3. MR 328 - 04.2000 - EN B2.39
Gearbox casings
Input housing covers
Removal
- Remove the top cover (2) after removing the
attachment bolts (2a).
- Install a drip pan to collect the oil then remove the
bottom cover (3) by removing the attachment
bolts(3a).
Reinstallation
- Clean the mating surfaces on the covers and the
housing.
- CoatthematingsurfaceswithLoctite(ref.7711101
792).
- Install the covers and tighten the attachment bolts.
Main gearbox covers
Bottom cover removal
- Position a drip pan under the housing to collect the
oil.
- Drain the housing by removing the drain plug (11).
- Removethesealingbush(12).
- Remove the pipe (10) and dipstick (9).
- Extract the seal (13).
- Unscrewattachmentbolts(4a)andremovethecover
(4) and gasket (7).
- Unscrewattachmentbolts(6a)andremovethecover
(6) and seal (8).
- Remove and replace the seal (5).
(25) Range control lever
(25a) Range control attachment bolts
Gear change controls
(26) Sealing ring
(27) Needle roller bearing
(28) Lip seal
(29) Gear lever pin
(30) Adjustment shim
(31) Spring
(32) Lever
(33) Needle roller bearing
(34) Cap
(35) Set screw
Range controls
(36) Sealing ring
(37) Needle roller bearing
(38) Lip seal
(39) Range control pin
(40) Adjustment shim
(41) Spring
(42) Set screw
(43) Needle roller bearing
(44) Lever
(45) Cap
(46) Range control lever pin
(46a) Lever pin attachment bolts
(47) Guide gate (B13.29 and B13.35)
(47a) Gate attachment bolts
(48) Guide gate (B13.25)
(48a) Gate attachment bolts
Introduction
The operations described below are applicable to the three types of TEMIS gearbox. Particularities specific to
a given gearbox are indicated by the gearbox designation in italics.
Key
(1) Input housing casing
(2) Input housing top cover
(2a) Top cover attachment bolts
(3) Input housing bottom cover
(3a) Bottom cover attachment bolts
(4) Main gearbox bottom cover
(5) Seal
(6) Main gearbox bottom cover
(7) Gasket
(8) Gasket
(9) Dip-stick
(10) Pipe
(11) Drain plug
(12) Sealing ring
(13) Seal
(14) Main gearbox housing
(15) Main gearbox top cover
(16) Top cover fasteners
(17) Support
(18) Range control boot
(19) Gear lever boot
(20) Range control flanges
(20a) Flange fasteners
(21) Range control bellcrank
(22) Gear control bellcrank
(23) Stud
(23a) Split pins
(24) Gearlever
(24a) Gear lever attachment bolts
4. MR 328 - 04.2000 - EN
B2.40
Gearbox casings
Fig. 2
Fig. 3
Fig. 4
Lower cover installation
- Clean the mating surfaces on the covers (4) and (6)
and the housing (14).
- Fitnewgaskets(7)and(8)aftersmearingthemwith
oil.
- Reinstall the covers (4) and (6) tightening the
attachment bolts (4a) and (6a).
- Reinstall the pipe (10), the dipstick (9) and the drain
plug(11)afterinsertingthenewseal(13)andthenew
bush(12).
Top cover removal/installation
Removal
- Set control levers (24) and (25) to neutral.
On gearbox B13.25, select the range control to
position (3).
- Unscrew the nuts (A) attaching the control lever
support (17) (Fig. 1 and 2).
- Driveoutthesplitpins(23a)fromthelevers(21)and
(22) (Fig.1).
- Removethesupportassembly(17)(Figs. 1and2)by
extractinglevers (21)and (22) (Fig.1).
- Unscrew the attachment bolts (16) from the cover
(15)(Fig.1).
- Carefullyraisethecovertodisconnectthedrivepins
(32) and (44) from the sliding gear selectors (Fig.1).
