Trinity EagleBed User manual

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©2022-2023 Trinity Trailer Mfg., Inc.
Thank You for Purchasing a Trinity EagleBed
The purpose of this manual is to address:
•Safety
•Warranty Information
•Service and Maintenance
•General Care and Use
•Conveyor Operating Instructions
•Rear Door Operating Instructions
•General Support Information
Please refer to the Table of Contents to locate the needed information. If you have questions about
the truck bed which are not covered in this manual, please call us at [phone] or toll free at
[phone]. Our hours of operation are Monday through Friday, 8:00 a.m. to 5:00 p.m., MST.
This manual is written to cover many versions of EagleBed truck bed. Because of this, some
sections are not applicable to your truck bed. Thoroughly review the manual and any attached
supplements to determine what is applicable to your truck bed.

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Notice: Contents of this manual are subject to change without notice!
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Registration Box

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Notice: Contents of this manual are subject to change without notice!
TABLE OF CONTENTS
Table of Contents 3
Limitation of Warranties 5
Important Safety Information 7
Warning Symbols Used in this Manual 8
Safety Labels 8
Inspection, Service and Maintenance 9
Preventative Maintenance Schedule 9
After the first 20 hours of operation 9
After the first 50 hours of operation 9
Once a month 9
Once a year 10
Truck Bed Installation Guidelines 10
CAUTION 10
Truck Bed to Truck Frame Rubber Strip 10
Mounting Brackets & Bolts 11
Mounting the Truck Bed to an Open Frame 12
Mounting the Truck Bed to a Box Frame 13
Hydraulic and Electrical Connections 14
Hydraulic PTO Connection 14
PTO Pump Pressure Line 14
PTO Pump Suction Line 14
Electrical Connections 15
Truck Bed Lights 15
Truck Bed DC Power Units 15
Truck Bed Side and Rear Door Controls 15
Truck Bed Controls and Operation 15
Control Locations 15
Operating Instructions 15
PTO 16
Electric/PTO Option 17
Adjusting and Lubricating the Conveyor System 18
Tensioning Continuous Belt 18
Bearings and Pulleys 18
Planetary Gearbox 19
Lubrication of the Door(s) 19
Door Operations 20
Opening the Upper Rear Door 20
Closing the Upper Rear Door 20
Lower Rear Door Operations 21
Side Door Operations 21
Coating Care and Corrosion Prevention 21

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Stainless Steel Bodies 22
Cleaning the Interior 22
Hydraulic System Servicing 23
Tractor Hydraulic System Requirements 23
Hydraulic Lines and Fittings 25
Hydraulic Fluid Recommendations 25
Drive and Hydraulic Systems 25
Supplying Power to the Electric Motor 25
Unloading the System 26
General Door Safety 26
General Conveyor Safety 26
Unload Operating Procedures 27
Electric Motor-Driven Hydraulic System 28
PTO Driven Hydraulic System 28
Operate the Conveyor 28
Wiring Diagram 30

