- 3.20.4 HARVESTING EFFICIENCY cerns the grower greatly and constantly searches for im- proved methods of bruise reduction. Proper operator train- Studying procedures and facts of mechanical harvesting can ing has the most effect on potato bruising and is the most help operate the harvester at maximum efficiency with mini- controllable.
  • Page 49 3.21 GENERAL LOW DAMAGE POTATO HARVESTING (CONT’D) 3.21.2 BELTED CHAINS (CONT’D) Primary Belted Chains: Rear Cross Belted Chains: The rear cross belted chains is the first change of direction The primary belted chain elevates the potatoes out of the for the potatoes in the harvester. The rear cross belted chain ground.

  • Page 50: Hex Bore Sprockets

    3.22 HEX BORE SPROCKETS The harvester comes with easy to change hex bore sprock- CHAIN ets. These hex bore sprockets drive the primary and sec- IDLER ondary chains (See Fig. #60). The speed of these sprock- DOUBLE DRIVE ets can affect potato bruising by changing how much dirt SPROCKET the primary and secondary belted chains carry.

  • Page 51: Equation

    3.23 EQUATION EQUATION: The following equation can be used to calculate the primary and secondary belted chain speed for the 472H. PRIMARY BELTED CHAIN SPEED (MPH) = ((PTO RPM)(# HEX SPROCKET TEETH)(# WEB SPROCKET TEETH)(WEB PITCH)) 2059960 SECONDARY BELTED CHAIN SPEED (MPH) = ((PTO RPM)(# HEX SPROCKET TEETH)(# WEB SPROCKET TEETH)(WEB PITCH)) 3531360 EXAMPLE: GIVEN: In this example we will use a tractor PTO rpm speed of 1000 rpm, a ground speed of 2.50 mph.

  • Page 52: Storage

    3.24 STORAGE After the season's use, inspect the machine thoroughly and Make a list of all parts needed for repairs and order prepare for storage. Repair or replace any worn or damaged them immediately. Perform repairs when time permits components to prevent any unnecessary down time at the and prevent unnecessary down time at the start of start of next season.

  • Page 53: Removing From Storage /Pre-Season Maintenance

    3.24 STORAGE (CONT’D) If the machine cannot be stored inside, cover with a Rotate all components and systems by hand to check for any seized parts. Loosen any seized components waterproof tarp and tie securely in place. with penetrating oil before starting. Store out of the way of human activity.

  • Page 54: Drive Chain Tension

    3.25 DRIVE CHAIN TENSION 3.27 BELTED CHAIN Adjust the drive chains for the appropriate amount of slack. To prevent major breakdowns or failures, periodical checks With the idler in place and tightened, measure the slack in should include inspection of worn clips, worn master links, the part of the chain that will run in tension.

  • Page 55: Service And Maintenance

    4.0 SERVICE AND MAINTENANCE 4.1 SERVICE 4.1.2 GREASING Use the Service Record Checklist provided to keep a record Along with a servicing interval, perform a visual inspection. of all scheduled maintenance. Maintenance personnel can often detect potential problems from any unusual sounds made by such components as 1.

  • Page 56: Service Record

    SERVICE RECORD See Lubrication and Maintenance sections for details of service. Copy this page to continue record. Note: This service record recommendations are based on normal operating conditions. Severe or unusual conditions may require more frequent attention. √ ACTION CODE: CHECK OR INSPECT CL CLEAN LUBRICATE...

  • Page 57: Pto Service

    4.3 PTO SERVICE 4.4 MAINTENANCE The machine requires frequent lubrication. Grease the driv- 4.4.1 PREVENTIVE MAINTENANCE eline parts after the number of hours as shown on the dia- gram below. Clean and grease the implement input driv- eline before each prolonged period of non-use. Telescoping WARNING members must have lubrication to operate successfully re- gardless of whether a grease fitting is provided for that pur-...

  • Page 58: Repair Of Belted Chain

    4.4 MAINTENANCE 4.4.1 PREVENTIVE MAINTENANCE (CONT’D) NOTE Reassemble rods and clip with bolts. See your autho- Tighten wheel lug nuts and inflate rear ground wheels rized dealer for replacement parts. correctly. Visually check hydraulic systems for fluid leaks. Tighten, if necessary, any hydraulic connections. In- spect hoses and tubing for any damage or wear.

