Zoomlion QY30V, Manual

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09 - 8 09 - 8
D i a g n o s t i c s D i a g n o s t i c s
9.2. 9.2.4 Intermediat 4 Intermediat e and rear axles e and rear axles
Problem Causes Remedy Problem Causes Remedy
Abnormal noise Abnormal noise
Noise sounds like "si" during accelerating or Noise sounds like "si" during accelerating or
decelerating: meshing clearance of gears too
decelerating: meshing clearance of gears too
small or poorly meshed.
small or poorly meshed.
Adjust Adjust
New gear poorly meshed New gear poorly meshed
Observe after Observe after
breaking-in.
breaking-in.
Noise sounds like "clash" on descending gradients Noise sounds like "clash" on descending gradients
or during changing vehicle speed jerkily. Noise
or during changing vehicle speed jerkily. Noise
fades away or decreases during normal driving:
fades away or decreases during normal driving:
meshing clearance of gears too large.
meshing clearance of gears too large.
Adjust or replace Adjust or replace
gear. gear.
Continuous noise during driving. The higher the Continuous noise during driving. The higher the
speed is, the louder the noise is. But noise fades
speed is, the louder the noise is. But noise fades
away or decreases during sliding: the bearings (on
away or decreases during sliding: the bearings (on
hub, main reducer or differential) wear and loose.
hub, main reducer or differential) wear and loose.
Adjust or replace Adjust or replace
bearing. bearing.
Gear oil level too low or oil viscosity do not meet Gear oil level too low or oil viscosity do not meet
requirements. requirements.
Add oil according Add oil according
to requirements. to requirements.
No noise during straight driving but noise sounds No noise during straight driving but noise sounds
during turning: clearance of bearings on both
during turning: clearance of bearings on both
sides of reducer too large. Differential gear or
sides of reducer too large. Differential gear or
thrust bearing shim wears.
thrust bearing shim wears.
Adjust or replace Adjust or replace
Heat generation Heat generation
Bearing installed too Bearing installed too tightly tightly. Meshing clearance . Meshing clearance
too small. too small.
Adjust Adjust
Oil level too low. Oil level too low.
Fill oil to required Fill oil to required
level.
level.
Lubricant viscosity too Lubricant viscosity too low. low.
Replace with Replace with
required
required
lubricant.
lubricant.
Oil leakage Oil leakage
Oil Oil seal seal invalid. invalid. Replace Replace it it
Axle journal wear. Axle journal wear.
Replace Replace
damaged one.
damaged one.
Oil level too high Oil level too high
Drain oil to Drain oil to
required level.
required level.
Sealing Sealing gasket gasket damaged. damaged. Replace Replace it it
Bolt Bolt loose. loose. Tighten Tighten
Vent Vent cap cap soiled. soiled. Clean Clean