- Remove the gear change pin in accordance
with the following sequence (Fig.1):
• Unscrew the locking pin (35).
• Slidethepin(29)recoveringthepin(32),thespring
(31), and the shim (30).
• Extractthebush(26),theseal(28)andtheneedle
roller bearing (27) (Figs. 3 and 4).
5. MR 328 - 04.2000 - EN B2.41
Gearbox casings
Fig. 5
Fig. 2
Fig. 6
Fig. 7
• Extractthecap (34) and the needle rollerbearing
(33) (Figs. 5 and 6).
• Carefullyexaminealltheparts,replaceanyfound
tobedefective,andsystematicallyreplaceallthe
seals.
- Remove the range pin in accordance with the
following sequence (Fig.1):
• Remove the gate (47) or (48) depending on the
versionbyremovingtheattachmentbolts(47a)or
(48a).
• Remove the lever pin (46) by unscrewing the
attachment bolts (46a).
• Extract the lever pin (46) from the pin (44).
• Unscrew the set screw (42).
• Slidethepin(39)recoveringthepin(44),thespring
(41), and the shim (40).
• Extractthebush(36),theseal(38)andtheneedle
roller bearing (37) (Figs. 3 and 4).
• Extractthe cap (45) and the needle rollerbearing
(43) (Figs. 5 and 6).
• Carefullyexaminealltheparts,replaceanyfound
tobedefective,andsystematicallyreplaceallthe
seals.
Installation
Clean all the mating surfaces on the housing and the
cover.
Gear control
- Smear the seals (lightly) and the needle roller
bearings with oil before assembly.
- Install the new bush (26), the needle roller bearing
(27) with Loctite followed by the new seal (28) in the
coverbore.
- Installtheneedlerollerbearing(33)withLoctiteinthe
cover bore and the cap (34).
-Lightlyoilthepin(29),theninsertitintothecoverbore,
replacing in sequence the shim (30), the spring (31)
and the pin (32).
Range control
- Before installation, smear with oil (lightly) the seals
andtheneedlerollerbearings.
- Install the new bush (36), the needle roller bearing
(37) with Loctite followed by the new seal (38) in the
coverbore.
- Reinstalltheneedlerollerbearing(43)withLoctitein
the cover bore and the cap (45).
- Lightly oil the pin (39), then insert it into the cover,
replacing sucessively the shim (40), the spring (41)
and the pin (42).
- Secure the lever pin (46) and the gate (47) or (48),
dependingontheversion,coatingthefastenerswith
Loctite at (A) and (B) (Fig. 7).
6. MR 328 - 04.2000 - EN
B2.42
Gearbox casings
Fig. 11
Fig. 9
Fig. 8
Lever adjustment
- Position the lever on the pin so that it is aligned with
theselectorandtightenthesetscrews(35)and(42)
(Fig. 1).
Note: Each set screw should fall in the centre of
the cup in the corrsponding pins in order to leave
a slight gap in the centre.
- Correctly position the gear selectors (Fig. 8):
ForgearboxesB13.29andB13.35:
• gearlever:inneutral
• rangelever:inneutral
ForgearboxB13.25:
• gearlever:inneutral
• 'Road/field'rangelever:onfield
• 'Slow'rangelever:in'Road/field'position
• 'Crawler'selector:inneutral.
- Install the support together with the control levers
(17).
- Temporarily locate the cover on the housing.
- Check the lever (32) is positioned opposite the gear
selector (V) (Fig. 9) and that the lever pin (46) is
positionedoppositethe'road/field'selector(G).
For gearbox B13.25, the lever pin (46) must also be
oppositetheslowandcrawlerrangecontrolselector
(R).
- Operatethecontrolleversandcheckcorrectselector
of the gears, in particular those for the slow and
crawlerrange.
- Finally, install the cover attachment bolts, with
jointing compound ref.: MPR 7711101792 and
tighten the bolts to 4 daN.m.
- If necessary, adjust the selector forks; refer to the
correspondingchapter.
