Test instrument for hydraulic systems - uses hydraulic gear pump to measure throughput with tachometer on pump shaft

摘要

Test instrument for testing the output of open or closed hydraulic systems, especially for agricultural machines and vehicles where the test instrument has a special displays for pressure, temperature and through put of the hydraulic medium. To measure the through put, the test instrument has a conventional hydraulic pump, which runs empty and the pump shaft has a conventional revolutionary speed indicator. The pump is a gear pump and the pump shaft is connected with the speed indicator by a tacho-shaft. An adjustable choke valve or pressure limiting valve is fitted in the test line before the hydraulic pump.