AGRICULTURAL SAFETY

Ford 4000 with CROPS

Completed CROPS Installation

Cost-effective Rollover Protective Structures (CROPS)

The NIOSH Division of Safety Research and Protective Technology Branch has developed a cost-effective rollover protective structures (CROPS) as an alternative to installing commercially available ROPS, which are hard to find, or as an option for older wheeled agricultural tractors for which ROPS are not commercially available. CROPS have been designed for four tractor models: (1) Ford 8N, (2) Ford 3000, (3) Ford 4000, and (4) Massey Ferguson 135. The NIOSH CROPS for each of the tractor models listed was successfully tested in accordance with Society of Automobile Engineers (SAE) industry standard performance test SAE J2194.

The available designs can be used either by

  • an individual to build a NIOSH CROPS for their privately owned tractor
  • a company to build and sell a NIOSH CROPS.

Certain parts must be manufactured by a facility that can bend 0.5-inch-thick plate steel (A572-Grade 50). Other parts can be manufactured using a band saw and a drill press. All welded parts must be welded by a professional welder using the appropriate welding procedures for a minimum temperature of -22°F (-30°C) as stated in the SAE J2194 standard. This is an absolute requirement regardless of temperature ranges in the end users local area.

In addition to having a ROPS or CROPS on the tractor, the tractor operator should always wear a seat belt for maximum protection in the event of a tractor rollover.

Disclaimers

Any deviation from the published designs or the installation of a CROPS on a tractor for which it was not intended will invalidate the performance of the CROPS. In the event of a rollover, operators will not be provided with the level of protection established by SAE J2194.

NIOSH is providing these CROPS designs and installation instructions to the public pursuant to its mission and is not offering any guarantee of any kind. Any user of the designs and installation instructions agrees to indemnify and hold harmless the United States government from any claims, costs, damages or losses that may arise from or through use of the designs and installation instructions. It is further agreed that the user will not by its action bring the United States government into any lawsuit involving the designs or installation instructions.

CROPS shown on Ford 4000
Side view of Ford 4000 with CROPS
     Ford 8N – rear and side views after CROPS installation

The NIOSH CROPS project conducted an outreach, “proof of concept”, effort to collect data from participants on the ease of installation and the acceptance of the product. The outreach efforts included installing the NIOSH CROPS in the states of New York, Virginia, Vermont, Pennsylvania, California, and West Virginia. The installations in New York were facilitated by the New York Center for Agricultural Medicine and Health (NYCAMH) at the NIOSH Northeast Center for Agricultural and Occupational Health (NEC) located in Cooperstown, NY. The installations in Vermont were facilitated by NYCAMH/NEC through a partnership with the University of Vermont Extension. The installations in Virginia were facilitated by the Virginia Farm Bureau. The installations in Pennsylvania were facilitated through a partnership with The Pennsylvania State University. The installations in California were facilitated by the University of California, Davis and the West Virginia installations were facilitated by NIOSH. A total of 82 CROPS were installed in six states through this outreach effort. ( View the 2012 Field Installation Pictures pdf icon[PDF – 2 MB] )

Additional Resource on CROPS

The Southeast Center for Agricultural Health & Injury Preventionexternal icon (SCAHIP) is located at the University of Kentucky College of Public Health in Lexington, KY.

82 CROPS installed as of December 19, 2012

82 CROPS installed as of December 19, 2012</caption
Ford 8N Ford 3000 Ford 4000 Massey Ferguson 135
New York
20
4
7
6
Pennsylvania
5
2
Vermont
7
2
Virginia
2
15
4
5
California
1
1
West Virginia
1

CROPS Installation Information

Ford 8N

CROPS Installation Information: Ford 8N CROPS
CROPS
Testing Informationpdf icon
[PDF-670 KB]
Technical Drawingspdf icon
[PDF-504 KB]
Installation Stepspdf icon
[PDF-1,711 KB] Updated
 Installation Videomedia icon
[wmv-1,857 KB]
No Audio
Field Installation Pictures 2010/2011pdf icon
[PDF-1,536 KB]
Crossover Modelspdf icon
[PDF-128 KB]

 

CROPS Installation Information: Ford 8N Seat Belt
Seat Belt
Testing Informationpdf icon
[PDF-377 KB]
Technical Drawingspdf icon
[PDF-256 KB]
Installation Stepspdf icon
[PDF-653 KB] Updated
 Seat Belt Forward Test Videomedia icon
[wmv-433 KB]
No Audio
 Seat Belt Rear Testmedia icon
[wmv-281 KB]
No Audio

 

Ford 3000

CROPS Installation Information: Ford 3000
CROPS
Testing Informationpdf icon
[PDF-695 KB]
Technical Drawingspdf icon
[PDF-464 KB]
Installation Stepspdf icon
[PDF-1,040 KB]
 Installation Videomedia icon
[wmv-1,522 KB]
No Audio
Field Installation Pictures 2010/2011pdf icon
[PDF-870 KB]
Crossover Modelspdf icon

 

Ford 4000

CROPS Installation Information: Ford 4000
CROPS
Testing Informationpdf icon
[PDF-647 KB]
Technical Drawingspdf icon
[PDF-512 KB]
Installation Stepspdf icon
[PDF-1,248 KB]
 Installation Videomedia icon
[wmv-1,889 KB]
No Audio
Field Installation Pictures 2010/2011pdf icon
[PDF-1,148 KB]
Crossover Modelspdf icon
[PDF-130 KB]

 

Massey Ferguson 135

CROPS Installation Information: Massey Ferguson 135
CROPS
Testing Informationpdf icon
[PDF-672 KB]
Technical Drawingspdf icon
[PDF-498 KB]
Installation Stepspdf icon
[PDF-1,909 KB] Updated
 Installation Videomedia icon
[wmv-1,852 KB]
No Audio
Field Installation Pictures 2010/2011pdf icon
[PDF-951 KB]
Crossover Modelspdf icon
[PDF-131 KB]
Page last reviewed: October 15, 2019