7. MR 328 - 04.2000 - EN B2.43
SELECTER RAILS AND FORKS
B13.25 - B13.29 - B13.35
8. MR 328 - 04.2000 - EN
B2.44
Selecter rails and forks
Fig. 1
Introduction
Gearbox B13.25 controls (Fig. 1)
The gear and range controls are mechanical. They are operated via three levers located in the cab:
- One 5-position gear-lever for gears 1, 2, 3 and 4 + neutral,
- One 5-position range control lever for the Road/field/slow/crawler ranges: 1, 2, 3, 4 and N (Neutral),
Note: This lever has two intermediate positions which correspond to intermediate neutral positions.
- One 3-position for the reverser, on the LH side of the steering wheel: Forward / Reverse + Neutral
Note: The maintenance operations on the selecter rails and forks for the power take off control are
covered in the 'Power take off' chapter.
Reverser
Reverser
Ranges
Ranges
Ranges
Gears
Gears
9. MR 328 - 04.2000 - EN B2.45
Selecter rails and forks
Gearbox B13.29 controls (Fig. 2)
The gear and range controls are mechanical. They are operated via four levers located in the cab:
- One 5-position lever for gears 1, 2, 3 and 4 + neutral,
- One 3-position range lever for the road/field ranges: I, II and N (Neutral),
- One 3-position lever for the reverser, on the LH side of the steering wheel: Forward/Reverse + Neutral,
- One 3-position lever for the doubler, on the RH side of the steering wheel: speeds 1, 2 + Neutral.
Fig. 2
Reverser
Doubler
Ranges
Gears
Doubler
Gears
10. MR 328 - 04.2000 - EN
B2.46
Selecter rails and forks
Gearbox B13.35 controls
Key
(1) Fork shaft
(2) Fork
(3) Set and locking screw
(4) Liner
(5) O-rings
(6) Sensor probe
(7) Position sensor
(8) Locking pin
(9) Spring
(10) O-rings
(11) Stop ring
(12) O-rings
(A) Supply channel (for forward motion)
(B) Supply channel (for reverse motion)
Fig. 3
Section AA
11. MR 328 - 04.2000 - EN B2.47
Selecter rails and forks
Fig. 2
Gearbox B13.35 (Fig. 3)
The gear and road/field range controls are mechanical. They are operated via two levers located in the cab.:
- One 5-position gear lever for gears 1, 2, 3 and 4 + neutral,
- One 3-position range lever for the road/field ranges: I, II and N (Neutral),
Thetripler/reversercontrolsareelectro-hydraulic,andareoperatedvia:
- One 4-position lever for the reverser, located on the LH side and at the top of the steering wheel: declutched,
forward,reverseandneutral.
- Oneelectricalpush-buttonlocatedonthegearlever.Thisswitchmovesupordownoneofthetriplerspeeds.
Refertothe'TRACTONIC'inputhousingchapter.
Note: The synchronisers are controlled by hydraulic pressure exerted on each end of the selecter rails.
Removal/installation of the main gearbox selecter rails and forks
Note: The operations described below for the removal/installation of the guide rods and forks are
applicable to all three types of gearbox, apart from the selecter rails and forks for the slow and crawler
ranges on gearbox B13.25.
