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Service BulletinVolvo Truck CorporationGteborg, Sweden
Trucks
Date Group No. Release Page
10.2010 431 256 18 1(49)
Gearbox, Disassembly-Inspection-Assembly
(Gearbox removed)
FH/FM
AT2412C, AT(O)2512C, AT2812C,ATO3112C
Gearbox, Disassembly-Inspection-Assembly
T4021207
89002260ENG46029 English
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 2(49)
Service Procedures
43187-4Gearbox, disassemble-inspect-assemble
Gearbox removedIllustrations are used for several different
variants: some details may therefore differfrom the variant you are
working on. The essential information in the illustrations
ishowever always correct.
Note: For replacement of GCU (Gear Control unit) or TECU, read
first Function Group4319, Information type Diagnostics MID 130 PID
160 Parametersetting.
WARNING
Always wear safety glasses when using compressedair in the
gearbox.
General information about axial play
For clutch housing with part number 20483498 at AT2412C and
ATO2512C
T4059270
Replace with new part. See step 23.
Note: To check the part number remove GCU.
Clutch housing with other part numbers
If the criteria 1 and 2 are fulfilled, glue theouter race of the
input and counter shaftbearings into position. Use VOLVO gluewith
part number 8701374. See step 92and 93.
1 Pretension the main and coutershaft.
2 Check axial play on the main andcounter shaft. It should be
maximum0.25 mm. See step 53.
3 Check radial play on the inputand counter shaft. The
outerraces should not be loose and/ornot be possible to rotate in
roomtemperature. See step 78.
If the criteria 1 or 2 is not fulfilled, replacethe clutch
housing.
Basic housing
If the feeler gauge can be inserted replacethe basic housing
Check the gap between the basichousing and bearing outer race on
themain and counter shaft. Use feelergauge with thickness 0.05 mm
andmaximum width 10 mm. See step 64.
If the feeler gauge can not be inserted usethe O-ring kit. See
step 111 and 121.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 3(49)
Special tools: 9986485, 9989876, 9990027,9990028, 9990029,
9990031, 9990120, ,9992000, 9992215, 9992337, 9992613,9992619 ,
9992671, 9996041, 9996042,9996081, 9996176, 9996222,
9996239,9996315, 9996479, 9996483, 9996876,9996889, 9996905,
9996910, 9996917,9996925, 9998051, 9998401, 9998542,9999696,
9999737, 88800211, 88800006,88800015, 88800033, 88800034,88800035,
9992003
Other special equipment 88890148,88890149
ContentsDisassembly, page 4 .
Inspection, page 31.
Assembly, page 31.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 4(49)
Disassembly1
1Clean the outside of the gearbox.
Note: Plug nipples and valves during high pressurewashing.
2
T4021646
2Connect a computer with the VCADS program installed.Use 40091-3
Gearbox activation, control housing(for removal/fitting). In order
for you to be able toremove the control housing, the splitter gear
must be inits rear position, 2nd and 3rd in neutral and
1st/reversein the rear position and set to the high range.Go to
step 14 if the VCADS program makes contactwith TECU. Otherwise go
to the next step.
3
T4021646
3
Note: If VCADS Pro cannot make contact with theTECU the control
housing must be manually moved tothe correct position so that it
can be lifted away fromthe gearbox.
The illustration shows the positions that the different
aircylinders in the control housing must have in order forthe
control housing to be lifted away.In order for you to be able to
remove the controlhousing, the splitter gear must be in its rear
position,2nd and 3rd in neutral and 1st/reverse in the rearposition
and set to the high range.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 5(49)
4
T4022582
4Remove the screws holding the control housing on thegearbox.
Remove the screws holding the cover on theTECU. The figure shows
the screw for the cover.
5
T4020597
5Carefully lift the cover and disconnect the cableharness
between the cover and control housing.
6
T4022631
6Fit 4 screws (see figure). Tighten the screws so as notto
damage the surface of the control housing. Thisensures that the
control housing cannot move anddamage the pulse wheel on the main
shaft.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 6(49)
7
T4023202
DD
T4023201
OD
7The figure shows where the various air ducts are thatare used
to manually operate the control housing aircylinders.
