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Production testing


Construction News travelled to JCB's Ashbourne proving grounds in Derbyshire to evaluate the machine's performance on trenching and back filling tasks. Our test machine was a standard 8045ZTS on 400 mm rubber tracks, equipped with a 1980 mmwide blade, and supplied with one bucket ? a 600 mm-wide general-purpose bucket specifically designed for the two ZTS midi excavators. All measuring and recording equipment was supplied and supervised by Construction News, which would like to thank Roger Salmon, Nigel Chell, demonstrator Paul Hollins and their colleagues from JCB, for their help during this test.

TEST 1: Trenching Test method ? equipped with a 600 m wide bucket, we set the 8045ZTS to work across the plains at Ashbourne, to excavate a 1.2 m deep trench to the width of the bucket. The test was carried out over a 25-minute period with the machine set to operate at full throttle. All soil was discharged alongside the trench and the density of material excavated was estimated at 2166 kg/bank cu m, 1928 kg/loose cu m, and the swell factor was 14 per cent.

SPOT WORK RATE: Trench length: 18.2 m Volume of material excavated: 13.10 cu m bank, 14.94 cu m loose Weight of material excavated: 28.8 tonnes Fuel used: 3.60 litres Duration of test: 25 min 22 sec

THE HOURLY RATE: Output potential ? distance trenched: 43.05 m; weight excavated: 67.14 tonnes Fuel used: 8.52 litres Tonnes excavated per litre of fuel used: 7.88 Test 2 : Back filling Test method ? using the excavator's 1.98 m-wide blade, the 8045ZTS was required to backfill the excavated trench using the earth placed alongside, to test tractive effort and controllability of the machine.

SPOT WORK RATE: Time taken to fill trench: 6 min 54 sec Volume of mater ial dozed: 13.10 bank cu m, 14.94 loose cu m Fuel used: 1.40 litres