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.)
(continued on next page)
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