Trinity MPS 350 User manual
MPS 350®
Product Description
Assembly Manual
Revised April 18, 2008Part No. 620262B
MPS 350
Mobile Protection System
Safety, Installation, Operation, and
Maintenance Manual
An NCHRP Report 350 - TL3
Truck Mounted Attenuator
Trinity Highway Products, LLC.
2525 Stemmons Freeway
Dallas, Texas 75207
This Manual should be available to the operator at all times. For additional copies, contact
Trinity Highway Products, LLC. at 800-527-6050.
All information, illustrations, and specifications in this Manual are based on the latest MPS 350 information available
at the time of printing. We reserve the right to make changes at any time.
WARNING: When operating this MPS 350, you must follow the safety rules. Please read
these instructions before operating the MPS 350 in order to ensure the safety of the operator
and any bystanders. Failure to follow this warning can result in serious injury to the operator
and/or bystanders. Please keep these instructions for later use.
!
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TABLE OF CONTENTS
THANK YOU...................................................................................................................................3
SAFETY RULES - FOR SAFE OPERATION..................................................................................4
SAFETY SYMBOLS....................................................................................................................4
GENERAL INFORMATION ............................................................................................................9
MPS 350 SPECIFICATIONS ......................................................................................................9
KNOW YOUR MPS 350............................................................................................................10
ORIENTATION CONVENTIONS ..............................................................................................10
PART NAME REFERENCE......................................................................................................10
SHIPPED - LOOSE PARTS LIST .............................................................................................11
RECOMMENDED SPARE PARTS LIST...................................................................................12
MPS 350 INSTALLATION INSTRUCTIONS.................................................................................13
RECOMMENDED TOOL LIST..................................................................................................13
RECEIPT AND INSTALLATION INSTRUCTIONS....................................................................13
OPERATION GUIDELINES..........................................................................................................21
PREVENTATIVE MAINTENANCE............................................................................................21
MPS 350 FUNCTIONS AND FEATURES.................................................................................22
WINCH SYSTEM OPERATION.............................................................................................23
LOWERING THE MPS 350:..................................................................................................26
RAISING THE MPS 350:.......................................................................................................29
CHAIN RETAINER:...............................................................................................................30
USING THE JACKS TO REMOVE THE MPS 350 FROM THE TRUCK: ..............................32
USING THE JACKS TO ATTACH THE MPS 350 TO THE TRUCK:.....................................35
WHEN THE MPS 350 IS HIT....................................................................................................38
NUISANCE HIT.....................................................................................................................38
LOW-SPEED HIT..................................................................................................................39
MEDIUM-SPEED HIT............................................................................................................41
HIGH-SPEED HIT .................................................................................................................41
RAPID FIELD REPLACEMENT OF SHEAR BOLTS................................................................42
APPENDIX DRAWINGS...............................................................................................................43
MPS 350 Safety, Installation, Operation and Maintenance Manual
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CUSTOMER SERVICE CONTACTS
Trinity Highway Products, LLC is committed to the highest level of customer service. Comments regarding
the quality and workmanship of our MPS 350s, their installation procedures, supporting documentation,
and performance are welcome. Our goal is to enhance highway safety through continuous improvement
and innovation. More information can be obtained in the following ways:
CORPORATE CONTACTS:
Telephone: 800-644-7976 (U.S. Calls)
214-589-8140 (International Calls)
Fax: 214-589-8423
Internet: www.highwayguardrail.com
REGIONAL TELEPHONE CONTACTS:
Centerville, Utah 800-772-7976
Dallas, Texas 800-527-6050
Elizabethtown, Kentucky 800-282-7668
Girard, Ohio 800-321-2755
Orangeburg, South Carolina 800-835-9307
International 214-589-8140
THANK YOU
Thank you for placing your confidence in our highway products. Proper maintenance and careful
operation will ensure maximized crash protection for many years. Please read and follow the safety
instructions, warnings and recommendations contained in this MPS 350 Safety, Installation, Operation, and
Maintenance Manual (“Manual”). If you have questions regarding any of this information, please do not
hesitate to contact your Trinity Highway Products’ representative.
To assist you with timely customer service and accurate parts replacement, please have the following
information available when contacting Trinity Highway Products Customer Service.
