[ Pete Knobloch wrote in 111225 MMDigest:

> Clinton, just checking the air motor for dirt and cleaning almost
> never fixes the problem.  You didn't talk about doing any of the
> tests that I suggested in my post on MMD 2011.12.11.  Did you try
> the test of closing the air line off with your thumb and turning
> the motor backward?

I did; I'm sorry I neglected to say so.  I did close off the air
line and try to turn the motor backwards, and it was very difficult.
I am assuming this is the way it is supposed to be.

> As for the Tempo regulator, is the spring still attached to it?
> If this spring is missing, the vacuum going to the motor will be
> next to nothing.

I have absolutely no idea on this.  Where would I check for this
spring?  There is next to nothing for vacuum coming to the air motor.
If the spring is missing, will the tempo always slide backwards when
the roll plays, or will it stay stationary?  Mine generally stays
stationary when playing, if that is of any consequence.

Clinton Gray
Hereford, Arizona

 [ The governor spring is coil spring, like the spring that holds shut
 [ a screen door, that pulls open the moveable board of the governor
 [ pneumatic.  The pneumatic is pulled closed by the suction within,
 [ and as the moveable board closes an internal valve (usually a knife
 [ valve) chokes the air flowing to the main reservoir and exhauster
 [ bellows.  Thus the suction within the governor pneumatic is regulated
 [ within extremely close limits, so that varying suction at the action
 [ stack has no effect on the airmotor system suction.  -- Robbie