Sunbeam ALPINE I SERIES: APLINE II SERIES, Руководство по ремонту, Страница: 55 / 413

WSM.124
Section B (Engine)
TIMING COVER
To remove
Drain and remove radiator.
Slacken the generator mounting screws and remove
fan belt.
Unscrew crankshaft jaw nut and pull off combined
crankshaft pulley and damper. (Two tapped holes
provided).
Remove all screws and nuts holding
covet
in position,
and withdraw cover.
To refit
Reverse the above operations, taking great care to
centralise the cover around the crankshaft pulley,
before fully tightening the bolts. A timing cover
centraliser (R.G. 89) is supplied by Messrs. V. L.
Churchill.
TIMING WHEELS AND CHAIN
To remove
Remove timing cover.
Remove split pin and plain washer from tensioner
pivot pin and lift off tensioner blade.
Fig. 16. Timing wheel allgnment
I st re-Issue
Page 17
Remove the setscrew, tab washer, and plain washer
from front end of camshaft.
Remove oil thrower in front of crankshaft sprocket.
Pull or lever off both camshaft and crankshaft
wheels simultaneously.
To refit
When refitting, set Nos. I and 4 pistons to T.D. C.
so that the key is to the top of the crankshaft.
Push crankshaft wheel ·onto crankshaft until it is
approximately 1 ·5 .. (38 mm.) from the shaft shoulder.
To obtain the valve timing shown in Fig. 17, flt
chain to crankshaft wheel and camshaft wheel so
that the dots on the camshaft and crankshaft wheels
are in line (See Fig. 16).
Turn camshaft until the key lines up with the key
way in the camshaft wheel.
Pull camshaft wheel onto camshaft by means of a
washer and bolt screwed Into the camshaft end, and
drive crankshaft wheel onto crankshaft.
Replace camshaft sprocket fixing bolt and washer
Secure bolt with a new lock washer.
Replace crankshaft oil thrower.
Refit chain tensioner and timing cover, making sure
that the tensioner blade is correctly fitted.
The front face of the timing case Is bolted to a
pedestal bolt, and the free end of the tensioner
blade rests on the Inside of the timing case.
Camshaft sprockets used on these engines have
a small circular groove machined on the rear face
just below the bottom of the sprocket teeth.
Check Valve Timing
THIS IS ONLY NECES SARY WHEN INCORRECT
REPLACEMENT OF THE TIMING CHAIN IS
SUSPECTED, in which case the following quick
check can be made.
I. Remove rocker cover and adjust No. I cylinder
inlet valve rocker clearance to ·019-·020•
(·48-·50 mm.) when No. 4 cylinder inlet valve
Is fully open. This is Important as valve timing
cannot be checked at the normal valve rocker
clearances.