Komatsu BR300J-1(S/N 1001-UP)

The Komatsu BR300J-1 (S/N 1001-UP) is a crawler-mounted, self-propelled mobile jaw-crusher plant from Komatsu's Galeo generation of mobile crushing and recycling equipment, built roughly 1996 to 1998. It runs on a Komatsu SA6D95L-1 six-cylinder turbocharged direct-injection diesel (SA6D95L-1C-C) of 5.88 L displacement with 102 x 120 mm bore and stroke, a mechanically governed engine with no electronic control module, driving an integral fixed single-toggle jaw crusher with an approximately 460 x 910 mm (18 x 36 in) feed opening. Operating weight runs about 28 t (roughly 62,000-64,000 lb), with transport dimensions near 7.6 x 3.0 x 3.5 m. Standard equipment includes a feed hopper, a discharge/product conveyor with hydraulic control valve, an overband magnetic separator, and precleaner screening ahead of the jaw; factory options add a service crane and a water-spray dust-suppression tank. It sits within Komatsu's early mobile-crusher lineup alongside the BR100J and BR200J families, and the later BR310JG-1 shares enough of its operation and maintenance documentation with the BR300J-1 to suggest a close generational relationship, though no confirmed direct-successor designation is documented for this unit.

Compared with later Komatsu mobile crushers, the BR300J-1 predates the electronic engine management and networked diagnostics that became standard on Komatsu's subsequent Tier-compliant crusher lines, so all governing, timing, and fault diagnosis on this unit is handled mechanically rather than through a monitor panel. That keeps the machine mechanically simple to maintain but dependent on manual inspection and periodic recalibration instead of onboard alerts. In the used and parts market, the BR300J-1 remains relevant as a low-cost, rebuildable crusher plant for demolition and construction-and-demolition recycling operators who value the 95-series Komatsu engine's parts commonality with other Komatsu construction equipment of the same era, and as a source of wear parts such as jaw dies, toggle plates, and conveyor components for shops still supporting Galeo-generation crushers in the field.

Below: full specifications, fluids & capacities, the factory service schedule, common service parts, verified fault codes, what owners discuss, attachment guidance, the complete assembly directory, and a serial-number reference. Complete parts lists with full OEM part numbers, exploded diagrams, quantities, and fitment data are available free in Heavy Parts AI.