130 - 2
Section F
9803/3280
Section F
130 - 2
Issue 1
Powershift Gearbox
Note:
The illustration shows a reverser shaft assembly for
the 6 - speed transmission. The input shaft assembly has
some small differences. An explanation of the differences will
be given as they occure in the procedure. The input and
reverser shaft assemblies for the 6 - speed transmission 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
. The input shaft
does not have piston ring seals fitted at this end of the
shaft.
Note:
If the piston ring seals are excessively worn then
check for burrs or damage on the shaft grooves. If necessary
remove burrs with a fine grade abrasion paper and oil.
2
Remove the clutch end bearing
2
and gear
3
, using a
puller or press.
3
Remove the thrust bearing
4
and thin thrust washer
5
.
4
Withdraw the gear and splined hub
6
with the needle
roller bearing
7
.
5
Remove thrust bearing
9
and thick and thin thrust
washers
8
and
10
.
6
Remove the friction/counter plates retaining circlip
11
.
7
Remove pressure end plate
13
and shim
12
, if fitted.
8
Remove the friction plates
14
and counter plates
15
.
Keep them together in sets, DO NOT mix the plates with
those from other clutches.
9
Remove disc spring assembly
16
.
10
Position clutch assembly in a suitable press, with a cut
away tube compress the piston spring then remove
circlip
17
.
PS 760 - Forward/Input & Reverser Clutch - Dismantling
11
Lift off spring retaining plate
18
.
12
Remove spring
19
and oil baffle
20
.
13
Turn the assembly over and knock the clutch shaft on a
piece of aluminium (or wood) to loosen the piston
21
.
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.
14
Remove the piston
21
. Remove and discard the piston
‘O’ ring
22
and shaft ‘O’ ring
23
.
15
To dismantle the opposite clutch, carefully remove
piston ring seal
24
. The input shaft has four piston ring
seals fitted at this end of the shaft.
16
Loosen the clutch end bearing
25
and remove using a
puller.
17
Remove thrust bearing
27
and thick and thin thru
washers
26
and
28
.
18
Withdraw the gear and splined hub
29
with the need
roller bearing
30
.
19
Repeat steps
5
to
14
to dismantle the clutch assembl
A401360
17