www.highwayguardrail.com Revised: April 18, 2008
7
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.
MPS 350 Safety, Installation, Operation and Maintenance Manual