Key to the exploded view (Fig. 4)
(1) 1st/2nd gear fork
(2) 1st/2nd gear fork locking screw
(3) 1st/2nd gear selecter rail
(4) 2nd/3rd gear fork
(5) 2nd/3rd gear fork locking screw
(6) 2nd/3rd gear selecter rail
(7) 1st/2nd gear fork selector
(8) 1st/2nd gear fork selector locking screw
(9) 2nd/3rd gear fork selector
(10) 2nd/3rd gear fork selector locking screw
(11) Spring
(12) Ball
(13) Pin
(14) Push-button
(14a) Switch
(15) Ball
(16) Needle
(17) 1st Road/field range fork
(18) 2nd Road/field range fork
(19) Road/field range selecter rail
(20) Road/field range selector
(21) Selector locking screw
(22) Fork locking screw
(23) Washers
(24) Spring
(25) Ball
Gearbox B13.25 specific parts
(26) Low speed range fork
(27) Low speed range fork locking screw
(28) Crawler speed range fork
(29) Crawler speed range fork locking screw
(30) Low speed range selector
(31) Low speed range selector locking screw
(32) Crawler speed range selector
(33) Crawler speed range selector locking screw
(34) Low speed range selecter rail
(35) Crawler speed range selecter rail
(36) Plug
(37) Sealing bush
(38) Rod
(39) Spring
(40) Ball
(41) Plug
(42) Sealing bush
(43) Rod
(44) Spring
(45) Ball
(46) Pin
12. MR 328 - 04.2000 - EN
B2.48
Selecter rails and forks
Exploded view
Fig. 4
Specific to
gearbox B13.25
13. MR 328 - 04.2000 - EN B2.49
Selecter rails and forks
Preliminary steps
- Removetheinputhousing.
- Disconnect the rear axle from the main gearbox.
Refer to the corresponding chapters.
Removal/installation of the
selecter rails and forks for 1st,
2nd , 3rd and 4th gears.
- Set the gear lever to neutral.
- Remove the fasteners from the main gearbox top
cover.
- Lift the complete cover and remove it from the
housing (Fig. 5).
- Mark the positions of selectors (7) and (9).
- Loosenthebolts(8)and(10)onselectors(7)and(9)
(Figs. 4 and 6).
- Remove the locking wire from bolts (2) and (5) on
forks (1) and (4) (Figs. 4 and 6).
- Loosenthebolts(2)and(5)onforks(1)and(4)(Figs.
4 and 6).
- Disconnect and remove the switch (14a) on the RH
side of the housing (Fig. 7).
- Usingtool8540,extractthepush-button(14)andthe
ball (15) (Fig. 7).
- Drive out the selecter rails (3) and (6) one at a time,
recovering the forks and selectors.
During extraction, the locking balls (12) will
be expelled by the springs (11) (Fig. 7). Keep a hand
over the hole to catch them.
- Recover the balls (12) and the springs (12).
- Extract the needle (16) from the rod (3).
- If necessary, extract the pin (13) (Fig. 8).
Fig. 5
Fig. 6
Fig. 11Fig. 7
Fig. 8
14. MR 328 - 04.2000 - EN
B2.50
Selecter rails and forks
Fig. 9
Installation
- Lubricate the selecter rails with oil.
- Replace the pin (13) in its housing.
- Inserttheneedle(16)inthecorrespondingholeinthe
rod(3).
- Insert the selecter rails (3) and (6) in the
corresponding bores in the housing, inserting the
springs(11)andtheballs(12)intheircorresponding
holes. Then install the forks (4) and (1) inserting the
selectors (7) and (10).
- Position the selecter rails so as to obtain the neutral
position at the rod cups (centre notch).
- Install the ball (15), the push-button (14) and the
microswitch (14a) without tightening.
Forkadjustments
- Position the forks and sliding gears in the neutral
(centre)position.
- Position the forks and sliding gears in the forward
engaged position (gears 1 and 3).
- Position the sliding gears against their stops by
hand.
- Position the selecter rails in the corresponding
locked position.
- Lock the forks with their set screws.
Maintainingthetheslidinggearsagainsttheirstops,
check the clearance is the same on each side of the
fork in the groove on each sliding gear.
- Position the sliding gears in the opposite engaged
position and check the same clearance.
Note: The presence of a free plate on the selecter
rails enables the clearance to be distributed
betweenthetwoengagedpositions.
- Finally, reposition the sliding gears in the neutral
position. Check the forks are not under strain in the
grooveoneachslidinggear.
- Wire-lock the fork bolts.
- Screw the bolts into the selectors (7) and (9).
