Demco 9CCRTB14 User manual

8C010267, Rev AB
7/10/18
SIDE DUMP
11-14-2022
8C010271, Rev. C
TRUCK BOX KIT
9CCRTB14, Truck Box Kit, 14’
9CCRTB15, Truck Box Kit, 15’
9CCRTB16, Truck Box Kit, 16’
9CCRTB17, Truck Box Kit, 17’
9CCRTB20, Truck Box Kit, 20’
9CCRTB24, Truck Box Kit, 24’

2
Table of Contents
Product Disclaimer.............................................................................................................. 3
Introduction......................................................................................................................... 4
Dealer Checklist.................................................................................................................. 6
To The Owner...................................................................................................................... 7
Safety.................................................................................................................................. 8
Maintenance Safety............................................................................................................. 11
Safety Decals/Reectors..................................................................................................... 12
Operating Instructions......................................................................................................... 14
Maintenance........................................................................................................................ 16
Inspection and Maintenance Checklists.............................................................................. 17
Electrical System................................................................................................................. 18
Electrical Harness (All Models)............................................................................................19
Hydraulic System.................................................................................................................20
Hydraulic Cylinders and Bottom Cylinder Pins (All Models)................................................ 21
Pivot Latch Parts (All Models)............................................................................................. 22
Tub Parts (All Models)......................................................................................................... 24
Frame Parts (All Models)..................................................................................................... 26
Hydraulic Parts (All Models)................................................................................................ 28
Model Specic Parts............................................................................................................ 30
Remote Grease Zerk Parts..................................................................................................31
Roll-Rite Electric Tarp.......................................................................................................... 32
Aero Electric Tarp Mounts................................................................................................... 45
Tarp Tips.............................................................................................................................. 46
Trailer Pro, Electric Over Hydraulic Kit (4CFK2018)............................................................47
General Troubleshooting..................................................................................................... 52
Specications and Features................................................................................................ 53
Warranty.............................................................................................................................. 54
Warranty Registration.......................................................................................................... 57

3
In this document you will nd information based on available knowledge
at the time of its publication. To be accurate with the information, every
e󰀨ort was made but may not cover all details or variations of a truck box
or provide every possibility in connection with its production, operation and
maintenance. A Feature and Option may be presented in the manual that
is not relevant to this truck box. Demco assumes no obligation of notice, to
holders of this document, with changes made to a product.
SPECIFICATIONS AND DESIGN ARE SUBJECT TO CHANGE WITHOUT NOTICE.
Demco is often making improvements and developing new designs. In
doing so, we reserve the right to make changes and/or improvements
without obligation for equipment sold beforehand. Self-modication to
our truck boxs may a󰀨ect the operation, function, and safety, so this is
not advised. If a replacement part is necessary, Demco should supply it,
please contact your nearest dealer or Demco.
DEMCO STATEMENT OF PRODUCT SAFETY:
As a producer of agricultural and transportation equipment, Demco is fully
aware of its responsibility of providing its customers products that perform
their expected use, in a truly safe manner. Safety considerations shall be a
fundamental and high precedence part of all engineering/design analysis
and judgments involving Demco products. It is our stated policy that
our products will be manufactured to coincide with the safety standards
specied by the National Association of Trailer Manufacturers and/or any
other o󰀩cially recognized standards at the time manufactured. However,
this statement should not be translated to mean that our product will
uphold against a customer’s own carelessness or disregard for common
safety practices specied in each product’s manual, nor will we be
accountable for any such occurrence.
Product Disclaimer