Date of Purchase: ___________________ Date of Installation: _______________
Installed By:_______________ Date in Service: _________________
Serial Number of MPS 350: ____________________
Serial Number of Winch: ______________________
The serial number of the MPS 350 is located on a foil nameplate on the Bumper Assembly. If the MPS 350
is still on the shipping container, the serial number will also be located on the front of the MPS 350.
The serial number for the Winch is on a tag opposite the black solenoid cover.
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* IMPORTANT SAFETY INSTRUCTIONS *
Always keep this Manual in a location where it is easily accessed by persons who operate or maintain the
MPS 350. Additional copies of this Manual are available from Trinity Highway Products, 800-527-6050.
Please contact Trinity Highway Products if you require additional Manuals or if you have any questions
concerning the information in this Manual or about the MPS 350.
This Manual describes safety symbols and pictographs that may appear on the MPS 350. Read the
Manual for complete safety, assembly, operating, maintenance, repair, and service information.
SYMBOL MEANING
!
SAFETY ALERT SYMBOL
Indicates Danger, Warning or Caution. May be used in conjunction with other symbols
or pictographs. Failure to read and follow the Danger, Warning, or Caution indicators
could result in serious injury or death to the operator and/or bystanders.
WARNING – READ MANUAL
Read the Manual(s) and follow all warnings and safety instructions. Failure to follow this
warning could result in serious injury or death to the operator and/or bystanders.
READ ALL INSTRUCTIONS BEFORE OPERATING
!
IMPORTANT: READ SAFETY INSTRUCTIONS THOROUGHLY AND FOLLOW
THE SAFE OPERATION PRACTICES BEFORE OPERATING THE MPS 350.
Failure to follow this warning can result in serious injury or death to the operator
and/or bystanders.
!
DANGER: Do not operate the MPS 350 near overhead power lines. If the MPS 350 comes
into contact or close proximity with a power line or there is arcing, STAY in the truck cab. Keep
away from any metal parts on the MPS 350. Do not let anyone get close to the truck. Do not
attempt to jump from the truck. The Power Company must disconnect the power before you
can leave the cab.
Know the overhead clearance of overhead obstructions. NEVER drive the MPS 350 under any
overhead obstruction without knowing the clearance height. Failure to follow this warning could
cause damage to the MPS 350 and may result in serious personal injury or death.
!
WARNING: NEVER ATTEMPT TO MANUALLY RAISE THE FRAME ASSEMBLY OF THE
MPS 350. Failure to follow this warning could result in serious injury or death to the operator
and/or bystanders.
!
WARNING: Only APPROVED Trinity Highway Products replacement parts are allowed.
Failure to follow this warning could result in serious injury or death to the operator and/or
bystanders.
SAFETY SYMBOLS
SAFETY RULES - FOR SAFE OPERATION
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!
WARNING: The MPS 350 must be lowered completely until the Frame Assembly’s weight
rest on the Support Chains. Failure to follow this warning could result in serious injury or death
to the operator and/or bystanders.
!
WARNING: Keep clear of the MPS 350 while in operation. Do not sit or stand near, under or
behind MPS 350 while lowering or raising the MPS 350. Failure to follow this warning could
result in serious injury or death to the operator and/or bystanders.
!
WARNING: Ensure that all fasteners are secure. Failure to follow this warning could result in
serious injury or death to the operator and/or bystanders.
!
WARNING: Ensure that the winch strap is tight and without any slack before releasing the
Latch Bar Assembly. NEVER RELEASE THE LATCH BAR ASSEMBLY IF THE WINCH
STRAP IS SLACK. Failure to follow this warning could result in serious injury or death to the
operator and/or bystanders.
!
WARNING: Ensure that no one is near, under or behind the MPS 350 when in operation.
Failure to follow this warning could result in serious injury or death to the operator and/or
bystanders.
!
WARNING: Do not operate the MPS 350 while wearing loose fitting clothing, which may
become tangled in the MPS 350 during operation. Failure to follow this warning could result in
serious injury or death to the operator and/or bystanders.
!
WARNING: Do not use hands or feet to lift or support the MPS 350. Always use Jack
supports provided. Always keep feet clear of frame when in operation and during maintenance
activities. Failure to follow this warning could result in serious injury or death to the operator
and/or bystanders.
!
CAUTION: Failure to ensure proper function of the Limit Switch may result in failure of the
Winch.
!
