METHOD FOR RELEASING PRESSURE IN HYDRAULIC CIRCUIT
WARNING
• The
hydraulic system is always under internal pressure. Before checking or replacing the pipes and
hoses, release the pressure from the circuit. If the internal pressure has not been released, the high
pressurized oil may spout out and it may cause serious personal injury or death.
• Immediately after the engine is stopped, its parts and oil are still very hot and may cause burn in-
jury. Wait for the temperature to go down, and then start the work.
• If the oil filler cap is removed without releasing the internal pressure, oil will spurt out, so turn the
oil filler cap slowly to release the internal pressure, then remove it carefully.
NOTICE
Finish
the steps of operating the blade control lever fully forward and backward, and to the right and left
within 15 seconds after the engine has stopped.
1.
Stop the machine.
Place the machine on a firm, level ground.
2.
Lower the work equipment to the ground and stop the engine.
3.
Turn the starting switch to ON position.
4.
Set the work equipment lock lever to FREE position.
5.
Operate the blade control lever fully forward, backward, to the right, and left to release the pressure from
the hydraulic circuit.
6.
Set the work equipment lock lever to LOCK position.
7.
Loosen oil filler cap (F) slowly on the top of the hydraulic
tank to release the internal pressure in the hydraulic tank.
METHOD FOR BLEEDING AIR FROM FUEL CIRCUIT
This machine is equipped with the fuel feed pump to bleed air from the fuel circuit.
In the following cases, bleed air according to the following procedure.
•
When the fuel filter is replaced.
• When fuel is used up.
• When starting the engine for the first time after the fuel piping or supply pump is replaced or repaired.
METHOD FOR BLEEDING AIR
WARNING
When using the fuel feed pump, do not loosen the air bleeding plug of the fuel circuit. The fuel circuit is
pressurized
while the fuel feed pump is operated. If the air bleeding plug is loosened at this time, fuel
may spurt out and it is dangerous.
MAINTENANCE PROCEDURE MAINTENANCE
4-42
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