Triumph Rocket III Service Manual

Description
The engine is fitted with an aluminum alloy cylinder
head, which carries the camshafts, valves and spark
plugs. The cylinder head is cast as a single entity, to
which various components are permanently added
after machining.
A silent-running cam chain drives the twin-overhead
camshafts, which run directly in the cylinder head
without additional bearings. The chain is tensioned
by a spring-loaded device fitted to the cylinder head,
and is guided by two Teflon-coated rubber-faced
blades. Valve clearances are adjusted by changing
variable thickness shims that sit between the
camshaft and valve tappet bucket. The valves are
fitted with single, symmetrical valve springs. Both the
tip and seat face of the valves are hardened to give a
long service life. Due to assembly methods used, the
valve seats and valve guides cannot be replaced.
Oil is supplied to the cylinder head by an internal
passageway inside the engine. Once it arrives at the
cylinder head, it is passed through a restrictor, and is
then delivered to the camshaft bearing journals along
grooves in the cam ladder. The camshaft lobes are
splash fed by oil coming from the camshaft journals.
Cam Cover
Before starting work, ensure the motorcycle is
stabilised and adequately supported. This will help
prevent it from falling and causing injury to the
operator or damage to the motorcycle.
Removal
1. Remove the rider's seat (see page 17.9).
2. Disconnect the battery, negative (black) lead first.
3. Raise and prop the fuel tank (see page 11.98).
4. Remove the intake duct (see page 11.105)
together with its bracket.
5. Disconnect the spark plug leads from the spark
plugs then remove the coil brackets with the coils
attached.
6. Remove the bungs from the heads of the cam
cover fixings.
Cylinder Head
7. Release the bolts securing the cam cover to the
head.
-
1. Cam cover
2. Cam cover bolts
3. Bolt seals
8. Remove all the bolts and bolt-seals from the cam
cover.
9. Raise the cover and manoeuvre it towards the
right hand side of the engine, where it can be
removed.
Never use a lever to remove the cam cover from the
cylinder head. Using a lever will cause damage to
the cylinder head and cam cover, which could lead
to an oil leak.
10. Collect the seal from the head.
Service Manual - Rocket III
3.5

Triumph Rocket III Specifications

General

Brand	Triumph
Model	Rocket III
Category	Motorcycle
Language	English