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LIMITATION OF WARRANTIES
Goods manufactured by Trinity Trailer Manufacturing, Inc. (“Trinity”) are warranted to
be free from defects in workmanship or material under normal use and service. Trinity
will repair or replace, at its option, any factory-installed part that is defective in materials
or factory workmanship. Trinity is not responsible for any time or income that you lose,
due to a Warranty Claim. Trinity also is not responsible for cost of rental vehicles, fuel,
telephone, travel, meals, or lodging, or the loss of revenue.
WARRANTY WORK
All warranty work must be performed at a repair shop, approved in advance by Trinity.
Trinity reserves the right to ask for Service Records, depending on the claim. Trinity also
has the right to share Warranty Claims with Vendors and Manufacturer partners to help
improve our design and limit our defects
This warranty is applicable if the owner has, as a minimum:
➢Followed proper recommended service intervals.
➢Not overloaded the truck bed (i.e. Exceeded the GVWR* or the GAWR*)
➢Not Side loaded the truck bed.
➢Adequately restrained the load
➢Loaded the truck bed properly
HOW TO SUBMIT A WARRANTY CLAIM
Parts claimed to be defective in materials or workmanship must be brought to the
attention of Trinity Warranty Administrator, or by submitting a form at
www.trinitytrailer.com/warranty/. Trinity has the right to inspect the claim defect and
determine whether the part is covered by this warranty. The Warranty Administrator may
ask for photo confirmation in respect to the claim.
WEARABLE ITEMS ARE NOT COVERED UNDER THIS
WARRANTY
Goods which wear out and have to be replaced during the warranty period. These goods
include but are not limited to: Plastic Liners, Chains, Belts, Light Bulbs, Electrical
Wiring, Paint, Wheel Bearings, Oil and Oil seals, Door Seals, Gaskets, Sealers and
Filters, or normal wear or deterioration of any parts due to inadequate maintenance. The
Warranty herein does not apply and Trinity makes no warranties, expressed or implied
with respect to:

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•TARPS:
Tarps are a wearable item and are not covered by this
warranty; however, Trinity reserves the right to
evaluate each situation.
•COMPONENTS:
Tarp components, (i.e. straps, ratchets, electric tarp
motors, remotes, tarp arms, tarp pipe, return springs,
fasteners.
•FLAPS:
Flaps are wearable items and are not covered under this
warranty.
•MODIFICATIONS:
Items that have been modified by other outside parties.
•LABOR:
Trinity does not pay labor or loss time. However,
Trinity has the right to negotiate labor on a case-by-
case basis through outside repairs
LIMITATIONS AND DISCLAIMERS
Trinity’s sole obligation under this warranty is to repair or exchange, at its option, any
such goods manufactured which are found by Trinity to be defective in workmanship or
materials. Trinity reserves the right to require any products to be returned for inspection
at the buyer’s expense to our facility in Boise, Idaho. The foregoing shall be the sole and
exclusive remedy for any such defects, whether in contract, tort, warranty or otherwise.
Trinity disclaims any responsibility for any loss of time or use of the parts or trailers in
which the parts are installed, transportation, cargo loss, or other incidental or
consequential damage.
In no event shall Trinity be liable for indirect, special, incidental or consequential
damage in connection with or arising out of the sale of goods or furnishing services.
*GVWR (Gross Vehicle Weight Rating)-The structural capability of the trailer when
supported by the kingpin and axles with the load uniformly distributed throughout the
cargo space.
*GAWR (Gross Axle Weight Rating)-The structural capability of the lowest rated
member of the running gear component- suspension and spring system, hub, wheels and
drums, rims, bearings, brakes, axles or tires.

