Scott Janzen asked for an explanation of the "Rule of 13" for valve
adjusting [in response to another mail string on FOT list]. Here is
my reply:
The way it works is you take the number of the valve that is most open
[spring compressed] and subtract that valve's number from 13. The
result is the valve you should be adjusting. Example: Number 7 valve
is fully compressed. 13-7=6. Adjust valve 6. I worked out a
sequence yesterday by logic, have not validated against the machine
till Friday. Here it is [note, the amount of rotation varies.
Figuring 110 degree of lobe separation, it will be 10 degrees between
1 and 6, then 110 between 6 and 5,then 10 degrees between 5 and 10,
etc. That is why you actually can adjust in pairs, that is 1 and 6
compressed,adjust 12 and 7. [this does not jive with the pairs in the
manual,so I may have worked out the numbers correctly].:
open adjust
1 12
6 7
5 8
10 3
2 11
9 4
12 1
7 6
8 5
3 10
11 2
4 9
--
Chuck Arnold and Kathleen Kelley
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