4
Front
Rear
Driver
Passenger
PLEASE NOTE:
• All documents within the manual referring to products not manufactured by Demco
have been printed with the permission of the manufacturer specied.
• All references to driver, passenger, front and rear of the truck box are determined from a
position behind the truck and facing forward.
Introduction
GENERAL INFORMATION:
Demco requires that you and anyone else who will be operating and maintaining the truck
box read and understand the guidelines in the manual for safe, e󰀩cient, and trouble free
operations. Proper maintenance, adjustments and use will result in many years of service.
Keep this manual handy for frequent reference and to pass on to new operators or owners. If
assistance, information, or additional copies of the manual are needed, contact the nearest
dealer, a distributor, or Demco.
At Demco we strive to design, produce and deliver the highest quality product on the
market. Our employees have a strong background of knowledge and combined experience
in manufacturing to put quality workmanship into our products. In this manual you will nd
information covering all models of the Demco Side Dump Truck Box line. Use the table of
contents to locate specic areas of interest.

5
For your convenience we have four easy ways to register your warranty.
• Call our toll free number and ask for warranty
registration. 1-888-274-6010
• Fax completed warranty registration form.
Fax: [phone]
• Register on-line in warranty page at
www.demco-products.com
• Complete and return registration form.
Demco Warranty does not cover the following:
1) Cleaning, transporting, mailing and service call charges.
2) Depreciation or damage caused by normal wear, accidents,
improper protection or improper use.
See complete Warranty for details.
Record your truck box model and serial number in the space provided
below. Your dealer needs this information to give you prompt, e󰀩cient
service when you order parts.
MODEL NO.__________________________
SERIAL NO.__________________________
DATE PURCHASED___________________
In addition to the serial number, Demco has
placed a coded unit number on the chassis
and the tub. Call Demco for location.
Introduction
Serial Number

6
1. All hardware properly tightened
2. Lubrication of grease ttings
3. All decals properly located and readable
4. Lights function properly
5. Air lines tight and no pinched lines
6. Overall condition (touch up any scratches, clean and polish)
7. Operator’s manual
Date Delivered: _____________
Signature of Salesman or Technician:________________________________
PRE-DELIVERY CHECKLIST
Dealer Checklist
To The Dealer:
Inspect the truck box thoroughly after shipment to be certain it is functioning
properly before delivering it to the customer. The following checklist is a reminder
of points to cover. Check o󰀨 each item as it is found satisfactory or after proper
adjustment is made.
DELIVERY
Review the operator’s manual with the customer. Explain the following:
1. Safe operation and service
2. Correct trailer operation
3. Daily and periodic lubrication and maintenance
4 Daily and periodic inspections
5. Trouble shooting
6. Storing truck box
7. Demco parts and service policies
8. Have the customer write the truck box model and serial
number in space provided in manual introduction.
9. Give customer the operator’s manual and encourage
the customer to read the manual carefully.
10.Completion and mailing of warranty registration form.
Date Delivered:_________________________
Signature:_____________________________
Model No:_____________________________
Serial No:______________________________

7
To The Owner
Thank you for your recent purchase of a new Demco Side Dump
Truck Box. The primary objective of Demco is to build and provide
youwithaqualityproduct.However, in the event that a problem
does occur, it is imperative that your warranty registration
is on file in order to accurately respond to your specic service
circumstances. For your convenience we have four easy ways to
register your warranty:
• Call our toll free number and ask for
warranty registration.
1-888-274-6010
• Fax your completed warranty
registration form.
1-712-262-1022
• Register on-line at:
www.demco-products.com
• Complete and mail the warranty
registration form.
This manual has been prepared to assist you in the operation of
your new truck box and contains information pertaining to safety,
operations and all of its parts. Our personnel in sales and service
are always available to assist you when questions arise concerning
the maintenance or operations of your truck box.
When ordering parts, please refer to part numbers and
descriptions as listed throughout this book. All parts and whole
goods will be shipped FOB Spencer, IA. Or FOB your regional
distributor. Always check merchandise immediately upon receipt
for damage or shortage. Note any discrepancy on carrier’s bill of
lading and notify Sender within 10 days. Returned goods will be
subject to a 15% restocking charge. Demco reserves the right to
make improvements and modications on equipment without
obligation to change previously built equipment. All prices are
subject to change without notice.
Register
Warranty
One of
Four Ways

