Demco Gravity Flow 450 Wagon User manual

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01-17
AG20023, Rev. 9

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WARNING: TO AVOID PERSONAL INJURY OR DEATH, OBSERVE THE FOLLOWING
INSTRUCTIONS:
Never overload the wagon. The rating of the GF450 gear is 30,000 lbs. or the rating of
the tires, whichever is less.
Ensure that anybody present is clear before applying power to any machinery used in
conjunction with the wagon box or when moving the box.
Never allow anyone in, near, or on the gravity box during the transporting, loading, or
unloading of grain. Moving grain is dangerous and can cause entrapment, resulting in
severe injury or death by suffocation.
Do not exceed 20 miles per hour when towing the wagon.
TABLE OF CONTENTS
General information, Warranty Policy & Registration & Table of Contents...........................2
For your safety................................................................................................................... 3-9
Safety Sign Locations.........................................................................................................10
Bolt Torque & Wheel Bearing Adjustment...........................................................................11
Running Gear Parts Breakdown.........................................................................................12
Running Gear Parts List and Assembly Instructions ..........................................................13
Brake Tongue Maintenance and Adjustment ......................................................................14
Brake Tongue Parts Breakdown and Parts List ..................................................................15
13” Brake Cluster Parts Breakdown and Parts List ............................................................16
Running Gear Brake Line Parts Breakdown, Parts List, and Assembly Instructions..........17
Brake System Maintenance and Repair .......................................................................... 18-19
Gravity Flow Box Parts Breakdown ....................................................................................20
Gravity Flow Box Assembly Instructions and Parts List......................................................21
Maintenance and General Operation .................................................................................22
Gravity Box to Running Gear Assembly Instructions and Parts List...................................22
Gravity Flow Light Kit Parts Breakdown, Parts List, and Wiring Schematic .......................23
Thank you for purchasing a Demco Gravity Flow Wagon. We feel you have made a wise choice and hope you are completely
satisfied with your new piece of equipment. Proper care and use will result in many years of service.
INTRODUCTION
GENERAL INFORMATION
1. Unless otherwise specified, high-strength (grade5)
(3 radial-line head markings) hex head bolts are used
throughout assembly of this piece of equipment.
2. Whenever the terms “LEFT” and “RIGHT” are used in
this manual it means from a position behind the wagon
box and facing forward.
3. When placing a parts order, refer to this manual for proper
part numbers and place order by PART NUMBER,
DESCRIPTION and COLOR.
4. Read the assembly instructionscarefully. Study the assembly
procedures and all illustrations before you begin assembly.
Note which parts are used in each step. This unit must
be assembled in the proper sequence or complications
will result.
WARRANTY POLICY, OPERATOR MANUALS & REGISTRATION
Go online to www.demco-products.com to review Demco warranty policies, operator manuals and register your Demco product.

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SAFETY
TAKE NOTE! THIS SAFETY ALERT SYMBOL FOUND THROUGHOUT THIS
MANUAL IS USED TO CALL YOUR ATTENTION TO INSTRUCTIONS INVOLVING
YOUR PERSONAL SAFETY AND SAFETY OF OTHERS. FAILURE TO FOLLOW
THESE INSTRUCTIONS CAN RESULT IN INJURY OR DEATH!
THIS SYMBOL MEANS
ATTENTION
BECOME ALERT
YOUR SAFETY IS INVOLVED!
DANGER:
Indicates an imminently hazardous situation that,
if not avoided, will result in death or serious injury.
This signal word is to be limited to most extreme
situations typically for machine components which,
for functional purposes, cannot be guarded.
WARNING:
Indicates a potentially hazardous situation that, if
not avoided, could result in death or serious injury,
and includes hazards that are exposed when
guards are removed. It may also be used to alert
against unsafe practices.
CAUTION:
Indicates a potentially hazardous situation that,
if not avoided, may result in minor or moderate
injury. It may also be used to alert against unsafe
practices.
If you have questions not answered in this manual, require additional copies, or if your manual is
damaged, please contact your dealer or DEMCO, 4010 320th St., Boyden, IA 51234
ph: [phone] or Toll Free: 1-800-543-3626 Fax: [phone] or 1-800-845-6420
http://www.demco-products.com
SIGNAL WORDS:
This manual uses of the following signal words--
DANGER, WARNING, and CAUTION-- with safety
messages. The appropriate signal word has been
selected using the following guidelines.

