MD6420B

Mining Financial Services
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Overview

Specifications

Units:
Hole Diameter Up to 311 mm (Up to 12.25 in) Up to 311 mm (Up to 12.25 in) Less
Engine QST30 (Non-Cert with Cense) QST30 (Non-Cert with Cense) Less

Operating Temperature

Altitude Up to 4572 m (Up to 15,000 ft) Up to 4572 m (Up to 15,000 ft) Less
Maximum ambient rating (standard) 125.0 ° F 52.0 ° C Less
Minimum ambient rating (standard) -20.0 ° F -28.0 ° C Less

Pull-down/Hoisting Capacity

Adjustable head guide shoes Steel with replaceable Nylatron Steel with replaceable Nylatron Less
Cable sheaves (cylinder) – outside diameter 18.0 in 457.0 mm Less
Cable sheaves (top and bottom) – outside diameter 18.0 in 457.0 mm Less
Cylinder bore – diameter 6.5 in 165.0 mm Less
Cylinder rod – diameter 5.0 in 127.0 mm Less
Number of cylinders 1 1 Less
Retract rate 0-33.5 m/min (0-110 ft/min) 0-33.5 m/min (0-110 ft/min) Less
Sheave guards Standard at bottom plate Standard at bottom plate Less
Type Closed-loop hydraulic (stationary rod, moving barrel) Closed-loop hydraulic (stationary rod, moving barrel) Less

Rotary Drive System

Horsepower capacity 290.0 hp 216.0 kW Less
Drive motor See Hydraulic System See Hydraulic System Less
Gearbox Casting design Casting design Less
Gearing Straight spur Straight spur Less
Lubrication Oil-flooded Oil-flooded Less
Main thrust bearing Taper roller Taper roller Less
Ratio 16 to 1 16 to 1 Less
Torque 0-15 185 N∙m (0-11,200 lbf-ft) 0-15 185 N∙m (0-11,200 lbf-ft) Less

Mast

Construction ASTM 500 grade B rectangular tubing, welded ASTM 500 grade B rectangular tubing, welded Less
Hose rack Sheet steel trough for moving hoses Sheet steel trough for moving hoses Less
Hydraulic lines Pressure-rated steel hydraulic tubing and hose Pressure-rated steel hydraulic tubing and hose Less
Main chord size – Front 203 mm × 102 mm × 9.5 mm (8 in × 4 in × 0.375 in) 203 mm × 102 mm × 9.5 mm (8 in × 4 in × 0.375 in) Less
Main chord size – Rear 152 mm × 152 mm × 13 mm (6 in × 6 in × 0.5 in) 152 mm × 152 mm × 13 mm (6 in × 6 in × 0.5 in) Less
Pivot and raising area Rectangular tubing A frame, reinforced in high-stress areas Rectangular tubing A frame, reinforced in high-stress areas Less

Operator’s Cab

Climate Control Roof-mounted, AC/heating/pressurizing unit Roof-mounted, AC/heating/pressurizing unit Less
Construction Rectangular tubing; 12-gauge steel welded to formed channel and angle supports Rectangular tubing; 12-gauge steel welded to formed channel and angle supports Less
Door latches Heavy-duty latches with lockable handles Heavy-duty latches with lockable handles Less
Floor area 52.22 ft2 4.85 m2 Less
Height inside 76.5 in 1943.0 mm Less
Helper’s seat Fixed folding jump seat Fixed folding jump seat Less
Insulation, wall and ceiling (thermal) 2.0 in 51.0 mm Less
Left door to work deck Swing-type HD hinge Swing-type HD hinge Less
Length at floor 102.0 in 2591.0 mm Less
Location To the right from the mast if facing rear deck from the rear end To the right from the mast if facing rear deck from the rear end Less
Number of doors Two (2) with windows (included in above) Two (2) with windows (included in above) Less
Number of windows 12 12 Less
Operator’s seat One swivel-type with armrests, headrest and retractable seat belt One swivel-type with armrests, headrest and retractable seat belt Less
Other Window wipers and washers Window wipers and washers Less
Right door Swing-type HD hinge Swing-type HD hinge Less
Sound levels 77 dB(A) or less 77 dB(A) or less Less
Type Shock-mounted; two-man, integrated FOPS certified Shock-mounted; two-man, integrated FOPS certified Less
Width at floor 78.5 in 1991.0 mm Less
Windows (tinted safety glass in rubber mounting) 0.25 in 6.0 mm Less

