Zoomlion QY30V, Manual

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09 - 5 09 - 5
Abnormal noise Abnormal noise
Roaring Roaring
sound sound
It is caused by “gears matching” It is caused by “gears matching”
error error. Roaring sound . Roaring sound will be heard will be heard
when “gears matching” of the when “gears matching” of the
transmission is incorrect during
transmission is incorrect during
re-assembly or when gears rotate
re-assembly or when gears rotate
on the auxiliary shaft.
on the auxiliary shaft.
Check and adjust Check and adjust
Sound Sound Sound Sound sounds sounds like like “Click-clack” “Click-clack” Check, Check, adjust adjust or or
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
sounds like sounds like
“Click-clack” “Click-clack”
will be heard if the axial clearance will be heard if the axial clearance
between bearings of auxiliary between bearings of auxiliary
shaft and main shaft is shaft and main shaft is
excessively large or when torque
excessively large or when torque
is changing its direction. Enlarged
is changing its direction. Enlarged
center distance of shaft, which
center distance of shaft, which
caused by excessively large radial
caused by excessively large radial
clearance of auxiliary shaft
clearance of auxiliary shaft
bearing, will bring the load acting
bearing, will bring the load acting
on gear top and breakage of gear
on gear top and breakage of gear
teeth.
teeth.
replace replace
Engine cannot Engine cannot
be switched on.
be switched on.
No power supply in the complete vehicle. No power supply in the complete vehicle.
Check power Check power
supply and rectify
supply and rectify
Neutral switch is not energized. Neutral switch is not energized.
Check Check
corresponding
corresponding
lines and rectify
lines and rectify
Control pin of neutral switch is seized or the Control pin of neutral switch is seized or the
switch is on / off all the time.
switch is on / off all the time.
Replace Replace
corresponding
corresponding
parts
parts
Reverse gear, Reverse gear,
gradient
gradient
–climbing gear –climbing gear
or gears 7 and 8 or gears 7 and 8
cannot be
cannot be
engaged.
engaged.
Range selector is not properly adjusted. Range selector is not properly adjusted.
Range selector cannot be in position of reverse
Range selector cannot be in position of reverse
gear, hill-climbing gear or gears 7 and 8 due to
gear, hill-climbing gear or gears 7 and 8 due to
improper adjustment.
improper adjustment.
Check and adjust Check and adjust
Inner chamber of single-H valve of transmission is Inner chamber of single-H valve of transmission is
interfered.
interfered.
Check, rectify or Check, rectify or
replace
replace
Gears are not Gears are not
clear and cannot
clear and cannot
be changed
be changed
directly. The
directly. The
neutral position
neutral position
is not correct. is not correct.
Range Range selector selector is is interfered. interfered. Check Check and and adjust adjust
Fork shaft for gear1/2 and guide block for gear Fork shaft for gear1/2 and guide block for gear
1/2 of transmission, or fork shaft for gear 3/4 and 1/2 of transmission, or fork shaft for gear 3/4 and
guide block for gear3/4 of transmission defect.
guide block for gear3/4 of transmission defect.
Replace Replace
damaged parts
damaged parts
Reverse gear Reverse gear
speed cannot be
speed cannot be
changed by
changed by
changeover
changeover
switch for high /
switch for high /
low gear range.
low gear range.
Contactor of single-H valve is seriously worn, Contactor of single-H valve is seriously worn,
causing high gears invalid.
causing high gears invalid.
Replace or rectify Replace or rectify
Contactor of single-H valve is retracted and Contactor of single-H valve is retracted and
seized, causing low gears invalid.
seized, causing low gears invalid.
Replace or rectify Replace or rectify
Inside of single-H valve of transmission is Inside of single-H valve of transmission is
improperly adjusted or worn.
improperly adjusted or worn.
Dismantle Dismantle
single-H valve
single-H valve
and changeover
and changeover
manually
manually. If it . If it is is
normal, remove normal, remove
gasket of the
gasket of the
valve and then
valve and then
install to try again.
install to try again.