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SAFETY...YOU CAN LIVE WITH IT
EQUIPMENT SAFETY GUIDELINES
Every year many accidents occur which could have been avoided by a few seconds of
thought and a more careful approach to handling equipment. You, the operator, can avoid
many accidents by observing the following precautions in this section. To avoid personal
injury, study the following precautions and insist those working with you, or you yourself,
follow them.
In order to provide a better view, certain illustrations in your owners manual may show an
assembly with a safety shield removed. However, equipment should never be operated in
this condition. Keep all shields in place. If shield removal becomes necessary for repairs,
replace shield prior to use.
Replace any caution, warning, danger or instruction safety decal that is not readable or is
missing.
Do not attempt to operate this equipment under the influence of alcohol or drugs.
Review safety instructions with all users annually.
Operator should be a responsible adult. DO NOT ALLOW PERSONS TO OPERATE OR
ASSEMBLETHIS UNIT UNTILTHEY HAVE DEVELOPED ATHOROUGH UNDERSTANDING
OF SAFETY PRECAUTIONS AND HOW IT WORKS.
To prevent injury or death, use a tractor equipped with a roll over protective system (ROPS).
Do not paint over, remove, or deface any safety signs or warning decals on your equipment.
Observe all safety signs and practice instructions on them.
Never exceed limits of a piece of machinery. If its ability to do a job, or to do so safely is in
question DON’T TRY IT.
LIGHTING AND MARKING
It is the responsibility of customer to know lighting and marking requirements of local highway
authorities and to install and maintain equipment to provide compliance with regulations.
Add extra lights when transporting at night or during periods of limited visibility.
Lighting kits are available from your dealer or from manufacturer.

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SAFETY SIGN CARE
• Keepsafetysignscleanandlegibleatalltimes.
• Replacesafetysignsthataremissingorhavebecomeillegible.
• Replacementpartsthatdisplayedasafetysignshouldalsodisplaycurrentsign.
• Safetysignsareavailablefromyourdistributor,dealerpartsdepartment,orfactory.
How to install safety signs:
• Besurethatinstallationareaiscleananddry.
• Decideonexactpositionbeforeyouremovebackingpaper.
• Removesmallestportionofsplitbackingpaper.
• Aligndecaloverspeciedareaandcarefullypresssmallportionwithexposedsticky 
backing in place.
• Slowly peel back remaining paper and carefully smooth remaining portion of decal into
place.
• Smallairpocketscanbepiercedwithapinandsmoothedoutusingpieceofdecal 
backing paper.
TIRE SAFETY
• Failuretofollowproperprocedureswhenmountingatireonarimcanproducean 
explosion which may result in a serious injury or death.
• Donotattempttomountatireunlessyouhaveproperequipmentandexperienceto 
do job.
• Inatingorservicingtirescanbedangerous.Wheneverpossible,trainedpersonnel 
should be called to service and/or mount tires.
• Alwaysorderandinstalltiresandwheelswithappropriatetypeandloadcapacitytomeet
or exceed anticipated weight to be placed on the equipment.
• NEVERexceed40psitireinationwhenusingtrucktiresongravityowwagons.
• Referto“TIREINFLATIONCHART”inyourownersmanualformaximumtirepressurefor
a Demco Grain Wagon.
REMEMBER
Your best assurance against accidents is a careful and responsible operator. If there is any
portion of this manual or function you do not understand, contact your local authorized dealer
or manufacturer.

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BEFORE OPERATION:
• CarefullystudyandunderstandthismanualandtheOwner’sManual.
• Donotwearloose-ttingclothingwhichmaycatchinmovingparts.
• Alwayswearprotectiveclothingandsubstantialshoes.
• Itisrecommendedthatsuitableprotectivehearingandeyeprotectionbeworn.
• Operatormaycomeincontactwithcertainmaterialswhichmayrequirespecicsafety
equipment relative to handling of such materials. (Examples: extremely dusty, molds,
fungus, bulk fertilizers, etc.)
• Keepwheelandlugnutstightenedtospeciedtorque.
• Assurethatagriculturalimplementtiresareinatedevenly.
• Giveunitavisualinspectionforanyloosebolts,wornparts,orcrackedwelds,andmake
necessary repairs. Follow maintenance safety instructions included in this manual.
• Besuretherearenotoolslyingonorinequipment
• Donotuseunituntilyouaresurethatareaisclear,especiallyaroundchildrenandanimals.
• Don’thurrylearningprocessortakeunitforgranted.Easeintoitandbecomefamiliar
with your new equipment.
• Practiceoperationofyourequipmentanditsattachments.Completelyfamiliarizeyourself
and other operators with its operation before using.
• Makesurethatbrakesareevenlyadjusted(ifequippedwithbrakes)
• UseatractorequippedwithRollOverProtectionSystem(ROPS)andfastenyourseatbelt
prior to starting the engine.
• ManufacturerdoesnotrecommendusageofatractorwiththeROPSremoved.
• Movetractorwheelstowidestrecommendedsettingstoincreasestability.
• Donotallowanyonetostandbetweentongueorhitchandtowingvehiclewhenbackingup
to equipment.
DURING OPERATION
• Bewareofbystanders,PARTICULARLYCHILDREN!Alwayslookaroundtomakesurethatit
is safe to start engine of towing vehicle or move unit.This is particularly important with higher
noise levels and quiet cabs, as you may not hear people shouting.
• NOPASSENGERSALLOWED-Donotcarrypassengersanywhereonorintractoror
equipment.
• Keephandsandclothingclearofmovingparts.
• Donotclean,lubricate,oradjustyourequipmentwhileitismoving.