- Position the selectors in accordance with the marks
applied prior to removal, adjust the clearance as
shown in Fig. 9, then tighten the bolts (8) and (10).
- Tighten the switch (14a).
15. MR 328 - 04.2000 - EN B2.51
Selecter rails and forks
B13.29 and B13.35 gearboxes
Removal/installation of the
selecter rails and forks for the
road/field range
- Set the range lever to neutral.
- Remove the attachment fasteners from the main
gearboxtopcover.
- Raise the cover complete and remove it from the
housing (Fig. 5).
- Mark the position of the selector (20) (Fig. 10).
- Loosen the bolt (21) on the selector (20) (Fig. 4).
- Loosenthebolts(22) ontheforks(17) and(18) (Fig.
10).
- Slide the selecter rail (19) to the back of the housing
and recover the fork (17) (Fig. 11).
During extraction, the locking ball (25) will
be ejected by the spring (24) (Fig. 12). Keep a hand
over the hole to catch it.
- Completelyremovetheselecterrail (19) recovering
the fork (18) and the selector (20) (Fig. 11).
- Extract the spring (24) (Fig. 12).
Installation
- Lightly oil the guide rod.
- Installtheguiderod(19)inthecorrespondingborein
thehousing,successivelyinsertingthefork(18)and
the selector (20).
- Install the spring (24) and the ball (25) in the bottom
of the hole, then complete the sliding of the selecter
rail so as to position the ball beneath the rod, then
insert the fork (17) on the rod.
Adjustment
- Position the sliding gears in the 'neutral' position.
- Position the selecter rail (19) in the corresponding
locked position.
- Position the forks (17) and (18) such that the tip of
each bolt falls in each of the cup holes in the guide
rod then tighten and lock the bolts.
Note: The lateral clearance on each side of the
bolt should be the same.
- Positiontheselector(20)inthepositionmarkedprior
toremovalandtightenandlockthebolt(21).Thebolt
shouldfallinthecupholemachinedintheguiderod.
- Install the cover on the gearbox (refer to the
correspondingchapter).
Fig. 10
Fig. 11
Fig. 12
16. MR 328 - 04.2000 - EN
B2.52
Selecter rails and forks
Fig. 10a
Fig. 11a
Fig. 12a
B13.25 gearbox
Removal/installation of the
selecter rails and forks for the
road/field range
- Position the range lever in the 'field' position.
- Remove the main gearbox top cover attachment
bolts.
- Lift the complete cover and remove it from the
housing (Fig. 5).
- Mark the position of the selector (20) (Fig. 10a).
- Loosen the bolt (21) on the selector (20) (Fig. 4).
- Loosenthebolts(22) ontheforks(17) and(18) (Fig.
10a).
- Slide the selecter rail (19) to the back of the housing
and recover the fork (17) (Fig. 11a).
During extraction, the locking ball (25) will
be ejected by the spring (24) (Fig. 12a). Keep a
hand over the hole in order to catch it.
- Completelyremovetheselecterrail (19) recovering
the fork (18) and the selector (20) (Fig. 11a).
- Extract the spring (24) (Fig. 12a).
Installation
- Lightly oil the selecter rail.
- Installtheselecterrail(19)inthecorrespondingbore
in the housing, successively inserting the fork (18)
and the selector (20).
- Install the spring (24) and the ball (25) in the bottom
of the hole, then complete sliding of the selecter rail
topositiontheballbeneaththerodandinsertthefork
(17) on the rod.
Adjustment
- Position the sliding gears in the 'field' position.
- Position the selecter rail (19) in the corresponding
locked position.
- Positiontheforks(17)and(18)sothetipofeachbolt
falls in each of the cup holes in the guide rod, then
tighten and lock the bolts.
Note: The lateral clearance should be the same
on each side of the bolt.
- Positiontheselector(20)inthepositionmarkedprior
to removal (21) and lock it. The bolt should fall in the
cup hole machined in the guide rod.
