After looking at vehicles that were designed for similar situations, we opted to utilize a full seamless round double rail .180 wall 2 1/2 inch main chassis. Each of the four main chassis rails is CNC mandrel bent from a single length of tubing. Without spuds or joining of tubes to produce a chassis rail. Strength analysis tests and FEA stress software testing, has proved this design is tremendously strong.
Engine and Transmission
A Cummins B3.3 tier 4 interim diesel engine, coupled to a performance built GM Turbomatic 350 transmission and ultra duty converter provides a reliable, simple, easily maintained package for the vehicles.
The naturally aspirated engine is rated 65 hp @ 2600 RPM, and 158 lb. ft @ 1600 RPM.
We decided to utilize an ultra duty leaf spring suspension on both the front and rear of the vehicle. A seven-leaf per spring combination complete with polyurethane busings is used on all four corners of the vehicle. Each spring is rated to 3400 lbs. Mounting the suspension directly under the chassis rather than adapting it to the side, adds strength and durability to all of the suspension components.
We use our own custom designed nine inch ford rear end housing. The narrow cast housing uses bolt on axle tubes which allows overall width adjustments. Axles are a unique 31 spline design that are specific to our MUMV’s. A heavy duty clutch style posi unit and a 5.14 gear set, are assembled in a nodular case. We built custom hubs that use 8 lug 3/4 Ford brake rotors. This extremely robust design keeps the drive train operational in the harshest environments.
We designed our own braking system for the MUMV. A four piston, hydraulically assisted caliper is used on all four wheels. Brake pad replacement can be done without removing the brake caliper from its mounting bracket. The caliper is designed to be bolted to all four locations, eliminating confusion and unnecessary brake inventory components. No longer do you need a left front or right rear specific brake caliper. Bleeding the brake system is a very simple process due to a completely vertical design for the bleeder screws.
Sealed Wet Braking
The original MUMV prototype was built using a sealed wet brake on the rear two axles. Although early tests were not successful due to heat and machining tolerances from suppliers, we are in designing our own braking unit. A retrofit for customers who want to change from a standard disk brake to a “wet brake”, will be available soon.
Dana 60 Knuckles and inner C’s designed for extremely rugged environments are mounted to a 2 1/2 in round tube straight axle. The steering is actuated by a hydraulic orbital valve feeding a MUMV specific steering cylinder. From the cylinder to the knuckle, a set of sealed ultra duty tie rods complete the front end. The orbital valve functions even if hydraulic power fails, and the vehicle can be steered safely.
Ride Height of 57.500 inches with 6 foot tall driver.
100 inch wheel base for tight turning radius.
66 inch overall width.
180 inch bumper to bumper length.
4400 lb. dry weight.
17 gallon diesel capacity.
4.5 gallon hydraulic fluid capacity.
Top speed 23 mph.
The J1000 is a driver plus 1 passenger service utility vehicle. A heavy gauge flat bed deck plate allows items to transported safely. A carrying capacity of 3,000 lbs., allows for transportation of large cylinders and equipment.
The J5000 is a driver plus 5 passenger personnel carrier. Two people located in the front, and four located in the bed area. We designed the rear seating area so that the passengers head height is no taller than the persons in the front of the vehicle. We provide comfortable seating for passengers, with a staggered seat arrangement so the two facing passengers will not bang each others knees. Two passengers face backwards, while two face inward towards each other. Head padding for backward facing passengers is provided in case of a situation that stops the vehicle abruptly.
The Engine Carriage System is absolutely the most recognized concept of the vehicle. We decided to take the engine, transmission, cooling system (radiator, fan), electrical system (battery, firewall, dashboard, gauge cluster, fuses, switches, master power cutoff), hydraulic system (filter, fluid reservoir), and place them into a removable carriage.
This means far less downtime if a major component fails. Simply unplug three electrical plugs, unhook one hydraulic feed line and one return line, remove the drive shaft, transmission cross member, and unbolt three motor mounts. Remove the damaged engine carriage, and replace it with another one. It takes under two hours to complete the carriage swap. Get the vehicle out of the shop and back on the clock! Troubleshoot and repair the removed carriage on a stand. It is even possible to start and run the repaired items on the work stand. This allows a mechanic to confirm that the problem has been resolved. Imagine the amount of time a vehicle sits in a shop waiting for replacement parts to arrive.
Explore the most applauded concept of the MUMV.
Frequently Asked Questions
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