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Video tags
Subtitles
Russian
00:00:02
unit repair section for my friends and00:00:05
subscribers So the gearbox from the 2018 car00:00:08
mileage is 30 thousand kilometers complaints00:00:11
about the fact that it knocks out the fourth gear in00:00:14
total there will be 3 series 1 series this is00:00:16
diagnostics and troubleshooting the second series00:00:18
This is the cost of repairing the box and the00:00:22
cost of spare parts and the third series00:00:24
Repair and restoration of the gearbox housing00:00:27
So look at all three parts00:00:29
there are small leaks of oil on the00:00:33
rear cover of the central housing and under the00:00:37
gear selection mechanism there is a little00:00:39
sweat Well, in the breather area Well, this is also00:00:43
nonsense,00:00:44
but the main problem we have, of course,00:00:48
lies in this part of the box Now00:00:51
let’s try to take a closer look so00:00:54
I turned the box around more conveniently, added00:00:56
a little light and now we look, the00:00:59
first thing we see is oil drips00:01:02
from under the oil seal of the input shaft of the box, the00:01:05
entire clutch housing is filled with oil.00:01:08
It’s good if it didn’t get on the00:01:10
clutch itself and caused it to slip.00:01:12
Let’s look further. We see that due to some00:01:16
need, someone very generously00:01:19
lubricated the guides of the release00:01:21
bearing, and the lubricant is very similar to00:01:23
fly, such a thick consistency,00:01:25
this cannot be done because over time,00:01:28
dirt, dust gets into the lubricant, the lubricant00:01:31
turns into putty and interferes with the00:01:34
normal movement of a lot of00:01:36
bearings, no one can do this did he00:01:39
do this? Why is he keeping the00:01:40
story silent? Well, a fact is a fact,00:01:43
let’s try to shake the input shaft00:01:45
and see that there is radial play00:01:48
available, but in our case, the00:01:50
radial play is so significant that when00:01:52
rocking the00:01:53
input shaft, with its body it reaches the00:01:57
metal guides of the release00:01:59
bearing; this should not be the case at all.00:02:04
wrong And when I00:02:07
wobble it inside it is asked to check the axial play,00:02:18
but here we are faced with00:02:20
considerable sadness because axial play,00:02:24
which in general should not exist here00:02:25
by the nature of the design,00:02:28
occurs and such a significant one is00:02:31
probably on the order of a millimeter,00:02:36
this could be a subsequent reason or00:02:39
destruction the bearing of the input shaft00:02:41
or the seating hole is sagging,00:02:44
the bearing is in the housing or end00:02:50
to the housing00:02:55
in general00:02:57
axial play is very very bad,00:03:04
we will fix the00:03:08
flange00:03:09
from turning00:03:14
just put a piece of profile pipe, turn on the00:03:21
fourth gear and check the00:03:24
play of engagement of the input shaft with the clutch for00:03:29
shifting 4 3 gears and the hub on the00:03:34
secondary shaft and, accordingly, the play00:03:36
will enter into the secondary shaft.00:03:41
As we can see, there is a play, and it is00:03:45
considerable in terms of the outer diameter of the shaft,00:03:47
it is somewhere around the order of a00:03:49
millimeter,00:03:51
it dangles and inside00:03:56
the situation is such that it is necessary to00:03:58
completely disassemble the box to make defects, then I00:04:01
will see that something broke due to00:04:04
spare parts. Well, we will repair So the00:04:07
next stage we disassemble and let's start00:04:13
Well, in the meantime, the oil is being drained, here is a small00:04:16
installation, here we are a cork00:04:19
and on the cork you can00:04:21
clearly see00:04:23
Serebryanka, and quite a lot and a00:04:28
similar Serebryanka is visible here00:04:31
in this muddy liquid00:04:33
called oil, this is very00:04:35
suspicious and inspires some00:04:39
fear00:04:41
when the unit is disassembled, the00:04:44
box inside blackens a00:04:49
huge amount of black tarry00:04:52
deposits00:04:54
that will then have to be00:04:57
washed for a long time and tediously,00:05:00
now I will disassemble it completely and then we00:05:02
will all work together to defect it,00:05:06
and so friends for a long time,00:05:10
I disassembled it00:05:14
and now I will show you00:05:20
the bearing00:05:23
and turned the mounting hole,00:05:35
by the way, a little about the bearing is a00:05:37
VBF bearing, in principle, of high quality, but00:05:40
it is closed, so the oil00:05:43
gets here little and poorly and as a result,00:05:45
oil starvation occurs, it00:05:49
wears out quickly in this case, most00:05:51
likely this was the reason for the00:05:53
wedging of the00:05:54
further flaring of the seating00:05:57
hole and everything else,00:06:00
since the outer race of the bearing was00:06:02
turned with its seat In this place00:06:06
here you can clearly see the straight00:06:09
polished surface. Radial,00:06:13
I’ll try to focus on00:06:17
