132 - 2
Section F
9803/3280
Section F
132 - 2
Issue 1
Powershift Gearbox
Note:
The illustration shows a mainshaft assembly for a 6 -
speed transmission. The mainshaft assembly for a 4 - speed
transmission has some small differences. An explanation of
the differences will be given as they occure in the procedure.
The mainshaft assemblies for the 6 - speed and the 4 -
speed transmission are the same basic construction, except
the 4 - speed transmission have fewer friction/ counter
plates.
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 puller or press.
3
Withdraw the gears
3
and
4
. Make a note which way
round the gears are fitted for assembly.
4
At the opposite end, use a suitable puller to remove the
taper roller bearing
5
.
5
Remove the clutch friction/counter plates retaining
circlip
6
.
6
Remove the pressure end plate
7
and shim
8
, if fitted.
7
Remove the clutch friction plates
9
and counter plates
10
. Keep them together in sets, DO NOT mix the plates
with those from other clutches.
8
Position clutch assembly in a suitable press, with a cut
away tube compress the piston spring as shown, then
remove circlip
11
.
PS760 - Mainshaft Clutch - Dismantling
9
Lif t o f f sp ring ret aining p lat e
12
. The 4 - sp eed
transmissions have a different shaped spring retaining
plate fitted.
10
Remove the spring
13
and oil baffle
14
.
11
Turn the assembly over and knock the clutch shaft on a
piece of aluminium (or wood) to loosen the piston
15
.
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.
12
Remove the piston
15
. Remove and discard the piston
‘O’ ring
16
and shaft ‘O’ ring
17
.
13
Remove circlip
18
and withdraw the clutch housing
19
from the shaft. Remove and discard the ‘O’ ring
20
.
A401360
11