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• Whenhaltingoperation,evenperiodically,settractorortowingvehiclesbrakes,disengage
PTO, shut off engine, and remove ignition key.
• Beespeciallyobservantofoperatingareaandterrain.Watchforholes,rocks,orother 
hidden hazards. Always inspect area prior to operation.
- DO NOT operate near edge of drop-off or banks.
- DO NOT operate on steep slopes as overturn may result.
- Operate up and down (not across) intermediate slopes. Avoid sudden starts and stops.
• Pickthemostlevelpossibleroutewhentransportingacrosselds.Avoidedgesofditches, 
gullies, and steep hillsides.
• Beextracarefulwhenworkingoninclines.
• Maneuvertractorortowingvehicleatsafespeeds.
• Avoidoverheadwiresorotherobstacles.Contactwithoverheadlinescouldcauseserious
injury or death.
• Avoidloosegravel,rocks,andholes;theycanbedangerousforequipmentoperationor
movement.
• Allowforunitlengthwhenmakingturns.
• Donotwalkorworkunderraisedcomponentsorattachmentsunlesssecurelypositionedand
blocked.
• Keepallbystanders,pets,andlivestockclearofworkarea.
• Operatetowingvehiclefromoperatorsseatonly.
• Neverstandalongsideofunitwithenginerunningorattempttostartengineand/oroperate 
machine while standing alongside of unit.
• Neverleaverunningequipmentunattended.
• Asaprecaution,alwaysrecheckhardwareonequipmentfollowingevery100hoursof 
operation. Correct all problems. Follow maintenance safety procedures.
FOLLOWING OPERATION
• Followingoperation,orwhenunhitching,stoptractorortowingvehicle,setbrakes,shutoff
engine and remove ignition key.
• Storeunitinanareaawayfromhumanactivity.
• Donotparkequipmentwhereitwillbeexposedtolivestockforlongperiodsoftime.Damage
and livestock injury could result.
• Donotpermitchildrentoplayonoraroundstoredunit.
• Makesureallparkedmachinesareonahard,levelsurfaceandengageallsafetydevices.
• Wheelchocksmaybeneededtopreventunitfromrolling.

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HIGHWAY AND TRANSPORT OPERATIONS
• Adoptsafedrivingpractices:
- Keep brake pedals latched together at all times. NEVER USE INDEPENDENT
BRAKINGWITH MACHINE INTOW, LOSS OF CONTROL AND/OR UPSET OF UNIT
CAN RESULT.
- Always drive at a safe speed relative to local conditions, ensure that your speed is low
enough for an emergency stop. Keep speed to a minimum.
- Reduce speed prior to turns to avoid risk of overturning.
- Always keep tractor or towing vehicle in gear to provide engine braking when going
downhill. Do not coast.
- Do not drink and drive!
• Complywithstateandlocallawsgoverninghighwaysafetyandmovementoffarm
machinery on public roads.
• Useapprovedaccessorylighting,agsandnecessarywarningdevicestoprotectoperators
of other vehicles on highway during transport.Various safety lights and devices are available
from your dealer.
• Useofashingamberlightsisacceptableinmostlocalities.However,somelocalitiesprohibit
their use. Local laws should be checked for all highway lighting and marking requirements.
• Whendrivingtractorandequipmentonroadunder20m.p.h.(40kph)atnightorduringday,
use flashing amber warning lights and a slow moving vehicle (SMV) identification emblem.
• Planyourroutetoavoidheavytrafc.
• Beasafeandcourteousdriver.Alwaysyieldtooncomingtrafcinallsituations,including
narrow bridges, intersections, etc.
• Beobservantofbridgeloadratings.Donotcrossbridgesratedlowerthangrossweight
at which you are operating.
• SAFETYCHAINS:Ifequipmentisgoingtobetransportedonapublichighway,always
follow state and local regulations regarding safety chains and auxiliary lighting. Be sure
to check with local law enforcement agencies for your own particular regulations.
Only safety chains (not elastic or nylon/plastic tow straps) should be used to retain
connection between towing and towed machines in event of separation of primary attaching
system. Use a high strength, appropriately sized hitch pin with a mechanical retainer and
attach safety chains. Criss cross chains under tongue and secure to draw bar cage,
mounting loops, or bumper frame.

