Specifications

56
7. Hydraulic system
Hydraulic
oil pump
Type
Gear pump
Displacement
31.5 ml/r
Control
valve
Type
Two-pool type with relief valve, flow divider
and tilt self-locking valve
Setting
pressure
17.5MPa
Dividing
pressure
7 MPa (2, 2.5t) / 9 MPa (3t) / 10.5 Mpa (3.5t)
Flow rate
11L/min (2t, 2.5t) 13L/min (3t, 3.5t)
Lift
cylinder
Type
Single-action piston type, with cut-off valve
Bore diameter
Ф56
Stroke
1495mm (Only for 3m lift height)
Tilt
cylinder
Type
Double-action piston type
Bore diameter
Ф70
Stroke
167mm
Hydraulic oil amount
42L
7.1 General description
The hydraulic system consists of hydraulic pump, control valve, lift cylinder, tilt
cylinder, and oil pipe-lines etc. The oil tank is installed on the right side of the forklift
truck.
7.2 Hydraulic oil pump (Fig7.1)
The hydraulic oil pump is a gear pump. It is drived directly by the power takeoff
device of the engine. The oil in the oil tank flows to the control valve through the main
pump.
The hydraulic oil pump consists of pump body, a pair of gears, lining plate and
snap rings. The pressure-balance method makes the lining plate press on the side
face of gear owing to outleting oil between the lining plate and pump body. This pump
uses pressure-balance type bearings and a special lubrication method so as to
minimum the gear clearance.
7.3 Control valve & flow divider (Fig7.2)
The control valve (2 spool type) consists of four valve housings, two spool valves,
one relief valve and one flow divider. Four valve housings are assembled together
with three stud bolts and nuts. The tilt spool valve consists of a tilt self-locking valve.