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Important Safety Information
Before attempting to operate, load, unload or do anything with or to the truck bed, YOU
MUST READ THIS MANUAL and become completely familiar with all of its operating
instructions and safety precautions.
To avoid serious injury or death, ALWAYS FOLLOW THESE PRECAUTIONS:
1. Do not allow unqualified, untrained or careless personnel to operate the truck bed. Do not
use the truck bed for a purpose for which it was not intended.
2. Each person at the user’s facility who may be involved with installing, operating, servicing,
inspecting, maintaining or repairing the truck bed must read the complete operating
instructions and carefully study and understand the safety instructions. All actual and
potential operators should confirm their having done so in writing.
3. The truck bed must be serviced and maintained only by authorized and properly trained
personnel. Such personnel must have undergone training by a factory-trained
representative concerning the proper and safe operation of the truck bed. Only the
manufacturer or factory-trained technicians should carry out more than minor repairs.
4. Do not allow anyone who is not physically fit or mentally alert near the truck bed or its
operating area. Be constantly alert to possible hazards on or around the truck bed.
5. Keep a safe distance at all times from any moving parts, including the conveyor.
6. When unloading the truck bed:
a. Long hair must be protected by headgear.
b. Do not wear loose apparel such as ties, scarves, etc.
c. Remove all wristwatches and jewelry.
d. Wear only approved industrial grade eye protection or a face guard to protect against flying
debris.
7. Do not allow tools or other loose objects to be placed on top of or around the truck bed.
8. At the very first sign of any problem and before attempting any troubleshooting or
maintenance, the conveyor must be stopped.
9. Safety features must not be removed, dismantled, altered, put out of operation or relocated.
All guards and safety devices are to be re-fitted and in place after changeovers, servicing or
making repairs and before the truck bed is used. All safety devices must be checked at
regular intervals for correct operation.
10. Do not remove safety signs or warning decals from the truck bed. Product safety signs
should be periodically inspected and cleaned as necessary. Product safety signs should be
replaced when they are no longer legible at a normal viewing distance. Replacements are
available from Trinity Trailer Mfg., Inc.
11. Follow all workplace safety and accident prevention regulations applicable to the operation
of the truck bed. Comply with local, state and/or federal environmental regulations,
including those governing airborne dust particles.
12. Designate a person to be responsible at any given time for installation, commissioning,
operating and repair of the truck bed so the responsibility for safety will not be lost.
13. The truck bed has been designed and built with original Trinity Trailer Mfg., Inc. parts
only. Only original Trinity Trailer Mfg., Inc. parts must be used for maintenance or repair.
Use of other parts will void your warranty.
14. Do not perform modifications to or reconstruction of the truck bed without first getting
written approval from Trinity Trailer Mfg. Inc.

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15. The cleanliness and tidiness of the truck bed and its surrounding area must be ensured
through appropriate instructions, routine inspections and cleaning.
WARNING SYMBOLS USED IN THIS MANUAL
Truck beds have inherent hazards associated with their use. We have made efforts to
minimize these risks through the use of engineering controls. There are certain risks,
however, which cannot be completely eliminated if the design is to remain functional.
The following symbols and classifications of hazards are used in this manual and on the
safety labels on the truck bed.
This is a safety alert symbol. It is used to alert you to potential personal injury hazards.
Obey all safety messages that follow this symbol to avoid possible injury or death.
!WARNING
!CAUTION
CAUTION
SAFETY LABELS
Your truck bed had numerous safety labels affixed to it when it was built; they are shown
throughout this manual. It is important that these labels remain visible and legible throughout
the life of the truck bed. To help ensure they are visible, the truck bed should be cleaned
regularly with water and a mild detergent. Over time the condition and/or color of the labels
may deteriorate due to use of the truck bed and the environment in which it is used. If the labels
should become illegible or lose their color, it is the owner’s responsibility to replace them.
Contact our customer service department at [phone] to order replacements.
This indicates a potentially hazardous situation which,
if not avoided, could result in death or serious injury.
This indicates an imminently hazardous situation which,
if not avoided, will result in death or serious injury.
This indicates a potentially hazardous situation which,
if not avoided, could result in minor or moderate
injury.
A caution statement used without the safety alert symbol
indicates a potentially hazardous situation which, if not
avoided, may result in property damage.

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INSPECTION, SERVICE AND MAINTENANCE
It is important that your truck bed be inspected and serviced on a regular basis to keep it
in a safe and functional condition. Regular maintenance will also save you money in
costly repairs over time.
PREVENTATIVE MAINTENANCE SCHEDULE
We recommend that you follow the general preventative maintenance schedule below.
The intervals given are for nominal operating conditions; service more frequently if the
truck bed is used in overly humid or dusty conditions.
AFTER THE FIRST 20 HOURS OF OPERATION
•Check torque of pulley bushing bolts (Figure 11).
AFTER THE FIRST 50 HOURS OF OPERATION
•Replace the hydraulic oil and filter and check oil levels in all DC power units. Make
certain all air is out of the systems to ensure proper operation
•Replace the oil in the planetary gearbox
•Check truck bed to truck mounting bolts for tightness
•Check rubber strip between the truck bed and truck frame for movement
ONCE A MONTH
•Wash thoroughly with a mild detergent and water
•Check general structural condition for corrosion or cracks
•Check condition of lights
•Check wiring harness for cracking or chafing
•Check hydraulic and pneumatic lines for signs of leakage or wear
•Check hinges on rear and side door(s) for signs of damage
•Lubricate hinges, latches and bearings (if applicable) on rear and side door(s)
•Check conveyor system for excessive wear or damage
•Check condition of tarp system, if installed
•Check condition and security of mud flaps
•Check oil level in planetary gear on conveyor hydraulic and add if necessary
•Check truck to truck bed mounting bolts for tightness
•Check rubber strip between the truck bed and truck frame for movement

