Hyundai 20DT-7 - Page 65

3-23
Trouble symptom
Trouble symptom
Probable cause
Probable cause
Remedy
Remedy
2. Oil leakage
2. Oil leakage
1) External leakage
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Excess of oil.
Using different oil.
Blocking air breather.
Damaged of hub oil seal.
Leakage at pinion shaft.
- Excess of oil.
- Using different oil.
- Blocking air breather.
- Worn or maladjustment pinion shaft
oil seal.
Loosened bleeder screw.
Loosened inlet fitting or plugs.
Damaged inlet fitting or plugs or
damaged seats.
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Check oil level. Set of oil amount.
Change oil.
Washing or change air breather.
Disassemble, check and change.
- Check oil level. Set of oil amount.
- Change oil.
- Washing or change air breather.
- Change oil seal.
Tighten bleeder screw to 150~200 kgf·m.
Tighten inlet fitting to 380~420 kgf·m.
Replace inlet fitting or plug and O-ring if
used.
Repair or resurface area; or replace as
necessary.
2) Internal brake
- Fluid bypasses
seals into and fills
axle with fluid and
blows out breather
or emptied brake
fluid reservoir.
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Worn or damaged piston seal.
Melted or extruded piston seals.
Corrosion, pitting wear or other
damage, marks, scratches to piston
and/or brake housing bore in area
seal/sealing lips.
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Replace piston seals.
Correct cause of overheating and replace
seals.
Clean, smooth, rework or replace affected
parts.
3. Axle does not
3. Axle does not
revolution
revolution
1) Axle shaft
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Injured axle shaft.
- Loosened and injured wheel bearing.
- A short shaft.
- Injured disc spline.
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Disassemble and change wheel bearing.
Change axle shaft
Change axle shaft
2) Hub
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Injured axle shaft.
- Injured lock nut.
- Loosened and injured wheel bearing.
- Loosened and damaged bolt
between wheel shaft and hub flange.
Loosened or injured hub bolt and hub
nut.
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- Change lock nut.
- Reassemble or change wheel bearing.
- Reassemble or change bolt.
Reassemble or change hub bolt.
3) Differential
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Damaged diff pinion and side gear.
Damaged diff spider.
Damaged differential case.
Damaged ring gear and pinion gear.
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Change the damaged part.
Change the damaged part.
Change the damaged part.
Change the damaged part.