Zoomlion QY30V, Руководство пользователя

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09 - 4 09 - 4
shift gears. shift gears.
Breakage of the shell, excessively large Breakage of the shell, excessively large
tightening torque for locking screw on the tightening torque for locking screw on the
gearshift shaft, causes fork shaft bending and fork gearshift shaft, causes fork shaft bending and fork
shaft surfaces collision. As a result, fork shaft is
shaft surfaces collision. As a result, fork shaft is
engaged into the upper cover shell.
engaged into the upper cover shell.
Replace and Replace and
tighten to required tighten to required
torque
torque
Locking screws on the gearshift shaft loose. Locking screws on the gearshift shaft loose.
Tighten to Tighten to
required torque
required torque
D i a g n o s t i c s D i a g n o s t i c s
Problem Causes Remedy Problem Causes Remedy
Transmission Transmission
temperature
temperature
reaches the
reaches the
upper limit.
upper limit.
Improper lubrication. Oil level is too low or too Improper lubrication. Oil level is too low or too
high or oil brand is incorrect. high or oil brand is incorrect.
Check. Fill oil to Check. Fill oil to
required level. required level.
Replace with Replace with
qualified oil.
qualified oil.
Driving on the ascending gradient over 12° for a Driving on the ascending gradient over 12° for a
long time, or the ambient temperature is too high. long time, or the ambient temperature is too high.
Turn off the Turn off the
engine to lower
engine to lower
the temperature
the temperature
of the engine oil.
of the engine oil.
Driving the vehicle at low speed for a long time. Driving the vehicle at low speed for a long time.
Drive the vehicle Drive the vehicle
at proper speed.
at proper speed.
Engine RPM is excessively high. Engine RPM is excessively high.
Check and adjust Check and adjust
engine control to engine control to
make engine
make engine
RPM fulfill the
RPM fulfill the
requirements.
requirements.
Abnormal noise. Abnormal noise.
Knocking Knocking
sound sound
It is caused by collision of gear It is caused by collision of gear
faces inside the transmission. It faces inside the transmission. It
can be distinguished from bright
can be distinguished from bright
spots appeared after strong
spots appeared after strong
milling of gear face. Knocking
milling of gear face. Knocking
sound will be louder when the
sound will be louder when the
gear bears load. Therefore, if the
gear bears load. Therefore, if the
noise sounds once the gear is
noise sounds once the gear is
engaged, it indicates that the gear
engaged, it indicates that the gear
defects.
defects.
Rubdown Rubdown with with
oilstone or oilstone or
grinding wheel
grinding wheel
If ball or roller of bearing is If ball or roller of bearing is
damaged, pitting appears on the
damaged, pitting appears on the
roller bed, or the roller bed falls
roller bed, or the roller bed falls
off. As a result, noise sounds from
off. As a result, noise sounds from
each gear at low speed.
each gear at low speed.
Replace Replace
If cracks appear after gear is If cracks appear after gear is
cracked by load or during cracked by load or during
assembly
assembly, knocking sound , knocking sound will be will be
heard at low speed and heard at low speed and
screaming will be heard at high
screaming will be heard at high
speed.
speed.
Replace Replace
Abnormal noise Abnormal noise
Whistling Whistling
sound sound
It is caused by normal wear of the It is caused by normal wear of the
gear, including pitting after a long
gear, including pitting after a long
period of operation. Whistling will
period of operation. Whistling will
be heard before it is damaged.
be heard before it is damaged.
Replace Replace
Gear is improperly engaged. It Gear is improperly engaged. It
can be distinguished by uneven
can be distinguished by uneven
wear of gear face.
wear of gear face.
Replace Replace