AD07.15-G-7001-04A | MR (PLD) test of hydraulic system fuel return flow quantity at fuel tank |
| Test of | Test instrument/test connection | Operation/ Preconditions | Specified value | Possible cause/ Remedy | ||
1.0 | Measure fuel return quantity at the fuel tank. Fuel return lines disconnect fuel sensor, remove O-ring and connect this with a clear view line. Collect the return quantity in a measuring container. | Engine: starting Idle speed 560/rpm Measuring time: > Maximum governed rpm 2080 rpm Measuring time > 30 seconds The return quantity consists at the same measuring time as follows: Idling speed Fuel filter, restrictor under overflow valve and unit pump/engine per 0.3 - 0.5 l/min Maximum governed rpm Fuel filter and unit pump/engine per 0.3 - 0.8 l/min |
0.6 - 1.0 l/min 1.0 - 1.6 l/min | Fuel return amount too little Fuel return amount too high | |||