17. MR 328 - 04.2000 - EN B2.53
Selecter rails and forks
Fig. 13
Fig. 14
Fig. 15
B13.25 gearbox
Removal/installation of the
selecter rails and forks for the
slow/crawler range
- Position the range lever in the 'field' position.
- Remove the attachment fasteners from the main
gearboxtopcover.
- Raise the cover complete and remove it from the
housing (Fig. 5).
- Removethelockingwirefromthebolts(27)and(28).
- Markthepositionoftheselectors (30) and (32)(Fig.
13).
- Loosenthebolts(31)ontheselector(30)(Fig.4and
13).
- Loosenthebolt(33)onselector(32)(Figs.4and13).
- Loosen the bolt (29) on fork (28) (Fig. 13).
- Loosen the bolt (27) on fork (26) (Fig. 13).
- Loosen the plugs (36) and (41) (Figs. 4 and 14),
withoutremovingthem.
- Slide the selecter rail (35) to the front of the housing
and recover the selector (32) and the fork (28) (Fig.
13).
- Slide the selecter rail (34) to the front of the housing
and recover the selector (30) and the fork (26) (Fig.
13).
- Remove the plugs (36) and (41) with seals (37) and
(42) (Fig. 14).
- Usingtool 8540,extracttherod(38),thespring (39),
theball(40)(Fig.14).Extracttherod(43),thespring
(44) and the ball (45).
- Extract the pin (46) (Fig. 15).
- Carefullyexamineallthepartsandreplaceanyfound
to be defective. Systematically replace seals (37)
and(32).
Installation
- Lightly oil the selecter rails.
- Install the pin (46).
- Installtheselecterrail(35)inthecorrespondingbore
in the housing, successively inserting the fork (28)
and the selector (32).
- Install the selecter rail (34) into the corresponding
bore in the housing, inserting successively the fork
(26) and the selector (30).
- Installtheball(45),thespring(44)andtherod(43)in
thebottomofthecorrespondinghole.Installtheplug
(41) with a new seal (42), without tightening it.
- Installtheball(40),thespring(39)andtherod(38)in
thebottomofthecorrespondinghole.Installtheplug
(36) with a new seal (37), without tightening it.
Slow range Crawler range
18. MR 328 - 04.2000 - EN
B2.54
Selecter rails and forks
Adjustment
- Positiontheslowrangeslidinggear(BL)inthe'Road/
field' position (fully forward) (Fig. 16).
- Position the setting shim 8581 (0.3-mm thick) in the
front groove of the primary shaft (AP) and push the
sliding gear against the shim (Fig. 16).
- Position the selecter rail (34) in the corresponding
locked position.
- Tighten the bolt (27) on the fork (26) to 3 daN.m.
- Position the sliding gear in the slow position (pulled
back) and check the positive contact between the
sliding gear and the stop.
- Tightenthelock.Theselecterrailandthegearshould
be locked (Fig. 17).
- Again position the slow range sliding gear on the
'Road/field'position(fullyforward).
- Positionthecrawlerrangeslidinggearinthe'neutral'
position (fully back).
- Position the selecter rail (35) in the corresponding
locked position.
- Positiontheforks(26)and(27)sothetipofeachbolt
falls into each of the cup holes in the corresponding
selecter rail, then tighten and lock the set screws.
Note: The lateral clearance should be the same
on each side of the fork.
- Position the selectors (30) and (32) in the position
marked prior to removal, then tighten and lock the
bolts(31)and(33).Theboltshouldfallinthecuphole
machined in the corresponding selecter rail.
- Temporarily fit the gearbox cover and check the
correct operation of the forks (refer to the
correspondingchapter).
- Oncetheadjustmentiscomplete,wire-lockthebolts
andforks.
- Tighten the plugs (36) and (41).
