VDL Futura FHD2 E6, Руководство по ремонту

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Futura FHD2/FMD2 E6
DIAGNOSIS
Components
3 - 10
2
DD1020_01
The piston rings are worn
Piston ring groove enlarged
Piston barrel enlarged around piston pin hole
The piston has grooves in it
Check the cylinder lining for signs of wear.
Possible cause Remedy
Poor lubrication of the cylinder as a result of fuel in the
lubrication oil. Check the fuel system.
Poor lubrication of the cylinder as a result of coolant in
the lubrication oil. Check the cooling system.
The intake air is contaminated. Check the intake system.
The piston rings are stuck in the groove. Check the size.
Possible cause Remedy
The piston ring is broken.
When the ring was fitted, it was bent open too much, so
that a hairline crack was produced. Check the other piston rings.
The intake air is contaminated, so the piston rings are
excessively worn. Check the entire air intake system.
Damage caused by the piston pin lock spring (or springs) that has (or have) been driven out.
Possible cause Remedy
The lock spring for the piston pin is broken or has been
fitted incorrectly.
The piston rod has been bent. Check whether the piston rod is straight.
Excessive play on the piston pin, piston pin hole in the
piston, the piston pin eye or the piston rod bearings. Check the piston rod bearings.
Mainly around the piston pin holes.
Possible cause Remedy
Excessive heating of the cylinder due to a lack of cool-
ant. Check the cooling system.
There are air bubbles in the cooling system. Check the bleeding system.
Mainly on the delivery side of the piston.
Possible cause Remedy
The piston barrel has been cracked at the piston pin
holes due to overheating. Check the cooling system.
Slight grooves on the delivery side of the piston.
Possible cause Remedy
The piston is not sufficiently cooled/lubricated, since a
cold engine has been brought to a high speed too
quickly. Check the cooling system.