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Section F
130 - 4
PS 760 - Forward/Input & Reverser 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.
Take care when handling disc spring assemblies 16 to avoid
marking or damage, which could result in stress cracking. If
in doubt fit a new disc spring.
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 new 'O' rings 23 and 22. Lubricate the piston 21 with
oil and press fully into bore of clutch housing.
2
Fit the oil baffle 20, piston spring 19, make sure the
spring seats in the piston.
3
Fit the spring retaining plate 18.
4
Compress the spring and secure with circlip 17.
5
Fit the disc spring assembly 16. Make sure that the disc
spring is fitted with the teeth towards the clutch pack.
Make sure the teeth are not aligned with the lubrication
slots in the housing.
6
Fit one counter plate 15, followed by one friction plate
14. Continue fitting alternate counter and friction plates,
finishing with a friction plate.
*
7
Fit the pressure end plate 13. 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 12 at
this stage.
8
Fit the clutch friction/counter plates retaining circlip 11.
9803/3280
Transmission
Powershift Gearbox
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9
Using a dial test indicator as shown, measure the end
float of the pressure end plate 13, which should be 1.90
to 2.50 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 13, with either a
shim 12 or an extra counter plate 15 between the
retaining circlip 11 and pressure end plate 12.
Use an airline to check the operation of the clutch.
10
Fit thick and thin thrust washers 8 and 10, and thrust
bearing 9.
11
Carefully align the teeth of the clutch plates using a thin
rod (or screwdriver) and fit the gear and splined hub 6.
12
Fit needle roller bearing 7.
13
Fit thrust bearing 4 and thin thrust washer 5.
14
Smear the clutch end bearing with gearbox oil and
press the gear 3 and bearing 2 onto the shaft.
15
Fit piston ring seals 1, refer to Piston Ring Seals -
Fitting Procedure. The input shaft does not have
piston ring seals fitted at this end of the shaft.
16
To assemble the opposite clutch repeat steps 1 to 10.
17
Carefully align the teeth of the clutch plates using a thin
rod (or screwdriver) and fit the gear and splined hub 29.
18
Fit needle roller bearing 30.
19
Fit thrust bearing 27 and thick and thin thrust washers
26 and 28.
20
Smear the clutch end bearing with gearbox oil and
press bearing 25 onto the shaft.
21
Fit piston ring seal 24, refer to Piston Ring Seals -
Fitting Procedure. The input shaft has four piston ring
seals fitted at this end of the shaft.
Section F
130 - 4
S217590
Issue 2*
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