Michael Byrne Manufacturing is now offering the most powerful horizontal-boring machine in the industry. The D72-84-1.5 MILHD like all of our machines is designed for the severest duty imaginable.
This 72” machine is also designed to do 84” bores with an optional spacer that raises the centerline while still keeping a low centerline profile. This machine puts out 1,500,000 Lbs. of thrust and 252,000 Ft-Lbs. of torque making it the most powerful machine on the market.
Our machine uses a 300 HP Caterpillar 6 cylinder 8.8 L engine coupled to a 6-speed transmission and the exclusive Michael Byrne Manufacturing planetary gearbox. Our planetary gearbox is specifically designed for boring machines. Handling the severest shock loads, surpassing any of our competitor models. Also included in our gearbox is a push-pull thrust package protecting the complete drive train.
The axial piston pump supplies 57 Gpm to five hydraulic cylinders with a max pressure of 6,000 psi. This pump also supplies the oil for the push block and optional winch.
Our tracks are connected together by heavy duty quick-disconnect track connectors. Michael Byrne designed heavy box constructed frames, for severe conditions to keep proper alignment for successful bores. This machine is a split base design for easy lifting in and out of pits.
All machine gauges and warning lights are in sight operators sight view for easy operation. Also included is an emergency switch for total machine shut down. |
Fuel Capacity: 62 U.S. Gallons
Transmission: FSO-8406A Eaton Fuller
Ratios
1st Gear 7.05:1
2nd Gear 4.13:1
3rd Gear 2.52:1
4th Gear 1.59:1
5th Gear 1.00:1
6th Gear .78:1
Reverse 6.75:1
Planetary Gearbox Ratio 51.44: 1
Auger Drive: 5” Hex
Working Range: 24” to 84” Earth Boring; 144” Pipe Jacking
Machine Torque and Speed Max
1st Gear 251,937 Ft-Lbs (3,023,244 In-Lbs), 6.06 RPM
2nd Gear 147,588 Ft-Lbs (1,771,064 In-Lbs), 10.36 RPM
3rd Gear 90,054 Ft-Lbs (1,080,649 In-Lbs), 16.97 RPM
4th Gear 56,820 Ft-Lbs (681,838 In-Lbs), 26.90 RPM
5th Gear 35,736 Ft-Lbs (428,829 In-Lbs), 42.77 RPM
6th Gear 27,874 Ft-Lbs (334,487 In-Lbs), 54.83 RPM
Reverse 241,216 Ft-Lbs (2,894,596 In-Lbs), 6.34 RPM
Hydraulic System
Pressure 6,000 PSI
Pump Type Axial Piston with Load Sensing
Gallon per Minute 68.4 GPM
Cylinders Five 8” Bore x 36” Stroke
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5 Cylinder Max Thrust 1,507,965 Lbs/3 Cylinder Max Thrust 904,779 Lbs
Suction Strainer 140 Mesh Screen
Pressure Filter 10 Micron Replaceable Element
Return Filter 10 Micron Replaceable Element
Heavy Duty Hydraulic Oil Cooler: Oil cooling provided to allow optimize performance of machine in extreme conditions.
Weights (Approx.) Dimensions
Bottom Base Assembly 16,900 Lbs. Centerline of Bore to Bottom of Track: 41.75”
Top Base Assembly 17,500 Lbs. Machine Height: 101.5”
Master Ring Assembly 4,250 Lbs. Machine Width: 102”
Master Track 7,300 Lbs. Base Track Length: 17 Ft
Extra Track (20 Ft.) 7,100 Lbs.
Centerline of Bore to Bottom of Track: 47 ¾”
84” Adapter kit
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