these are traces from the rotation of the outer race of00:06:20
the bearing relative to the ring that00:06:23
presses the00:06:27
outer race of the bearing through the thrust ring through the00:06:30
thrust ring to the gearbox housing through the clutch housing,00:06:35
and if you look at the thrust ring itself, you00:06:39
can see that it’s black the background is something that did00:06:42
n’t slide. But the polished white00:06:45
strip is exactly the place that00:06:48
turned and slid along the body of00:06:52
the box.00:06:54
This happened something like this, of00:06:56
course it shouldn’t happen and,00:06:59
accordingly, the thrust washers have a00:07:03
groove with a side00:07:06
you can feel on both sides that has00:07:10
rubbed the outer wallpaper bearing in this00:07:12
thrust ring on the other side00:07:19
[music]00:07:31
periodically rotated00:07:33
relative to the bearing guide00:07:36
through which the bearing is pressed,00:07:41
periodically the following happened: the00:07:43
hermit rotates in the housing,00:07:45
then at the same time it rotates00:07:49
either relatively thrust washers or The00:07:52
thrust washer00:07:55
rotates00:07:59
relative to the release00:08:02
bearing guide due to the bearing. This is this piece of iron in00:08:05
which there is an oil seal, these are just00:08:07
the guides of the release bearing.00:08:10
Here it is, the water is removable, it can be00:08:12
pressed out, changed if necessary, in00:08:15
conjunction with the play of the00:08:18
inner side of both bearings. Which can be directly00:08:21
felt very strongly on the camera. It is00:08:24
most likely not visible, but if00:08:25
you shake it, there is a lot of00:08:26
play and even at00:08:29
kinks lifts and plays along its axis00:08:33
along its axis, the play is very00:08:36
noticeable, downright impressive, I would say As00:08:38
a result, our input shaft received00:08:42
both axial play, so it got00:08:45
such an ideal play inside the box00:08:49
what this led to, this led to the fact00:08:51
that in the coupling which engages fourth00:08:54
gear, the shaft moved like00:09:00
this00:09:02
and In addition,00:09:09
wear and damage to the spline00:09:12
joint in the00:09:14
input shaft And00:09:16
how is this expressed00:09:19
at the top of the spline tooth there is such a00:09:24
sharp ridge and in normal00:09:27
condition it is just so even00:09:29
here in that00:09:31
position in which the gear was knocked out.00:09:32
This is the comb, it is slightly shifted00:09:36
here in this direction and on the side of the tooth00:09:39
that came out of gear, which was00:09:41
knocked out on the side of the slot there is, as it were, a00:09:44
small one like this, smoothing out the00:09:46
sharp edge. The problem is that if you don’t00:09:49
know the symptoms, if you know the history of00:09:51
the box is not obvious, you can00:09:56
miss it and say yes. Well, the normal00:09:58
input shaft, what else will go there, has been00:10:00
assembled and it continues to drink, that’s where00:10:05
the dangers lie, and a similar00:10:07
situation with the clutch. When I took it apart, I00:10:10
specially marked it. I made the00:10:13
side that faces six00:10:16
primary, that is,00:10:19
and on this side of the tooth there is a similar00:10:23
situation, the tip is slightly shifted to the00:10:26
side, apparently there was a slight deformation00:10:28
and00:10:29
sharpness of these here Granik, it is00:10:32
a little smoothed out, this00:10:34
microscopic change is enough so00:10:35
that when the thrust vector changes when00:10:38
moving in 4th gear, the gear is knocked out.00:10:41
there you turned it on, pressed the GAZ, it seemed like00:10:44
it went a little bit, threw everything up, it was knocked out00:10:46
such a mechanics of the process, then00:10:51
this is the shift fork 3 4 gears from the00:10:56
4th gear side, it is clear that when00:11:00
the clutch engaged00:11:03
[music]00:11:08
such vibrations occurred, the00:11:10
clutch00:11:13
and fork touched unnecessarily and the fork is wearing you out,00:11:18
I also want to note that the fork does00:11:20
not hold the gear engaged,00:11:24
how does this happen? We applied the clutch00:11:28
to the gear with the fork, the00:11:31
splines engaged further and further, the fork is00:11:35
not involved in the process, it00:11:36
is fixed with a ball on the rod, it00:11:38
dangles somewhere00:11:40
in the middle of the coupling cut and it does not00:11:43
press it does not hold the gear; the00:11:45
gear is engaged; it is held solely00:11:48
by the engagement of the splines on the gear00:11:52
and on the gear clutch.00:11:56
Thus, we have had premature and00:11:58
quite significant wear of the fork on the00:12:01
fourth gear side; on the00:12:03
third gear side, it is completely new without00:12:05
wear and without anything;00:12:08
now we move on to the intermediate shaft00:12:12
this is a gear, it responds to the00:12:16
input shaft gear, it is in a00:12:19
pair.00:12:20
What happened to the intermediate shaft, the00:12:23