CAUTION: Inform the truck driver that the MPS 350 is going to be installed, repaired,
operated, or adjusted. Block the wheels. Remove the keys from the ignition of the truck and
place signs on the truck that it is being serviced – DO NOT START ENGINE.
!
CAUTION: When traveling to and from a work zone, travel with the MPS 350 in the Up
(Traveling) Position.
!
CAUTION: While traveling in a moving work zone, NEVER drive faster than 35 mph (55
km/hr) with MPS 350 in a Down (Operating) Position. Speeds slower than 35 mph (55 km/hr)
may be required if bouncing of the MPS 350 occurs.
!
CAUTION: Prior to mounting the MPS 350, verify that the fuel tank(s) on the truck is more
than 10 feet 6 inches (3200 mm) from the rear of the truck. If the distance is less than 10 feet 6
inches (3200 mm) contact your Trinity Highway Products Representative about various
extensions.
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!
CAUTION: Leave adequate (4” minimum) clear area directly behind the Bumper Assembly
and directly in front of the Shear Bars to ensure that the Shear Bars are not obstructed during
an impact. Failure to follow this warning will result in damage to the truck and the MPS 350.
See drawing 33599/SS621 located in the Appendix for more information.
!
CAUTION: Do not leave the Winch Strap tight in the Down (Operating) Position, while the
MPS 350 is being used, the Winch and the attachment point to the Frame Assembly could be
damaged.
!
CAUTION: The Winch Strap on the MPS 350 should ALWAYS wrap over the top of the
Winch Drum to ensure proper function of Winch. (See Figure 24.3)
General Warnings and Cautions
!
WARNING: When installing, repairing, maintaining, operating, or adjusting this MPS
350, you must follow the safety rules. Please read these instructions before
operating the MPS 350 in order to ensure the safety of the operator and any
bystanders. Failure to follow this warning could result in serious injury or death to the
operator and/or bystanders. Please keep these instructions for later use.
Read the instructions carefully. Be familiar with the controls and proper use of the MPS 350 before
installing, repairing, servicing maintaining, operating, or adjusting your MPS 350.
Those who use and maintain this MPS 350 must be thoroughly trained and familiar with the MPS 350.
If used incorrectly or maintained improperly, this MPS 350 could cause severe injury or death to the
operator and/or bystanders.
Only APPROVED Trinity Highway Products replacement parts are allowed. Failure to follow this
warning can result in serious injury or death to the operator and/or bystanders.
Use only approved Trinity Highway Products replacement Shear Bolts when repairing MPS 350 after a
crash or any shearing of the Shear Bolts. (See the following section for details: “When the MPS 350 is
Hit”)
Do not use hands or feet to lift or support the MPS 350. Always use Jack supports provided. Always
keep feet clear of Frame when in operation and during maintenance activities.
Do not operate or service this MPS 350 when tired, ill, or under the influence of alcohol, drugs, or
medication.
Do not operate or service this MPS 350 until you have read this Manual thoroughly. Please call Trinity
Highway Products at 800-527-6050 if you require assistance.
In addition to this Manual, follow all instructions on Safety Warning Labels attached to the MPS 350.
Do NOT operate MPS 350 if any of the Warning Decals are covered by road debris or are otherwise
illegible.
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Installation, Repair, Servicing, and Maintenance Warnings and Cautions
!
CAUTION: Inform the truck driver that the MPS 350 is going to be installed, repaired,
operated, or adjusted. Block the wheels. Remove the keys from the ignition of the truck
and place signs on the truck that it is being serviced – DO NOT START ENGINE.
Attach only Trinity Highway Products approved equipment to your MPS 350. The installation of
unauthorized accessories could cause undesired results during an impact.
Contact Trinity Highway Products before modifying the MPS 350 in any way.
Some of the service operations may require special tools or equipment. Please contact Trinity
Highway Products at 800-527-6050 before attempting these installs, repairs, services, maintenances,
operations, and/or adjustments.
Anytime you will be working on this MPS 350 or its related systems, you must do the following:
oInform the truck driver that the MPS 350 is going to be repaired or serviced, block the
wheels to ensure that the truck does not move, and do not start the truck.
oRemove the keys from the ignition of the truck.
oPlace signs on the truck that it is being serviced – DO NOT START ENGINE.
oDo not use hands or feet to lift or support the MPS 350. Always use Jack supports
provided. Always keep feet clear of Frame when in operation and during installation, repair,
service, adjustment, or maintenance activities.
