In Focus: Fifth wheels

user-gravatar Headshot

Fontaine International

FONTAINE INTERNATIONAL
Models and basic specs

  • 6000 Series: vertical load, 50,000 lb.; drawbar, 150,000 lb.
  • 7000 Series: vertical load, 55,000 lb.; drawbar, 150,000 lb.
  • H5092 Series: vertical load, 62,500 lb.; drawbar, 150,000 lb.
  • X5092 Series: vertical load, 75,000 lb.; drawbar, 200,000 lb.

Fontaine fifth wheels are available for standard-duty, heavy-duty and severe-duty applications. Mounts include sliding and fixed assemblies.

Special features
Fontaine says it is the only fifth-wheel manufacturer to offer both a pressed-steel and a cast-steel fifth wheel. Options include a low-lube 7000 series top plate, air-actuated top plates, blocked heavy-duty fifth wheels and severe-duty fifth wheels.

Design advantages
Fontaine says its advanced TechLock System built into every No-Slack II model delivers the lightest, strongest and simplest standard fifth wheel in the industry. The pull force (65 pounds) required to open the wheel is said to be lower than any other fifth wheel. The patented No-Slack II locking mechanism is designed to automatically eliminate slack to save labor and time, and reduce wear. A special safety trigger makes false couplings virtually impossible, according to the company.


THE HOLLAND GROUP
Models and basic specs

  • FW35 Series: 55,000 lb. vertical, 150,000 lb. drawbar, stationary and sliding;
    cast-steel design, air release, electronic lock indicator.
  • FW31 Series No Lube: 55,000 lb. vertical, 150,000 lb. drawbar, stationary and
    sliding; requires no lube on any component, air release, electronic lock indicator.
  • FW17 Series: 50,000 lb. vertical, 150,000 lb. drawbar, stationary and sliding;
    up to 16 percent lighter than competitors’ lightweight options.
  • FW8 Series: 50,000 lb. vertical, 150,000 lb. drawbar, stationary, sliding and
    Kompensator; lightweight design, air release and other options.
  • FW0070 Series: 70,000 lb. vertical, 200,000 lb. drawbar; stationary, stationary
    with Kompensator and No-Tilt; heavy-duty, cast-steel design with 2- and 31/2-inch
    kingpin locks, sliding and Kompensator brackets.
  • FW2570/7090 Series: 70,000 lb. vertical, 150,000 lb. drawbar, sliding, sliding with Kompensator; heavy-duty, cast-steel design with 2- and 3 1/2-inch kingpin locks, sliding and Kompensator brackets.
  • FW2555 Series: 62,500 lb. vertical, 150,000 lb. drawbar, sliding, sliding with
    Kompensator; FW0070 cast-steel model but available with 2- and 31/2-inch
    kingpin locks on a lightweight, sliding bracket.
  • FW0100: 100,000 lb. vertical, 200,000 lb. drawbar, stationary only; extreme
    heavy-duty, high vertical load, offroad, cast-steel design.
  • FW0165: 165,000 lb. vertical, 200,000 lb. drawbar, stationary only; extreme
    heavy-duty, high vertical load, offroad, cast-steel design.
  • FW2800/2900 Series: 50,000 lb. lift (one cylinder), 100,000 lb. lift (twin cylinders), hydraulic elevating; hydraulic, elevating design used to convert over-the-road tractor to a yard spotter.
  • FW67 Series: 40,000 lb., air elevating; hydraulic, elevating design used to easily convert over-the-road tractor to a yard spotter.
  • FW2870 Series: 100,000 lb. vertical, 150,000 lb. drawbar, stationary, fully oscillating;
    ideal for rough-terrain, offroad applications like coal mines and steel mills.
  • Holland Simplex SE Series: 55,000 lb. vertical, 150,000 lb. drawbar, stationary and sliding; standard-duty, lightweight design of cast steel; air release and other options available.
  • Holland Simplex II SE Series: 70,000 lb. vertical, 150,000 lb. drawbar, stationary and
    sliding; standard-duty, lightweight design of cast steel; air release, right-hand release
    and other options available.


JOST INTERNATIONAL
Models and basic specs

Jost’s basic model is the JSK37USL series, which is a cast ductile iron rated at 50K vertical load and 150K drawbar. The company also offers the JSK37USA top plate, which is for cab-actuated air release on the locking mechanism. The Jost JSK37UWL series offers low-lube technology to include liners on the top plate, eliminating the need for periodic lubrication, and is designed for low-frequency coupling applications such as beverage, tankers, etc. The JSK36USL series employs the same internal parts for the locking mechanism in a fabricated top plate rated at 45K and 150K. The Jost JSK38C model is rated at 70K and 150K.

Special features
The JSK37USL and JSK36USL series, according to Jost, offer the simplest locking mechanism possible with only four moving parts; both come standard with the company’s proprietary cushion ring in the throat area to absorb impact during coupling and eliminate wear to the trailer’s kingpin. The JSK37USA air release retains the secondary locking mechanism featured on Jost’s standard design; it also retains a normal release handle as a manual override to the air release.

Design advantages
Jost fifth wheels are designed for the safety of the positive locking mechanism; two key factors are the kingpin guides that are integral to the casting and eliminate the possibility of false couplings. The rugged locking bar, when engaged, is designed to come completely across the throat, positively locking the kingpin in place. The design also allows the user to quickly rebuild the wheel without the need to remove the top plate from the vehicle.