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ONCE A YEAR
•Drain and replace hydraulic fluid from reservoir
•Replace hydraulic oil and filter (or every 1,000 hours, whichever is first)
•Replace oil in the planetary gearbox (or every 1,000 hours, whichever is first)
TRUCK BED INSTALLATION GUIDELINES
CAUTION: Please read carefully. The following guidelines cover important points for
safe and proper installation of standard configuration Truck Beds.
Before installing the truck bed:
•Make certain that the width of the truck bed frame rails and the width of your
truck frame rails are compatible. If they are not, please call Trinity Trailer Mfg.,
Inc. at 1-800-235-6577 for installation assistance.
•Place the provided 3”x 3/8” rubber strip (cut to the length of the truck bed frame)
to the top of the truck frame (on both sides). Once the mounting is complete
these rubber strips will help stabilize and cushion the truck bed on the truck
frame rails.
•Place the truck bed on the truck chassis, such that, the front cover is 1 inch
behind the rear of the truck cab or most rearward truck cab protrusion. The rear of
the truck frame should allow the truck bed to lay flat on top of the frame rails
with no interference with the tail section.
•Make certain the Truck Bed ribs clear all tires (including lift axle tires).
•DO NOT WELD MOUNTING BRACKETS TO TRUCK FRAME
TRUCK BED TO TRUCK FRAME RUBBER STRIP
Before installing the truck bed to your truck, you must first place the provided 3”x 3/8”
rubber strip (cut to the length of the truck bed frame) to the top of the truck frame (on
both sides). Once the mounting is complete these rubber strips will help stabilize and
cushion the truck bed on the truck frame rails.

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MOUNTING BRACKETS & BOLTS
Locate the front mounts as far forward as possible and the rear mounts as far back as
possible on both sides of the truck bed. Center mounts should be located approximately
halfway between the front and rear mounts.
If the truck frame is wider than the truck bed frame, spacers will need to be placed behind
the respective mounts. Enough 1/8” (0.125”) spacers are required so that the mounts
make minimal contact with the truck frame.
Because of the variations in truck beds/trucks, the required 5/8” bolts (Grade 5
minimum), washers and nyloc nuts used to connect these components are not supplied
and must be purchased in order to correctly mount the truck bed to the truck frame.

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Open Channel Frame Mounting
1) Line up the holes in the top “L” shaped
bracket with the ones on the truck bed
frame rail and place a Grade 5, 5/8” nut
and bolt. Do not tighten the nut and bolt
at this time.
2) Place the bottom bracket (with the pivot
bolts loose) onto the bottom flange of the
truck’s frame and push it up against the
frame rail.
3) Use an appropriate Grade 5, 5/8 bolt,
washers, and nyloc nut to attach the top
“L” bracket to the swivel on the bottom
clamp.
4) When the mount is in place, as shown,
tighten all nuts and bolts, including the
pivot bolt.
Figure 1- Truck Bed
(Open Frame) Mount
Figure 2- Truck (Open Frame) Mount
Figure 3- Completed Install

