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9-5
Trouble symptom
4.Unusual oil pressure
1) Oil pressure is high
2) Oil pressure is low
3) Transmission
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Control valve malfunctioning.
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Cold weather. (high oil viscosity)
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Use of improper oil.
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Gear pump malfunctioning(worn).
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Oil leaks excessively :
(1)Control valve oil spring defective.
(2)Control valve spool defective.
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Air sucked in.
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Low oil level.
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Oil filter clogging.
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Oil leaks excessively.
(1)Check for spool operation.
If necessary, replace valve.
(2)Check for clogging of small hole in
valve body. If necessary, clean or
repair.
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When atmospheric temp is below fr-
eezing point
(when normal oil pressure is recover-
ed if heated to 60 ~ 80
Á
C), change
oil.
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Check and change oil.
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Disassemble, check and replace.
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Check spring tension (see spring sp-
ecification).
If necessary replace.
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Disassemble, check, and repair or re-
place valve.
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Check joints and pipes. If necessary,
retighten joint or replace packing.
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Check oil level and add oil.
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Check and replace.
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Disassemble, check (piston ring and
O-ring for wear and other defects),
and replace.
P
P
robable cause
Remedy
5.Power is not transmitted
1) Torque converter
2) Transmission
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Clutch plate damaged.
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Low oil level.
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Oil pump driving system faulty.
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Shaft broken.
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Lack of oil pressure.
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Low oil level.
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Inching valve and link lever improper-
ly positioned.
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Forward/reverse spool and link lever
improperly positioned.
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Clutch fails to disengage :
(1)Clutch case piston ring defective.
(2)Main shaft plug slipping out.
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Clutch seizing.
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Shaft broken off.
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Clutch drum damaged (spring groove).
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Clutch snap ring broken.
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Check for damage by listening to ab-
normal sounds at a low converter sp-
eed and replace.
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Check oil level and add oil
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Disassemble and check for wear of
pump gear, shaft and spline.
Replace defective parts.
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Check and replace.
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Check oil pump gear for wear and for
oil suction force.
If necessary, replace pump.
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Check oil level and add oil.
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Check measure and adjust.
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Check and adjust.
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Disassemble, check and replace
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Disassemble, check and repair or re-
place
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Check to see whether or not machine
moves even then transmission is in
neutral position. If so, replace.
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Disassemble, check(main shaft, etc.),
and replace.
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Disassemble, check and replace.
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Disassemble, check and repair or re-
place.