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XE210C Hydraulic Excavator
supercharger may be damaged.
d)
Pull the safety locking rod to LOCK (lock).
e)
Open the drain ball valve in the bottom of fuel tank for several seconds to discharge the water and
deposits, and then close the ball valve.
Check of water separator
Check the water separator before the operation every day.
The water separator may mix the water in fuel. The water separator
contains a floating body that will float up during the accumulation of
water to ensure the water separator starts to drain when the floating
body reaches the mark of " Drain water "on outer side of oil-water
separator.
Important: if the fuel contains excessive water, shorten the check
interval of water separator.
Drain steps
a)
The water separator is located on fuel prefilter near to the hydraulic pump, open the right side shed
door, and fix the door with a fixing bar.
b)
Close the fuel ball valve (Fig.2-35) in the bottom of fuel tank to stop the supply of fuel.
c)
Loosen the air bleed plug on top of fuel prefilter, and anticlockwise loosen the drain plug in the
bottom of water separator to drain the water accumulated in water separator.
d)
After draining the water, tighten the air bleed plug and drain plug. Turn the fuel ball valve to its
original position.
e)
Start the engine, and check whether there is leakage or not of the plug and air bleed plug.
Note: ensure that the air is bleed out of the hydraulic system after drawing the water.
Bleed the water out of hydraulic system.
Important: the air in fuel system may cause the starting difficulty or abnormal starting of
engine. After draining the water and deposits in oil-water separator, replacing the fuel filter or
drying the fuel tank, ensure the air must be bleed out of hydraulic system.
a)
Determine that the drain plug and air drain plug of oil-water separator are tightened. If the air bleed
plug is not tightened, the air in hydraulic system won't be exhausted.
b)
Ensure the fuel ball valve in the bottom of fuel tank has been opened.
c)
Loosen the air bleed plug on the fuel filter.
d)
Loosen the hand wheel on fuel supply pump, and move the plunger up and down until no air bubbles
are seen from the air bleed plug.
e)
Tighten the air bleed plug, and
continue to
fuel supply pump up and down until
the load becomes heavier.
f)
Push down the hand wheel of fuel
supply pump, and tighten it.
g)
Start the engine, and run it at low
speed and empty load.
move the plunger of
Operating and Maintenance Manual 119
Fig. 2-37
1－Air bleed plug
2－Fuel supply pump
Fig. 2-36
1－Air bleed plug
2－plug
3－Fuel prefilter
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