Disassembly/Assembly Instructions - .4 hp Dynafine®Tools
Important: The Manufacturing Warranty is void if the tool is disassembled before the warranty expires, by anyone other than a
Dynabrade®Approved Repair Technician. Notice: A 96236 Motor Tune-Up Kit is available. Also, the special repair tooling referred to
in these instructions can be ordered through your Dynabrade
®
Distributor. Please refer to this tool manual for correct
part number identification.
Important: Always follow these steps before servicing any part of this air tool.
1. Shut off the air supply, and depress throttle lever to dissipate the remaining air. Carefully disconnect the tool from the air supply hose.
Motor Disassembly:
1. Place the 52296 Repair Collar around the 01546/57779 Housing and hold the sander in a vise with the sanding attachment facing up.
2. Use the 95266 Hex Key (3mm) to remove the sanding attachment.
3. Loosen and remove the 95884 Boot Clamp and boot assembly.
4. Use an adjustable 3mm pin spanner wrench or the 50971 Lock Ring Tool to loosen the 57962 Exhaust Cover by turning it counterclockwise.
5. Pull the air motor out of the 01546/57779 Housing. Fasten the 96346 Bearing Separator (2") around the portion of the 01476 Cylinder that is closest to
the rear bearing plate.
6. Place the bearing separator and the air motor on the table of the 96232 Arbor Press (#2) so that the cam assembly is pointing down.
7. Remove the 02679 Shield from the 02696 Bearing.
8. Use a 3/16" or 4mm diameter flat end drive punch as a press tool to push the rotor out of the 02696 Bearing.
9. Remove the cylinder and vanes.
10. Use the 96210 Bearing Removal Tool and the arbor press to remove the 02696 Bearing from the 02673 Rear Bearing Plate.
11. Hold the vane slot portion of the rotor in a vise with aluminum or bronze jaws so that the cam assembly is pointing up.
12. Use an adjustable open-end wrench to remove the cam assembly by turning it counterclockwise.
13. Remove the 02649 Bearing, 01478 Front Bearing Plate, 54529 Shims and 01479 Spacer from the rotor.
Motor Disassembly Complete.
Valve Disassembly:
1. Place the 52296 Repair Collar around the 01546/57779 Housing and hold the tool in a vise so that the inlet adapter is pointing up.
2. Use two wrenches, one to hold the inlet adapter stationary and the other to remove the air fitting.
3. Remove the inlet adapter by turning it counterclockwise. Note: Refer to the exploded view of the muffler to identify components and their
order of disassembly.
4. Use needle nose pliers to remove the 01468 Spring and the 01472 Tip Valve. Use a small screwdriver to remove the 01464 Seal.
5. Use a 2.5mm diameter drive punch to remove the 12132 Pin, and throttle lever. Remove the 01449 Valve Stem.
6. Use retaining ring pliers to remove the 95558 Retaining Ring and the 01469 Speed Regulator Assembly from the housing.
Valve Disassembly Complete.
Important: Clean and inspect all parts before assembling.
Valve Assembly:
1. Install the 01469 Speed Regulator Assembly (with o-rings) into the 01546/57779 Housing and hold it in place with the 95558 Retaining Ring.
2. Position the 52296 Repair Collar around the 01546/57779 Housing and hold the tool in a vise so that the 12132 Pin, throttle lever, and 01449
Valve Stem can be installed.
3. Position the 52296 Repair Collar around the 01546/57779 Housing and hold the tool in a vise so that the air inlet opening is pointing up.
4. Install the 01464 Seal into the air inlet so that it is laying flat.
5. Use needle nose pliers to install the 01472 Tip Valve so that the metal pin passes through the hole in the 01449 Valve Stem.
6. Install the 01468 Spring so that the smaller end of the spring fits against the back of the tip valve.
7. Apply a small amount of the Loctite
®
#567 (or equivalent) to the external threads of the inlet adapter and install it into the valve housing.
Note: Refer to the exploded view of the muffler to identify components and their order of assembly.
8. Use two wrenches, one to hold the inlet adapter stationary and the other to install the air fitting.
Valve Assembly Complete.
Motor Assembly:
1. Hold the vane slot portion of the rotor in a vise with aluminum or bronze jaws so that the threaded spindle is pointing up.
2. Install the 01479 Spacer onto the rotor.
3. Select .003" (.08mm) thickness in shims from the 54529 Shim Pack and install shims into the 02038 Front Bearing Plate.
4. Install the 02649 Bearing into the front bearing plate and onto the rotor.
5. Install the 57962 Exhaust Cover and the 58095 Cam Assembly onto the rotor. (Torque to 17 N•m/150 in. lbs.)
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