U-Max Medium Duty IV 48V Electric Features & Specifications

When your need calls for extra-heavy load capabilities the all-new MD-4 is your clear choice.

Power comes from either a 357cc four-stroke engine or a super powerful 48-volt electric system with 8 6-volt batteries and a large 400-amp controller.

Both are capable of carrying up to 800 pounds in the roto molded cargo box and 4 people. In addition, the new MD-4 comes standard with a host of features including four-wheel brakes, streamline headlights and a 12-volt DC accessory outlet.

 

Accessory Outlet
The 12 volt DC power outlet is dash mounted for convenience.
Armrest
Large armrests on both the driver and passenger sides helps the occupants feel more comfortable and secure.
Body Panels
The U-MAX front body is made of a custom formulated, color-matched thermoplastic olefin, painted with a two-part topcoat of high-luster, automotive-grade polyurethane.
The rear body is made of Vacuum-formed ABS plastic coated with tough UV resistant Solarkote.
Brakes
Mechanical, self-adjusting individual drum-shoe brakes on all four wheels allow you to stop and work anywhere.
Brake Pedal
The U-Max features a re-designed brake pedal with the parking brake located in the top-left corner.
Bumper
Yamaha's energy absorbing bumper releases air upon impact, protecting the body and frame.
Dash Panel
The fully integrated dash boasts cup holders, a forward/reverse switch and two large, easy to clean storage compartments
Easy-Grip Steering Wheel
The thick, textured, easy-grip steering wheel features an integrated notepad clip and pencil holder.
Electric Motor
Yamaha’s powerful and quiet 48-volt high-efficiency, shunt-wound motor features an internal solid-state tachometer and produces 3.8 horsepower.
Floorboard Access Panel
Another Yamaha exclusive, the removable floor access panel allows for quick and easy access to the brake and accelerator components for those rarely needed adjustments.
Floormat
Yamaha's textured floormats are located on both the floorboard and footrest areas.
Frame
Yamaha engineers have minimized welds to provide a seamless tubular ladder-style steel frame, providing optimum strength and rigidity.
Yamaha frames are protected by a eighteen step paint process, which includes an anti-corrosive full immersion phosphate treatment, electro-deposition epoxy-base coating, and an electrostatically applied polyester/urethane powder topcoat.
Genius System™
The technologically advanced Genius System™ allows service technicians to communicate with your vehicle via a wireless infra-red transmission, using a common PDA. This allows diagnostic information to be obtained from the vehicles electrical and battery system and allows the vehicles performance to be adjusted and customized to fit your course or terrains particular needs.
Greaseless Chassis
Yamaha utility vehicles are designed to save you time and money. Higher quality components, such as sealed bearings, automotive grade tie-rods and steering components, never need greasing resulting in a virtually greaseless vehicle.
Headlights & Tail Lights
The U-MAX comes standard with tough tested tail lights and dual 30 watt Krypton multi-reflector style headlights that can be seen on many Yamaha ATV's.
Horn
The standard horn is conveniently located within a foot's reach.
Motor Control Unit
Yamaha's advanced, solid-state controller not only ensures smooth starts and reduced energy usage, it also features anti-roll away protection, reduced-speed reverse and has a regenerative braking system that feeds energy back into the batteries and moderates the car's speed on downhill inclines.
Mud Flaps
Standard front and rear mud flaps protect occupants and cargo from mud and water puddles.
Paint Colors
U-Max utility vehicles are available in Hunter Green.
Run / Tow Switch
Disables power to the electric motor for storage or towing purposes.
Seat
The U-MAX Medium Duty I has comfortable and durable seat cushions made of supple, high-density foam, wrapped in seamless durable fabric-backed vinyl. The cushions are mated to a warp and moisture resistant polypropylene seat bottom.
Tires and Rims
The U-MAX Medium Duty IV has 18 inch tires rated at 4-ply in the front and 6-ply in the rear. Tires are mounted to durable powder coated, gunmetal grey steel rims.
Trailer Hitch
The standard 2 inch receiver accomodates a wide variety of accessories.
U.S. Batteries
The U-MAX Medium Duty IV electric gets its power from top performing US Batteries. With features like superior output capacity, convenient, easy-to-remove speed caps and a 4 year warranty, it only makes sense that the best golf car in the industry should contain the best battery in the industry.
Utility Dump Bed
With a low 27 inch load height, the hydraulic-assisted tilting utility dump bed has a fold and lock tailgate and is made of tough Roto-Molded linear Polyethylene. The bed has side slots so you can add stakeside boards.

