Categories | Electric Diesel Fuel Pump |
---|---|
Brand Name: | CNWAGNER |
Model Number: | EP500-0 |
Certification: | CE ROHS |
Place of Origin: | Chongqing China |
MOQ: | 50 pieces/unit |
Price: | 3.42usd to 4.23usd per piece |
Payment Terms: | T/T, Western Union, MoneyGram |
Supply Ability: | 1000pcs per day |
Delivery Time: | 3-25days |
Packaging Details: | neutral packing |
Products name: | Engine Accessories Excavator Engine Parts Eletric Fuel Pump |
OE NO.: | EP500-0 |
Car make: | Excavator |
Application: | for Excavator |
Sample: | Availbable |
Condtion: | new |
Feature: | 12v |
Warranty: | 12 months |
Company Info. |
Chongqing Songyo Auto Parts Co., Ltd. |
Verified Supplier |
View Contact Details |
Product List |
Engine Accessories Excavator Engine Parts Eletric Fuel Pump EP500-0
Products detail
Products name | Engine Accessories Excavator Engine Parts Eletric Fuel Pump |
Part number | EP500-0 |
Car make | Excavator |
Application | for Excavator |
Sample | Availbable |
Condition | new |
Feature | 12v |
Warranty | 12 months |
Structural characteristics of fuel pump
The fuel pump is composed of an electric motor, a pressure limiter,
and a check valve. The electric motor actually works in the fuel in
the oil pump housing. The fuel can lubricate and cool the fuel
motor. Because there is nothing in the housing that can be ignited,
it generally does not produce anything. Danger; the check valve is
installed at the oil outlet, and the pressure limiter is located on
the pressure side of the oil pump housing with a passage leading to
the oil inlet. The ZYB ignition booster fuel pump is suitable for
conveying diesel, heavy oil, residual oil, fuel oil and other
media, especially suitable for the fuel pump of the burner in the
pump of the road and bridge engineering mixing station. It is an
ideal product to replace imported products; similar to ammonia,
Liquids with high volatility or low flash point, such as benzene,
are not suitable for transportation.
Common faults and troubleshooting of fuel pumps
(1) The fuel pump does not rotate
If the electric fuel pump does not work, it means that the fuel
pump or the circuit is faulty, and you can check it according to
the following steps:
a. Check whether the power plug of the fuel pump is loose and
whether the connecting wire is disconnected. The method is: unplug
the fuel pump plug, connect the test light to the two terminals of
the plug, turn on the wire switch, if the test light is on, it
means that the power supply voltage is normal, and the fuel pump is
faulty; if the test light is off, it means the circuit If there is
a fault, it should be searched according to the circuit diagram.
[2]
b. Check the fuse, main relay, power-off relay and their
connections. You can turn off the ignition switch, open the fuse
box cover on the left side of the dashboard, pull out the fuse of
the fuel pump, and connect the wire with a switch to both ends of
the fuse holder. The other end of the wire is connected to the
positive electrode of the battery, and the wire switch is turned on
, Check if you can hear the sound of the fuel pump running. If the
fuel pump still does not rotate, it means that the fuse or relay is
open.
c. If it is normal after the above inspection, but the fuel pump
still does not rotate, it may be a problem with the fuel pump
switch. In the L-type electronically controlled fuel injection
system, the fuel pump switch is located in the air flow meter. In
addition to being controlled by the ignition switch, the electric
fuel pump is also controlled by the air flow meter. Only when the
engine is started and there is air flow in the air flow meter When
the electric fuel pump can work. Therefore, when checking the fuel
pump of the L-type electronically controlled fuel injection system,
the fuel pump check switch in the control circuit should be
pressed. [2]
2. The fuel pump can rotate but does not deliver oil
The main reasons why the fuel pump can rotate but not deliver oil
are:
a. The fuel inlet filter of the fuel pump is blocked. Take out the
fuel pump from the fuel tank and check it. It can be seen that the
three filter screens of the fuel pump are almost blocked by black
powdery impurities. Put it in gasoline to clean it, and then use
compressed air to blow off the filter and oil passages, and then
troubleshoot.
b. The fuel pump check valve is stuck in the closed position, the
fuel inlet is blocked, and the pumped fuel cannot enter the fuel
delivery pipe.
c. The spring of the pressure relief valve (or safety valve) is
broken, the valve is stuck in the open position, and the pumped
fuel flows back to the fuel tank through the pressure relief valve
(or safety valve).
d. The fuel pump impeller and pump casing are severely worn. In
this case, only replace the fuel pump. [2]
3. The pump oil pressure is too low
If the oil pressure is too low, the fuel injection volume of the
injector will be reduced, resulting in difficulty in starting the
engine and a decrease in power. The judgment method is: connect an
oil pressure gauge to the oil circuit to stabilize the engine speed
at 3 000 r/min. If the pointer of the oil pressure gauge swings
rapidly between 220 and 300 kPa, it indicates that the fuel pump
pressure is normal; The pointer of the pressure gauge stops
slightly at a certain position, indicating that the fuel pump has
worn out. You can also use the pressure gauge to test the fuel
supply pressure of the fuel pump by squeezing the fuel return hose
of the fuel pressure regulator with your hands. If the fuel
pressure is still too low at this time, it means that the fuel pump
is not supplying enough. The fuel pump should be replaced if the
pressure relief valve (or safety valve) leaks, the fuel inlet
filter is blocked, the impeller and the pump casing are worn, etc.;
if the fuel pressure can rise to more than 300 kPa after pinching
the return pipe, it means that it is not a fault of the fuel pump ,
The fuel pressure regulator should be checked for damage.
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