8
Safety
RECOGNIZE SAFETY INFORMATION
• This is the safety-alert symbol. When you see his symbol
on your machine or in this manual, be alert to the
potential for personal injury. Follow recommended
precautions and safe operating practices.
FOLLOW SAFETY INSTRUCTIONS
• Carefully read all safety messages in this manual and on your
machine safety signs. Keep safety signs in good condition.
Replace missing or damaged safety sign.
• Learn how to operate the machine and how to use
controls properly.
• Do not let anyone operate without instruction.
• Keep your machine in proper working condition.
• Unauthorized modication to the machine may
impair the function and\or safety and a󰀨ect machine life
PROTECT CHILDREN AND BYSTANDERS
• Before you back, LOOK CAREFULLY behind for
children.
• Clear area of children, pets and bystanders.
HIGHWAY AND TRANSPORT OPERATIONS
Adopt safe driving practices:
• Always drive at a safe speed relative to local
conditions and ensure that your speed is low enough
for a emergency stop to be safe and secure. Keep
speed to a minimum.
• Reduce speed prior to turns to avoid the risk of
overturning.
• Avoid sudden uphill turns on steep slopes.
• Always keep the 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 equipment on public roads.
• Use approved accessory lighting and necessary
warning devices to protect operators of other vehicles
on the highway during daylight and nighttime transport.

9
Safety
HIGHWAY AND TRANSPORT OPERATIONS
• Plan your route to avoid heavy tra󰀩c.
• Be a safe and courteous driver. Always yield to
oncoming tra󰀩c in all situations, including narrow
bridges, intersection, etc.
• Be observant of bridge loading ratings. Do not cross
bridges rated lower than the gross weight at which
you are operating.
• Always operate the truck box in a position to provide
maximum visibility at all times. Make allowances for
increased length and weight of the equipment when
making turns, stopping the unit, etc.
AVOID HIGH PRESSURE FLUIDS
• Escaping uid under pressure can penetrate the
skin causing serious injury.
• Avoid the hazard by relieving pressure before
disconnecting hydraulic or other lines. Tighten
all connections before applying pressure.
• Search for leaks with a piece of cardboard.
• Protect hands and body from high pressure uids.
• If an accident occurs, see a doctor immediately.
DISPOSE OF FLUIDS PROPERLY
• Improperly disposing of uids can harm the
environment and ecology. Before draining any
uids, contact your local environmental agency
for the proper waste disposal methods.
• Use proper container when draining uids. Do
not use food or beverage containers that may
mislead someone into drinking from them.
• DO NOT pour oil into the ground, down a drain, or
into a stream, pond, or lake. Observe relevant
environmental protection regulations when disposing
of oil and other harmful waste.

10
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!
SIGNAL WORDS
Note use of following signal words DANGER, WARNING, and CAUTION with safety messages. The
appropriate signal word for each has been selected using the following guidelines:
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.
EQUIPMENT SAFETYGUIDELINES
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.
Operator should be a responsible adult. DO NOT ALLOW PERSONS TO OPERATE THIS UNIT UNTIL
THEY HAVE DEVELOPED A THOROUGH UNDERSTANDING OF SAFETY PRECAUTIONS AND
HOW IT WORKS.
DO NOT modify the truck box in anyway. Doing so may impair the function and/or safety and could
a󰀨ect the life of the truck box.
Never exceed the maximum capacity of the truck box. By doing so you risk damage to your Demco
truck box. If it’s ability to do a job, or to do so safely is in question DON’T TRY IT.
Review safety instructions with all users annually.
Replace any caution, warning, danger or instruction safety decal that is not readable or is missing.
Location of such decals is indicated in this booklet.
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.
Safety

