Guardian - Frequently Asked Questions (FAQ)
From door seals to fiberglass repair, we at Johnson Truck Bodies are happy to help answer all of your frequently asked questions. Select a category and click on a question to view the answer.
If you have a question that's not answered here, just drop us a line by clicking on the email link: FleetWise@johnsontruckbodies.com. If we feel the question applies to other viewers, we'll add it to this page.
What soaps/detergents should be used to clean the fiberglass body exterior?
A. The exterior can be power washed with a mild detergent that can easily be rinsed away. To prevent the vinyl graphics from becoming loose and/or removed, do not use high pressure or wash too close to the body.
What is the best way to maintain the gloss finish on the seamless exterior of the refrigerated truck body?
A. To restore gloss and protect the finish, the exterior of your fiberglass body should be waxed at least twice yearly. Use only wax recommended for fiberglass and follow instructions carefully. Never wax a gel coat surface in direct sunlight.
What should we use to sanitize the interior of the refrigerated truck body?
A. It is important to establish and maintain a regular cleaning and sanitation protocol for the food product(s) being transported. The seamless fiberglass ArcticTherm™ liner option used in Johnson Premier Bodies is FDA approved for food contact and is designed for easy inspection, power wash cleaning and disinfection.
To determine the requirements for the specific food products that you may be transporting, consult the applicable local, state and national food safety cleaning and sanitation guidelines/requirements.
What are the use/application advantages of your Triple Door seal vs. traditional door sealing methods?
A. The TripleSeal™ gasket has proven extremely effective in solving a special door-opening problem that is created when there is a warm, humid ambient outdoor atmosphere, and a driving rain combined with a dry/very cold or frozen environment inside the truck body.
In refrigerated delivery there are many stops and door openings during a daily route, and the above condition creates a low-pressure situation inside the truck body that frequently "sucks," or pulls the outside elements past traditional door seals and into the body. With the TripleSeal™ gasket, the potential for heat and moisture to enter the body is reduced, significantly improving thermal efficiency. Traditional refrigerated body door seals have been single contact point rubber wiper, or "bulb" type gaskets.
What are the initial purchase/acquisition cost differences between a cold plate vs. mechanical blower?
A. The initial cost savings using a traditional cold plate system compared to a traditional mechanical blower is approximately 40 to 50 percent.
What is the operational cost savings?
A. The recharging electrical cost for a cold plate system is approximately $0.40/hr. The operating cost for a mechanical system, allowing for diesel fuel cost and unit maintenance, is approximately $3.40/hr based on 2,880 operating hours per year and $3.89 per gallon for fuel.
In basic terms, how does a cold plate work?
A. Cold plate refrigeration uses frozen eutectic plates inside the body compartment to absorb heat (very similar to the ice pack used in a picnic cooler) to maintain desired temperature levels. These passive plates are "refrozen" each day during plug-in (plug-in time varies by system). Overall, they are the most reliable refrigeration systems available, and are offered in medium temperature, low temperature and deep frozen product protection ranges.
How difficult/easy is it to repair a damaged fiberglass body?
A. Should there be damage to the exterior or interior of a Johnson fiberglass body, the repair is easy and very similar to that used for a fiberglass truck hood or fender. The end result returns the body to like new condition. Repairability of fiberglass is one of its best characteristics. Damage can be easily repaired with any standard fiberglass repair kit, Bondo and automotive urethane top care that will be indistinguishable from the original. The repaired area will be just as durable as the rest of the body.
What are the benefits of using a high-pressure foam insulation system?
A. The insulation value (R-value), of Johnson's foam insulation is R-7.5 per inch of thickness. The new high pressure foam insulation system and improved foam chemistry produces extremely durable, void-free panels, which contribute to reliability and significant operational savings to maintain required temperatures.
What are the advantages of the fiberglass composite truck body?
A. The fiberglass exterior is the barrier to ambient conditions. It blocks heat from penetrating the truck body because it does not conduct heat and there are no seams or rivets for heat or moisture to pass through. Fiberglass material also absorbs energy from impact better than aluminum and the seamless exterior panels feature a smooth gel coat finish that is ideal for cleaning, decal application and for showcasing company graphics.
Do fiberglass interior body liners meet FDA Food Safety requirements?
A. Johnson's ArcticTherm™ liner (option) meets FDA Food Safety contact requirements.
What can be done to protect the cross sill members on the body underside from rust and corrosion?
A. All Johnson bodies are sealed with a sub pan and totally encapsulated in foam to protect against rust and road chemical corrosion.