Do not install the MPS 350 on the truck if the truck’s fuel tank is less than 10 feet 6 inches (3200 mm)
from the rear of the truck. Consult Trinity Highway Products for a bumper extension to get the correct
spacing.
The truck must be loaded to the correct weight before the MPS 350 is installed. The minimum loaded
weight is 15,000 pounds (6,815 kg). This could be different for local regulations. Consult your local
governing specifications.
Use only approved Trinity Highway Products replacement Shear Bolts when repairing MPS 350 after a
crash. (See the following section for details: “When the MPS 350 is Hit”)
Use only Rip Plates from Trinity Highway Products to replace damaged ones in case of an impact.
Make sure the Bumper of the MPS 350 is braced as shown in this Manual. See Figure 9.0.
Operation Warnings and Cautions
!
DANGER: Do not operate the MPS 350 near overhead power lines. If the MPS 350 comes
into contact or close proximity with a power line or there is arcing, STAY in the truck cab. Keep
away from any metal parts on the MPS 350. Do not let anyone get close to the truck. Do not
attempt to jump from the truck. The Power Company must disconnect the power before you
can leave the cab.
Know the overhead clearance of overhead obstructions. Never drive the MPS 350 under any
overhead obstruction without knowing the clearance height. Failure to follow this warning
could cause damage to the MPS 350 and may result in serious personal injury or death.
!
CAUTION: When traveling to and from a work zone, travel with the MPS 350 in the Up
(Traveling) Position.
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!
CAUTION: While traveling in a moving work zone, NEVER drive faster than 35 mph (55
km/hr) with MPS 350 in a Down (Operating) Position. Speeds slower than 35 mph (55 km/hr)
may be required if bouncing of the MPS 350 occurs.
Keep clear of MPS 350 when in operation. Do not sit or stand near, under or behind the MPS 350
while lowering or raising the MPS 350.
Maintain safe distance from the MPS 350 when being raised or lowered.
Do not operate the MPS 350 while wearing loose fitting clothing, which may become tangled in the
MPS 350 during operation.
Do not use the MPS 350 to carry any loads at anytime.
Do not use the MPS 350 to lift things.
The MPS 350 is not a ladder or stool to stand or sit on at anytime.
Ensure that the Winch Strap is tight and without any slack before releasing the Latch Bar Assembly.
DO NOT ATTEMPT TO RELEASE THE LATCH BAR ASSEMBLY IF THE WINCH STRAP IS SLACK.
Use only the Winch to raise and lower the MPS 350 Frame Assembly. DO NOT ATTEMPT TO
MANUALLY RAISE THE FRAME ASSEMBLY OF THE MPS 350.
Do not operate the MPS 350 with a cut, torn, or frayed Winch Strap. Any damage will reduce the
capacity of the Winch Strap. Replace the damaged Winch Strap.
Do not operate the MPS 350 with frayed, damaged or broken wiring. The wiring could cause the
electrical system to short circuit and damage the MPS 350 or Truck.
Allow the Chain Assemblies to support the complete weight of the Frame Assembly when in the Down
(Operating) Position. (See Figure 17.0) The Winch Strap should not carry or support any of the Frame
Assembly weight in the Down (Operating) Position. (See Figure 17.0)
Make sure that all lights work on MPS 350 before leaving the yard.
Make sure that the Limit Switch, located on the Latch Bar Assembly, is operating properly prior to
leaving the yard. This Limit Switch cuts off power to the Winch Motor while the MPS 350 is in the Up
(Traveling) Position. (See Figure 18.0)
Make sure the Latch Bar Assembly operates correctly. The Latch Bar Arm must connect and engage
the Frame Crossmember and allow the Limit Switch to shut off the Winch.
Make sure the height of the Impact Fence is adjusted correctly on level ground. The 12” –14” (305 mm
– 355 mm) height can be obtained by adjusting the Turnbuckles in the Chain Assemblies.
In addition to this Manual, follow all instructions on Safety Warning Labels attached to the MPS 350.
Do NOT operate MPS 350 if any of the Warning Decals are covered in road debris or are otherwise
illegible.
