1998 HONDA CIVIC service

Mainshaft Assembly
Disassembly (cont'd)
3. Support the 3rd gear on steel blocks, and press the
mainshaft out of the 3rd/4th synchro hub as shown.
13-18
Inspection
'1. Inspect the gear surface and bearing surface for
wear and damage. then measure the mainshaft atpoints A, B, C, and D.
Siandard: A: 21.987 - 22.000 mm
10.8656 - 0.8661 inl
B: 26.980 - 26.993 mm
11.0622 - 1.0627 inl
C: 33.98,1- 34.000 mm(1.3380 - 1.3385 in)
D: 25.977 - 25.990 mm
|.1.0227 - 1.0232 inl
Service Limit: A: 21.930 mm 10.8634 inl
B: 26.930 mm {1.0602 in}
C: 33.930 mm (1.3358 in)
D: 25.920 mm (1.0205 in)
Check for wear and damage
lf any part of the mainshaft is less than the service
limit, replace it with a new one.
2. Inspect for runout.
Standardi 0.02 mm (o.(Xtl in) max.
S€rvice Limii: 0.05 mm (0.002 in)
NOTE: Support the mainshaft at both ends as
snown.
lf the runout is more than the service lirnit, reolace
the mainshaft with a new one.
Y

I)t
Clearance Inspection
NOTE: lf replacement is required, always replace the
synchro sleeve and hub as a set.
1. Measure the clearance between the countershaft
and lst gear.
Standard: 0.03 - 0.10 mm (0'(X)l - 0'qt4 in)
Sorvic. Limit: 0.22 mm (0.009 inl
2. lf the clearance is more than the service limit, mea-
sure the thickness of 1st gear.
Standard: 30./tl - 30.'l'l mm
11.197 - 1.198 in)
Servics Limit 30.36 mm (1.195 in)
lf the thickness of 1st gear is less than the service
limit, replace lst gear with a new one.
lf the thickness of 1st gear is within the service
limit, replace the lsv2nd synchro hub with a new
one.
GAUGE
1ST GEAB
3. Measure the clearance between 2nd and 3rd gears.
Standard: 0.04 - 0.12 mm (0.002 - 0.005 in)
Servico Limit: 0.2,1 mm 10.009 in)
4. lf the clearance is more than the service limit, mea-
sure th€ thickness of the spacer collar'
stlndard: 32.G1 - 32'06 mm
{1.261 - 1.262 in}
S6rvica Limh: 32'01 mm (1'260 in)
SPACERCOLLAR
lf the thickness is less than lhe service limit, replace
the sDacer collar with a new one.
lf ths thickness is within the service limit, measure
the thickness of 2nd gear.
Standard: 31.91 - 31.96 mm
11.256 - 1.258 inl
Soryice Limit 31.85 mm (1.25,1inl
z4:_- 2I{D GEAF
/l\\/j'T - "b/
P-
1^'.-1r.--l--f
lf the thickness of 2nd gear is less than the ser-
vice limit, replace 2nd gear with a new one.
lf the thickness of 2nd gear is within the servace
limit, replace the lsv2nd synchro hub with a new
one,
13-21

Inspection
1.surfaces lor
countershaftInspect the gear surfaces and bearang
wear and damage, then measure tne
at points A, B, and C.
Standard: A: 30.000 - 30.015 mm
(1.1811- 1.1817 inl
B: 35.984 - 36.000 mm
(1.i1167 - 1.4173 inl
C: 24.980 - 2i1.993 mm
{0.9835 - 0.9840 in)
Seryice Limit: A: 29.950 mm (1.1791 inl
B: 35.930 mm (1 '1146 in)
C: 24.930 mm 10.9815 in)
Check oil passages
for cloggrng-
ICheck for wearano oamage.
. lf any part of the countershaft is less than
service limit, replace it with a new one.
Inspect for runout.
Standard: 0.02 mm (0.001 inl max.
Seryice Limit: 0.05 mm {0'002 in)
. lf the runout is more than the service limit. replace
the countershaft with a new one.
the
2.
t,3. Install the parts on the countershait
Reassembly
CAUTION:
. Press the 3rd,4th, and sth gears on the countershaft
without lubrication.
. When installing the 3rd. 4th, and 5th geals, support
the shaft on steel blocks and installthe gears using a
pless.
NOTE: Reler to page 13-20 for reassembly sequence'
1. lnstall the needle bearing on the countershaft'
, 36x41 x 25.5mmNEEDLE BEARING
COUNTERSHAFT
2. Assemble the pans below as shown.
NOTE: Check that the fingers of the friction damper
are securely set in the grooves of the 1sv2nd syn-
chro hub.
2ND GEAR
39x/+4x27mmNEEDLE BEARING
SPACER COLLAR
FRICTION DAMPER
SYNCHRO RING
SYNCHRO SPRING
REVERSE GEAR
lST/2NOSYNCHRO HUB
SYNCHRO SPRING
SYNCHRO RING
FRICTION DAMPER
1ST GEAR
(cont'd)
13-23