Fig. 16
Fig. 17
19. MR 328 - 04.2000 - EN B2.55
Selecter rails and forks
B13.25 - B13.29 input housings
Note: The description of the reverser is common to both types of gearbox. Gearbox B13.29 additionally
includes a range doubler. For the slow and crawler ranges on gearbox B13.25, refer to the main gearbox
section.
Removal/installation of the reverser selecter rails and forks (B13.25 and B13.29)
Key
(1) Reverserfork
(2) Reverser selecter rail
(3) Reverser selector
(4) Selector locking bolt
(5) Reverser fork locking bolt
(6) Lock
(7) Pin
(8) Spring
(9) Sealing bush
(10) Plug
(11) Reverser control lever
(12) Outer stop ring
(13) Washer
(14) Needle roller bearing
(15) Lip seal
(16) Washer
(17) Drivelever
(18) Pin locking bolt
(57) Reverser control cable
Removal (Fig. 18):
- Disconnectthecontrolcable(57)fromthelever(11).
- Extract the stop ring (12).
- Loosen the bolt (18) on the lever (17).
- Removethecontrollever(11)recoveringthelever(17)
andwashers (16) and (13).
- Extract the seal (15) and the needle roller bearing
(14)
- Unscrew the plug (10), extract the seal (9).
- Usingtheappropriatetool,removethespring(8),the
pin (7) and the lock (6) from the locking system.
- Remove the locking wire from the fork (5).
- Loosen the bolt (4) on the selector (3).
- Slidetheguiderod(2)torecovertheselector(3)and
the fork (1).
- Carefully examine all the parts and replace any
found to be defective; systematically replace the
seals.
Installation of the rod and the fork
- Lightly oil the selecter rail.
- Locate the fork (1) on the reverser sliding gear.
- Inserttheselecterrail inthecorrespondingborein
the housing, then in the fork bore, then in the
selector bore (3).
- Installthelock(6),thepin(7),thespring(8)thenew
seal (9) and the plug (10) without tightening.
Fig. 18
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21. MR 328 - 04.2000 - EN
B2.56
Selecter rails and forks
Forkadjustment
- Positionthefork(1)andtheslidinggearintheneutral
(centre)position.
- Position the fork (1) and the sliding gear forwards in
theengagedposition.
- Push the sliding gear against its stop by hand.
- Position the selecter rail (2) in the corresponding
locked position.
- Lock the fork (1) with the set screw (5).
Maintaining the sliding gear in contact with its stop,
check the clearance is the same on each side of the
fork pads in the sliding gear groove.
- Position the sliding gear in the opposite engaged
position and check the same clearance.
Note:Thepresenceofafreeplayontheguiderod
enablestheclearancetobebalancedbetweenthe
twoengagedpositions.
- Finally reposition the sliding gear in the neutral
position. Check the fork is not under strain in the
slidinggeargroove.
- Positiontheselector(3)sothebolt(4)fallsinthecup
hole machined in the rod.
- Lockthesetscrewwhilstmaintainingaslightlateral
and symmetrical clearance.
- After adjustment, wire lock the set screw (5) on the
fork.
- Tightentheplug (10).
Control lever installation
- Lightly oil the needle roller bearings.
- Install the needle roller bearings (14) in the housing
bore with Loctite Scelbloc.
- Install a new seal (15).
- Installthecontrolleverinthehousingbore,inserting
washers (13) and (16) and finally the lever (17),
positioning it simultaneously in the selector (3).
Note:Thelateralclearanceshouldbebetween0.5
and 1 mm.
- Install the stop ring (12).
- Adjustthelever(17)andtightenthelockingbolt(18)
whilst maintaining a slight symmetrical lateral clea-
rance.
- Reconnect the control cable (57) to the lever (11).
