3
Disassembly and Reassembly of the Air Motor
Disassembly
1.
Remove the air motor casing from the gear casing connector.
2.
Take hold of the end of the rotor and pull the air motor out of the casing.
3.
Remove the front plate spacer and locking pin.
4.
Pull the front plate off and remove the bearing.
5.
Remove blades from the rotor.
6.
Press the rotor out of the rear plate bearing and remove the bearing from the rear plate.
7.
Thoroughly clean all parts.
Inspection
1.
Bearings:
Inspect bearings for knocking and side play.
2.
Cylinder:
Inspect cylinder for waviness.
3.
Plates:
Inspect plates for grooving.
4.
Blades:
Inspect blades for splitting and grooving on the sides and ends.
5.
Silencer:
Inspect silencer for dirt.
6.
Replace all worn parts.
Assembly
1.
Press greased bearing into the rear plate and over the rotor.
Note:
There should be a slight drag
between the rotor and the rear plate
2.
Lightly oil the blade and install into the rotor flat-side out.
3.
Slide the cylinder down over the rotor, and line up the roll pin with the center hole in the rear plate.
4.
Grease bearing and press into the front plate. Install the front plate onto the rotor with bearing-side
up.
5.
Slide the air motor assembly into the casing, lining up the pinion with the side of the front plate with
the slot in the casing.
6.
Install locking pin and front plate spacer.
7.
Thread the gear motor casing assembly onto the air motor casing and test the tool.