situation there seems to be similar in some cases. Here it is a00:12:27
double-row bearing, we see that it is00:12:29
disassembled,00:12:30
and the following happened: the00:12:34
double-row front bearing on the00:12:37
intermediate shaft also turned, but00:12:40
look, it is assembled; the inner00:12:42
race consists of two halves, here is00:12:44
the front half, here is the rear half,00:12:46
and in this case, the bearing turned with the00:12:50
rear half of the inner race on the00:12:54
shaft in the process of dismantling the00:12:58
intermediate shaft, I00:13:00
could not remove this half because it00:13:02
was turning for a long00:13:05
time, it knurled00:13:07
here here the00:13:08
Roller from metal on the shaft and it is not possible to remove it,00:13:13
it can00:13:14
only be cut off with a grinder.00:13:16
Well, accordingly, during00:13:19
disassembly I figured it out and managed to00:13:22
pull it out of the gearbox housing.00:13:26
Now there’s one more thing because the00:13:30
fourth gear gear during00:13:33
its operation has absolutely such movements,00:13:35
but the contacts of special gears are broken and00:13:40
as a result, the gears mutually ate00:13:43
each other00:13:49
just00:13:52
further. Here's the sound, let's move up here, let's move up,00:13:55
and quite strongly, and a00:13:58
similar situation occurs on the00:14:00
input shaft, here's the tooth coming up, here's00:14:03
the tooth coming up,00:14:06
here it's coming up too.00:14:09
Well, it's clear. This all happened because the00:14:12
chaotic teeth00:14:15
changed the angle of inclination even if it is a small00:14:18
degree and relative position, but00:14:20
nevertheless it was enough for the teeth00:14:22
on the gears to eat up.00:14:25
Now00:14:27
the following results are an examination of00:14:28
the box, we have an00:14:32
intermediate bearing,00:14:37
from here you can00:14:41
clearly see that it is quite00:14:43
worn, the00:14:45
inner wallpaper is worn out, the outer one is also worn,00:14:47
and you can see a large number of small00:14:50
shells. even visually visible this00:14:53
should not be the bearing is already00:14:55
out of order00:14:59
so a similar situation with the bearing00:15:04
on the rear secondary shaft wear of the00:15:09
working track is00:15:11
visually observed it is quite00:15:12
high there are small caverns it also00:15:16
cannot be used the00:15:18
third roller bearing the rear00:15:21
bearing the00:15:23
inner race from the rear bearing of the00:15:25
fifth block rear gear,00:15:28
the situation is absolutely similar. They are all in00:15:31
the same condition, they all need to be changed.00:15:33
Thus, of the entire set of00:15:36
bearings, the one that remains more or less alive00:15:38
is the00:15:39
ball bearing of the secondary shaft. Well,00:15:42
accordingly, there is no point in leaving one00:15:44
bearing while replacing all the others with new ones,00:15:47
so the00:15:48
entire set of bearings goes under00:15:51
replacement Well, what else I discovered is that the00:15:56
file of this gear is also very00:15:58
large, more than a millimeter, also a replacement.00:16:01
Although the condition of the fifth gear unit is00:16:04
quite satisfactory and does00:16:06
not require additional interventions,00:16:08
so we summarize due to the fact00:16:12
that our input shaft bearing has failed and00:16:17
broken mounting hole in the00:16:19
gearbox housing and at the same time, the00:16:23
inner half of the rear00:16:26
half of the inner race jammed the double-row00:16:29
front intermediate shaft bearing,00:16:32
we got the following: the00:16:33
input shaft has failed, plus the00:16:37
teeth on the input shaft itself and00:16:41
on the counter gear of the secondary shaft have eaten up,00:16:43
plus the secondary shaft is damaged due to the fact that the00:16:47
rear half of the double-row bearing has00:16:50
been knurled on itself. The roller does not want to be cut off,00:16:52
even if it is cut off, it00:16:54
will still sag in the same place. The landing is00:16:56
further. All bearings are for replacement; in general,00:17:00
everything is for replacement;00:17:05
and for replacement, the thrust ring of the00:17:07
input shaft bearing is00:17:09
such a set of spare parts; we will00:17:13
change in short the shaft, coupling, intermediate00:17:19
shaft Two forks, all bearings00:17:22
and a thrust ring.00:17:23
So see the second part about the00:17:27
cost of spare partsDescription:
Почему выбивает четвертую передачу? В этом видео подробный разбор проблемы, почему происходит, к чему приводит и как это исправить. Коробка передач ВАЗ классика, Нива - частая проблема... Диагностика, дефектовка, как устранить и починить. Подписывайтесь на мой Telegram канал: https://t.me/bolgarkasvarkamolotok57 ________________________________________________ Если вам понравилось видео и оно было полезным, то по желанию можно финансово поддержать канал по ссылкам: https://www.donationalerts.com/r/bolgarka_svarka https://www.tinkoff.ru/rm/komarova.evgeniya27/YeHid84741/
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