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Section F
131 - 2
PS760 - Layshaft Clutch - Dismantling
Note: The illustration shows a layshaft assembly for a 6 -
speed transmission. The layshaft assembly for a 4 - speed
transmission has some small differences. An explanation of
the differences will be given as they occure in the procedure.
1
Carefully remove piston ring seals 1.
Note: If the piston ring seals are excessively worn then
check for burrs or damage on shaft grooves. If necessary
remove burrs with a fine grade abrasion paper and oil.
2
Remove taper roller bearing 2 using a suitable puller or
press.
3
Remove circlip 3 and withdraw the 4 wheel drive
transfer gear 4. Make a note which way round the gear
is fitted for assembly. The 2 wheel drive machines have
a spacer fitted instead of a gear.
4
Withdraw the gear and splined hub 5 together with thin
thrust washers 6 and thrust bearing 7.
5
Remove the two needle roller bearing assemblies 8.
4-speed transmissions have only one needle roller
bearing fitted.
6
Remove the thin thrust washer 9, thrust bearing 10, thin
*
thrust washer 9A (if fitted) and thick thrust washer 11.
7
If end bearing 12 is to be removed it must be renewed.
Remove the bearing using puller. Discard the bearing.
Note: This bearing would not normally be removed unless it
was damaged. If a collet tool is not available, then it is
permissible to use standard bearing puller, although damage
to the bearing cage may be incurred which will require a new
bearing.
8
Remove the clutch friction/counter plates retaining
circlip 13.
9
Remove pressure end plate 14 and shim 15, if fitted.
10
Remove the clutch friction plates 16 and counter plates
17. Keep them together in sets, DO NOT mix the plates
with those from other clutches.
11
Position clutch assembly in a suitable press, with a cut
away tube compress the piston spring as shown, then
remove circlip 18.
9803/3280
Transmission
Powershift Gearbox
Purchased from www.WorkshopManuals.co.uk
12
Lift off spring retaining plate 19.
13
Remove the spring 20 and oil baffle 21.
14
Turn the assembly over and knock the clutch shaft on a
piece of aluminium (or wood) to loosen the piston 22.
Note: If the piston does not loosen when the clutch shaft is
knocked on aluminium, then hand pump air down the shaft
oil inlet hole.
15
Remove the piston 22. Remove and discard the piston
'O' ring 23 and shaft 'O' ring 24.
18
Section F
131 - 2
A401360
Issue 2*
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