9-3
3. TORQUE FLOW SYSTEM
3. TORQUE FLOW SYSTEM
Trouble symptom
Trouble symptom
Probable cause
Probable cause
Remedy
Remedy
1. Excessive oil
1. Excessive oil
temperature rise
temperature rise
1) Torque converter
· Improper oil level.
· Check oil level. Add or drain oil as necessary.
· Impeller interfering with
surroundings.
· After draining oil from oil tank and transmission,
check and replace interfering parts.
· Stator and free wheel
malfunctioning.
· Check engine (stalling) speed.
If necessary, replace.
· Air sucked in.
· Check the inlet side joint or pipe.
If necessary, retighten joint or replace gasket.
· Water intruding into transmission
case.
· Check drained oil.
If necessary, change oil.
· Bearing worn or seizing.
· Disassemble, inspect, repair or replace.
· Gauge malfunctioning.
· Check and, if necessary, replace.
2) Transmission
· Clutch dragging.
· Check to see whether or not machine moves
even when transmission is placed in neutral
position. If so, replace clutch plate.
· Bearing worn or seized.
· Disassemble, check and replace.
2. Noise operation
2. Noise operation
1) Torque converter
· Cavitation produced.
· Change oil, replace parts leaking air.
· Flexible plate damaged.
· Listen to rotating sound at lowspeed operation.
If necessary, replace flexible plate.
· Bearing damaged or worn.
· Disassemble, check and replace.
· Gear damaged.
· Disassemble, check and replace.
· Impeller interfering with
surroundings.
· Check impeller or check drained oil for mixing
of foreign matter.
If necessary, change oil.
· Bolt loosening.
· Disassemble and check. If necessary,
retighten or replace.
· Spline worn.
· Disassemble, check and replace.
· Noise gear pump operation.
· Disassemble, check and replace.
2) Transmission
· Dragging caused by seizing
clutch.
· Check to see whether or not machine moves
even when transmission is in neutral position.
If so, replace clutch plate.
· Bearing worn or seizing.
· Disassemble, check and replace
· Gear damaged.
· Disassemble, check and replace
· Bolt loosening.
· Disassemble, check and retighten or replace
· Spline worn.
· Disassemble, check and replace