Lubrication

MAINTENANCE SECTION

Always wear eye protection when operating or performing maintenance on this tool.

Always turn off the air supply and disconnect the air supply hose before installing, removing or adjusting any accessory on this tool, or before performing any maintenance on this tool.

Whenever one of these Grinders is disassembled for overhaul or replacement of parts, lubricate as follows:

1.Always wipe the Vanes (27) with a light film of oil before inserting them into the vane slots.

2.Inject 0.5 to 1.0 cc of Ingersoll-Rand No. 10 Oil into the Air Inlet (16) after assembly.

DISASSEMBLY

General Instruction:

1.Do not disassemble the tool any further than necessary to replace or repair damaged parts.

2.When grasping a tool or part in a vise, always use leather-covered or copper-covered vice jaws to protect the surface of the part or tool and help prevent distortion. This is particularly true of threaded members and housings. A special rubber block is available to hold the housing. The part number for ordering this special block is #22040992.

3.Do not remove any part, which is a press fit in or on a subassembly unless the removal of that part is necessary for repairs or replacement.

4.Do not disassemble the tool unless you have a complete set of new gaskets and O-Rings for replacement.

5.Do not press any needle bearing from a part unless you have a new needle bearing on hand for installation. Needle bearings are always damaged during the removal process.

Tool Specific Instructions:

-Steps common to all SC Models:

1.Remove the Collet Nut (36), Collet Cap (35) and Collet (34).

2.Remove the Housing Cap (37), using Wrench (46).

3.Remove the Motor Clamp (32).

4.Pull the Motor Assembly out of the Motor Housing (1).

5.Disassemble the motor.

-Steps common to all XC Models:

1.Remove the Extension Housing (42).

2.Grasp the Extension Housing in a vise and remove the Coupling Nut (39) while holding a wrench on the flats of the Arbor (44).

3.Press the Arbor (44) out of the Extension Housing.

4.Remove the Collet Nut (36), Collet Cap (35) and Collet (34).

5.Remove the Bearing (41) from the rear of the Extension Housing.

6.Press the Bearing (43) out of the front of the Extension Housing.

7.Remove the Coupler (40) and Clamp Sleeve (38) from the Motor Housing (1).

8.Pull the Motor Assembly out of the Motor Housing.

9.Disassemble the motor.

Disassembly of the Motor:

1.Grasp the Cylinder (28) in a vise and use a punch to tap the Rotor (26) out of the rear Bearing (23).

2.Remove the Vanes (27) from the Rotor.

3.Grasp the Rotor in a vise and remove the Collet Body (33) or Coupling Nut (39).

4.Remove the Front Rotor Bearing (31), if it must be replaced, by supporting the Front End Plate (29) between two blocks on the table of an Arbor Press. Place the blocks as close as possible to the body of the Rotor and press the Rotor from the Bearing and End Plate. Remove the Front End Plate Spacer (30) from the Rotor. Press the Bearing out of the End Plate using a 0.433” (11mm) pin.

5.Remove the Rear Bearing (23) if it must be replaced. Press the Bearing out of the End Plate using a 0.2375” (6.03mm) pin.

Disassembly of the Inlet and Throttle:

1.Using a 3/4” wrench, unscrew and remove the Inlet Bushing (16).

2.Remove the Exhaust Deflector (15), O-Ring (14) and Silencer (13) from the Inlet.

3.Using a ¼” bushing driver, tap the Motor Housing out of the Composite Housing (9).

4.Remove the O-Ring Gasket (8) and Muffler Element (12).

5.Unscrew the Valve Plug (22), and remove the Valve Stem (18), Valve Spring (20), Valve Spring Seat (19) and Valve O-Ring (17).

6.The Valve Bushing (2), if it must be replaced, is only available as part of an assembly of the Motor Housing and Bushing.

7.Press the Throttle Lever Pin (7) from the Housing and remove the Throttle Lever Assembly (3, 4, 5 and 6).

8.Any Throttle Lever parts to be replaced are only available as part of the Throttle Lever Assembly.