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MPS 350 SPECIFICATIONS
The MPS 350 is a Test Level 3 crash cushion that meets performance guidelines established in National
Cooperative Highway Research Program Report 350. The MPS 350 has passed ALL OF THE
REQUIRED AND OPTIONAL TESTS described in NCHRP Report 350.
The MPS 350 mounts to trucks with a minimum gross weight of 15,000 pounds (6,815 kg).
Installers and operators should consult local standards and specifications for other applicable
guidelines regarding trucks, delineation, and usage.
!
CAUTION: The MPS 350 may be used in stationary and moving work zones. Trucks should
be equipped with headrests and proper restraints for occupant safety.
Weight and Dimensions:
Weight:
Installed ~ 1,600 pounds 727 kg
Shipping 1,876 pounds 853 kg
Length:
Down (Operating) Position 13 feet 8 inches 4.20 m
Up (Traveling) Position 3 feet 2 inches 0.97 m
Width:
With Plastic Nose/Sideboards 6 feet 1.83 m
Without Plastic Nose/Sideboards 5 feet 9 inches 1.75 m
Height:
Down (Operating) Position
At the Controls 45 inches 1.14 m
At the Nose 33 inches 0.84 m
Up (Traveling) Position 12 feet 6 inches 3.81 m
!
IMPORTANT: READ SAFETY INSTRUCTIONS THOROUGHLY AND FOLLOW THE SAFE
OPERATION PRACTICES BEFORE OPERATING THE MPS 350. Failure to follow this
warning can result in serious injury or death to the operator and/or bystanders.
!
WARNING: Keep clear of the MPS 350 while in operation. Do not sit or stand near, under or
behind MPS 350 while lowering or raising the MPS 350. Failure to follow this warning can
result in serious injury or death to the operator and/or bystanders.
GENERAL INFORMATION
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ORIENTATION CONVENTIONS
Figure 1.0 MPS-350 in Down (Operating) Position
PART NAME REFERENCE
Figure 2.0 MPS-350 Major Components Identification
KNOW YOUR MPS 350
Bumper Assembly
Shear
Bolts Shear Bars
Bracket Assembly
WinchElectrical Control Box
Chain Supports Turnbuckles
Frame Assembly
Impact Fence
Pivot Bolt
Strap
Plastic Side Panels Plastic Nose Piece
Limit Switch
Jack Plates Rip Plates
Lower Bumper
Cross Member Latch Bar Assembly Handle
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Part Number 33785B
Rev. B
Dated: 23 June, 2002
Revised: 11 January, 2007
Only APPROVED Trinity Highway Products replacement parts are allowed.
Item Quantity Description Part
Number Shipped By:
Required
1 1 Winch Manual NPN
2 73 Washer, Flat, 3/8" (10 mm) 3051B
3 4 Bolt, HH, 3/8" x 3 1/2" (10 mm x 90 mm) 6078B
4 73 Bolt, HH, 3/8" x 1" (10 mm x 25 mm) 3217G
5 73 Nut, Whiz, 3/8" (10 mm) 3257G
6 1 Pin, Cotter, 3/16" x 2" (5 mm x 50 mm) 5390G
7 1 Pin, Clevis,1" x 8" (25 mm x 200 mm) 5628G
8 1 Light Harness Kit 5677B
9 3 Jacks, Storage 5678B
10 1 Plastic Nose Piece 6081B
11 4 Plastic Sideboard Assembly 6190B
12 1 Plastic Bottom Sheet 6080B
13 8 Bottom Sideboard Strap 7410B
14 8 Top Sideboard Strap 7411B
15 4 Brace, Channel, C4 (C100) 7417B
16 4 Rip Plate, 3/16" x 9" (5 mm x 225 mm) 7468G
17 2 Rip Plate, 16 Gauge x 45" (1145 mm) 7469G
18 2 Rip Plate, 16 Gauge x 9" (225 mm) 7472G
19 2 Rip Plate, 16 Gauge x 21" (535 mm) 7473G
20 1 Pallet or Crate NPN
21 1 Box 6517B
22 1 Box Liner 6518B
23 1 Bolt, HH, 3/8” x 4-1/2” (10 mm x 115 mm) 6323G
Checked by: Date:
SHIPPED - LOOSE PARTS LIST
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The recommended spare parts list is a general listing of parts for your MPS 350. Your Trinity Highway
Products Representative is ready to assist you in determining your specific needs and getting you the
parts to keep your MPS 350 running.
