Geely Diagnosis Flow. Manual part — 53

209

Fill up accordingly

Tighten the torque

accordingly

Buzz sound during driving at high speed

Transmission oil viscosity, quantity

Tightening torque at connection of

transmission lever

Meshing mark of differential gear ring
and output shaft, and differential
bearing abrasion

Transmission cone bearing adjustment

Transmission synchronizer, hub, cover,

slide block

Adjust according to

standard gap

Adjust or repair

Repaiar or replace

Normal

Abnormal

Abnormal

Abnormal

Abnormal

Abnormal

Normal

Normal

Normal

210

No.156 Transmission with abnormal sound while shifting

Malfunction

Causes

Solution

Clutch tie-line malfunction

Clutch tie-line (improved version) having too small bending; while
shifting, clutch sound introduced to cab via tie-line; replace old
version of clutch tie-line;

Check tightening torque at connections
of gear shifting lever and transmission is
too tightening, and rubber cover is not
isolating vibration, making sound
introduced to cab;

Tighten connections of gear shifting lever and transmission
according to standard torque;

Synchronizer gear ring, hub, cover
excessively worn or clearance
incorrectly

Toothed ring of synchronizer is excessively worn. Clearance on

①
the gear pressed by synchronizer ring is no less than 0.5mm.
Specified value is between 0.85-1.45. Area of joint face of fifth-gear
synchronizing ring and gear shall be larger than 80%; if lower,
replace synchronizing ring;

②

Check fit clearance of hub, cover, which shall be no obvious

clearance while shaking from left to right. Hub shall be assembled
within the cover freely. Joint part of cover and gear shall be
triangular. Replace synchronizer assembly if damaged, worn, or its
edge angle turning round;

Check height of slide block of synchronizer; if less than 5mm,

③
replace slide block;

Transmission
with abnormal
sound while
shifting

Transmission inner malfunction

Transmission input, output shaft bearing, gear severely worn, or
long-term impact causing burr at meshing of gear; replace damaged
parts;

211

No. 157 Transmission gear disorder

Malfunction Causes

Solution

Lock frame, pin of interlocks deformed or
severely worn.

Replace interlock ball, pin and spring of
transmission

Lower end of gear lever (automotive) is not
sufficient in length, and working face of
lower end greatly worn or fork, guide block
greatly deformed, worn.

Replace shift operation mechanism

When clutch not fully separated, put
into gear at start or shifting during
driving; not switched to the gear
needed; unable to return to neutral
position after put into gear; put into
two gears while vehicle is static.

Location pin of gear lever ball head worn,
loosening broken, or ball head, hole greatly
worn.

Replace gear lever assembly

Transmission with abnormal sound while

shifting

Check clutch tie-line

Check tightening torque at connection of

transmission lever

Check transmission synchronizer gear ring, hub, cover, slide block

Check transmission gear, shaft and bearing, etc.

Tighten

accordingly

Replace tie-line

Replace damaged

parts

Replace

Abnormal

Normal

Normal

Normal

Abnormal

Abnormal

Abnormal

212

Gear disorder

Try to put into gear but

cannot or try to shift down

but cannot?

Put into two gears at
the same time?

No

Malfunction caused
as shifting swing
lever falls out from
fork groove, such as
severely worn lever
or groove

Malfunction caused by
damaged locking
device, such as
severely deformed,
worn lock pin, frame

Interlocjing

Put into different gear. Hold gear lever
with hands and shake around. Check
swing angle of gear lever (automotive)

Swing or not

But swinging angle of
gear lever exceeds
normal range

Malfunction caused by
broken or leaked
location pin

Malfunction caused by
loosening mating of location
pin and slot or severe abrasion
of ball head and seat

End

Yes

No

No

Yes

Yes

No