Project Description

Wilco Model WMB50503018CR Amphibious Hydraulic Undercarriage

Machine Transport Weight: 34,000 kg (75,000 lb)
Ground Pressure:  0.012 kg/sq cm (1.75 psi)
Gradeability:  60%
Travel Speed:  3.0 kph (1.7 mph)
Hydraulic Power Train Components

Pontoon Dimensions

1.5 m (5 feet) high X 1.5 m (5 feet) wide X 9.1 m (30 feet) long-assembled width 5.5 m (18 feet)

Wilco Special Little Giant Model 64 Dragline Upper

Cummings QSB 4.5 120 kW (160 hp) Engine
15.24 m (50 feet) Basic Boom
.76 cm (1 cy) Medium Duty Drag Bucket
Full Revolving Fairlead
Three Sheave Boom Point

Pontoon Construction

High-strength, Low Alloy, Weathering steel plate is used in the fabrication of the Wilco pontoons. This steel had 5-8 times the atmospheric corrosion resistance and 30% more tensile strength than similar size A36 structural plate steel. Each pontoon has 5 bulkheads, providing 6 independent, watertight compartments. The bottoms of the pontoons are reinforced for rough terrain operations.

  • Carbody
    Wilco Manufacturing custom designed flanged center carbody makes assembly and disassembly faster and easier.
  • Track Cleats
    Specially designed marine grade 76 mm (3 inch) wide extruded 6061-T6 aluminum alloy cleats with 2 HDMP wear pads are capable of supporting the pontoons and excavator upper.
  • Track Chains
    Three strands of specially designed, heavy duty, 102 mm (4 inch) pitch marsh buggie track chain are installed on each pontoon. The hardened track chain rollers run in pontoon channels lined with an abrasive resistant wear bar. The drive and idler sprockets are flame hardened to match the hardness of the track chain rollers.
  • Drive Chains
    Engineering Class 78 mm (3.067 inch) pitch, high strength, heavy-duty, offset side bar drive chain is used to transfer power from the sealed, two stage planetary final drive gear boxes to the driven sprockets on the track chain drive sprockets.
  • Hydrostatic Drive
    Power for the pontoon tracks is provide by the Little Giant Dragline upper’s diesel engine and main hydraulic pumps through a Little Giant hydraulic swivel. Hydraulic travel motor/brake combinations are mated to the sealed planetary final drives to provide independent power to each pontoon track. Standard dragline travel controls are used.