11
Maintenance Safety
Before performing maintenance
between the frame rails, park
tractor on a level surface, tub
fully dumped, then hydraulic hoses
uncoupled.
If service requires the tub to be
partially dumped follow the proper
safety procedures.
1. Make two tub braces using 1/4” x
3” x 3” angle iron.
2.Raise tub and insert angle iron
over cylinder rod on each end.
(See Photo)
3.After tub is secured in raised
position:
a. Disengage the PTO; relieve the
pressure from the hydraulic
system by jogging control valve
both directions to relieve
pressure from the system.
b. When working on hydraulic
systems, EXTREME caution
must be used to avoid injuries
from high pressure or hot oil.
c. Never attempt to work on
loaded trailer.
Working on hydraulic
systems
DANGER:
Clear area around tractor
of bystanders before
raising tub.
Angle Iron
1/4” x 3” x 3” Angle Iron
(20” Min. Length)
DANGER:
Do not preform
maintenance on tub body
without physically blocking
body and cylinders to
prevent lowering.
Tub and frame
inspections
An important phase of truck box upkeep and maintenance is the inspection
and repair, if any, of all structural steel members of the truck box frame
and tub. It is readily apparent that the frame and tub must be one solid unit
to carry the load safely and quickly without danger of accident or further
damage to the trailer. This also prevents subsequent major repair, cost and
trailer down time.
The need for a complete frame and tub inspection stems from various
reasons:
• Truck box loaded to maximum rated capacity, or greater.
• Rough handling may also cause structural failures of varying
degrees. The failures are the results of metal fatigue due to exing,
twisting, distortion.
Frame and tub failure will show up in the steel frame members as weld
cracks, cracked and loosened steel sections.
To detect any fractures before they become major failures:
• Once a month thoroughly inspect the truck box for any sign of failure
and correct any defects.
• It is desirable to have the truck box completely washed down so all
the joints and welds may be closely viewed.
WARNING: Hydraulic uid escaping under pressure
can have enough force to penetrate the skin. Hydraulic
uid may also infect a minor cut or opening in the skin.
If injured by escaping uid, see doctor at once. Serious
infection or reaction can result if medical treatment is
not given immediately. Make sure all connections are
tight and that hoses and lines are in good condition
before applying pressure to the system. Relieve all
pressure before disconnecting the lines or performing
other work on the hydraulic systems.

12
Safety Decals/Reectors
Important: Install new safety decals and reectors
if the old decals and reectors are destroyed, lost,
painted over or cannot be read. When parts are
replaced that have decals or reectors, make sure
you install a new decal with each new part.
NOTE: New decals and reectors are available from your dealer.
1AQAP2914
1AQAP4361
1AQAP3670
1AQAP3669
1AQAP3669 (1) DANGER (Load Dumping Safety) 8”W x 5-1/2”L
1AQAP3670 (1) CAUTION (Side Dump Checklist and Operating Instructions) 6”W x 7”L
1AQAP2914 (1) WARNING (High Pressure Fluid) 4”W x 4”L
1AQAP4361 (2) DANGER (Frame Area Maintenance) 3”W x 6-1/4”L

13
Safety Decals/Reectors
White Reectors
1AQAT000000
*White Conspicuity Tape is located at both sides of both ends of tub.
Important: Install new safety decals and reectors if the old decals and reectors are destroyed, lost,
painted over or cannot be read. When parts are replaced that have decals or reectors, make sure
you install a new decal with each new part.
1AQAP4097 (4) Decal, CAUTION, Lock Tub Latches
1AQAT000000 (4) White Conspicuity Tape, 2” Wide
*
*
HOW TO APPLY SAFETY DECALS:
1. Be sure that the installation area is clean and dry.
2. Be sure temperature is above 50°F(10°C).
3. Decide on exact position before removing the backing paper.
4. Remove smallest portion of split backing paper.
5. Align decal over specied area and carefully press the small portion with the exposed sticky
backing in place.
6. Slowly peel back remaining paper and carefully smooth remaining portions of decal into
place.
7. Small air pockets can be pierced with a pin and smoothed out using a piece of decal backing
paper.

