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Triumph TR6 Clutch & Hydraulics |
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Page Contents
RH Steering Models up to body no. 50910CP (0.75" bore) LH Steering Models up to body no. 50910CP/52951CC (0.75" bore) RH Steering Models body no. 50911CP on (0.70" bore) LH Steering Models body no. 50911CP/52952CC on (0.70" bore) Clutch Mounting, Pedal & Fittings
RH Steering LH Steering (uses 46 & 47 also) ©Rimmer Bros Ltd - Registered in England No. 2155394. VAT No. GB 352 8473 40.
Clutch Assembly
Operating Mechanism
Slave Cylinder
Master Cylinder
Clutch Mounting, Pedal & Fittings
Clutch Pipework
Consumables
Two different manufacturers supplied clutch assemblies for production line fitment to the TR6s. Debate still rages on the pros and cons to be had from using either a Borg and Beck or a Laycock clutch; the only indisputable fact is that the are completely interchangeable if fitted as functional sets of cover and plate.
One limiting factor must be considered when changing allegiances from one manufacturer to the other; the Borg and Beck cover assembly requires longer screws to attach it to the flywheel than those used to fit the Laycock cover (this is because the mounting flange on the Laycock cover is thinner than that on th Borg and Beck item). On the other hand, the length of the screw thread must not exceed 3/4" (for the Borg and Beck clutch) or 5/8" (for the Laycock clutch), otherwise the screws may bottom in the tapped hole in the flywheel, leaving the clutch cover loose.
1. 
Clutch Kit (3 piece) - (1) - RR1114
Borg and Beck.
2. Clutch Cover Assembly - (1) - GCC228
Borg and Beck.
3. Clutch Driven Plate - (1) - GCP143
Borg and Beck.
4. Clutch Cover Assembly - (1) - GCC139
Laycock.
5. Clutch Driven Plate - (1) - GCP214
Laycock.
6. Release Bearing - (1) - GRB211
All applications.
7. Screw (clutch cover, 3/4") - (6) - HU856
Borg and Beck clutches. Fit in sets only.
Screw (clutch cover, 5/8") - (6) - HU855
Laycock clutches. Fit in sets only.
NOTE: We recommend 'Loctiting' these screws. Adhere to the recommended 20ft/lbs fixing torque.
8. Washer (locking) - (6) - WL208
Always replace these.
9. Dowel Pin (locating cover on flywheel) - (3) - DP411
To commission no. CR5000/CF12500.
Dowel (locating, clutch to flywheel) - (3) - UKC1937
From commission no. CR5001/CF12501.
10. Clutch Alignment Tool - (1) - RX1389
Probably the trickiest aspect of clutch replacement is the fact that the clutch driven plate must be exactly centred on the flywheel when the clutch cover is fastened over it. This must be done to ensure that the gearbox input shaft mates correctly with both the driven plate and the spigot bush in the tail of the crankshaft. The result of the clutch plate misalignment is the gearbox's stubborn inability to clamp up flush to the back of the engine when reassembly is attempted.
A clutch alignment tool will take the guesswork out of trying to centre the clutch driven plate. Most alignment tools are of a universal type; the item listed here is manufactured as a plastic replica of a TR6 gearbox input shaft - there is no more accurate a way of aligning your clutch (other than using a real, 'spare', input shaft!).
11. Grease (copper, anti-seize, 10oz tube) - (ar) - RX1345
Having secured a new clutch to the flywheel, and before refitting the gearbox to the engine, a very light coating of copper grease should be applied to the splines (having wire brushed and cleaned them first) and spigot end of the gearbox input shaft.
12. Sleeve (release bearing carrier) - (1) - 147858
Original type.
13. Roll Pin (locating release fork on sleeve) - (1) - DS811
14. Release Fork Assembly - (1) - 106022
15. Pin (pivot, release fork to sleeve) - (2) - 100164
16. Pin (tapered, release fork to cross shaft) - (1) - 158777
17. Locking Wire (tapered pin) - (1) - 30047
The tapered pin holding the release fork to the cross shaft often cracks or breaks. This can be the reason for clutch-drag - caused by part of the slave cylinder push rod travel being taken up by movement between the fork and the cross shaft. When carrying out any work involving the removal of the engine, gearbox or both from the car, the opportunity should be taken to replace the pin while access to it is easy, wether it appears to need replacing or not.
Correct seating of the pin in the cross shaft is important. Ensure that any broken parts of the pin are removed from the fork and shaft. Also, the taper angle of the pin should correspond to that in the hole in the cross shaft. Trial fitment of the pin in the hole in the cross shaft without the presence of the release fork will bring to light any irregularities in the two components. If the pin wobbles in the hole, it may be 'lapped' into a better fit. If the amount of lapping required is excessive, replacement of the clutch cross shaft or the tapered pin may be necessary.
18. Cross Shaft & Lever Assembly - (1) - 136354
19. Spring (alignment, cross shaft) - (1) - 144578
20. Bush (cross shaft, in gearbox casing) - (2) - 137651
21. Push Rod Assembly (slave cylinder to cross shaft lever) - (1) - 138572
This should connect to the centre hole on the lever assembly. The bottom hole is used by the 2000 & 2.5 saloons. The top hole could be used to obtain extra clutch release bearing movement at the expense of a heavier clutch.