Page 9
• Watchforobstructionsoverheadandsidetosidewhiletransporting.
• Always operate equipment in a position to provide maximum visibility. Make allowances
for increased length and weight of equipment when making turns, stopping unit, etc.
• Goodmaintenanceisyourresponsibility.Poormaintenanceisaninvitationtotrouble.
• Makesurethereisplentyofventilation.Neveroperateengineoftowingvehiclein 
a closed building. Exhaust fumes may cause asphyxiation.
• Beforeworkingonthismachine,stoptowingvehicle,setbrakes,shutoffengine 
and remove ignition key.
• Alwaysusesafetysupportandblockwheels.Neveruseajacktosupportmachine.
• Alwaysusepropertoolsorequipmentforjobathand.
• Useextremecautionwhenmakingadjustments.
• Followtorquechartinownersmanualwhentighteningboltsandnuts.
• Neveruseyourhandstolocateahydraulicleakonattachments.Useasmallpieceof
cardboard or wood. Hydraulic fluid escaping under pressure can penetrate skin.
• Openingsinskinandminorcutsaresusceptibletoinfectionfromhydraulicuid.
Without immediate medical treatment, serious infection and reactions can occur.
• Whendisconnectinghydrauliclines,shutoffhydraulicsupplyandrelieveallhydraulic
pressure.
• Replaceallshieldsandguardsafterservicingandbeforemoving.
• Afterservicing,besurealltools,partsandserviceequipmentareremoved.
• Donotallowgreaseoroiltobuilduponanystepsorplatform.
• Whenreplacingbolts,refertoownersmanual.
• Refertobolttorquechartinownersmanualforheadidenticationmarking.
• Wherereplacementpartsarenecessaryforperiodicmaintenanceandservicing,
genuine factory replacement parts must be used to restore your equipment to original
specifications. Manufacturer will not claim responsibility for use of unapproved parts
or accessories and other damages as a result of their use.
• Ifequipmenthasbeenalteredinanywayfromoriginaldesign,manufacturerdoes 
not accept any liability for injury or warranty.
• Areextinguisherandrstaidkitshouldbekeptreadilyaccessiblewhileperforming
maintenance on this equipment
PERFORMING MAINTENANCE

Page 10
SAFETY SIGN LOCATIONS
The types of safety sign and locations on the equipment are shown in the illustration
below. Good safety requires that you familiarize yourself with the various safety signs,
the type of warning, and the area or particular function related to that area, that requires
your SAFETY AWARENESS.
Please order replacement parts by PART NO., DESCRIPTION and COLOR.
REF. PART
NO. NO. QTY. DESCRIPTION
1. 04508 5 Amber Reflector (2.75” x 1.75”)
2. 04804 5 Red Reflector (2.75” x 1.75”)
3. 07278 2 Conspicuity Tape, Reflective (18”)
4. AG21006 1 Wagon Safety Decal (5” x 8”)
5. AG21067 1 “Keep off Ladder” (3 7/8” x 3 7/8”)
6. AG21163 2 Large “Demco”, Charcoal
7. AG21164 2 Medium “Demco”, Charcoal
8. AG21192 1 Med. Stripes, Charcoal (left)
- AG21193 1 Med. Stripes, Charcoal (right)
DECAL PARTS LIST
3
2
2
2
2
3
7
9
CAUTION!
Do not exceed 20 MPH
when loaded.
09/99 AG21002
13.
14.
4.
12.
5.
11.
Decals are not shown to scale
1
41
1
1
1
56
8
7
9
10
14 14
11
12
13
2
9. AG21172 2 “450”, Charcoal
10. BH21003 1 Brake Lever Indicator, Red/Green
11. AG21002 1 “Caution, 20 MPH” (2” x 3 7/8”)
12. AG21070 1 “Attention: Don’t Turn Sharp” (2” x 4”)
13. AG21001 1 “Tire Load Rating” (4 1/2” x 6”)
14. AG21127 2 “Caution Check All Wheel Nuts”
REF. PART
NO. NO. QTY. DESCRIPTION
NOTICE!
Keep wheel lug nuts or bolts tightened to specified torque
IMPORTANT :
Always retorque wheels after first trip!
CAUTION:
Over inflation may result in damage to
running gear and box integrity.
REV 5 AG21001
650/750bu.
3/4”-16UNF Grade 8
T o rque to 400 ft. lbs.
450/550bu.
5/8”-18UNF Grade 8
T o rque to 225 ft. lbs.
Check tire pressure regularly .
365bu.
5/8”-18UNF Grade 5
T o rque to 150 ft. lbs.
Nut or Bolt T o rques
Tire Pressure for all 365/450/550/650/750
Bushel Gravity Flow W a gons
60 psi.