Rock Breaker Boom
The Earl’s boom is a high strength articulating structure designed to manipulate hydraulic breaker hammers, rock grapples, and rock points. It consists of the following major components; base mount, boom foot swivel, boom, stick and tool mount.
- The boom design is robust, using oversize pins and bushings at all joints.
- A centralised lubrication system maintains a steady flow of grease to every rotating joint.
- Power is provided by a remote hydraulic power pack and most installations have remote controls running to an operator’s booth.
- The motion of the boom is driven by hydraulic cylinders with the exception of the swing motion that uses a double ended cylinder driving a large rack and pinion.
- 10,886 kg/24,000 lbs (no hammer)
Maximum Hammer Weight:
- 3,175 kg/7,000 lbs
- Supply Pressure – 18.6 MPa/2,700 psig (boom only)
- Supply Flow Rate – 140 lpm/37 USGPM (boom only)
- Oil Type – Century Centraulic AF32 or equivalent
- Filtration – Oil filtered to 10 microns on return and pressure lines (minimum requirement)
- Horizontal – 10.5 m/34’6″ (no hammmer)
- Vertical – 5.75 m/18’10” (no hammer)
- Fully automatic (series progressive style) lube system including lube pump, control system, and individual feeders.
- 3 Coat System (Devoe)
- Inorganic Zinc Primer
- Epoxy Intermediate Coat
- Aliphatic Polyurethane Top Coat