Michael Byrne Manufacturing is now offering the small but powerful H12-300. This newly designed H12 is for the tough long bores. Now driving the auger is a planetary motor drive, designed to take the heaviest of shock loads. The planetary motor drive now produces a max torque of 1,525 Ft-Lbs. (18,300 In-Lbs.)

To handle the heavy thrust loads is thrust and radial bearing package, that helps to give the planetary motor drive longer life. A flow control valve tied into the hydraulic circuit gives the operator infinite speeds for every boring condition. Also exclusive to the machine is an automatic push block and quick disconnect track connectors. Casing adapters available for standard casing and electric conduit.

The frame is made of heavy structural steel and designed box construction, to handle the severest conditions. Two 3" bore cylinders produce 35,000 Lbs. of thrust. The machine is single base and totally hydraulic.

A 40 HP power unit gives the machine the extra power required for tough bores. Power unit can be left at top of trench eliminating noise and fumes in the pit. The hydraulic system is supplied by 18-gpm gear pump. The power unit is self-contained electric start.

Engine: 40 HP Diesel Engine Water Cooled With Hydraulic Oil Cooler

Displacement 1.24 In^3/Rev; Max Psi 3500

Planetary Gearbox Ratio 36 : 1

Auger Drive: 1 5/8" or 1 3/8"" Hex

Working Range: 2" to 12" Earth Boring

Max Torque 1,525 Ft-Lbs. (18,300 In-Lbs.) , 0-70 RPM

Pressure 3,000 PSI

Pump Type Gear

Gallon per Minute 18.2 GPM

Cylinders (3) 3" Bore x 24" Stroke

Max Thrust 35,000 Lbs.

Suction Strainer 140 Mesh Screen

Pressure Filter 10 Micron Replaceable Element

Return Filter 10 Micron Replaceable Element

Bottom Base Assembly 622 Lbs. Centerline of Bore to Bottom of Track : 11.31"

Master Ring Assembly 85 Lbs. Machine Height : 38.50"

Master Track 150 Lbs. Machine Width : 17.50"

Base Track length : 96"