Only APPROVED Trinity Highway Products replacement parts are allowed.
Item Quantity Description Part Number
1 1 Rip Plate Repair Kit, Consisting of the following: 7412B
2 4 Shear Bolt 6078G
3 4 Shear Bolt Nut 3257A
4 4 Rip Plate, 3/16” x 9” long (5 mm x 225 mm) 7468G
5 2 Rip Plate, 16 Gauge x 45” long (1145 mm) 7469G
6 2 Rip Plate, 16 Gauge x 9” long (225 mm) 7472G
7 2 Rip Plate, 16 Gauge x 21” long (535 mm) 7473G
8 2 Side Board Segment, Complete ( Makes One Side ) 6190B
9 1 Nose Piece, Black w/ Yellow Reflective 6081B
10 1 Nose Piece, Red w/ White Reflective 6811B
11 1 Plastic Bottom Sheet, Black w/ Yellow Reflective 6080B
12 1 Plastic Bottom Sheet, Red w/ White Reflective 6812B
13 1 Winch Strap 5637B
14 1 Jack Assembly 5678B
15 4 Shear Bolt 6078G
16 4 Shear Bolt Nut 3257A
17 2 Light Assembly, S/T/T 6083B
18 2 S/T/T Light Assembly, Grommet 6084B
19 1 Light Assembly, Marker 6086B
20 1 Marker Light Assembly, Grommet 6087B
21 2 Frame Retainer Plates 7409B
22 1 Harness, Roadside, S/T/T 6037B
23 1 Harness, Curbside, S/T/T 6038B
24 1 Harness, Marker Lamps 6039B
25 1 Shear Bar Reset Fixture 33779B
26
27
28
29
30
31
NOTE: For Items 9, 10, 11, and 12, pick one of each Plastic Nose Piece and Plastic Bottom Sheet
based on local color requirements.
RECOMMENDED SPARE PARTS LIST
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The following list shows recommended tools for installation of the MPS 350:
Welding Equipment
Cutting Torch
Hammers
Alignment Tool or Drift Punch, Minimum 12” (305 mm) long
Tape Measure
Marking Pens
Impact Wrench, ½” drive
Various Impact Sockets
Various Open End Wrenches
Drill Motor and Bits
Floor Jack or Forklift
RECEIPT AND INSTALLATION INSTRUCTIONS
The following steps will allow you to complete the MPS 350 installation instructions:
IMPORTANT: READ SAFETY INSTRUCTIONS THOROUGHLY AND FOLLOW THE SAFE
OPERATION PRACTICES BEFORE OPERATING THE MPS 350. Failure to follow this warning
can result in serious injury or death to the operator and/or bystanders.
!
WARNING: Keep clear of the MPS 350 while in operation. Do not sit or stand near, under or
behind MPS 350 while lowering or raising the MPS 350. Failure to follow this warning could
result in serious injury or death to the operator and/or bystanders.
!
CAUTION: Inform the truck driver that the MPS 350 is going to be installed, repaired,
operated, or adjusted. Block the wheels. Remove the keys from the ignition of the truck and
place signs on the truck that it is being serviced – DO NOT START ENGINE.
Step Actions
1 Read safety instructions thoroughly before operating the MPS 350.
2 Remove the shipping bands and protective material. Dispose of all shipping materials.
Figure 3.0 Shipping Band Removal
MPS 350 INSTALLATION INSTRUCTIONS
RECOMMENDED TOOL LIST
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3 Remove plastic components (Plastic Nose Piece, Plastic Sideboards, and Plastic Bottom
Sheet) and cardboard box with the Shipped-Loose Parts.
Figure 4.0 Plastic Components and Shipped-Loose Parts Removal
4 Open the Shipped-Loose Parts box and inventory items from the Shipped-Loose List, Part
Number 33785B. (See page 9, Shipped – Loose Parts List) Contact Trinity Highway Products if
parts are missing.
Figure 5.0 Inventory Items From Shipped-Loose Parts Box
5 Attach the three Jacks (Part Number 5678B, item #9 on Packing List) with 4 each 3217g – 3/8”
x 1” Hex Bolts and 4 each 3257g – 3/8” Whiz Nuts found in the Shipped-Loose Hardware Bag.
