MRH Series Rockbreaker Systems

 

MRHNT-draw-340
 

Both high strength and performance are top priorities at stationary crushing plants. This system features maneuverability, durability and reliability.

  • Massive swing frame
  • Large base for support
  • Oversize pins and hardened steel bushings for long life

Features & Benefits:

  • High strength steel (bent, 4-plate) construction 65 ksi tensile strength; 50 ksi yield strength for longer service life
  • Reinforced pivot and mounting pin joints from improved durability
  • Hardened steel bushings in pivot joints and larger diameter pivot pins provide reduced bearing pressure and increased service life
  • Thicker pedestal base plate – 1.5” (38 mm)
  • Pedestal mounting bolt pattern matches TM-H & X series for ease and reduced expense of replacement
  • Increased cross sectional strength of boom and dipper where high stress is realized
  • Common cylinder for hoist (lift), crowd (stick) and curl (tilt) functions
  • Tilt & Lift valve stand for improved serviceability

Coverage Drawing & Data

General Specifications:

Power Packs:

  • 50 HP & 60 HP power pack for BX20 & BX30 respectively
  • 40 HP & 50 HP power pack for BX20 & BX30 respectively in lighter applications
  • High efficient grade main pump drive motor
  • Premium efficient (IEEE841) main pump drive motor (optional energy efficient)
  • Main electric motor altitude acceptance limit: 3,280 ft. (1000 m)
  • High Altitude: motor impeller charge kit > 5,000 ft (1,500 m); and
  • High Altitude: motor altitude deration, provided in 1000 m increments > 3,280 ft. (1000 m) up 16,400 ft. (5000 m)
  • Continuous oil circulation valve for high duty & temperature applications
  • High/low temperature sensor
  • Immersion heater – 2kW (circuit breaker & contactor optional with starter panel)
  • Motor Starter panel (40, 50, 60, 100 or 125 HP mounting & wiring also optional)
  • Remote power pack start / stop panel with indicator switches and lamps
  • Air-to-oil Cooler (std. for BX30 & larger units; opt. for BX20 & smaller units)
  • Water-over-oil Cooler
  • Cold weather conversion kit (with dual immersion heaters, heat tape, etc.)
  • 10 ft. (3 m) Supply hoses –optional longer lengths up to 25 ft. (7.6 m)

Grease Systems:

  • 2-grease system: moly / lithium for boom, chisel past for hammer
  • Individual / point-to-point manual greasing of boom and hammer
  • Manual-Centralized Grease system; Hydraulic auto lubrication system
  • Pneumatic auto lubrication system

Control Systems:

  • Stand-mounted electro-hydraulic joystick remote controller package
  • Portable electro-hydraulic remote joystick controller package
  • Secondary Stand-mounted electro-hydraulic remote joystick controller package
  • Hand-held Radio Remote (transmitter-receiver) joystick controller package
  • IQAN (can-bus) joystick controller package (override handles also optional)
  • 30 ft. (9.1 m) remote control cable
  • > 30 ft. (9.1 m) remote control cable – available up to 100 ft. (30 m)
  • 100 to 200 ft. (30 – 60 m) long distance cable
  • 200 to 400 ft. (60 – 80 m) long distance cable


Pedestal Boom and Hammer Units:
  • Counter-balance valve package
  • Anti-Lunge provision
  • Anti-Blank fire provision
  • Fire suppression system (Ansul: manual, “Automan” or “Check-fire”)
  • Hammer tool – choice of (blunt, chisel, moil; blunt std. on BX20 & larger hammers)
  • Hammer severe duty wear kit with rock claws (separate claws also optional)



MRH ROCKBREAKER SYSTEMS OPERATING WEIGHTS & DIMENSIONS

Boom Model

Operating Weight
(Boom Only)

lbs (kg)

Operating Weight
(Complete System)

lbs (kg)

Length x Width*

in (cm)

Working Length**

in (cm)

Base (LxW)

in (cm)

Breaker Model
Range

MRH16

12,000
(5,443)
17,894 to 22,300
(8,115 to 10,113)
256 x 50
(6,500 x 1,270)
187.8
(4,771)
62.75 x 50.0
(1,594 x 1,270)
BX20 thru BXR85

MRH20

12,400
(5,624)
18,294 to 21,060
(8,297 to 9,551)
302 x 50
(7,673 x 1,270)
234.2
(5,949)
62.75 x 50.0
(1,594 x 1,270)
BX20 thru BXR65

MRH20-25

12,700
(5,760)
18,594 to 20,700
(8,433 to 9,388)
338 x 50
(8,584 x 1,270)
270
(6,858)
62.75 x 50.0
(1,594 x 1,270)
BX20 thru BXR50

MRH25

13,200
(5,986)
19,194 to 21,300
(8,705 to 9,660)
357 x 50
(9,068 x 1,270)
289.1
(7,342)
62.75 x 50.0
(1,594 x 1,270)
BX20 thru BXR50

* less hammer
** swing pivot to dipper stick / hammer mounting pin (on-center) dimension

 

 

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