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Section F
132 - 4
PS760 - Mainshaft Clutch - Assembly
Visually inspect the friction and counter plates:
Counter plates - light scoring/polishing is permissible,
plates that are not flat, worn or heavily marked or scored
must be replaced with a new set.
Friction plates - the cross hatching should be clearly
visible, plates that are not flat, have friction material
damage or scoring must be replaced with a new set.
DO NOT mix old and new plates, if a plate is damaged/worn
fit a complete new set.
Needle roller bearings should slide into position freely, do not
bend or distort the cage to fit. If the cage has been distorted
fit new bearings.
Note: The piston incorporates a small check valve. Visually
inspect the piston to ensure the ball is in place and that the
seat is free from contamination. If necessary clean the valve
by blowing through with an air line. DO NOT use a wire rod
(or screwdriver) as damage to the valve seat could occur.
1
Fit a new 'O' ring 20.
2
Press the clutch housing 19 onto the shaft spline and fit
circlip 18.
3
Fit a new 'O' rings 17 and 16. Lubricate the piston 15
with oil and press fully into bore of clutch housing.
4
Fit oil baffle 14, piston spring 13, make sure the spring
seats in the piston.
5
Fit the spring retaining plate 12. The 4 - speed
transmissions have a different shaped spring retaining
plate fitted.
6
Compress the spring and secure with circlip 11.
7
Fit one counter plate 8 followed by one friction plate 9.
Continue fitting alternate counter and friction plates,
finishing with a friction plate.
*
8
Fit pressure end plate 7. Make sure that the chamfered
face is fitted facing the clutch pack as shown at A.
Make sure the teeth are not aligned with the lubrication
slots in the housing. Do not fit shim 7 at this stage.
Note: A spring disc is not fitted in this clutch pack.
9
Fit the clutch friction/counter plate retaining circlip 6.
10
Using a dial test indicator as shown, measure the end
float of the pressure end plate 7, which should be 1.9 to
2.5 mm (0.075 to 0.098 in).
If it is necessary to adjust the end float to bring it within
tolerance, there is a choice of fitting a 6.0mm (0.23in) or
6.5mm (0.25in) thick pressure end plate 7, with either a
shim 8 or an extra counter plate 10 between the
retaining circlip 6 and pressure end plate 7.
9803/3280
Transmission
Powershift Gearbox
Purchased from www.WorkshopManuals.co.uk
Use an airline to check the operation of the clutch.
11
Smear the taper roller bearing 5 with gearbox oil and
press the bearing onto the shaft.
12
At the opposite end press gears 3 and 4 onto shaft
spline. Make sure that the gears are fitted the correct
way round.
13
Smear the taper roller bearing 2 with gearbox oil
press the bearing onto the shaft.
14
Fit piston ring seals 1, refer to Piston Ring Seals -
Fitting Procedure.
217590
Section F
132 - 4
and
Issue 2*
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