A.J.S. 16MS, Instruction Book

Page: 29 / 94

Illustration 8
Application of
valve spring compressor
1
2
3
4
COLLET, FOR VALVE.
COLLAR, FOR VALVE SPRING.
COLLAR, FOR VALVE SPRING.
BOLT THROUGH TOOLS AND COILS OF
VALVE SPRING.
5
6
7
VALVE SPRING COMPRESSOR TOOL.
OIL PASSAGE FROM ROCKER BOX TO
INLET VALVE GUIDE.
SCREW WITH LOCK NUT ADJUSTING
OIL FEED TO INLET VALVE.
NOTE—The special valve spring compressor tool is not part of the standard tool kit but
can be obtained from any of our dealers (Part No. 018276.)
It is essential that the collets are correctly located on the valve stems. It will
be observed that the collet has two grooves machined in the bore and those
two grooves must register with the two rings on the valve stem. If fitted so that
only one of the grooves engages the ringed valve stem, damage will almost certainly
result.
On 350 c.c. the inlet valve head is larger in diameter than the exhaust. Therefore
unintended interchange is not possible.
On 500 c.c. both valve heads are identical in dimensions but are made of different
materials. Therefore, upon removal, valves should be laid aside so that they
may be identified for re-fitting. In case of doubt, see marking " In " or " Ex "
on stem adjacent to collet grooves.
27
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