14
Operating Instructions
Setting the tub to dump
curb-side or road-side.
CAUTION:
Make sure the latches on
each end of the tub are
locked in the same direction.
Failure to do so will result in
damage to the side dump
and/or tractor.
Latch Indicator Flag Open
Latch Indicator Flag Closed
Curb-Side
Dump
Road-Side
Dump
Latch Indicator Flag indicates
direction of dump as shown below.
Before dumping the tub determine
which direction the tub is going
to dump when raised.
All steps are performed on the
driver’s side only.
NOTE:
The following steps must be per-
formed on both the front and the rear
pivots.
Step one:
Pull latch out to release pivot lock
handle.
Step two:
Pull bolt handle towards pivot pin to
lock the tub in the left-hand (road-side)
dump position.
Push bolt handle away from pivot
pin to lock tub in the right-hand
(curb-side) dump position.
Return latch to the locked position.
Step one
Locked
Position
Locked
Position
for right-hand
dumping
Locked
Pivot
Step two

15
Operating Instructions
Tilt the tub part-way several times to ll hydraulic cylinders before
extending cylinders completely. Extend and retract cylinders
completely. Check for proper operation.
First time hookup
charging cylinders
DANGER:
Clear area around
side dump of
bystanders before
charging system.
Filling and
dumping side dump
Dumping:
• Stand clear of load during
dumping operation.
• Operator must remain at controls
during dumping.
• Tub should dump in approx.
20 seconds.
• Do not stop cylinder extension
in middle of cycle, equipment
may upset.
• Do not attempt to dump load on
uneven or unstable ground.
Filling:
• Stand clear of side dump during
lling.
DANGER:
Clear area around
side dump of by-
standers before
lling and dumping
the side dump

16
Maintenance
Lubrication Maintenance • Grease upper and lower
pivot point zerks of both lift
cylinders weekly. (Front lift
cylinder zerks shown)
Lower Upper
Upper
Lower
• If equipped with the remote
grease zerk option, front lift
cylinder zerks can be found
near the curb-side front
pivot. The rear lift cylinder
zerks can be found near the
road-side rear pivot. (Front
lift cylinder zerks shown)
Inspect lights daily
(if equipped)
Inspect hydraulic lines
• Turn on truck lights and
4 way ashers.
• Walk around truck box to
inspect that all lights are
operating.
• Inspect hydraulic lines and
valves for leaks, rubbing,
or crimped lines.
Front
Rear

17
After the rst twenty-four (24) hours of use, perform the
following maintenance procedures:
1. If equipped, check all clearance lights, turn signal
indicators, and stop lights.
2. Inspect hydraulic lines and valves for leaks, cha󰀩ng
or crimped lines.
Break-in procedure
Perform the Pre-Trip checklist whenever the tractor/truck
box has been left unattended.
1. If equipped, check that electrical cord is properly
connected to the truck box plug, and walk around the
truck box to check conditions of lights.
2. Check tub dump latches to ensure they are both set for
dumping to the same side.
Pre-Trip Checklist
Perform the following checks weekly, or if the truck box has not been used for more
than a week:
1. Perform the Pre-Trip and Daily Inspection Checklists.
2. Grease the top and bottom cylinder pins on the front and rear cylinders.
Perform the following checks every thirty (30) days on the hydraulic system:
1. Check hydraulic hoses for cha󰀩ng, crimping and fasten securely.
2. Check for hydraulic leaks.
3. Make sure valves are not leaking and are operating properly.
4. Hydraulic system is entirely dependent upon tractor for its oil supply, pressure and
control. Therefore, the hydraulic system of the tractor must be in good condition
and maintained routinely. Tractor should maintain a steady, clean, oil supply of a
minimum 25 GPM at 2500 PSI for proper dumping performance of truck box.
NOTE: PERFORM THE ABOVE MAINTENANCE ON THE MINIMUM
SCHEDULE, WHICHEVER COMES FIRST.
CAUTION: BE CERTAIN THE PRECEDING CHECKLIST INSPECTIONS HAVE
BEEN PERFORMED.
NOTE: CLEAN HYDRAULIC SYSTEM AT LEAST ONCE PER YEAR.
Inspection and Maintenance Checklists

