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Revision Number-001 01-01-2020 - Present
17
SERVICE & MAINTENANCE
THE HYDRAULIC LIFTING SYSTEM
Each lever controls one hydraulic system only. The position of the control lever, distribution of hydraulic line
will control the different speeds. With the manipulating lever activated, the supplementary dynamoelectric
switch activates the oil pump motor which starts to turn synchronously, to export the hydraulic oil, and allows
movement of the related hydraulic parts. In order to ensure the pressure safety of the hydraulic system, the
pressure overflow device is installed on the hydraulic valve. Once the pressure exceeds the safety value, the
pressure overflow valve will overflow to unload automatically
Notice: Do not adjust the pressure unit on the hydraulic valve at your discretion.
The Lifting System
The lifting unit consists of a fixed upright and a mobile upright for the dynamoelectric counterweight Forklift
of series of CPD-F type. The mobile upright can move up and down by means of stretching and shrinking the
cylinder. The high strength forged steel forks slides on the mobile upright by means of the traction of the high
tensile strength chain to load and unload the goods safely. (Fig.4)
The Hydraulic Cylinders
The dynamoelectric counterweight Forklift of series of CPD-F type has common type and standard type. The
common type is fitted with two lift cylinders outside the fixed upright while the standard type is additionally
equipped with a third central cylinder that can be used inside the container. All cylinders are plunger type
cylinders.
There is a double acting plunger type cylinders that is used to tilt the uprights in the bottom of the uprights.
The Forklift is also equipped with a safety valve in the hydraulic circuit of the lift cylinder to slow the downward
speed of the mobile upright that ensures the safety downward movement.
There is a one-way throttle valve at the rear of oil exit of the tilt cylinder. With the appropriate regulating it can
choose the tilt speed.
Fig.4 - The Hydraulic Lifting System
1. The fixed upright
2. The mobile upright
3. The forks holder plate
4. The lift cylinders
5. The central cylinder
6. The lifting chains