Undercarriage

Brake release Automatic Automatic Less
Brakes Spring set, hydraulic release Spring set, hydraulic release Less
Final drive Independent hydrostatic motors Independent hydrostatic motors Less
Front Three-point oscillating type Three-point oscillating type Less
Maximum drive horsepower per track 290.0 hp 216.0 kW Less
Number of rollers on each side 13 13 Less
Overall length (variable with adjustment) 236.5 in 6007.0 mm Less
Pad type Triple grouser Triple grouser Less
Pad width 29.5 in 750.0 mm Less
Rollers Sealed, oil-flooded Sealed, oil-flooded Less
Track adjustment means Hydraulic with grease gun Hydraulic with grease gun Less
Track drive disconnect Standard (manual) Standard (manual) Less
Tram speed maximum 1.33 mph 2.14 km/h Less
Type Excavator type Cat 349EL Excavator type Cat 349EL Less
Upper track chain support Three (3) carrier rollers Three (3) carrier rollers Less
Width over tracks 161.5 in 4102.0 mm Less

Drill Table and Work Deck

Deck floor material Non-skid floor plate Non-skid floor plate Less
Drill deck width 111.0 in 2819.0 mm Less
Hand rails – Diameter 1.9 in 48.0 mm Less
Table height off ground 57.0 in 1448.0 mm Less

Dust Curtain (Optional Hydraulic Lifters, Front and Rear)

Dust deflector – Diameter 14.0 in 356.0 mm Less
Dust deflector – Thickness 1.0 in 25.9 mm Less
Enclosed area 45.14 ft2 4.2 m2 Less
Location Directly below table bushing Directly below table bushing Less
Material (rubber nylon reinforced) 0.25 in 6.4 mm Less

Hydraulic System

Accessory Circuit/Feed Pump (Open-loop) – Maximum flow 54.0 gal/min 204.0 L/min Less
Accessory Circuit/Feed Pump (Open-loop) – Pressure rating 3000.0 psi 200.0 bar Less
Accessory Circuit/Feed Pump (Open-loop) – Type Axial piston, variable volume, load sense Axial piston, variable volume, load sense Less
Filtration (all filters have indicators and bypass) – Case return 12 micron 12 micron Less
Filtration (all filters have indicators and bypass) – Charge 3 micron 1 per loop 3 micron 1 per loop Less
Filtration (all filters have indicators and bypass) – Loop 12 micron 2 per loop (optional) 12 micron 2 per loop (optional) Less
Filtration (all filters have indicators and bypass) – Main return 12 micron 12 micron Less
Left Track/Rotation Pump (Closed-loop) – Maximum flow 100.0 gal/min 378.5 L/min Less
Left Track/Rotation Pump (Closed-loop) – Pressure rating 5800.0 psi 400.0 bar Less
Left Track/Rotation Pump (Closed-loop) – Type 180 cc axial piston, variable volume 180 cc axial piston, variable volume Less
Pump Drive Gearbox – Drive Rubber coupler/drive shaft to front of engine Rubber coupler/drive shaft to front of engine Less
Pump Drive Gearbox – Type 4 pad 4 pad Less
Right Track Pump (Closed-loop) – Maximum flow 100.0 gal/min 378.5 L/min Less
Right Track Pump (Closed-loop) – Pressure rating 5800.0 psi 400.0 bar Less
Right Track Pump (Closed-loop) – Type 180 cc axial piston, variable volume 180 cc axial piston, variable volume Less
Track Drive Motors (2) – Pressure rating 6000.0 psi 408.0 bar Less
Track Drive Motors (2) – Type Bent piston Bent piston Less

Oil Cooling System (Hydraulic Tank)

