5-10t Internal Combustion Counterbalance Forklift Truck Operation & Maintenance Manual
5.2.3 Energy Accumulator (Refer to Fig 5-4.)
When engine stops work or oil pump has encountered a failure, the energy accumulator may
be used as a special energy source, to meet the braking requirement. The energy accumulator
is in a spring type.
The graphic representation is a non-accumulating status, and the buzzer of warning switch is
under the normally on status.
When brake pedal is operated, and oil pressure has reached more than 3.9MPa, the one-way
valve opens and runs oil towards energy accumulator, to push the piston to move leftward and
compress the combination spring for oil pressure to be created.
At the same time the leftward movement of piston allows the switch control rod in the place
of warning switch to move leftwards under the action of spring pressure, for the switch valve
core to fall in the place where the groove of switch control rod is located, and at this point the
warning switch is under the off status.
Along with the rise in oil pressure of pump, the stroke for leftward movement of piston is
limited by the stop tube in the middle part of combination spring. At this point the energy
accumulator stores up the maximum energy, with an oil pressure of 13MPa, and this value is
controlled by safety valve.
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