Abstract
Abstract. PT Trimegah Perkasa Utama is a granite manufacturer in Indonesia. Granite is processed
using a crushing plant. Based on split stone production data at PT Trimegah Perkasa Utama in July
2018, the company's granite stone production target of 180,000 tons / month was not achieved. While
the actual production obtained was 141,114 tons / month or 87.51% of the production target. This is
due to the many disruptions to repair and standby times during the processing of granite stones and
damage to the jaw crusher, so that from these disturbances the effective working time is reduced. The
results obtained after repairing are reduction in repair time and standby time so that the primary
crusher's effective working time becomes 219.53 hours, 38.85% work efficiency and secondary and
tertiary crusher's effective working time to 311.58 hours, work efficiency 53.72%. The value of crushing
plant unit availability will also increase. Primary crusher unit production increased to 162,000 tons /
month after increasing effective working time. Production of secondary and tertiary crusher units can
be increased by setting the gyratory crusher closed side setting to 71 mm and the cone crusher to 23
mm.
Keywords: Crushing Plant, Granite, Jaw Crusher, Production, Repair Time
using a crushing plant. Based on split stone production data at PT Trimegah Perkasa Utama in July
2018, the company's granite stone production target of 180,000 tons / month was not achieved. While
the actual production obtained was 141,114 tons / month or 87.51% of the production target. This is
due to the many disruptions to repair and standby times during the processing of granite stones and
damage to the jaw crusher, so that from these disturbances the effective working time is reduced. The
results obtained after repairing are reduction in repair time and standby time so that the primary
crusher's effective working time becomes 219.53 hours, 38.85% work efficiency and secondary and
tertiary crusher's effective working time to 311.58 hours, work efficiency 53.72%. The value of crushing
plant unit availability will also increase. Primary crusher unit production increased to 162,000 tons /
month after increasing effective working time. Production of secondary and tertiary crusher units can
be increased by setting the gyratory crusher closed side setting to 71 mm and the cone crusher to 23
mm.
Keywords: Crushing Plant, Granite, Jaw Crusher, Production, Repair Time