About forklift fuel pumps, structure and working principle, if you do not know understand of this part of the knowledge, I will share with you at Gzsycc.com.

1、The role of forklift fuel pump：gasoline is drawn from the oil tank,which after pressure sent to the carburetor float chamber.

2、Forklift fuel pump structure:For the mechanical drive diaphragm,mounted one side of the engine crankcase,driven by the camshaft eccentric wheel.The pump body is divided into the upper body and the lower body, and the upper body is provided with an oil inlet valve and an oil outlet valve which are die-casted by the zinc alloy.The cover and the upper body are clamped with a gasket at the joint surface,so that the oil-out chamber is sealed.Coated with oil-resistant rubber cloth membrane, with a screw clamp between the upper body and lower body,above the formation of pump oil chamber.Diaphragm and retaining plate with a nut locked in the upper end of the rod, and by the role of the diaphragm spring arch upward,under the spring seat have grease seal, prevent rupture of diaphragm to leak oil.One end of the inner rocker arm is inserted into the square hole of the pull rod, and the other side is in contact with the outer rocker arm ramp,and set sleeved on the rocker arm.Rocker arm shaft one end of with hand rocker arm use of manual pump oil.

3、Forklift fuel pump working principle:When the engine is running, when the convex tip of the eccentric wheel pushes the outer rocking arm to swing,it drives the inner rocker arm and descends the diaphragm through the pull rod,So the pump chamber volume increases,the hydraulic pressure drops,the oil valve is closed, the inlet valve is sucked open,oil enters the pump chamber from the inlet pipe.When the convex tip of the eccentric wheel leaves the outer rocker arm,the outer rocker arm is returned under the action of a return spring,inner rocker arm drive away from the outer rocker arm,diaphragm up under the action of the spring arched upward,So the pump chamber volume decreases,the hydraulic pressure rises, close the inlet valve,push out the valve,the gasoline through the tubing into the carburetor.When not needed,because the float chamber needle valve closed,the oil Internal resistance of the oil chamber exceeds the spring force of the diaphragm spring,the diaphragm down to the lowest position,the pump oil will stop completely.Before starting the engine,if it is found that there is no oil in the float chamber or there is too little oil in the chamber,you can pull the arm pump oil.When the float chamber is filled with gasoline,hand arm will form air movement, pump oil stop.

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