8
T4022534
DD
8Put the splitter gear in its rear position using acompressed
air nozzle. If possible engage the forwardposition first in order
to check that the splitter gearmoves correctly.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 7(49)
T4022533
OD
T4022535
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 8(49)
9
T4022531
T4022532
9Put the range gear in its forward position using acompressed
air nozzle. If possible engage the rearposition first in order to
check that the splitter gearmoves correctly.
10
T4023203
10Check whether the gearbox is in neutral by turning theoutput
shaft companion flange. If it does, blow in thehole for reverse to
engage the basic gearbox reversegear. If not, go to the next
step.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 9(49)
11
T4022583
11
If it is not possible to engage reverse gear, engage 2ndor 3rd
gear.
The 2nd and 3rd gear air cylinder must be in neutralbefore
reverse gear can be engaged. Note that thereis a mechanical
engagement interlock built into thecontrol housing that makes it
impossible to engagereverse unless 2nd or 3rd gear air cylinder is
in neutral.
12
T4022537
T4022538
12Use a compressed air nozzle to put 2nd and 3rd gearair
cylinders in neutral by carefully blowing into 2ndand 3rd gear
holes while at the same time turning theoutput shaft companion
flange a little in order to betterfeel when neutral is engaged.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 10(49)
13
T4023203
13Use a compressed air nozzle to engage the basicgearbox reverse
gear.
14
T4020995
14Remove the electrical connector for the clutch valveassembly
in the control housing.
15
T4020994
15Remove the pneumatic connection to the valveassembly, and
remove the three screws securing thevalve assembly.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 11(49)
16
T4020996
16Remove the electrical connection for the clutch positionsensor
on the valve assembly. Remove the valveassembly.
17
T4020968
17Fit the spacer flange onto the fixing plate. With the aidof
the arm, fit the fixing plate to the gearbox. Securethe gearbox
into the unit stand.
9986485, 9990031, 9996905, 9999737
18
T4022639
18Drain the gearbox oil.
WARNING
Hot oil can cause burns. Use protective gloves.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 12(49)
19
T4020962
19Remove the oil filter drain plug. Refit the drain plugafter
the oil has finished draining.
20
T4020963
20Remove the oil filter cover and guide sleeve.
Note: There will be a little oil left in the cover.
21
T4020964
21Remove the oil filter housing and where applicable theoil
cooler.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 13(49)
22
T4018975
22Remove the control housing. If necessary, carefullyuse a
crowbar to loosen the control housing from itsguide pins.
9992337
23
T4059270
23Check the part number on the clutch housing. Partnumber
20483498 on AT2412C and ATO2512C shallbe replaced with a new.
2424If the gearbox is equipped with a retarder, perform step25
27. Otherwise go to step 28.
25
T4020965
25Remove the retarders temperature sensor from theheat exchanger
or alternatively, remove the connectorfrom the plate.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 14(49)
26
T4020966
26Remove the retarder wiring cable ties.
27
T4020967
27Remove the three screws securing the heat exchangerand
retarder cooler.
2828Turn the gearbox so that the output shaft flange
facesupwards.
29
T4021488
29Fit counterhold 9998570.Remove the companion flange nut and
O-ring.
9998570
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 15(49)
30
T4022460
30Remove the companion flange.
9990084, 9992619, 9992671, 9996156, 9996222,9998597
31
C4052785
31Remove the plug, spring and blocking body for therange
function. If necessary use a magnet to pull outthe blocking
body.
3232If the gearbox is equipped with a retarder, perform step33
34. Otherwise go to step 35.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 16(49)
33
T5012262
33Remove the four nuts securing the retarder to the rangehousing
(A, B, C and D in the illustration).
3434Carefully lift the retarder away from the gearbox.
35
T4023008
35Remove the range housing securing screws.
Note: If the gearbox has a retarder, do not forget toremove the
screws from the retarder socket.
36
T4023007
36Fit the adapter and lifting eye into the output shaft.
9996479, 9996925
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 17(49)
37
T4023009
37Split the main housing and range housing. Use presstool.
9998051
3838Lift the range housing away carefully.
Note: Ensure that the range cylinder piston rod doesnot jam in
the gearbox housing, the shaft may then bedamaged.
39
T4021428
39Remove the oil distributor pipe. Use a socket.