  • Page 59: Changing Hydraulic Oil Filter

    4.4 MAINTENANCE (CONT’D) 4.4.3 CHANGING HYDRAULIC OIL FILTER USED IN THE ELECTRO-HYDRAULIC VALVES WARNING WARNING Injury or death may result if a cylinder loses pressure Hydraulic fluid under pressure can pierce the skin, caus- and suddenly retracts or extends. Block up or lower ing injury or death.

  • Page 60: Bleeding The System

    4.4 MAINTENANCE After the system is bled, adjust the flow control of the 4.4.4 BLEEDING THE SYSTEM tractor’s remote hydraulic outlet to the appropriate flow rate. The electro-hydraulic valve is supplied all by the remote trac- WARNING tor outlet. Excessive flow will potientially overload the trac- tor with heated hydraulic oil that could damage the tractor’s hydraulic system.

  • Page 61: Trouble Shooting

    5.0 TROUBLE SHOOTING In the following section, we have listed many of the problems, causes and solutions to the problems that you may encoun- ter. If you encounter a problem that is difficult to solve, even after having read through this trouble shooting section, please call your local Lockwood dealer or distributor.
  • Page 62 5.1 HARVESTER TROUBLE SHOOTING PROBLEM POSSIBLE CAUSE REMEDY Machine does not respond to Broken hydraulic hose. Replace or repair hose. operation of hydraulic control levers. Tractor Control Valve off Turn Valve on Hydraulic fittings leaking. Check fittings and tighten if loose. Check fittings and tighten if loose.

  • Page 63: Preventable Damage To Pto Shaft

    5.2 PREVENTABLE DAMAGE TO PTO SHAFT P RO BL EM PO S SIBLE CAUSE REM EDY Yo ke s w a rp e d u n d e r u p s e ttin g im p a cts . Exce s s ive s h a ft le n g th .

  • Page 64: Shaft Monitor Troubleshooting

    5.3 SHAFT MONITOR TROUBLESHOOTING Problem R emedy First, check the 3 ampere fuse. W hen power is supplied, the S econd, check for at least 10 Tachometer does not power-up. volts at the accessory plug. Third, replace the tachometer. First, check the power to the splitter box (power light).
  • Page 65 5.3 SHAFT MONITOR TROUBLESHOOTING (CONT’D) Problem Remedy Check that the Low Alarm value W hen a shaft stops turning, the has not been set to zero. If the tachom eter does not indicate an shaft Low value is zero, the alarm alarm, but an RP M is displayed.

  • Page 66: Specifications

    * When connecting auxiliary equipment to the tractor hydraulic system for power source, consult the tractor manufacturer’s specifications to be sure of the type of system and pump delivery capacity to prevent damage. The Lockwood 472H Harvester can be configured for closed center or open center hydraulics.

  • Page 67: Chain Pitch And Rod Configurations

    6.2 CHAIN PITCH AND ROD CONFIGURATIONS The belted chain comes in various pitches, configurations and patterns. These options will help to increase or decrease soil elimination, maximize conveying capacity, and protect potatoes from damage. In the figures below, the circles represent the rods in a belted chain. The center to center distance between the rods defines the chain pitch.
  • Page 68 6.2 CHAIN PITCH AND ROD CONFIGURATIONS (CONT’D) OFFSET ROD TO OFFSET ROD Pitch 7/16" 1/2" 5/8" 1.43 1.43 1.45 1.54 1.53 1.54 1.72 1.71 1.71 1.93 1.92 1.91 PITCH Fig. #69 Offset Rod STRAIGHT (ST) OFFSET UP (UP) ROD DIA. OFFSET DOWN (DN) ROD DIA.
  • Page 69 6.2 CHAIN PITCH AND ROD CONFIGURATIONS (CONT’D) A typical single belted chain assembly uses two webs with various rods (links) connected to the webs with rivets. The full width rods are also riveted to the middle web. (See Fig. #71) UNIT LENGTH OF BELT 304.8 (12.00)

