Page 2137 of 2267

IMeasure the movement (play, dimension ªLº) of 3rd & 4th cou-
pling sleeve with their end fixed and the other end lifted as
shown in the figure. If the movement exceeds specification,
replace the sleeve.
Coupling sleeve Length ªLº
3rd & 4th0 - 0.95 mm (0 - 0.0374 in)
IMeasure clearance between baulk ring and gear.
Clearance between baulk ring and gear:
Refer to SDS, MT-90.
BearingNCMT0011S03
IMake sure bearings roll freely and are free from noise, cracks,
pitting or wear.
ASSEMBLYNCMT0012
1. Press on input shaft front bearing.
2. Install 3rd gear needle, 3rd input gear and 3rd gear baulk ring
bearing to input shaft.
3. Install spread spring, shifting insert, and 3rd & 4th synchronizer
hub onto 3rd & 4th coupling sleeve.
IPay attention to the shape of spread spring and shifting insert
for correct assembly.
Do not install spread spring hook onto the same shifting insert.
CAUTION:
Do not reuse 3rd & 4th synchronizer hub.
SMT841D Fixed
3rd & 4th coupling sleeve
Dimension ªLº
SMT140 Baulk ring to
gear clearance
SMT148A
SMT696D Input shaft
front bearing
Input shaft
SMT694D Shifting insert
(3rd & 4th) (5th & reverse)
Flat shape R-shape
Spread spring
Shifting insert
REPAIR FOR COMPONENT PARTSRS5F70A
Input Shaft and Gears (Cont'd)
MT-60
Page 2138 of 2267

IInstall synchronizer hub with its three grooves facing the front
side (3rd input gear side).
IInstall 3rd & 4th coupling sleeve with its chamfered surface
facing the 4th input gear side.
4. Position bearing replacer to the front side of input shaft front
bearing.
IAlign grooves of shifting insert and 3rd gear baulk ring. Then,
press it onto 3rd & 4th synchronizer hub assembly using a drift.
5. Install 4th gear C-ring onto input shaft.
6. Measure the end play of 3rd & 4th synchronizer hub, and
check if it is within allowable specification below.
End play specification:
0 - 0.06 mm (0 - 0.0024 in)
7. If not within specification, adjust the end play by changing
thickness of 4th gear C-ring.
Available C-ring:
Refer to SDS, MT-90.
8. Install 4th gear needle bearing, 4th gear baulk ring, and 5th
gear front C-ring.
9. Install 4th input gear.
SMT695D Front
SMT699D 4th input gear
3rd input gear
SMT698D 3rd & 4th
synchronizer
hub assembly
SMT700D Feeler gauge
3rd & 4th
synchronizer
hub assembly
4th gear C-ring
SMT701D 5th gear front C-ring
4th gear needle
bearing
4th gear baulk ring
REPAIR FOR COMPONENT PARTSRS5F70A
Input Shaft and Gears (Cont'd)
MT-61
Page 2139 of 2267

10. Position 5th input gear as shown in the figure, and install it on
input shaft.
11. Install 5th input gear.
CAUTION:
Do not reuse 5th input gear.
12. Install 5th gear rear C-ring onto input shaft.
13. Measure the end play of 5th input gear, and check if it is within
the allowable specification below.
End play specification:
0 - 0.06 mm (0 - 0.0024 in)
14. If not within specification, adjust the end play by changing
thickness of the 5th gear rear C-ring.
Available C-ring:
Refer to SDS, MT-90.
15. Install C-ring holder onto 5th gear rear C-ring.
CAUTION:
Do not reuse C-ring holder.
16. Install input shaft rear bearing.
CAUTION:
Install input shaft rear bearing with its brown surface facing
the input gear side.
17. Install oil channel onto input shaft.
18. Measure gear end play as a final check. Refer to, MT-58.
SMT703D 5th input gear
4th input gear
SMT702D 5th input gear
4th input gear
SMT704D 5th input gear
5th rear C-ring
Feeler gauge
SMT705D Input shaft rear bearing
C-ring holder
SMT671D Oil channel
Input shaft
REPAIR FOR COMPONENT PARTSRS5F70A
Input Shaft and Gears (Cont'd)
MT-62
Page 2140 of 2267
Mainshaft and Gears
DISASSEMBLYNCMT0013
1. Before disassembly, measure gear end play.
Gear end play:
Refer to SDS, MT-90.
IIf end play is not within the specificed limit, disassemble and
check the parts.
2. Remove snap ring.
3. Remove C-ring holder and mainshaft C-ring.
4. Press out mainshaft rear bearing from mainshaft.
5. Remove mainshaft thrust washer.
6. Remove snap ring from mainshaft. Then, remove reverse main
gear assembly, reverse gear needle bearing, and reverse gear
baulk ring.
SMT760D Mainshaft assembly
Feeler
gauge
SMT677D Snap ring
SMT678D C-ring holder
Mainshaft C-ring
SMT679D Mainshaft rear
bearing
SMT680D Mainshaft
thrust washer
Reverse main
gear assembly
REPAIR FOR COMPONENT PARTSRS5F70A
Mainshaft and Gears
MT-63
Page 2141 of 2267

