Demco CR 33.5 User manual

8C010267, Rev AB
7/10/18
SIDE DUMP
CONVERTER DOLLY
CR 33.5 Converter Dolly Tongue
CR 78 Converter Dolly Tongue
CR 108 Converter Dolly Tongue
CR 120 Converter Dolly Tongue
CR 133 Converter Dolly Tongue
SS-102-4LS Converter Dolly
8C010246, Rev. AB
12-10-2018

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Table of Contents
Introduction........................................................................................................................... 4
Dealer Checklist.................................................................................................................... 6
To The Owner........................................................................................................................ 7
Safety.................................................................................................................................... 8
Torque Requirements............................................................................................................ 12-13
Safety Decals........................................................................................................................ 14-15
Coupling/Uncoupling............................................................................................................. 15-21
Operating Instructions........................................................................................................... 22
Pre-Trip Checklist.................................................................................................................. 23
Maintenance Check List........................................................................................................ 24-26
Full Function Anti-lock Brake System................................................................................... 27-28
Haldex Brake System Troubleshooting Guide...................................................................... 29-35
Adjustment and Operation of Brakes.................................................................................... 36-37
Tires...................................................................................................................................... 38
Wheels Installation................................................................................................................ 39
Wheel Maintenance During Tire Inspection.......................................................................... 40
Axle Inspection...................................................................................................................... 41
Suspensions......................................................................................................................... 42
Suspension Torque Specication.......................................................................................... 43
Troubleshooting Electrical System........................................................................................ 44
Troubleshooting General....................................................................................................... 45-49
Parts
SS-102-4LS, Tandem Spring Ride Converter Dolly.............................................................. 50-55
Converter Dolly Tongue 33-1/2”............................................................................................ 56-59
Converter Dolly Tongue 78”.................................................................................................. 60-63
Converter Dolly Tongue 108”................................................................................................ 64-67
Converter Dolly Tongue 120”................................................................................................ 68-71
Converter Dolly Tongue 133”................................................................................................ 72-75
ABS Brake Parts................................................................................................................... 76
Hutch Suspension Kit............................................................................................................ 77-78
7700/9700 4-Spring Maintenance......................................................................................... 79-83
Hub Pilot Axles...................................................................................................................... 84-104

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In this document you will nd information based on available knowledge
at the time of its publication. To be accurate with the information, every
effort was made but may not cover all details or variations of a trailer 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 trailer. 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
trailers may affect 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 of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

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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 trailer are determined from a
position behind the trailer and facing forward.
Introduction
GENERAL INFORMATION:
Demco requires that you and anyone else who will be operating and maintaining the trailer
read and understand the guidelines in the manual for safe, ef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 trailer 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 Trailer line. Use the table of
contents to locate specic areas of interest.

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Introduction
MODEL NO.__________________________
SERIAL NO.__________________________
DATE PURCHASED___________________
Serial Number
Example: VIN Number Description
57C
Demco
Side Dump
40’ Length
No. of Axles
Model Year Demco
Demco Indentier Number
Trailer Sequence
Check Digit
40
KS 29CT 627 045
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.
In addition to the VIN number Demco has
placed a coded unit number on the chassis
and the tub. Call Demco for location.
Record your trailer model and serial number in the space provided below.
Your dealer needs this information to give you prompt, efcient service
when you order parts.

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1. All hardware properly tightened
2. Proper 5th wheel t
3. Lubrication of grease ttings
4. Lug nuts are tight
5. All decals properly located and readable
6. Lights function properly
7. Air lines tight and no pinched lines
8. Brakes functioning properly
9. Overall condition (touch up any scratches, clean and polish)
10.Operator’s manual
Date Delivered: _____________
Signature of Salesman or Technician:________________________________
PRE-DELIVERY CHECKLIST
Dealer Checklist
To The Dealer:
Inspect the trailer 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 off 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 trailer
7. Demco parts and service policies
8. Have the customer write the trailer 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:______________________________

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To The Owner
Thank you for your recent purchase of a new Demco Side Dump
Trailer. The primary objective of Demco is to build and provide you
with a quality product. 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 trailer 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 trailer.
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

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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 affect 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.

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Safety
HIGHWAY AND TRANSPORT OPERATIONS
• 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,
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 tractor trailer 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.

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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 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.
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 trailer in anyway. Doing so may impair the function and/or safety and could affect
the life of the trailer.
Never exceed the maximum capacity of the trailer. By doing so you risk damage to your Demco trailer.
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