Removal/installation of the reverser selecter rails and forks (B13.29 only)
Key
(20) Doubler fork
(21) Doubler fork locking bolt
(22) Doubler selecter rail
(23) Lock
(24) Rod
(25) Spring
(26) Pin
(27) Sealing bush
(28) Plug
(29) Doubler control lever
(30) Outer stop ring
(31) Washer
(32) Needle roller bearing
(33) Lip seal
(34) Washer
(35) Drivelever
(36) Lever locking bolt
(47) Doubler control cable
Fig. 19
22. MR 328 - 04.2000 - EN B2.57
Selecter rails and forks
Removal (Fig. 19):
- Disconnectthecontrolcable(47)fromthelever(29).
- Extract the stop ring (30).
- Loosen the bolt (36) on the lever (35).
- Remove the control lever (29) recovering the drive
lever (35) andwashers(34) and(31).
- Extract the seal (33) and the needle roller bearings
(32)
- Unscrew the plug (28), extract the seal (27).
- Using the appropriate tool, remove the pin (26), the
spring (25), the rod (24) and the lock (23) from the
locking system.
- Remove the locking wire (21) from the fork.
- Loosen the bolt (21) on the fork (20).
- Slide the selecter rail (22) and the fork (20).
- Carefullyexamineallthepartsandreplaceanyfound
to be defective ; systematically replace the seals.
Installation of the selecter rail and the fork
- Lightly oil the selecter rail.
- Locate the fork (20) on the doubler sliding gear.
- Insert the selecter rail in the corresponding bore in
the housing, then in the fork bore.
- Install the lock (23), the rod (24), the spring (25) the
pin (26), the new seal (27) and the plug (28) without
tightening.
Forkadjustment
- Position the fork (20) and the sliding gear in the
neutralposition(centre).
- Position the fork (20) and the sliding gear in the
engagedpositiontowardsthefront.
- Push the sliding gear against its stop by hand.
- Position the selecter rail (22) in the corresponding
locked position.
- Lock the fork (20) with the set screws (21).
Whilst maintaining the sliding gear against its stop,
check the presence of an equal clearance on each
side of the fork pads in the sliding gear groove.
- Position the sliding gear in the opposite engaged
position and check the same clearance.
Note: The presence of a free play on the selecter
rail enables the clearance to be balanced
betweenthetwoengagedpositions.
- Finally reposition the sliding gear in the neutral
position.Checkthattheforkisnotunderstraininthe
slidinggeargroove.
- Positiontheselector(35) suchthatthebolt (36)falls
in the cup hole machined in the shaft.
- Lockthesetscrew,maintainingaslightsymmetrical
andlateralclearance.
- Afteradjustment,wirelockthesetscrews(21)onthe
fork.
- Tightentheplug (28).
Control lever installation
- Lightly oil the needle roller bearings.
- Reinstalltheneedlerollerbearings (32)intheirbore
in the housing with Scelbloc Loctite .
- Install the new seal (33).
- Installthecontrolleverinthehousingbore,inserting
the washers (31) and (34) and finally the drive lever
(35),positioningitsimultaneouslyintheforkselector
(20).
Note:Thelateralclearanceshouldbebetween0.5
and 1 mm.
- Install the stop ring (30).
- Adjustthedrivelever(35)andtightenthelockingbolt
(36) whilst maintaining a slight symmetrical and
lateralclearance.
- Reconnect the control cable (47) to the lever (29).
23. MR 328 - 04.2000 - EN
B2.58
Selecter rails and forks
Control lever adjustment (B13.25 and B13.29)
The procedure is identical for both controls.
- Act on the control cable adjustment nut in order to achieve the required length of threaded rod.
- Tighten the locknuts.
Reverser
(50) Reverser control lever
(51) Ball
(52) Outer stop ring
(53) Link
(54) Yoke
(55) Support bracket
(56) Blanking plate
(57) Control cable
(58) Support bracket
Doubler (B13.29 only)
(40) Doubler control lever
(41) Ball
(42) Outer stop ring
(43) Link
(44) Yoke
(45) Support bracket
(46) Blanking plate
(47) Control cable
(48) Support bracket
(49) Support bracket
Fig. 20
Fig. 21
