Mainshaft Assembly - Datsun 620 Series 1977 Service Manual

4
Remove snap
ring
and then thrust
washer from mainshaft
front end
Draw
out
3rd
4th
synchronizer
assembly
and
remove
3rd
gear
as
sembly
5 Release
caulking
on
mainshaft
nut
and
loosen
it
See Figure
MT 19
TM346
Fig
MT 19
Removing maimhaft
nut
6
Remove
mainshaft
nut
thrust
washer and mainshaft
reverse gear
7 Remove snap
ring
from
counter
shaft
rear
end
and
remove
reverse
idler
gear
8 Draw
out
mainshaft
gear
as
Manual Transmission
sembly together
with countershaft
by
lightly tapping
the
rear
end with
a
soft
hammer while holding
the front of
mainshaft gear assembly by hand
Be
careful
not to
drop off
gear
shaft See Figure MT 20
IJ
t
I
TM347
Fig MT 20
Driving
out
gear
Cl
embly
Mainshaft
assembly
1 Remove thrust washer steel ball
I st gear and needle
bearing
Be careful
not to
lose steel ball
retaining
thrust
washer
12
2 Press out I
st gear
mainshaft
bush
ing together with 2nd
gear
and 1 st
2nd speed synchronizer using Bearing
Puller STJ0031000 See
Figure
MT 2l
Note When
r
out bushing
hold
h
ft by hand
so as
not to
drop
it
H
S1 30031000
TM049A
Fig MT 21 R moving lIt gear
mtUlIIhaft bu hing
1 Pilot bearing
2 3rd 4th synchronizer
assembly
3
Baulk
ring
4
3rd main gear
5
Needle
bearing
6 Mainshaft
7
Needle
bearing
8
2nd
main gear
9 1st
2nd
synchroni
r
assembly
to
Coupling
sleeve
II
Shifting
insert
12
Shifting
insert
spring
13
Synchronizer
hub
14 1st main gear
15 Needle
bearing
16 1st gear
bushing
17
Thrust weher
18
Maimhaft bearing
19 ReftllSe main gear
20 Thrust washer
21 Nut
22 Steel ball
23 Thrust washer
24
Snap ring
TM348
Fig MT 22
Explod
d view
of
main haft
mbly
MT 6