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2.
A badly scored Cylinder cannot be restored to usefulness by honing.
Enlarging the inside diameter widens the seal point between the Rotor and
Cylinder to a degree that will hinder the operation of the motor and will result
in loss of speed and power.
3.
Minor scoring and rust can be removed from the inside the Cylinder by using
a Flybur Tool. This tool can be made from a slotted piece of metal dowel rod
and a piece of 150 grit abrasive mounted in a small air or electric drill. If
scoring cannot be removed with a light application of this tool, the Cylinder
should be replaced.
4.
The
ROTOR [27]
is the rotating member of the motor that transmits the
torque produced by the Blades. It is machined of heat-treated steel and then
ground to precise dimensions. Slots are milled in the body to accept the
Blades. The front-end of the Rotor Spindle is splined for driving the
HAMMER CAM [16]
. Examine all surfaces of the Rotor for roughness and
smooth them with an India Stone if necessary. Normally, there should be no
noticeable wear on these faces, since the Rotor is .003" (approx.) shorter
than the Cylinder. Inspect the Blade slots for wear or burrs. A new Blade
should move in and out of the slot freely. If necessary, use a honing stone to
break away any sharp edges found on the corners of the slots of the Rotor.
Examine the spline or gear teeth at the driving end. If they have become so
worn that a step can be seen next to mating surfaces, then the Rotor should
be replaced.
5.
The
CYLINDER PLATES [26]
are machined from low-carbon steel or brass.
They provide support to the Front and Rear Bearings and enclose the Cylinder
ends. The Ball Bearings are located in each Cylinder Plate and support the
Rotor. If the face of the Front or Rear End Plate shows wear greater than a
depth of .005” (or if Cylinder Plate is cracked) it should be replaced. Such
wear is usually caused by a dirty or wet air supply. Light score marks can
often be lapped out with a 150 grit abrasive cloth on a flat surface plate.
IMPORTANT
Installation of an air filter/dryer in the air
supply line is the best method for reducing
grooving and scoring of the cylinder.
PN: 82-10420 is recommended.
