Hyundai 20G-7, Руководство по обслуживанию

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3-23
Trouble symptom
4. Unusual oil pressure
1) Oil pressure is high
2) Oil pressure is low
3) Transmission
· Control valve malfunctioning.
· Cold weather. (high oil viscosity)
· Use of improper oil.
· Gear pump malfunctioning(worn).
· Oil leaks excessively :
(1)Control valve oil spring defective.
(2)Control valve spool defective.
· Air sucked in.
· Low oil level.
· Oil filter clogging.
· 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.
· When atmospheric temp is below fr-
eezing point
(when normal oil pressure is recover-
ed if heated to 60 ~ 80
。 C), change
oil.
· Check and change oil.
· Disassemble, check and replace.
· Check spring tension (see spring sp-
ecification).
If necessary replace.
· Disassemble, check, and repair or re-
place valve.
· Check joints and pipes. If necessary,
retighten joint or replace packing.
· Check oil level and add oil.
· Check and replace.
· Disassemble, check (piston ring and
O-ring for wear and other defects),
and replace.
P Probable cause Remedy
5. Power is not transmitted
1) Torque converter
2) Transmission
·
Clutch plate damaged.
·
Low oil level.
·
Oil pump driving system faulty.
·
Shaft broken.
·
Lack of oil pressure.
·
Low oil level.
·
Inching valve and link lever improper-
ly positioned.
·
Forward/reverse spool and link lever
improperly positioned.
·
Clutch fails to disengage :
(1)Clutch case piston ring defective.
(2)Main shaft plug slipping out.
·
Clutch seizing.
·
Shaft broken off.
·
Clutch drum damaged (spring groove).
·
Clutch snap ring broken.
·
Check for damage by listening to ab-
normal sounds at a low converter sp-
eed and replace.
·
Check oil level and add oil.
·
Disassemble and check for wear of
pump gear, shaft and spline.
Replace defective parts.
·
Check and replace.
·
Check oil pump gear for wear and for
oil suction force.
If necessary, replace pump.
·
Check oil level and add oil.
·
Check measure and adjust.
·
Check and adjust.
·
Disassemble, check and replace.
·
Disassemble, check and repair or re-
place.
·
Check to see whether or not machine
moves even then transmission is in
neutral position. If so, replace.
·
Disassemble, check(main shaft, etc.),
and replace.
·
Disassemble, check and replace.
·
Disassemble, check and repair or re-
place.