18
Electrical System
The lights and wiring system on equipped Demco Side Dump truck boxes meet or
exceed all federal and state requirements in e󰀨ect at the time of manufacture. Wherever
required by law, lights and reectors are marked by the manufacturer to indicate the
appropriate specications with which each complies.
For optimum performance and long life from the truck box’s lights and wiring, follow this
inspection procedure:
• Clean all reectors and lights. See that all lights burn properly. Replace all burned
out lights and broken reectors. Factory approved replacement parts should be
used, and replacement bulbs of equal candle power should be used for safety.
• WARNING! Use only a 12 volt DC battery for checking lights. Never use battery
chargers or transformers.
• Inspect all wiring to see that it is not frayed, and that it is properly supported and
protected, with all connections tight. Be certain that the cable is supported so that it
cannot be pinched. Keep the 7-way plug on the light cable and the 7-way connector
on the side dump free of corrosion.
• Never replace fuses or breakers with metal foil or other devices.
• A decal is located near the 7-way connector. You may trace individual electrical
circuits by the wire colors indicated. Refer to the schematic drawing and the decal
for conductor number and wire colors.
BOM ID Qty Item No Description
13* 1AEAP3641 WIRING HARNESS EXTENSION CORD, 60”
2 1 1AEX0088300 HARNESS, LWR, ID 3 PLUG, 60”
3 1 1AEX0088911 HARNESS, REAR S/T/T, RH & LH
4 2 1AEX3270084 HARNESS, FRONT M/C, 84”
51†1AEX8882036 HARNESS, MAIN JUMPER, 36”
6 1 1AEX8983927 HARNESS, FRONT MAIN W/ FEMALE SOCKET
*20’ truck box requires (4)
†Not used on 14’, 20’, & 24’ truck boxes.
*24’ truck box requires (5)
WHITE - Ground YELLOW - Lt Turn
BLACK - Marker GREEN - Rt Turn
RED - Stop BLUE - Auxiliary
BROWN - Tail AP 3674
Wiring Harness Color Code
1AQAP3674
WIRING HARNESS COLOR CODE DECAL

19
Electrical Harness (All Models)
3
1AEX0088911
1AEX0088300
ROAD SIDE
FROM THE
REAR
CURB SIDE
FROM THE
REAR
2
1
1AEAP3641
6
1AEX8983927
4
1AEX3270084
4
1AEX3270084
3
1
1
5
4
4
2
6

20
Hydraulic System
WARNING: Hydraulic uid escaping
under pressure can have enoughforce
to penetrate the skin. Hydraulic uid
may alsoinfect a minor cut or opening
in the skin. If injured by escaping uid,
see doctor at once. Serious infection
or reaction can result if medical treat-
ment is not given immediately. Make sure
allconnections are tight and that hoses
and lines are in good condition before
applying pressure to the system.
Relieveall pressure before disconnect-
ing the lines or performing other work
on the hydraulic systems.
WARNING
Truck-Tractor Hydraulic Systems
E󰀩cient, safe operation of side dump trailers require that the tractor hydraulic system provide
a clean, high pressure, high volume oil supply. The hydraulic pump pressure should be
set at 2500 PSI with a minimum output of 25 GPM supply and a minimum 15 gallon ltered
and strained reservoir.
NOTE:
Hydraulic Oil Filter should be Changed every 25,000 miles or yearly, which ever comes rst
and hydraulic system ushed every 50,000 miles with pressure and ow rates checked.
Generic Tractor Hydraulic System
FRONT
Attach Hydraulic
Lines Here
REAR
“A” - Pressure In
“C” - Return Out