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[4] CHECKING CHARGE PRESSURE OF NITROGEN GAS IN ACCUMULATOR
The accumulator is charged with high-pressure nitrogen gas, so mistaken operation may cause
an explosion, which will lead to serious injury or damage. When handling the accumulator,
always do as follows.
• The pressure in the hydraulic circuit cannot be completely removed. When removing the
hydraulic equipment, do not stand in the direction that the oil spurts out when carrying out the
operation. In addition, loosen the bolts slowly when carrying out the operation.
• Do not disassemble the accumulator.
• Do not bring it near flame or dispose of it in fire.
• Do not make holes in it or weld it.
• Do not hit it, roll it, or subject it to any impact.
• When disposing of the accumulator, the gas must be released. Please contact us or our sales
service agency to have this work carried out.
[FUNCTION OF ACCUMULATOR]
The accumulator is installed to the position shown in the diagram
on the right.
The accumulator stores the pressure in the control circuit.
Even after the engine is stopped, the control circuit can be
operated, so the following actions are possible.
• If the blade control lever operated in the direction to lower the
blade, it is possible for the blade to go down under its own weight.
• The pressure in the hydraulic circuit can be released.
[CHECKING FUNCTION OF ACCUMULATOR]
Replace the accumulator every 2 years or every 4000 hours,
whichever comes sooner.
Check the nitrogen gas charge pressure as follows.
1. Stop the machine on firm and level ground.
2. Set the blade to the maximum raise and hold the blade at
position.
Carry out the following procedure to lower the blade to the ground within 15 seconds of
stopping the engine. When the engine stops, the pressure in the accumulator gradually goes
down, so inspection can only be carried out immediately after the engine is stopped.
3. Keep the blade at its highest position and then turn the starter
switch to the OFF position and stop the engine.
4. Turn the starter switch to the ON position.
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