Search Results

Trials of remote controlled bulldozers show them to be easy to operate. Military advantages of remote controlled bulldozers are: battlefield construction; breaching chemical, radiological, or biological barrier zones; fire fighting; and negociating polar terrain. Commercial applications are: open pit mining; fire fighting; operations in toxic atmospheres; and others.

This paper reports the accomplishments to date, along with the scheduled future projects of the SAE Construction and Industrial Machinery Technical Committee’s Subcommittee XVIII “Human Engineering.” The Committee has developed an SAE Recommended Practice “Male Physical Dimensions - Construction and Industrial Equipment Design” which provides charts and data for use by engineering designers. This Recommended Practice should result in easier and simpler operation and maintenance of equipment through the incorporation of greater standardization, accessibility, legibility, reduced effort, and improved physical comfort.

This is a discussion of the more important factors that contribute to the performance of a moldboard plow and its effect on the tractor. Integral, semi-integral, and drawn plows are covered. Results of many field tests illustrating the influence of the factors discussed are presented in graph form.

This paper describes a deficiency in the geometry of most straight bulldozers that causes excessive side loads in the push arms, especially when equipped with tilt cylinders. The loading on a conventional bulldozer is described, and an ideal geometry that will reduce the maximum loads is defined. Some new designs are proposed that have the proper geometry and reduce the side loads to a minimum.

This paper covers the development and features of a unique narrow aisle gas fork lift truck. It shows how three individually selective types of hydraulic circuits are utilized for a hydrostatic drive to power a rotatable front end - load assembly in a vehicle which is a new approach to narrow aisle stacking. The result is a lift truck which uses narrow aisles for storing material and retains the speed, utility, and endurance of conventional equipment.

An ideal industrial tractor is a loader-tractor combination with a high strength, durable frame, good maneuvering characteristics; easy operation; minimum maintenance; and low cost. The design and specifications of such a unit, the International 3414 loader tractor, is described in this paper.

The purpose of this paper is to properly instruct the user of Epoxy Resin so as to avoid difficulties in constructing Die Aids, Checking Fixtures and Duplicate Body Die Models.

The John Deere Waterloo Tractor Works, as manufacturers of farm tractors, does not manufacture oil seals. We rely on the manufacturers of oil seals for design assistance. After establishing the initial design, laboratory and field tests are required for verification. One of the seal applications is on the crankshaft which must keep crankcase and transmission lubricants separated. Reliability and long life are imperative. Alertness as to the effect of detail changes on seal life is necessary to maintain long service life. The front wheel bearing seals may be subjected to submersion in water and mud. Packing, lip and face type seals have been tested with the face type proving the most rugged, although the most costly of the three types. A problem of design and space which was encountered in a hydraulic pump was overcome by design changes in the seal and in the pump. Constant vigilance on assembly methods and tool maintenance is a requirement to keep quality level high.

Railroad diesel locomotives have been powered with high grade all-distillate type fuels since their introduction. Such fuels have given excellent over-all performance. Recently, stationary locomotive tests conducted on the New York Central Railroad have indicated that a residual-distillate type fuel of 300 SSU viscosity at 100°F. gives satisfactory operation in an EMD F-7 freight locomotive equipped with a 567 B-16 engine when used in conjunction with a dual-fuel system. It is further indicated that the dual-fuel system appears practical for railroad operation. The use of the dual-fuel system was found to be necessary because operation with residual-distillate type fuel at the lower throttle positions was unsatisfactory. Distillate fuel is there fore required in these throttle positions. A field test is now in progress on the EMD F-7 test locomotive equipped with a dual-fuel system and using 300 SSU at 100°F. viscosity residual-distillate type fuel.

The larger the equipment for a specific job in the earth-moving field, the more quickly and efficiently that job can be done. Unfortunately, the very size and weight of many present units means that the transportation of them involves a ponderous task. If increased capacity could be obtained with no increase in gross vehicle weight, and with only negligible differences in dimensions, major progress could be made in the equipment field. Even if physical dimensions involved no problem, the weight and placement of such essentials as tires, wheels, brakes, drive chains and engines, all tend to limit the payload capacity of a given vehicle. Through the judicious use of aluminum alloys in proved applications, a 10 to 15 per cent increase in payload capacity can readily be achieved at no increase in gross vehicle weight. The aluminum applications referred to have been proved both in over-the-road and in off-highway service.

THIS paper outlines tests made to verify the SAE recommended practice for estimating truck ability performance described in TR-82. The author has collected data on four vehicles and compares it with the results computed in TR-82 and with a Method X. The data includes information on air and rolling resistance, effect of wind velocity, chassis friction power, grade ability, and the like. The author concludes that the SAE method of TR-82 is at the present time the most reliable method for computing truck ability.