7. Place bearing replacer between 5th & reverse synchronizer
hub and 5th main gear, and press out both reverse gear bush-
ing and 5th & reverse synchronizer assembly.
8. Remove 5th main gear, 5th gear baulk ring, and 5th gear
needle bearing.
9. Place bearing replacer between 3rd and 4th main gears, and
press out both 5th gear bushing and 4th main gear.
10. Remove mainshaft adjusting shim and spacer.
11. Place bearing replacer between 2nd main gear and 1st & 2nd
synchronizer hub, and press out both 3rd and 2nd main gears.
12. Remove 2nd double cone assembly, 2nd gear bushing, and
coupling sleeve assembly.
13. Place bearing replacer on 1st gear front side, and press out all
of 2nd gear bushing, 1st & 2nd synchronizer hub, 1st main
gear, and 1st double cone.
14. Remove 1st gear needle bearing.
INSPECTIONNCMT0014
Gear and ShaftNCMT0014S01
ICheck shaft for cracks, wear or bending.
ICheck gears for excessive wear, chips or cracks.
SMT681D Reverse gear bush
5th & reverse
synchronizer
hub assembly
SMT682D 5th gear bush
4th main gear
SMT683D 3rd main gear
Bearing replacer
2nd main
gear
SMT684D 2nd gear bush
1st & 2nd
synchronizer hub
1st main gear
SMT693D
REPAIR FOR COMPONENT PARTSRS5F70A
Mainshaft and Gears (Cont'd)
MT-64
Page 2142 of 2267

SynchronizersNCMT0014S02
ICheck spline area of coupling sleeves, hubs and gears for
wear or cracks.
ICheck baulk rings for cracks or deformation.
ICheck insert springs for wear or deformation.
IIf any crack, damage, or excessive wear is found on cam face
of baulk ring or working face of insert, replace it.
IMeasure the movement (play, dimension ªLº) of 1st & 2nd
coupling sleeve and 5th & reverse coupling sleeve with their
end fixed and the other end lifted as shown in the figure. If the
movement exceeds specification, replace the sleeve.
Coupling sleeve Length ªLº
1st & 2nd0 - 0.68 mm (0 - 0.0268 in)
5th & Reverse0 - 0.89 mm (0 - 0.0350 in)
IMeasure clearance between baulk ring and gear.
Clearance between baulk ring and gear:
Refer to SDS, MT-90.
BearingNCMT0014S03
IMake sure bearings roll freely and are free from noise, cracks,
pitting or wear.
SMT637A
SMT867D
SMT868D Fixed
Dimension ªLº
Fixed
Dimension ªLº 1st & 2nd coupling sleeve
5th & reverse coupling sleeve
SMT140 Baulk ring to
gear clearance
SMT148A
REPAIR FOR COMPONENT PARTSRS5F70A
Mainshaft and Gears (Cont'd)
MT-65
Page 2143 of 2267
IMeasure wear of 1st and 2nd baulk ring.
a) Place baulk rings in position on synchronizer cone.
b) While holding baulk ring against synchronizer cone as far as it
will go, measure dimensions ªAº and ªBº.
Standard:
A 0.6 - 0.8 mm (0.024 - 0.031 in)
B 0.6 - 1.1 mm (0.024 - 0.043 in)
Wear limit:
0.2 mm (0.008 in)
IIf dimension ªAº or ªBº is smaller than the wear limit,
replace outer baulk ring, inner baulk ring and synchro-
nizer cone as a set.
ASSEMBLYNCMT0015
1. Install 1st gear needle bearing and 1st main gear onto main-
shaft.
2. Install 1st double cone assembly onto mainshaft.
3. Install 1st & 2nd synchronizer hub with its three grooves fac-
ing the front side (1st main gear side) onto mainshaft.
CAUTION:
Do not reuse 1st & 2nd synchronizer hub.
SMT714CB Inner baulk ringSynchronizer
coneOuter baulk ring
Synchronizer cone
SMT706D 1st gear needle bearing
1st main gear
Mainshaft
SMT695D Front
REPAIR FOR COMPONENT PARTSRS5F70A
Mainshaft and Gears (Cont'd)
MT-66
Page 2144 of 2267
4. Install 1st & 2nd synchronizer hub.
5. Install insert spring onto 1st & 2nd coupling sleeve.
6. Install 1st & 2nd coupling sleeve with its chamfered surface
facing the 1st main gear side onto 1st & 2nd synchronizer hub.
7. Install 2nd gear bushing with its flange surface facing 1st & 2nd
synchronizer hub side.
8. Install 2nd needle bearing, 2nd double cone assembly, and
2nd main gear onto mainshaft.
9. Position 3rd main gear as shown in the figure, and install it.
CAUTION:
Do not reuse 3rd main gear.
SMT707D 1st & 2nd
synchronizer hub
1st gear double
cone assembly
SMT994BB 1st & 2nd coupling sleeve
SMT708D 2nd main gear
1st main gear
1st & 2nd coupling sleeve
SMT709D 2nd gear bush
SMT710D 2nd main
gear4th main
gear
3rd main gear3rd main gear
2nd needle
bearing
2nd main
gear
REPAIR FOR COMPONENT PARTSRS5F70A
Mainshaft and Gears (Cont'd)
MT-67