22. Clevis Pin (securing push rod on lever) - (1) - PJ8808
23. Washer (plain) - (1) - WP8
24. Split Pin - (1) - PC9
At an undefined time in the past, the design of some of the internal components of the clutch slave cylinder was changed. While the cylinder bore size remained unaltered, the seal and piston changed in the way they assembled. As stated above the change point was not documented, so the repair kit that is now supplied includes not only the parts to reseal a later cylinder, but also those required to update an earlier version.
25. Slave Cylinder Assembly (clutch) - (1) - UKC8677
26. Repair Kit (slave cylinder) - (1) - 513390
27. Bleed Nipple - (1) - 501207
28. Spring - (1) - 513954
29. Bracket (salve cylinder to gearbox) - (1) - 136353
30. Bolt (slave cylinder to bracket) - (2) - HB809
31. Washer (locking) - (2) - WL208
32. Nut - (2) - HN2008
33. Bolt (bracket to gearbox casing) - (2) - HB813
34. Washer (locking) - (2) - WL208
35. Nut - (2) - HN2008
The bore of the TR6 clutch master cylinder assembly changed, at body number 50910CP, from 3/4" to 7/10". This change very effectively lightened the clutch pedal load; the downside was that it aggravated the problem of insufficient clutch clearance on a mechanism that was worn or had a broken tapered pin in the cross shaft. The later, smaller bore diameter, master cylinders may be used to replace earlier types.
If a repair kit is required, before placing an order the cylinder bore diameter must obviously be identified. This is simply achieved by reading the size off the exterior of the cylinder.
36. Clutch Master Cylinder Assembly - (1) - 148531
37. Push Rod Assembly - (1) - 122296
38. Filler Cap - (1) - 106094
39. Spring (piston return) - (1) - 510815
40. Repair Kit (master cylinder) - (1) - GRK1027
41. Seal (filler cap) - (1) - 106095
42. Circlip (push rod retaining) - (1) - 106092
36. Clutch Master Cylinder Assembly - (1) - 148530
37. Push Rod Assembly - (1) - 148607
38. Filler cap - (1) - 106094
39. Spring (piston return) - (1) - 510815
40. Repair Kit (master cylinder) - (1) - GRK1027
41. Seal (filler cap) - (1) - 106095
42. Circlip (push rod retaining) - (1) - 106092
36. Clutch Master Cylinder Assembly - (1) - 154932
37. Push Rod Assembly - (1) - 122296
38. Filler Cap - (1) - 106094
39. Spring (piston return) - (1) - 510815
40. Repair Kit (master cylinder) - (1) - 18G8986
41. Seal (filler cap) - (1) - 106095
42. Circlip (push rod retaining) - (1) - 106092
36. Clutch Master Cylinder Assembly - (1) - 154933
37. Push Rod Assembly - (1) - 148607
38. Filler Cap - (1) - 106094
39. Spring (piston return) - (1) - 510815
40. Repair Kit (master cylinder) - (1) - 18G8986
41. Seal (filler cap) - (1) - 106095
42. Circlip (push rod retaining) - (1) - 106092
43. Clevis Pin (securing push rod to pedal) - (1) - PJ8808
44. Washer (plain) - (1) - WP8
45. Split Pin - (1) - PC9
Any wear or looseness of the clevis pin, either in the pedal or in the master cylinder push rod, must be rectified. The wear will restrict the total amount of clutch pedal movement being transmitted to the master cylinder. This in turn brings on the age old problem of clutch drag that Triumph TR6's seem to be dogged with as they get older. If you suffer clutch drag (symptoms: 'rattling' engagement into reverse gear; engagement/disengagement stiffness in other gears), fit new clevis pins as they may just fix your problem - at minimal expense!
46. Bracket (clutch mounting) - (1) - 146313
47. Dust Cover (clutch pedal and push rod) - (1) - 125217
48. Screw (master cylinder to bracket) - (2) - HU807
49. Washer (locking) - (2) - WL208
48. Screw (master cylinder to pedal box) - (2) - HU808
49. Washer (locking) - (2) - WL208
50. Pedal Assembly (clutch) - (1) - 148021
RH steering.
Pedal Assembly (clutch) - (1) - 148023
LH steering.
51. Pad (pedal, rubber) - (1) - 122289
52. Bush (clutch pedal to pedal shaft) - (2) - 136611
53. Return Spring (pedal) - (1) - 57950
54. Pipe (master cylinder to hose) - (1) - 308362
RH steering.
Pipe (master cylinder to hose) - (1) - 148816
LH steering.
55. Clip (pipe to bulkhead) - (4) - 119147
RH steering.
56. Clip (pipe to bulkhead) - (1) - 618303
LH steering.
57. Screw (pipe clip to bulkhead) - (4/1) - YZ3303
Quantity increased on RH steering models.
58. Connector (pipe to hose) - (1) - 598693
59. Hose (flexible, connector to slave cylinder) - (1) - 140420
Original specification.
60. Hose (flexible, connector to slave cylinder, stainless steel braided) - (1) - 140420AQ
Alternative, uprated specification.
61. Brake Fluid (DOT 3, 1 litre) - (ar) - GBF103
62. Silicone Brake Fluid (0.5 litre) - (ar) - RX1327
Silicone Brake Fluid (1 litre) - (ar) - RX1326
63. Brake Rubber Grease - (ar) - 514578
64. Brake Cleaner - (ar) - GBF901
65. WD40 (400ml can) - (ar) - GAC111
66. Studloc (Loctite, 10ml) - (ar) - GAC100
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