Fault phenomenon | Main reason analysis | Method of exclusion |
1 Tax-controlled dispensers do not have oil | (1) There is not enough oil in the tank to cover the double bottom valve (2) Bottom valve blockage or failure (3) Leakage in the oil pipeline (4) Pump shaft stuck (motor does not turn or belt slips) (5) The direction of rotation of the pump does not match the direction of the arrow (6) The triangular belt is too loose and the pump speed is insufficient (7) Pump wears heavily (8) The pump relief valve is stuck and cannot be closed (9) Leaked air in the low pressure chamber of the pump or separator (10) The separator outlet valve is stuck and cannot be opened (11) The flow meter stuck | (1) Add oil (2) Clean the bottom valve or replace (3) Sealing performance of inspection pipelines and related end surfaces (4) Check the oil pump (5) Reverse two phase lines (6) Tighten the V-belt properly (7) Replace blade or oil pump (8) Checking overflow valve (9) Check whether the connecting surface of each channel of the low pressure chamber is sealed, whether the shell is damaged or whether there is internal leakage. (10) Check the outlet valve (11) Recheck the flowmeter to check for foreign matter or damaged parts |
2 Significant reduction in oil output | (1) Same as 1, 2, 3, 6, 7, 9 (2) Separator filter felt plugging (3) Blockage of the pipeline (4) Check if the solenoid valve core assembly is working properly or if its internal diaphragm is deformed | (1) Same as the above method (2) Cleaning or replacing the oil filter (3) Check the internal and external piping channels (4) Check the electromagnetic valve control circuit or solenoid valve coil for damage, and if the valve core is stuck |
3 oil and gas separator exhaust pipe oil | (1) The oil float float breaks into the oil, and it does not float up (2) Parallel valve does not open or block (3) Defective high and low pressure chamber diaphragms of separator (4) The cover gasket is poorly sealed or damaged (5) Whether to use high tank | (1) Overhauling oil floats, correcting position and making it move freely (2) Clean the parallel valve and correct the position (3) Repair damaged or replace separator (4) repair or replace the cover pad (5) At this time, the oil and gas separation fails, and only the outlet pipe can be blocked. |
4 Out of oil with air bubbles | (1) Leakage in separator low pressure chamber (2) Separator exhaust valve plugged (3) External suction pipe leakage (4) The separator outlet valve card is normally open | (1) Check the low pressure chamber and seal ring (2) Cleaning the exhaust valve (3) Check whether the oil inlet pipe, bellows and sealing surface are damaged (4) Repair the outlet valve |
5 flow meter measurement is overdone (can not be adjusted) | (1)Flowmeter connection block wear (2) Breakage of upper and lower connecting rod end type 0 seals (3) The gap between flowmeter plunger and bushing is too large (4) The flow meter plunger screw comes off (5) Serious wear of bakelite wheels (6) The clearance between the piston and the casing is too large | (1) Check the center distance and hole diameter of the connecting block and replace the qualified product (2) Replace O ring (3) Replace the plunger to maintain the clearance (4) Open inspection, reload (5) Replace the bakelite wheel assembly (6) Check the piston and housing assembly, replace or select the matching product |
6 Noisy, high vibration | (1) Breakage of the cover gasket on the separator (2) Tank bottom valve opening is too small (3) Separator filter felt clogging (4) Pump's relief valve stuck or spring too tight (5) Looseness of pump shaft and rotor or severe wear of bearings | (1) Replace the cover pad (2) Cleaning and repairing bottom valve (3) Cleaning filter (4) Repair relief valve (5) Replace the rotor assembly or overhaul the bearing |
7 Tax-controlled fuel dispenser is normal but no data is displayed on the display | (1) The two ends of the rotating shaft of the flowmeter are broken. (2) flow meter turning elbow pin off (3) Loosening of related connection plugs | (1) Reconstituted for 2 sales (2) Reprovision the shaft pin or replace the turning elbow (3) Check the connection plug |