9990027
40
T4021426
40Remove the circlip securing the high rangesynchronizer.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 18(49)
41
T4021427
41Remove both halves of the washer.
42
T4021425
42Fit both the puller halves on to the high rangesynchronizer
hub.
88800015
43
T4021429
43Fit one half of the puller 9998542 on to the puller
rings,together with the hydraulic cylinder, spindle and drift.
Note: Ensure that the split in the puller rings is at 90to the
split in the puller.
88800015, 9992619, 9992671, 9996889, 9998542
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 19(49)
44
T4021430
44Fit the other half of the puller 9998542. Fit the
hydraulicpump. Press off the high range synchronizer.
9996222
45
T4023474
45Check the part no. of the spacer sleeve and check TPI431-033
in parts information.If necessary, replace the spacer sleeve
according tosteps 46 Remove the old spacer sleeve., page 19 48 Fit
the new spacer sleeve.
9996222, 9992671, 88800246, 9996315, 9996917, page 20Otherwise
go to step 49 Fit screw 9996917 on to the main shaft and
screw9996483 on the counter shaft.
9996917, 9996483, page 20
46
T4023475
46Remove the old spacer sleeve.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 20(49)
47
T4023476
47Transfer the piston rings to the new spacer sleeve.
48
T4023477
48Fit the new spacer sleeve.
9996222, 9992671, 88800246, 9996315, 9996917
49
T4021483
49Fit screw 9996917 on to the main shaft and screw9996483 on the
counter shaft.
9996917, 9996483
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 21(49)
50
T4021484
50Rotate the shafts 20 turns.
51
T4021485
51Attach the dial gauge to the magnetic stand. The tip ofthe
dial gauge should touch the sun wheel.Zero the dial gauge and mark
up the measurementpoint.
9989876, 9999696
5252Turn the gearbox 1/2 turn. Lift the measuring probeand turn
the shaft 20 turns, read off the backlash at themarked position and
note it.
5353Check axial play on the main shaft and counter shaft.Maximum
axial play is 0.25 mm.If the axial play is more than maximum,
replace theclutch housing with a new.
5454Turn the gearbox 1/2 turn.
55
T4021483
55Remove
Dial indicator 9989876 Magnetic stand 9999696 Bolt 9996917 Bolt
9996483
9989876, 9999696, 9996917, 9996483
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 22(49)
56
T4021431
56Remove the reversing shaft centre screw.
57
T4059192
57Remove the rear cover, adjustment shim and anypossible O-ring
for the counter shaft.
58
T4021432
58Fit the puller and spindle to the reversing shaft.
9996315, 9996917
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 23(49)
59
T4021433
59Fit the hollow drift, hydraulic cylinder and hydraulicpump to
the spindle.
9990120, 9992671, 9996222
6060Press out the reversing shaft.
61
T4020987
61Remove the oil pump with the reverse gear pinion.
62
T4059189
62Remove the rear cover and any possible O-ring for themain
shaft and where applicable the oil pipe for theoverdrive gear.
Note: Tow alternatives, A and B
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 24(49)
63
T4021435
63Remove the adjustment shim for the main shaft.
64
T4059304
64Use feeler gauge with thickness 0.05 mm and maximumwidth 10 mm
to check the gaps.If the feeler gauge can be inserted, replace the
basichousing.
6565Turn the gearbox so that the input shaft (the shaft
withdiscs) faces upwards.
66
T4020990
66Remove the clip securing the air hose in the clutchcylinder.
Carefully remove the clamps for the electricalcable and the air
hose to the clutch cylinder. Removethe three clutch cylinder
screws.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 25(49)
67
T4020991
67Remove the air hose for the clutch cylinder and the airpipe
for the counter shaft brake.
68
T4020992
68Remove the counter shaft brake.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 26(49)
69
T4020993
69Remove the piston A and spring B for the counter
shaftbrake.
7070Remove the clutch housing.
71
T4019239
71Remove the air pipe nipple for the counter shaft
brakepipe.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 27(49)
72
T4019240
72Remove the sleeve from the intermediate shaft.
7373Remove the magnet located between the clutchhousing and the
lower part of the base housing. Cleanthe magnet.
