Page 465 of 1395
Mainshaft Assembly
Inspection
1.Inspect the gear surface and bearing surface for
wear and damage, then measure the mainshaft at
points A, B, and C.
Standard:
A (Ball bearing surface): 27.987 - 28.000 mm
11.1018 - 1.1024 inl
B (Needle bearing surfacel: 37.984 - 38.000 mm(1.4954 - 1.4961 inl
C {Bafl bearing surfacel: 27.977 -27.990 mm
(1.1015 - 1.1020 inl
Service Limit: A:27.94 mm (1.100 in)
B: 37.93 mm (1.'193 inl
C: 27.94 mm 11.100 inl
Inspect oil passages Ior clogging.
lf anv oart of the mainshaft is less than the service
limit. reolace it with a new one.
2. Inspect for runout.
Standard: 0.02 mm (0.0008 in) max.
Service Limit: 0.05 mm 10.002 inl
NOTE: Support the mainshaft at both ends
sh own.
lf the runout is more than the service limit, reDlace
the mainshaft with a new one.
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Page 466 of 1395
Reassembly
NOTE: Refer to page 13-23 for reassembly sequence.
1. Suppon 2nd gear on steel blocks as shown, then
install the 3rd/4th synchro hub using the special
tools and a press as shown.
NOTE: After installing, inspect the operation of the
3rd/ 4th synchro hub set.
PRESS
I
3RD/4THSYNCHRO HUB
DRIVER, ,l(} mm l.O.
07746 - 0030' 1 00
2.
2NO GEAR
Install the sth synchro hub using the special tools
and a press.
PRESS
I
DRlvER,40 mm l.D.
077{6 - 00301(x)
ATTACHMENT,35 mm l.D.077i16 - lx)3ollx)
sTH SYNCHBO HUB
3. Install the angular ball bearing using the special
tools and a oress. Note the direction of installation.
PRESS
I
077a6 - 0011x100
HANDLE07749 - 0010000
ATTACHMENT,/Vl x a7 mm
BALL BEARINGNote the dirediono{ installation.
13-27
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Page 467 of 1395
Countershaft Assembly
Index
NOTE:
3
The 3rd, 4th. and sth gear are installed with a press.
Prior to reassembling, clean all the parts in solvent, dry them, and apply lubricant to any contact surfaces. The 3rd,
4th, and sth gears, however. should be installed with a press before lubricating them.
LOCKNUT Replace.127-o-127N.m
113-0- 13kstmi
\94-0- 9.trbtft /
IST/2ND SYNCHRO HUBInspection, page 13 36
Check lor wear anddamage.
THRUST WASHERInspection, page 13-29
DAMPER
WASHER
AEARINGCheck for wear and ooeration.
BEARINGCheck for wear andoperation.
GEAR
4TH GEAR
3RD GEAR
GEAR
SPNING
DOUBI.f CONE
Inspection, page 13-37
1ST GEARInspection, page 13 29,37
BEARINGCheck tor wear and operation.
Inspection, page 13-30, 37
NEEDLE BEARINGCheck for wear and oPeration
SPACERSelection, page 13-30
DAMPERCheck for wear and damage.
DOUBLE CONE
Inspection, page 13-37
SPRING
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Page 468 of 1395
Clearance Inspection
NOTE: lf replacement us required, always replace the
synchro sleeve and hub as a set.
1. Measure the clearance between the lst oear and
thrust washer.
Standard: 0.06 - 0.18 mm (0.@2 - 0.007 in)
Servica Limit:0.23 mm {0.009 in)
THRUST WASHER
2.lf the clearance is more than the service limit, mea-
sure the thickness of the thrust washer.
Standsrd: 1.95 - 1.97 mm (0.077 - 0.078 in)
3. lf the thickness is less than the standard, reDlace the
thrust washer with a new one. lf the thickness is
within the service limit, measure the thickness of
the 1st gear.
Standard: 26.95 - 27.00 mm (1.061 - 1.063 inl
lf the thickness of 1st gear is less than the stan-
dard, replace 1st gear with a new one.
lf the thickness of lst gear is within the standard.
replace 1sv2nd synchro hub with a new one.
{cont'd}
13-29
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Page 469 of 1395
Countershaft Assembly
Clearance Inspection (cont'dl
4. Measure the clearance between the 2nd qear and
3rd gear.
Standard: 0.07 - 0.1,1 mm (0.003 - 0.006 inl
Service Limit:0.18 mm (0.007 inl
FEET.ERGAUGE
!t . -]
lf the clearance is more than the service limit. mea-
sure the thickness of the spacer.
Standard: 29.07 - 29.09 mm (l.14il - 1.145 inl
13-30
6. lf the thickness is less than the standard, reDlace the
spacer wrln a new one.
lf the thickness is within the standard, measure the
thickness of the 2nd gear.
Standald: 28.92 - 28.97 mm (1.139 - 1.141 in)
lf the thickness of 2nd gear is less than the stan-
dard, replace 2nd gear with a new one.
lf the thickness of lst gear is within the standard,
replace 1sv2nd synchro hub with a new one.
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Page 470 of 1395
Disassembly
1.
2.
Securely clamp the countershaft assembly in a
bench vise with wood blocks.
SPRIiIG WASHEF
BETICHvtsE
W(X)D BLOCKS
Raise the locknut tab from the groove in the coun-
tershaft, then remove the locknut and the spring
washer.
Remove the ball bearing using a press as shown.
CHISEL
4. Remove the Jriction damper from the spacer using a
press and a socket.
Support lst gear on steel blocks, and press the
countershaft out of 3rd gear.
PRESS
t
5.
PRESS
I
3RD GEAR
1ST GEAR
FRICTION DAMPERInspect lor wear and damage.
13-31
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Page 471 of 1395
Countershaft Assembly
Inspection
1. Inspect the gear surface and bearing surface Ior
wear and damage, then measure the countershaft
at points A, B, and C.
Standa.d:A: 36.000 - 36.015 mm
11.,1173 - f.ill79 inl
B: 36.98/t - 37.000 mm
{r.4561 - 1.4567 inl
C: 24.987 - 25.000 mm
{0.98:17 - 0.9843 inl
Servics Limit: A:35,95 mm (1.'115 in)
B: 36.93 mm (1.454 in)
C: 24.94 mm (0.982 in)
lf anv part of the countershaft is less than the ser-
vice limit. reolace it with a new one.
lnspect for wear and damage.
13-32
2. Inspect for runout.
Standard: 0.02 mm 10.0008 inl max.
Service Limit: 0.05 mm {0.002 inl
NOTE: Support the countershaft at both ends as
shown.
Rotate two complete revolutions.
lf the runout exceeds the service limit, reDlace the
countershaft with a new one.
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Page 472 of 1395
Reassembly
Note these items during reassembly:
. Press the 3rd, 4th, and sth gear on the countershaft
without lubrication.
. When installing the 3rd, 4th. and sth gears, suppon
the shaft on steel blocks and install the gears using a
press.
. Refer to page 13-28 for reassembly sequence.
1. Install the thrust shim, needle bearing, 1st gear, and
friction damper.
NOTE: Reassembly the friction damper on the lst
gear before installation.
rnrcrroru orn,leen ----.-4O)
lST GEAR
NEEDLE BEARING
THRUST SHIM
2. Install the double cone synchro.
3. Install the 1sv2nd synchro hub by align the friction
damper fingers with 1svznd synchro hub grooves.
(cont'd)
OUTER
lST/2ND
13-33
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