Hyundai 20DT-7 - Group 2 Troubleshooting

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GROUP 2 TROUBLESHOOTING
GROUP 2 TROUBLESHOOTING
1. TRANSMISSION
1. TRANSMISSION
Trouble symptom
Trouble symptom
Probable cause
Probable cause
Remedy
Remedy
1. Output does not go up
1. Output does not go up
1) Torque converter
- Torque converter oil
- Main body of torque
converter
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The oil is in short supply.
The oil that is not regulated is used.
The air has mixed into oil.
The oil filter is clogging.
The stator free wheel is broken.
The stator free wheel is sticking.
The wheel with blades is broken or it is
touching other components.
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Replenish oil.
Change the oil to regular oil.
Tighten each joint coupling and the pipe
further.
Wash the oil filter or change it.
Change the stall revolution then if the
revolution is extremely low, change the
free wheel inner race, free wheel cam
and roller.
Check the rise of the temperature of oil
at no load.
Change the free wheel inner race, free
wheel cam and roller when the
temperature of oil rises abnormally.
Check whether the aluminum powder
and the like has mixed into torque
converter oil. Change the wheel with
blades if the aluminum powder and the
like has mixed in.
2) Transmission
- Charging pump
- Torque converter oil
- Valve assy
- Clutch
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The pump does not operates normally.
The oil is in short supply.
The oil that is not regulated is used.
The air bubble occurs because the torque
converter pressure decrease.
The water has mixed into oil.
The clutch oil pressure has de-creased,
because the spring is setting or break.
The valve does not move with the valve
opens.
The orifice is clogging.
The seal ring of the clutch piston are
damaged.
The clutch plate slips because the clutch
oil pressure decrease.
The clutch plate is worn out or damaged.
The clutch piston down not operate
normally.
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Change the pump.
Replenish oil.
Change the oil to regular oil.
Check and adjust the torque converter
pressure.
Check the cooler, and change all oil.
Change the spring.
Repair or change the valve.
Wash the orifice.
Change the seal ring.
Measure the clutch pressure.
Change the clutch plate.
Repair or change the clutch piston.