  • Page 70: Chain Patterns

    6.3 CHAIN PATTERNS “Pattern” chain is a combination of straight and/or offset links arranged in various repetitive sequences. The purpose of a “pattern” is to meet various conveying, cleaning or damage prevention conditions. An all straight link pattern creates a flat surface for minimum separation. Use this pattern in loose soil conditions to carry soil as far as possible up, thereby minimizing potato bruising.
  • Page 71 6.3 CHAIN PATTERNS (CONT’D) Using a combination of up/down links will create deeper pockets. Notice in (Figure #73) the up/down pattern creates more of an opening between the rods than the straight/up link pattern does. On a 50mm (1.96”) pitch chain: a straight/up pattern the opening is 1.53”...
  • Page 72 6.3 CHAIN PATTERNS The straight/down/down pattern creates a shallow pocket. This pattern helps prevent rollback. Using of two down rods extends the length of the pocket. Using an up rod with the down rods create a maximum opening between the links. This up/down/down pattern breaks the surface and makes the belted chain more aggressive in soil removal.

  • Page 73: Chain Coverings

    6.4 CHAIN COVERINGS 6.4.1 PEGS Pegs are rubber fingers that stick up off the rod that prevent rollback of the potatoes. These pegs stick up 2.5 inches from the top of the rod and are spaced 3.38 inches apart. See figure below. Figure #75 Pegs 6.4.2 FLIGHTS Flights are rubber flaps that extend the length of the rod.

  • Page 74: Rubber Cover

    6.4 CHAIN COVERINGS Using chain patterns enhances the primary belted chain’s ability to separate soil from the potatoes. Once the potatoes reach the secondary belted chain much of the soil is eliminated. At this point various belted chain coverings in combination with chain patterns are used to help convey and reduce bruising of the potatoes.

  • Page 75: Pillow Cushions

    6.4 CHAIN COVERINGS (CONT’D) 6.4.4 PILLOW CUSHIONS Pillow cushions are extruded double wall rubber tubing with four continuing air shafts that run the entire length of the tubing. It was designed so that no matter how the potato hits the tubing, the tubing will flex. This flexibility also gives it self-cleaning ability.

  • Page 76: C-Flex

    6.4 CHAIN COVERINGS 6.4.5 C-FLEX This illustration below shows how the ‘C’ flex and pitch differences affect the rod opening. ‘C’ flex has desirable attributes when it comes to potato protection and self-cleaning characteristics. The ‘C’ flex profile protects the potatoes even under extreme cold conditions when the rubber becomes stiffer.

  • Page 77: Ears

    6.4 CHAIN COVERINGS (CONT’D) 6.4.6 EARS Ears are flaps that line the edge of the rod. These flaps prevent rollback of potatoes off the side belts. Ears are available on the following chain coverings; C-Flex, Pegs, and Flights. See figures below. Figure #80 Ears 472H Potato Harvester Owner Operator’s Manual Page 69...

  • Page 78: Bolt Torque

    6.5 BOLT TORQUE CHECKING BOLT TORQUE: The tables shown below give correct torque values for various bolts and capscrews. Tighten all bolts to the torques specified in chart unless otherwise noted. Check tightness of bolts periodically, using bolt torque chart as a guide. Replace hardware with the same strength bolt.

  • Page 79: Hydraulic Fitting Torque

    6.6 HYDRAULIC FITTING TORQUE TIGHTENING FLARE TYPE TUBE FITTINGS * 1. Check flare and flare seat for defects that might Tube Torque Value* Recommended cause leakage. Size Size Turns To Across Tighten 2. Align tube with fitting before tightening. Flats (After Finger Tightening) 3.

  • Page 80: Tire Inflation Pressures

    6.7 TIRE INFLATION PRESSURES Tire Inflation Pressures Tread inflation Application Tire Size type (psi) 11.25 x 24 50.0 472H Harvester 13 x 24 grader 33.0 472AH 14 x 24 grader 50.0 Harvester 4630 13 x 24 grader 33.0 Harvester 21.5L x 16.1 36.0 40 x 19-19.5 65.0...
  • Page 82 Lockwood Mfg. A Division of TerraMarc Industries 237 12th St. NW • P.O. Box 849 West Fargo, ND 58078-0849 (701)282-5520 • FAX: (701)282-9522 www.lockwoodmfg.com Manufactured in the United States of America by Lockwood Mfg.

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