Drawing 5678B in the Appendix references all the parts.
Lift the MPS 350 off the shipping pallet using the storage Jacks.
Figure 6.0 Jack Attachment Location
Jack Attachment
Location
Remove and Open Shipped-Loose
Parts Box
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6 Confirm the truck is on a flat level ground.
7 Inform the truck driver that the MPS 350 is going to be installed, repaired, operated, or adjusted.
Block the wheels to ensure that the truck does not move, and do not start the truck. (See Figure
7.0)
Remove the keys from the ignition of the truck. Place signs on the truck that it is being serviced
– DO NOT START ENGINE.
8 Add load to the truck. The truck must be loaded to the correct weight before the MPS 350 is
installed. The minimum loaded weight is 15,000 pounds (6,815 kg). This could be different for
local regulations. Consult your local governing specifications.
Figure 7.0 Add Load to Truck to Achieve Correct Weight
9 Move the MPS 350 into position at the back of the truck. Use the Jacks to set the correct
installed height at 36 inches (915 mm) to the center of the Pivot Bolt.
36 inches, plus ½” minus 0 (915 mm plus 12 mm minus 0 mm), (minimum height of 36” (915m)
and maximum height of 36-1/2” (927mm)) must be maintained to allow correct operation of the
MPS 350 during a crash.
Figure 8.0 Position MPS 350 for Attachment to Truck
36 in
9
1
5
mm
Pivot Bolt
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10 Select the best mounting option for your application.
NOTE: All welding should conform to American Welding Standard D1.1 welding procedures.
!
CAUTION: Prior to mounting the MPS 350, verify that the fuel tank(s) on the
truck is more than 10 feet 6 inches (3200 mm) from the rear of the truck. If the
distance is less than 10 feet 6 inches (3200 mm) contact your Trinity Highway
Products Representative about various extensions.
Option A This option uses a ½” (12 mm) plate welded across the back of the truck frame
rails as shown in Figure 9.0 below. Mount Tabs welded to the plate provide
attachment points for the MPS 350 Bumper. The length of the Mount Tabs
should allow ½” (12 mm) of clearance between the Lower Bumper Cross
Member of the MPS 350 Bumper and the Mounting Plate. The Mounting Plate
should be braced to the truck frame using the “C” Channels provided with the
MPS 350. Attach the Channels to the truck frame as far forward as possible
following the truck manufacturer’s recommendations regarding attachment
methods.
Figure 9.0 Truck Mounting Plate and MPS 350 Bumper Assembly
Option B This option involves welding the MPS 350 Bumper directly to the truck frame
rails. Welding on the “C” Channels provided can extend the rails. Adequate
bracing should be welded to the Lower Bumper Cross Member extending
forward as far as possible for attachment to the truck frame rails.
!
CAUTION: Leave adequate (4” minimum) clear area directly
behind the Bumper Assembly and directly in front of the Shear
Bars to ensure that the Shear Bars are not obstructed during an
impact. Failure to follow this warning will result in damage to the
truck and the MPS 350. See drawing 33599/SS-621 located in
the Appendix for more information.
Contact your Trinity Highway Products Representative to discuss any special
mounting requirements for your particular application.
Pivot Bolt
Lower Bumper
Cross Member
MPS 350 Safety, Installation, Operation and Maintenance Manual
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17
11 After the MPS 350 is mounted to the truck, adjust the Impact Fence height using the
Turnbuckles. The gap should measure between 12 to 14 inches (305 mm to 355 mm). This
measurement is from the ground to the bottom edge of the Impact Fence. Remove and store
Jacks for later use. (See Figure 25.0, Operating Height)
Figure 10.0 Adjust MPS 350 to Proper Operating Height
12 Connect the Winch by routing a 1/0 cable from the truck battery to the back of the truck. (See
Appendix Drawing 7555) The use of a welding cable quick-disconnect will allow easy
connection and removal of the MPS 350 from the truck as required; which also allows for easy
routing of the cable. Confirm operation of the Winch and Controls.
