McNeil 1500-88 repair manual?

[warsdad]

Would anyone happen to have a repair manual for this machine, or at least a diagram for repairing
the index arm? And maybe something on the oven damper system? Maybe in pdf format or even just
a scanned image would be very helpful. Thanks

[Joel Martin]

Boy I haven't been here in a long time.
If you still need info/help let me know.

Joel

[warsdad]

Thanks for the reply Joel.

We fixed the index arm, the threads were stripped
in the end of the plunger.

AS far as the damper goes, it is still bolted in place
from shipping. They have been running the machine
for years with the damper closed, and they have
had to replace the blower once already. And they
wonder why it is a fuel hog. Cooking at 580-600 for
12 minutes on 5 to 10 pound parts just does not seem
right. This oven is not convecting properly.

[Joel Martin]

The damper is closed? Why not just have it open all of the time? At least the parts will cook faster. The damper is pretty simple on your machine though. Could chat you though any issues with fixing it.
You can e-mail me at joel at rotodoctorllc dot com

[williamblake621]

which parts cook faster & you said that damper is pretty simple, how is that ?

[warsdad]

The damper is a re-circulating air system inside the oven. When the arm cycles into the
oven an analog timer is powered and starts counting down, when it zeros out it sends power
to a solenoid valve that controls an air cylinder to open the damper.

You have to remember this is a convecting oven, with the damper closed the re-circulating
blower is starved for air, this holds the heat in the burn chamber so the oven loses less
heat when the machine cycles from station to station. Once the oven doors close and the
timer zeros the damper opens flushing more oven air through the burn chamber, this makes
the air hotter and more turbulent in the oven, cooking the molds faster.

I hope that helps to explain it.