74
T4021049
74Prepare the lifting tool as illustrated. Use the two
liftingarms and the spacer ring from special tool 9990028,lifting
arm kit 88800006, fixture plate and chain. Fit thelifting tool into
the shaft assembly.
88800006, 9990028, 9996239, 9996910
75
T4021768
75Make a wooden fixture as illustrated to receive the
shaftpackage.
Note: The main shaft must not be placed on aworkbench or
similar. This can damage the gear teeth.Therefore all work must be
carried out with the mainshaft upright.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 28(49)
76
T4021767
76Carefully lift out the shaft assembly and place it in
thewooden fixture.
7777Remove the lifting tool from the shaft assembly.
78
T4060707
78Check radial play on the counter shaft and the inputshaft. If
the outer races are loose and/or possible torotate in room
temperature, replace the clutch housing.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 29(49)
79
T4021545
79Pull the counter shaft outer race out of the clutchhousing.
Use a puller, yoke, cylinder, pump and spindle.
Note: Only remove the outer race if the bearing willbe
changed.
88800033, 88800035, 9992671, 9996041, 9996222
80
T4021544
80Pull the input shaft outer race out of the clutchhousing. Use
a puller, yoke, cylinder, pump and spindle.
Note: Only remove the outer race if the bearing willbe
changed.
88800033, 88800034, 9992671, 9996041, 9996222
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 30(49)
81
C4060678
81Drive the outer race of the counter shaft rear bearingout of
the gearbox housing. Use a drift and handle.
Note: Only remove the outer race if the bearing willbe
changed.
A= 9992000B= 9996081
9992000, 9996081
82
T4019212
82Drive the outer race of the main shaft rear bearingout of the
gearbox housing. Use a drift and handle.
Note: Only remove the outer race if the bearing willbe
changed.
9992613, 9996176
83
T4021270
83Remove the oil screen and the overflow valve.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 31(49)
Inspection84
84Clean all parts. Check bearings, shafts, gears
andsynchronizers for damage and wear. Replace damagedor worn
parts.
CAUTION
New bearings and bearing races must be taken fromthe same
package.
8585Lubricate all parts with gearbox oil before
installation.
Assembly86
T4021804
86Drive the outer race of the main shaft rear bearinginto the
housing until the outer race is about 5 mmabove the bottom of the
gearbox housing. Do the samething for the outer race for the
counter shaft.If the outer races have not been removed, they
shouldbe tapped out so that they are about 5 mm above thebottom of
the gearbox housing.
Note: This step must be performed to ensure that themeasurements
of the shaft assembly will be correct.
87
T4021270
87Turn the gearbox over 1/2 turn. Fit the oil screen andoverflow
valve. Torque tighten the valve.
45 5 Nm88890148
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 32(49)
88
T4021049
88Assemble the shaft assembly. Secure the lifting tool tothe
shaft assembly. Lubricate all bearings.
Note: It is important that the bearings are oiled, to givethe
correct clearances.
88800006, 9990028, 9996239, 9996910
8989Carefully lift the shaft assembly into the
gearboxhousing.
9090Remove the fixture and the three lifting arms from
theshafts.
91
T4019239
91Install the nipple for the air pipe for the counter
shaftbrake.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 33(49)
92
T4021542
92Use VOLVO glue with part number 8701374 to fix thecounter
shaft outer race into position.When changing the counter shaft
outer race in theclutch housing, press it in so that it bottoms in
theclutch housing.
9992003, 9996041, 9996042, 9992671, 9996222
93
T4021543
93Use VOLVO glue with part number 8701374 to fix theinput shaft
outer race into position.When changing the input shaft outer race
in theclutch housing, press it in so that it bottoms in theclutch
housing.
9992671, 9996041, 9996042, 9996081, 9996222,9998401
94
T4019215
94Apply VOLVO approved high-temperature liquidgasket to the main
housings mating surfaces to theclutch housing according to the
illustration. Fit themagnet.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 34(49)
9595Put the clutch housing on the base housing. Make surethat
the guide dowels enter their holes in the clutchhousing.
9696Install the clutch housing screws and torque tightenthem
alternately.
110 10 Nm88890149
97
T4021445
97Remove the seal for the input shaft. Use a lever.
Note: Replace the seal if necessary.
