AD07.15-B-7001-06D | MR. (PLD) test of hydraulic system fuel return flow quantity |
| Test of | Test instrument/test connection | Operation/ Requirement | Specified value | Possible cause/Remedy |
1.0 | Fuel return flow quantity at outlet of fuel filter housing. Attach testing and measuring equipment to low pressure fuel circuit | Engine:starting Wait until fuel flows out practically free of bubbles at the measuring line | |||
Idle speed 600 to 650 rpm: | 0,3 l/min. | Fuel return flow quantity at overflow valve too low and within tolerance range at outlet of fuel filter housing | |||
Breakaway speed 2500 rpm: | 0,3 l/min. | Fuel return flow quantity at overflow valve too low and too high at outlet of fuel filter housing | |||
Measuring point: overload valve | |||||
1.1 | Fuel return flow quantity at overflow valve | Engine:starting | |||
Idle speed 600 to 650 rpm: | 0,9 up to 1,7 l/min. | Fuel return flow quantity at overflow valve within tolerance range and can not be measured at outlet of fuel filter housing | |||
Breakaway speed 2500 rpm: | 2,7 up to 7,5 l/min. | Fuel return flow quantity at overflow valve and at outlet of fuel filter housing within tolerance range Fuel return flow quantityat overflow valve too lowand at outlet of fuel filterhousing |