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cavity, 2 is oil pressing cavity and they are separated by meshing point of two gears. With
constant rotation of gear, the suction and discharge outlets of the pump continuously
absorb and drain oil.
Oil pump is to turn the mechanical energy of motor into hydraulic energy, so the oil
pump is the actuating unit of hydraulic system of the forklift.
The main pump consists mainly of a pump body, a pair of gears, lining plates and oil
seals. This pump uses pressure-balance type bearings and a special lubrication method so
as to minimum the clearance of the gear face. (See Fig. 5-2)
Fig. 5-2 Gear pump
(1) Pump body (2) Driving gear (3) Driven gear (4) Front cover (5) Rear cover
(6) Lining plate (7) Seal ring (8) Ring (9) Oil seal (10) Snap ring
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