9992337
98
T4059186
98Press in the seal with a drift, (A) 88800211.
Note: Fill the space between the seal lips to 1/3 witha VOLVO
approved grease. Avoid getting grease onthe felt ring. Oil in the
sealing ring mating face to theinput shaft before assembly.
88800211
9999Turn the gearbox 1/2 turn.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 35(49)
100
T4021435
100Install a shim with thickness approximately 0.9 mm.
101
T4059189
101Install the rear cover.Torque tighten diagonally.
Note: Two alternatives, A and B
405 Nm
102
T4059190
102Install a shim with thickness approximately 0.9 mm.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 36(49)
103
T4059192
103Install the counter shaft cover.Fit the screws and torque
tighten them diagonally.
405 Nm
104
T4019217
104Lock the gears with the holder for the clutch sleeves.
Note: When measuring the main and counter shaft,gear 2 LS shall
be engaged.Without overdrive: The splitter gear clutch ring in
itsfrontmost position.With overdrive: The splitter gear clutch ring
in itsrearmost position.The counter shaft brake must not be
engaged.
9990029
105
T4021483
105Fit screw 9996917 on the main shaft and screw9996483 on the
counter shaft.
9996917, 9996483
106
T4021484
106Rotate the shafts 20 turns.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 37(49)
107
T4021485
107Attach the dial gauge to the magnetic stand. The tip ofthe
dial gauge should touch the sun wheel. Zero thedial gauge and mark
up the measurement point.
9989876, 9999696
108108Turn the gearbox 1/2 turn. Lift the measuring probeand
turn the shaft 20 turns, read off the backlash at themarked
position and note it.
109
T4059189
109Turn the gearbox 1/2 turn.Remove the main shaft cover.
Note: Two alternatives, A and B
110
T4021435
110
Install a shim that is between 0.1 and 0.2 mm thickerthan the
measured play together with the existing shim.This gives a preload
of between 0.1 and 0.2 mm.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 38(49)
111
T4059188
Alternative 1
T4059187
Alternative 2
111Install O-ring.
Note: Two alternatives, 1 and 2
112
T4059189
112Install the main shaft cover.Torque tighten the screws
diagonally.
Note: Two alternatives, A and B
405 Nm
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 39(49)
113
T4021484
113Rotate the shafts 20 turns.
114
T4021486
114Turn the dial gauge to the counter shaft. The tip of thedial
gauge should touch the counter shaft. Zero the dialgauge and mark
up the measurement point.
115115Turn the gearbox over 1/2 turn.
116116Lift the tip of the dial gauge and rotate the countershaft
at least 20 turns. Read off the clearance from themarked
measurement point and note the value.
117117Turn the gearbox over 1/2 turn.
118
T4021483
118Remove
Dial indicator 9989876 Magnetic stand 9999696 Bolt 9996917 Bolt
9996483
9989876, 9999696, 9996917, 9996483
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 40(49)
119
T4059192
119Remove the counter shaft cover.
120
T4059190
120Install a shim that is between 0.1 and 0.2 mm thickerthan the
measured play together with the existing shim.This gives a preload
of between 0.1 and 0.2 mm.
121
T4059191
121Install O-ring.
122
T4059192
122Remove the counter shaft cover.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 41(49)
123
T4021482
123Fit a new gasket on the oil pump.
124
T4020987
124Install the oil pump. Hammer the reversing shaft intothe
gearbox housing using a plastic mallet. Fit thescrews into the
reversing gear and torque tighten.
Note: Make sure that the bevel for the rotation lockis in the
correct position.
488 Nm88890148
125
T4059192
125Install the counter shaft coverr.
Note: Torque tighten the screws diagonally.
405 Nm88890148
126126Where applicable fit the overdrive oil pipe.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 42(49)
127
T4022457
127Press in the synchronizer for high range.
88800015, 9992671, 9996081, 9996222, 9996315,9998542
128
T4021427
128Fit both the washer halves.
129
T4021426
129Fit the high range circlip.
130
T4019217
130Remove the forks 9990029 holding the clutch sleevesin
place.
9990029
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 43(49)
131
T4021428
131Oil and fit new O-rings. Install the oil distribution
piping.Torque tighten the oil distribution piping. Use a
socket.
