Triumph TR6 PI Operation Manual page 86

ENGINE
Dismantling
1.
Remove the rocker shaft assembly 12.29.42.
2. Withdraw the split 'pin from the front end of the
rocker shaft.
3. Remove the rockers, pedestals, springs and spacers
from the front end of the shaft noting the order for
reassembly.
4. Remove the screw locating the shaft to number six
pedestal.
5. Remove number six pedestal with number twelve
rocker and flat spring.
Examination
6. Check the rocker shaft for wear on the rocker
running areas using the unworn parts of the shaft as a
guide. Examine the shaft for scores and pitting.
Renew the shaft if unsatisfactory.
7. Examine the rocker pads for wear and pitting and
renew if unservicable. Regrinding the pads as a
method of restoration is not recommended. Check
the rocker bores for wear against an -unworn part of
the rocker shaft. Excessively worn rockers should be
discarded. Ensure the oil way holes are clear.
S. Examine the rocker spacing springs and renew any
that are broken or have lost their tension.
ROCKER SHAFT ASSEMBLY
- Overhaul
6
5 _
DATA
Diameter of shaft
Bore size of rockers
Bore size of pedestals
Spring free length
12.29.55
4
12.29.55
9
Reassembling
9. Assemble number twelve rocker and number six
pedestal to the rocker shaft ensuring that the flat
spring is correctly positioned between the rocker and
pedestal.
10. Fit the remaining rockers, spacers, and spacer springs
as illustrated. Ensure that the flat spring is positioned
correctly between number one rocker and pedestal.
Secure with a new split pin.
11. Refit the rocker shaft and lubricate with clean engine
oil before fitting the rocker cover.
-5607 - ·5612 in (14·242 - 14·254 mm)
·563 -·564 in (14·300 - 14·325 mm)
·563 - ·564 in (14·300 - 14·325 mm)
2·71 in (6S·S mm)
Triuml?lt TR6 Manual. Part No. 545277 Issue I