 

DIMENSIONS
OVERALL LENGTH 148.6 in (3774 mm)
OVERALL WIDTH 48.9 in (1243 mm)
OVERALL HEIGHT (without suntop) 47.2 in (1200 mm)
WHEELBASE 108.5 in. (2756 mm)
MINIMUM GROUND CLEARANCE 3.8 in. (97 mm)
CARGO BED SIZE (LxWxH) 42.4 in (1077 mm) x 44.2 in (1123 mm) x 9.0 in (229 mm)
POWER SUPPLY/DRIVE TRAIN
MOTOR 48-volt high-efficiency, shunt wound motor with internal solid-state tachometer
OUTPUT RATING 3.8 hp (2.8 kW) for 30 minutes
MOTOR CONTROL UNIT Solid-State microprocessor with high-efficiency MOSFET switching. 400 amp armature output, 30 amp field output
TRANSAXLE Direct coupled transaxle equipped with high-precision helical gears, 14.76:1 drive axle ratio
BATTERIES Eight 6-volt U.S. Batteries, 115 min. @ 75 amp
CHARGER Automatic microprocessor-based SCR regulated charger with I.E.I. type charging profile. 17 amp DC output at 48 volts, 9.5 amp 115 volt AC. Underwriters Labortories (U.L.) Listed. C.S.A. Certified
CHASSIS
FRAME Seamless tubular ladder-style steel frame protected with an anti-corrosive full immersion phosphate treatment, electro-deposition epoxy-base coating, and an electrostatically applied polyester/urethane powder topcoat
FRONT BODY Custom-formulated thermoplastic olefin, painted with a two-part top coat of high-luster automotive-grade polyurethane
REAR BODY Vacuum-formed ABS plastic coated with tough UV resistant Solarkote
STEERING Adjustable worm gear and pitman pin system, permanently lubricated
FRONT SUSPENSION Independent suspension with coil springs and hydraulic shock absorbers, cast aluminum front hubs and permanently lubricated, sealed ball bearings
REAR SUSPENSION Yamaha’s exclusive UltraPath rear suspension with coil springs and hydraulic shock absorbers
BRAKES Mechanical, self-adjusting individual drum-shoe brakes on all four wheels
SEATING Seamless, fabric-backed vinyl over new, high density molded-foam cushions mated to a warp-and moisture resistant polypropylene seat bottom
FRONT BUMPER Energy-absorbing 5 mph bumper
PERFORMANCE
MAX FORWARD SPEED 15 mph (24 km/h)
MAX REVERSE SPEED 7 mph (11 km/h)
TURNING RADIUS 156.7 in (3.98 m)
GENERAL
DRY WEIGHT (less batteries) 891 lbs (404 kg)
TIRE SIZE 18.00 x 8.50-8.00 (4-ply rating front, 6-ply rating rear)
CARGO BED PAYLOAD CAPACITY 800 lbs (363 kg)
CARO BED TYPE Roto-molded polyethylene bed with fold and lock tailgate and hydraulic-assisted tilt
SEATING CAPACITY 4 persons
ACCESSORY OUTLET Dash mounted 12 volt DC power outlet
HEADLIGHTS / TAIL LIGHTS Standard tail lights and dual 30 watt Krypton multi-reflector headlights
WARRANTY
WARRANTY Standard 1 year limited vehicle warranty

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