Trailers for the Navy Seabees

Trailers for the U.S. Navy Seabees


Finished Navy TrailerPortable Carpenters Workshop

Our contract was to design and build a “portable carpenters workshop” capable of performing 24/7 in a wide variety of conditions. A powerful 7-1/2 Hp 16” Radial Arm Saw was the heart and soul of the machine. This saw needed to be 100% self contained with all needed blades, tools, power supply and components mounted on a rugged purpose made trailer.

Trailer Features – Design & Build

The trailer included a diesel generator with transfer switch, a custom storage box for the blades and tools, a lighting system for night use, and a fitted cover to protect the machine from the elements when not in use.

Conveyor storage 'Saw' trailer - rear viewWe designed roller conveyor table extensions to attach to either side of the saw while it was in use, but able to stow in the trailer frame while being towed. We made our own aluminum rollers to conserve weight and reduce corrosion. The combination of aluminum and powder coated steel offers great durability. The conveyors were a “bolt together” design allowing repairs to be made in the field. No tools are required to set up and operate the machine other than to change the saw blade.

24 VDC Military compatible with NATO plug Trailer Brake SystemThe trailer lighting operates on 24VDC making it compatible with military tow vehicles. The trailer light connection uses the 12 pin NATO plug that we soldered to a front wiring harness section terminating at a junction box. Find out more about the 12 pin NATO plug.  All lights are LED.  If you need NATO style plugs they are available in our online parts store.

The trailer includes a mechanical parking brake system of our design, while the service brakes are hydraulically operated surge brakes.

Powder Coat - Military colorsThe trailer frame was designed and built exclusively for this project. The frame and frame components were powder coated in house with the required military color.

Trailer mount storage box Plastic Blade Storage RackA storage box mounted on the front of the trailer provides shelter for a night lighting system and the blades and tools needed to keep the saw up and running. The plastic blade storage rack was designed to protect the blade teeth, eliminate corrosion and to minimize weight.

Saw can be powered from onboard generator or external power source. Custom electrical switch panelWe designed and made a custom electrical transfer switch panel to allow the user to power the saw from the generator, or another alternate power source. The same panel included branch circuit breakers, GFI receptacles and the saw motor magnetic contact.

Custom Designed generator - spill proof cover Kabuta-Stamford 15KW diesel generatorWe were unable to purchase a generator that met all of our requirements for the job, so we designed and built our own unit. A 3 phase 15 KW Kubota-Stamford diesel generator set capable of operating on JP8 jet fuel with a 24volt DC starting and charging circuit was required. Our custom generator base is designed to capture any fluids that could leak such as antifreeze, fuel, or engine oil.

Custom engine control panelMarine grade instrumentsRemote control panelWe made our own engine control and gauge panels. The design included a main panel on the generator, plus a remote panel that allowed the saw operator to start, stop and monitor the engine from the back of the trailer where the sawing operations take place. Marine grade instruments and wiring was used to minimize the possibility of corrosion.

Powder coat aluminum reduces weight and resists corrosion Marine deck hatches allow access to fuel and radiator capsPowder coated aluminum was used to reduce corrosion and weight on our generator enclosure design. Marine deck hatches allow access to fuel and radiator caps while keeping out the elements.

Complete schematics drawn up in-houseAll CAD drawings and schematics were made in house including shop drawings, decals and placards.

MIL-209K Compliant tiedown and lift provisions - Navy Trailer being loadedLifting and tie down provisions were chosen and tested to comply with MIL-209K. These tie downs were proof tested at predetermined tensions using strain gauges on the test fixtures shown. Finally, we created a 250 page Navy trailer technical manual that includes operational instructions, repair and troubleshooting procedures and parts listings with exploded component views where necessary. Exploded parts views Troubleshooting procedures

The Navy ordered 142 of these machines from us. The Navy trailers are delivered to Navy depots where they are loaded onto ships to be delivered worldwide.

Back to Centreville Military & Government

Based in Centreville, Maryland, Centreville Manufacturing builds stock and custom trailers to fit a variety of needs for the government and military market as well as products for rental, residential and business. Municipal & government buyers will find that our innovation and customer service drive the company to provide top quality trailers for sale. With a desire help our government customer on an ongoing basis, Centreville Manufacturing has local trailer parts stores serving customers in Maryland & Virginia and online trailer parts store serving customers nationwide.