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Closed/Box Frame Trucks
Figure 4- Bed Bracket (Closed Frames)
Installed.
1) The bed mounted components will be
bolted to each side using pre-existing
holes in the bed frame rails. The
truck mounted components are bolted
to the rails of the truck frame. Note:
holes will need to be drilled in the
truck frame rails.
2) Attach the truck bed mounts to the
truck bed with 2 grade 5, 5/8” bolts,
of the appropriate length. Secure
with 2 (one on each side) flat washers
and nyloc nuts.
Figure 5- Truck Mount Installed (Blue)
3) Clamp one truck bracket to each of
the already installed bed brackets.
The truck brackets will be used as a
drill guide to put the mounting holes
in the truck frame.
4) After the holes are drilled, mount the
truck bracket to the truck frame with
Grade 5, 5/8” bolts of an appropriate
length. Secure with flat washers (one
on each side) and nyloc nuts.
Figure 6- Drill guide to complete Closed Frame
Mount.
5) The truck bracket is used as a drill
guide to complete the mounting holes
in the bed bracket.
6) Fasten the bed bracket to the truck
bracket with Grade 5, 5/8” bolts of an
appropriate length. Secure with a flat
washer on each side of the bracket,
and secure with a nyloc nut.
7) Tighten all bolts sufficiently tight
that the assembly does not shift.

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HYDRAULIC AND ELECTRICAL CONNECTIONS
HYDRAULIC PTO CONNECTION
Figure 7- Front PTO & Electric Connections
No PTO hoses or pump are supplied with customer installed truck beds because of the
variation in truck bed mounting. These parts are available for purchase and installation
through the Trinity Service department. It is strongly advised that if your PTO system
does not have a pressure relief valve and filter that these items be installed before
using your truck bed to ensure system protection.
PTO PUMP PRESSURE LINE
If your truck bed has PTO system, the pressure line from the PTO pump connects
to the 3/4" hose (coming from the flow control valve located at the rear of the
truck bed) terminating at the front of the truck bed. A capped 1” NPT Male hose
fitting is supplied for this connection.
PTO PUMP SUCTION LINE
If your truck bed has PTO system, the suction line from the PTO pump connects
to the 1" hose (coming from the oil tank) terminating at the front of the truck bed.
A capped 1” NPT Male hose fitting is supplied for this connection.

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ELECTRICAL CONNECTIONS
TRUCK BED LIGHTS
Your truck bed wiring terminates at the end with a pre-wired 7-way socket. A
companion pre-wired 7-way plug is included in the ship loose package and must
be wired into the truck wiring system. Once wired in simply plug both ends
together and check your lights for correct operation.
Some Eagle Bed models have a 16-2 wire, terminated near the front driver side,
which must be wired into the truck wiring system. Once wired in check your
lights for correct operation.
TRUCK BED DC POWER UNITS
In the front of the truck bed there is a pre-wired 2-way socket. A companion
pre-wired 2-way plug is included in the ship loose package and must be wired
into the truck wiring system. The red wire must be connected to the battery
positive post. A 200-amp breaker and the black wire must be connected to the
battery negative post. It is recommended that the 200-amp breaker be installed
in the battery box.
TRUCK BED DOOR CONTROLS
Located in the front of the truck bed are two pre-wired 4-way sockets. Two
companion 4-way plugs, pre-wired with 16-3 wire, are included in the ship loose
package and must be wired into the cab mounted switches for the side and rear
doors. Once the DC Power Units and Cab Switches are wired, test the door
controls for correct operation. Note: a third pre-wired switch, located at the
driver side rear of the bed, must also be tested at this time. No additional wiring
is required for this third switch.
TRUCK BED CONTROLS AND OPERATIONS
CONTROL LOCATIONS
The controls to operate the rear door are located in the cab and on the driver side rear tail
fin. The conveyor control is also located on the driver side rear. The switch to control the
side door (if equipped) is located inside the truck cab. This unit is designed for use by a
single operator.
OPERATING INSTRUCTIONS
1. Make sure area is clear when backing up to equipment. Make sure discharge tail fins
are properly aligned with other equipment.

