Triumph TR6 PI Operation Manual page 241

SYNCHROMrnSHGEARBOX
Q.
1st/2nd synchro unit fitted with synchro cups.
b.
Adjustment washer.
c.
Assembled 1st gear and bush (see 39 Note).
d. Thrust washer.
WARNING: IT IS RECOMMENDED THAT SEVERAL
WINDINGS OF CORD ARE LASHED AROUND
MAINSHAFT TO REAR OF THE 1st GEAR TO
PREVENT ITS MOVEMENT, THEREBY,
AVOIDING ANY POSSIBILITY OF PERSONAL
DAMAGE WHEN FITTING THE MAINSHAFT.
41. Enter the rear of the mainshaft through the top cover
and rear apertures of gearbox, respectively, and
manoeuvre mainshaft assembly into position.
42. Fit tool 8314 to the gearbox and engage the
mainshaft spigot in the tool.
43. Fit the snap ring to the bearing.
44. Fit the bearing to the mainshaft and gearbox. Tool
8314. Remove the tool.
45. Remove tool 8314.
46. Fit the washer and circlip to the mainshaft.
Protect the rear end of the mainshaft (hard brass
block), then tap on the rear end until the inner face
of the mainshaft bearing is in close abutment with the
washer and circlip.
47. Fit the top gear synchro cup.
48. Fit the constant pinion assembly,
49. Prior to engaging the countershaft gears, free the
synchro cups with a screwdriver.
50. Carefully invert the gearbox to engage the
countershaft gears - rotating the mainshaft and
constant pinion shaft as necessary.
51. Align the countershaft gears and thrust washers then
press home countershaft spindle.
37.20.04 Sheet 5
Triumph TR6 Manual. Part No. 545277 Issue I