capacitor voltage is lower than
20% of the rated voltage within
the specified time, this fault will
occur
2. It may be that PTC or
charging resistance is
disconnected, or there is a
problem in the controller, and
the controller needs to be
replaced
The temperature of the controller
is higher than 85 °c (the
temperature of the controller is
between 85 °c and 105 °c, and
the maximum current is reduced
proportionally; when 105 °c, the
current is 0).
Stop working and let the
controller cool down. Check if
the controller fan is working
properly.
NOTE:
1. The truck will travel with default mode (E) when three kinds of travelling
mode (P/E/S) are or are not input at the same time.
2. When turn signal device is invalid, the truck will travel with limited speed.
5 Hydraulic System
5.1 General Description
The hydraulic system consists of oil pump, control valve, priority valve, lift cylinder,
tilt cylinder, high & low pressure oil pipe an joint etc. The pump is driven directly by the
electromotor. The hydraulic oil flow to control valve through the pump and are distribute
to cylinders by the control valve.
5.1.1 Oil pump
The main parts of the gear oil pump for forklift are a pair of external gears mutually
meshed and their working principle is as shown in Fig. 5-1.
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