9990027250 35 Nm88890149
132
T4023186
132Apply VOLVO approved high-temperature liquidgasket.
133
T4023007
133Fit the adapter and lifting eye into the range sectionoutput
shaft. Position the range housing over the mainhousing. Lower and
line up the piston rod and planetwheel. Secure the range housing.
Torque tighten thebolts.
Note: Insert the guide pins 9996876 into the gearboxhousing to
facilitate the assembly.
9996479, 9996876, 9996925110 10Nm88890149
134134If the gearbox is equipped with a retarder, performsteps
135 140. Otherwise go to step 141.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 44(49)
135
T5012262
135
Fit the retarder with a new O-ring, greased with silicongrease.
Guide the bolts into the holes and lower theretarder into position.
Fit the nuts and tighten them byhand as illustrated in the order A,
B, C and finally D.Torque tighten the nuts in the same order.Then
angle-tighten the nuts 45 in the same order.Then angle-tighten the
nuts another 45 in the sameorder.
Note: After the retarder has been tightened, thereshould be a
gap between the retarder and the rangehousing.
30 Nm4588890148
136136Turn the gearbox 1/4 turn.
137137Install new O-rings on the heat exchanger and therange
housing. Apply silicon grease to the O-rings.
138
T4020967
138Lift up the heat exchanger so that the narrow partsare guided
into their respective holes. Fit the securingbolts. Pull the heat
exchanger in with the upper rearscrews. Torque tighten the
bolts.
85 Nm88890149
139
T4020965
139Fit the temperature sensor for the retarder.
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Bulletin 10.2010 431 256 18 45(49)
140
T4020966
140Clamp the retarder wiring.
141
C4052785
141Install the blocking body, spring and plug for the
rangefunction.
142
T4020964
142Install the oil filter housing with a new seal and a newoil
filter. Where applicable, fit the oil cooler. Torquetighten the
bolts.
20 3 Nm88890148
143143Turn the gearbox 1/4 turn.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 46(49)
144
T4019225
144Fit a new gasket between the brake and the clutchhousing.
145
T4019226
145Add the discs alternately. Begin and end with a steeldisc
(two friction discs and three steel discs).
146
T4019286
146Fit the sleeve with a new O-ring, spring and piston.
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 47(49)
147
T4020992
147Fit the cylinder over the disc assembly and torquetighten the
screws.
45 5 Nm88890148
148148Clean the nipple threads. Fit the brake pipe. Screwthe
nuts fully on by hand. Then tighten with a socketspanner a further
3/4 turn.
149149Fit the clutch cylinder and air hose. Secure the hosewith
a clip. Torque tighten the bolts.
45 5 Nm88890148
150150Turn the gearbox 1/4 turn.
151
T4019229
151Fit the magnetic stand and dial gauge on the holder.Check the
runout in the gear wheel. The measuring tipof the dial gauge must
be 2 mm below the teeth. Themaximum permitted runout is 0.4 mm.
9999696, 9989876, 9990029
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 48(49)
152152Fit a new seal to the control housing.
153
T4018982
153Insert the dowels into the gearbox housing.
9996876
154
T4021451
154Ensure that the splitter gear clutch ring is in its
rearmostposition, the 2nd/3rd gear clutch ring is in neutral,
the1st/reverse clutch ring is in its rear position and therange
gear is set to high range (with the range shaft inits forward
position and the piston in the range cylinderin its innermost
position) and that the shift forks in thecontrol housing are
matched to the clutch rings. This isto enable the control housing
to be fitted.
155155Carefully lower the control housing so that no gear
teethare damaged. It is important for the clutch fork for
thesplitter gear to enter the clutch ring correctly. Carefullytap
the control housing down at the guide pins.
156156Remove the guide pins.
157157Install the control housing screws and torque tightenthem
diagonally.
110 10Nm88890149
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Volvo Truck Corporation Date Group No. Release PageService
Bulletin 10.2010 431 256 18 49(49)
158158Connect VCADS, calibrate the gearbox and selectperform
test to check that the gearbox is workingproperly.
159159Remove the gearbox from the overhaul stand.
160160Remove the fixture from the gearbox. Install the
valveassembly. Clamp the air hose and electrical wiring.