A.J.S. 16 Instruction Book - page 34
Illustration 16
The valve guides and the needle adjusting screw are also shown withdrawn.
1
2
3
4
5
6
7
PLAIN HOLE, FOR OIL FEED TO INLET
VALVE.
TAPPED
HOLE,
TO
ACCOMMODATE
CARBURETTER RETAINING STUD.
INLET PORT.
TAPPED
HOLE,
TO
ACCOMMODATE
CARBURETTER RETAINING STUD.
HOLE.
TO
ACCOMMODAT E
D O W E L
LOCATING VALVE SPRING SEAT.
GUIDE, FOR INLET VALVE.
TAPPED HOLE, FOR SPARKING PLUG.
8
9
10
11
12
13
14
PLAIN HOLE, FOR OIL FEED TO EXHAUST
VALVE.
HOLE, TO ACCOMMODAT E D O W E L PIN
LOCATING VALVE SPRING SEAT.
GUIDE, FOR EXHAUST VALVE.
CIRCLIP.
EXHAUST PORT.
NEEDLE SCREW, ADJUSTING OIL FEED
TO INLET VALVE.
LOCK N U T , FOR NEEDLE ADJUSTING
SCREW.
REMOVING CARBON DEPOSIT
A cheap 6" steel rule is suitable for this purpose. The use of emery cloth or similar
abrasives is not recommended to remove carbon deposit.
VALVE G R I N D I N G
The grinding is accomplished by smearing a thin layer of fine grinding paste (obtainable
ready for use at any garage) on the valve face and then, after inserting the valve in the
head, partially revolve, forwards and backwards, while applying light finger pressure to
the head, raising the valve off its seat and turning to another position after every few
movements. (Never revolve the valve continuously in one direction.)
When the abrasive ceases to bite, remove the valve and examine its face.
The grinding may be considered to be satisfactorily completed when a continuous matt
ring is observed on both valve face and seat.
After grinding, all traces of abrasive must be carefully washed off with petrol and a piece
of rag, moistened in petrol, should be pulled through the bore of each valve guide to
remove any abrasive that may have entered.
A holder for the valve, when grinding in the valve, can be supplied. The part number
is 017482.
TO REPLACE T H E CYLINDER HEAD—SINGLES
A gasket is fitted between cylinder head and barrel.
The top ends of the push rod cover tubes have rubber gaskets between tubes and head,
they are a push fit and metal washers are located between the top edges of the gaskets
and the cylinder head recesses. If the cover tubes are pulled away from the head, the
gaskets will probably remain in position in the head.
A rubber gland is fitted at the bottom of each cover tube.
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