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2. Make sure all hydraulic controls are in the off position. (Flow control valve off.)
PTO
Figure 8- Rear PTO Controls
1. Engage PTO.
2. Conveyor operation is now controlled with the flow control valve located on the rear
tail fin.
3. After load is discharged return the flow control handle to the off position.

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Figure 9- Rear PTO/Electric Controls
ELECTRIC/PTO OPTION
1. Connect pigtail to power source.
2. Switch on the electric motor with the power switch located on the shaft mount.
3. Open rear door slowly, the toggle switch to operate the door is located on the tail fin
above the power switch.
4. To operate the conveyor, slowly move the flow control valve handle located on the
rear tail fin until the desired speed is obtained.
5. When load has fully discharged, close the flow control handle, turn off the power
switch and disconnect pigtail from the power source.

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ADJUSTING AND LUBRICATING THE CONVEYOR
SYSTEM
Figure 10- Continuous Belt Adjuster Ratchet
TENSIONING CONTINUOUS BELT
•Front nominal ratchet length of 21.5”.
•Rear nominal ratchet length of 25.75”.
oMay be less due to variations in belt stretch.
•With these initial values set, and the rear doors open, run the belt and
observe the belt tracking.
•Turn the system off, and adjust the 4 ratchets.
•Repeat the above steps until the belt tracks straight and does not rub the
sidewalls at any point.
BEARINGS AND PULLEYS
The bearings on the belt rollers must be inspected and lubricated at regular intervals using
an NLGI Grade 2 general-purpose grease. The amount of lubrication is dependent upon
the amount of use.
•Under daily use, daily inspection is required. Lubricate as needed.
•Under all other uses, weekly inspection should be sufficient. Lubricate as needed.
•Inspect pulleys for excessive wear or damage.

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Figure 11- Torque value and pattern for pulleys.
!WARNING
PLANETARY GEARBOX
When using the planetary gearbox under normal temperature ranges between 0-120 °F,
the gearbox is to be half full of SAE 80/90 oil. Use the lower of the two plugs to check
the level of the oil on 48" belt truck beds and on 25" and 31" belt truck beds use the 1/8"
plug. Oil is to be changed after the first 50 hours of operation with subsequent changes
every 1000 hours or yearly, whichever comes first.
LUBRICATION OF THE DOOR(S)
Door hinges and bearings must be lubricated regularly, especially if the truck bed has
been operated or stored for an extended period of time in a humid or wet environment.
Corrosion can lead to the failure of door hinges if they are not maintained properly. As a
Attempting to lubricate the bearings while the shaft is
rotating can result in serious bodily injury or death.
Stay clear of the bearings while they are rotating.
Completely disable the hydraulic system before doing
any maintenance on the bearings.
NOTE
There is absolutely no warranty, expressed or implied, on the conveyor
or drive system if the system is not maintained properly, is misused or is
overloaded. This includes, but is not limited to the hauling of corrosive
materials such as fertilizer, sludge, brewer’s mash or corn gluten.

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general rule with the rear and side doors, as with the entire truck bed, “if it moves,
lubricate it.” Use an NLGI Grade 2 general-purpose grease on all shafts and grease
zerks.
The seals on most doors should have silicone grease or spray-on lubricant applied to them
once every three months. This will help them last longer and will help them provide a
better seal. During cold, damp weather or under heavy use, apply the grease more
frequently.
DOOR OPERATIONS
!WARNING
!WARNING
Opening the Fold-Down Spud Door (Figure 12)
a) Release the two latches at the sides of the fold-down door by raising the lever and
sliding the latch towards the center of the door.
b) Untie the draw rope.
c) Gently lower the door using the draw rope to keep it from falling rapidly.
Figure 12- Rear Upper Door Diagram
Figure 13- Lower Door Switch
Do not get behind a loaded truck bed with the
door(s) open. The truck bed’s contents could
spill on you causing serious injury or death.
Door can crush and cut. Keep away from door
while operating to prevent bodily injury.