13 Push and hold the Controller Switch’s DOWN button while holding the 1” (25 mm) diameter Pin.
Un-spool the Winch Strap until it is long enough to attach to the Cross Frame. Remove the 1”
(25 mm) diameter Pin from the Winch Strap. Position the Winch Strap between the two Cross
Bar Tabs. Thread the 1” (25 mm) diameter Pin through the Cross Bar Tabs and the loop on the
end of the Winch Strap. Secure by inserting the Cotter Pin into the hole in the 1” (25 mm)
diameter Pin and flaring out the ends of the cotter pin. A Cotter Pin is supplied in the Shipped-
Loose parts bag.
Figure 11.0 Press DOWN button to Release Strap Figure 11.1 Straps Released to Cross Frame
Figure 11.2 Position Strap and Insert 1” (25 mm) Pin Figure 11.3 Insert Cotter Pin and Secure
12” to 14” (305mm to 355 mm)
Note That the Strap
is Wrapped Over
the Top of the
Winch Drum
MPS 350 Safety, Installation, Operation and Maintenance Manual
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18
14 Complete the following two steps:
1 Mount the Light System on the MPS 350. Use the Drawing 7481 located in the
Appendix for identification and placement of parts.
Figure 12.0 Lights Location
2 Mount the Junction box on the Lower Bumper Cross Member of the Bumper
Assembly.
The following chart references the wiring color code and function for the
connector wiring.
Wire Color and Function
Wire Color Function
White Ground
Black Tail, Clearance, and ID Lamps
Yellow Left Hand Turn and Hazard
Red Stop Lamp and Antilock
Green Right Hand Turn and Hazard
Brown Tail, Clearance, and ID Lamps
15 Complete the following nine steps:
1 Assemble two Plastic Sideboards to make a Plastic Sideboard Assembly.
Assembly Hardware 3217B - 3/8”x 1” Hex Bolts, 3257B - 3/8” Whiz Nuts and
3051B - 3/8” Flat Washers is in the Shipped-Loose package.
2 Install the upper and lower Sideboard Hangers to the frame. Use the Drawing
7487 located in the Appendix to reference the correct positioning of the Hangers.
3 Hang the Plastic Nose Piece on the Impact Fence first.
4 Insert the hardware 3217B - 3/8”x 1” Hex Bolts, 3257B - 3/8” Whiz Nuts and
3051B - 3/8” Flat Washers in the top holes. Do not tighten them yet.
5 Slip the Plastic Sideboards inside the outer edges of the Plastic Nose Piece. The
Plastic Sideboard and Plastic Nose Piece bolt together in two places as shown in
Drawing 7487 in the Appendix.
6 Insert the hardware 3217B - 3/8”x 1” Hex Bolts, 3257B - 3/8” Whiz Nuts and
3051B - 3/8” Flat Washers in the bottom holes of the Plastic Nose Piece.
7 Match drill the Plastic Sideboards using the Hangers as a guide. Hardware
3217B - 3/8”x 1” Hex Bolts, 3257B - 3/8” Whiz Nuts and 3051B - 3/8” Flat
Washers to mount the Plastic Sideboards is in the Ship-Loose package.
MPS 350 Safety, Installation, Operation and Maintenance Manual
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19
8 Be sure to install the 3051B - 3/8” Flat Washers where 3217B - 3/8”x 1” Hex Bolts
and 3257B - 3/8” Whiz Nuts contact the plastic components (Plastic Nose, Plastic
Sideboard, and Plastic Bottom Sheet) as shown in Drawing 7487 in the Appendix.
9 Tighten all 3217B - 3/8”x 1” Hex Bolts and 3257B - 3/8” Whiz Nuts.
Figure 13.0 Plastic Sideboards and Plastic Nose Piece Installation
16 Raise the MPS 350 to the Up position until the Latch Bar Arms drop into place over the Frame
Crossmenber on the Frame Assembly. The Latch Bar Arms must connect and engage the
Frame Crossmember and allow the Limit Switch to shut-off the Winch. (See the following
section: Raising The MPS 350)
Figure 14.0 MPS 350 in Up (Traveling) Position with Latch Bar Arms in Locked Position
!
WARNING: Keep clear of the MPS 350 while in operation. Do not sit or stand
near, under or behind MPS 350 while lowering or raising the MPS 350. Failure to
follow this warning could result in serious injury or death to the operator and/or
bystanders.
Plastic Sideboards and Plastic Nose Piece
MPS-350 Frame
Assembly in Up
(Traveling) Position
with Latch Bar Arms
Locked in Place
MPS 350 Safety, Installation, Operation and Maintenance Manual
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