Reservoir with sight and temperature gauge 319.0 gal 1208.0 L Less

Operator’s Controls

Filter Indicators Filter indicators for hydraulic fluid system Filter indicators for hydraulic fluid system Less
Filter Indicators Filter indicators for engine and compressor intake Filter indicators for engine and compressor intake Less
Location Console at front and side cab wall, placed 15° to the deck Console at front and side cab wall, placed 15° to the deck Less
Standard Compressor Controls Compressor temperature gauge Compressor temperature gauge Less
Standard Compressor Controls Air pressure gauge Air pressure gauge Less
Standard Compressor Controls Engine shut-off control, high air temperature Engine shut-off control, high air temperature Less
Standard Engine Controls Stop button Stop button Less
Standard Engine Controls Start button Start button Less
Standard Engine Controls Oil pressure (low pressure shut-off) Oil pressure (low pressure shut-off) Less
Standard Engine Controls Coolant level engine alarm and shut-down Coolant level engine alarm and shut-down Less
Standard Engine Controls Coolant temperature/high temperature shut-off Coolant temperature/high temperature shut-off Less
Standard Engine Controls Voltmeter Voltmeter Less
Standard Engine Controls Fuel level Fuel level Less
Standard Engine Controls Tachometer Tachometer Less
Standard Engine Controls Throttle control Throttle control Less
Standard Engine Controls Engine hourmeter Engine hourmeter Less

Leveling Jacks

Counterbalance valves Internal at each cylinder Internal at each cylinder Less
Cylinder bore 7.0 in 178.0 mm Less
Cylinder rod diameter 4.0 in 102.0 mm Less
Cylinder stroke 48.0 in 1219.0 mm Less
Lift capacity (each) 96163.0 lb 428.0 kN Less
Location 2 front, 2 rear 2 front, 2 rear Less
Number 4 4 Less
Pad connection Ball and socket Ball and socket Less

Accessories, Tools and Handling Equipment

Bit Sub – Bottom thread Depends on pipe diameter Depends on pipe diameter Less
Bit Sub – Diameter Depends on pipe diameter Depends on pipe diameter Less
Bit Sub – Top thread Depends on pipe diameter Depends on pipe diameter Less
Deck Wrench – Impact means Stationary jaw, flats at 15° off axis Stationary jaw, flats at 15° off axis Less
Deck Wrench – Location Drill deck Drill deck Less
Deck Wrench – Wrench plate (T1-Steel) 3.0 in 76.0 mm Less
Deck Wrench – Wrench positioning Hydraulic cylinder Hydraulic cylinder Less
HOBO Break-out Wrench – Location Lower left, outside mast Lower left, outside mast Less
HOBO Break-out Wrench – Power Hydraulic cylinders (4) Hydraulic cylinders (4) Less
HOBO Break-out Wrench – Support Mast-mounted Mast-mounted Less
HOBO Break-out Wrench – Wrench type Patented HOBO (Hydraulic Operated Break-Out) Patented HOBO (Hydraulic Operated Break-Out) Less
Top Adapter Sub – Bottom thread Depends on pipe diameter Depends on pipe diameter Less
Top Adapter Sub – Diameter Depends on pipe diameter Depends on pipe diameter Less
Top Adapter Sub – Length 36.0 in 914.0 mm Less
Top Adapter Sub – Top thread (API Reg.) 5.5 in 140.0 mm Less

Compressor (Standard): Oil-flooded, single-stage screw

Air cleaner type Dry-type with safety element Dry-type with safety element Less
Air shut-off Electrically activated valve Electrically activated valve Less
Controls Automatic with safety shut-down Automatic with safety shut-down Less
Discharge air flow (sea level) 56.6 m3/min (2,000 ft3/min) 56.6 m3/min (2,000 ft3/min) Less
Drive Direct coupled to engine flywheel Direct coupled to engine flywheel Less
Maximum operating pressure 100.0 psi 6.9 bar Less
Oil cooling Air-to-oil cooler, thermostatically controlled Air-to-oil cooler, thermostatically controlled Less
Oil filtration 12 micron replaceable element 12 micron replaceable element Less
Oil separation Vertical barrier element, pre-separation in 167 L (44 gal) sump, vertical tank Vertical barrier element, pre-separation in 167 L (44 gal) sump, vertical tank Less

Compressor (Optional): Oil-flooded, single-stage screw

Air cleaner type Dry-type with safety element Dry-type with safety element Less
Discharge air flow (sea level) 67.9 m3/min (2,400 ft3/min) 67.9 m3/min (2,400 ft3/min) Less
Maximum operating pressure 100.0 psi 6.9 bar Less
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Mining Financial Services

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