Shift Fork Assembly
Clearance Inspection
NOTE: The synchro sleeve and the synchro hub shouldbe replaced as a set.
l. Measure the clearance between each shift fork andits matching synchro sleeve.
Standard: 0.35 - 0.65 mm {0.014 - 0.026 intService Limit 1.0 mm (0.04 in)
2. lf the clearance is more than the service limit, mea-
sure the thickness of the shift fork fingers.
Standard:
3rd/ilth: 7.il - 7.6 mm {0.291 - 0.299 in}lst/2nd, 5th: 6.2 - 6.il mm (O.2,tt - 0.252 in)
lf the thickness of the shift fork finge.s is notwithin the standard, replace the shift fork with anew one.
lf the thickness of the shift fork fingers is withinthe standard. replace the synchro sleeve with a
SHIFT FORK
13-26
J
3. Measure the clearance between the shift piece orshift fork and the shift arm B.
Standard: 0.2 - 0.5 mm {0.008 - 0.02 in}
Sarvice Limit: 0.62 mm 10.0244 inl
4. lf the clearance is more than the service limit, mea-sure the groove of the shift piece or shift fork,
Standard: 13.2 - 13.4 mm (0.520 - 0.b28 inl
lf the groove of the shift piece or shift fork is notwithin the standard, replace the shift piece orshift fork with a new one.
lf the groove of the shift piece or shift fork iswithin the standard, replace the shift arm B witha new one.
\J

Synchro Sleeve,
Synchro Hub
MBS Shift Piece InsPection
1. Measure the width of the MBS shift piece.
Standard; 6.9 - 7.1 mm 10 272 - 0.280 inl
Service Limit: 6.8 mm {0.268 inl
lf the width of the MBS shift piece is less than
service limit, replace the MBS shift piece'
t
I nspection/l nstallati on
'1.lnspect gear teeth on all synchro hubs and synchro
sleeves tor rounded off corners, which indicate
Install each synchro hub in its mating synchro
sleeve, and check for freedom of movement.
NOTE: lf replacement is required, always replace
the synchro sleeve and synchro hub as a set.
SYNCHROSLEEVE
When assembling the synchro sleeve and synchro
hub, be sure to match the three sets of longer teeth
(120 degrees apart) on the synchro sleeve with the
three sets of deeper grooves in the synchro Hub
CAUTION: Do not install th€ sYnchro sleeve with
its longsr t€sth in the synchro hub slots bocause ii
will damage ths spring ring.
LONGER TEETH
13-27

Synchro Ring, Gear
Inspection
1. Inspect the synchro ring and gear.
A: Inspect the inside of the synchro ring for wear.
B: Inspect the synchro sleeve teeth and matching
teeth on the synchro ring for wear (rounded off).
r- /-\
oioi *-o*
C: Inspect the synchro sleeve teeth and matching
teeth on the gear for wear (rounded off).
,

UtJGOOO WORN
D: Inspect the gear hub thrust surface for wear.
E: Inspect the cone surface for wear and roughness.
Fr Inspect the teeth on all gears for uneven wear,
scoring, galling, and cracks.
2. Coat the cone surface of the gear with oil. and place
the synchro ring on the matching gear. Rotate the
synchro ring. making sure that it does not slip.
Measure the clearance between the synchro ring
and gear all the way around.
NOTE: Hold the synchro ring against the gear evenly
while measuring the clearance.
Synchro Ring-to-Gear Clearance
Standard: 0.73 - 1.18 mm {0.029 - 0.046 in}
Service Limit 0.4 mm {0.02 in)
lf the clearance is less than the service limit, replace
the synchro ring and synchro cone.
SYNCHRO
SYNCHRO
\a
r/
13-28

Reverse Shift Holder, Reverse ldler Gear
Clearance Inspection (cont'dl
3. Measure the clearance between the reverse
gear and the reverse shift holder.
Standard: 0.5 - 1.0 mm 10.02 - 0.04 inl
Service Limit: 1.8 mm (0.07 inl
id ler
lf the clearance is more than the service limit. mea,
sure the width of the reverse shift holder.
Standard: 13.0 - 13.3 mm (0.512 - 0.524 in)
lf the width is not within the standard, replace
the reverse shift holder with a new one.
lf the width is within the standard, replace the
reverse idler gear with a new one.
REVERSE SHIFT HOLDER
13-58
Removal
1. Remove the reverse shift holder.
Remove the reverse idler gear and the reverse idlergear shaft.
REVERSE SHIFT HOLDEB
REVERSEIDLER

Change Holder AssemblY
,Glearance InsPection
1.Measure the clearance between the shift piece and
the shift arm holder.
Standard: 0.1 - 0.3 mm {0.004 - 0.012 in)
service Limit: 0.6 mm {0.02 in)
lf the clearance is more than the service limit, mea-
sure the width of the groove in the shift piece'
Standard: 8.1 - 8 2 mm {0'319 - 0.323 in}
lf the width of the groove is not within the stan-
dard, replace the shift piece with a new one'
lf the width of the groove is within the standard,
replace the shift arm holder with a new one'
SHIFT PIECE
SHIFT ARM HOLDER
SHIFT PIECE
4.
3. Measure the clearance between the select arm and
the interlock.
Standard: 0.05 - 0.20 10 002 - 0.008 inl
Service Limit:0.45 mm (0.018 inl
lf the clearance is more than the service limit, mea-
sure the width of the interlock.
Standatd: 9.9 - 10.0 mm (0.390 - 0.39't in)
lf the width is not within the standard, replace
the interlock with a new one.
lf the width is within the standard, replace the
select arm with a new one.(cont'd)
INTERLOCK
13-59