Dynabrade 53868 Keselamatan, Pengoperasian Dan Pemeliharaan - Halaman 5
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Disassembly/Assembly Instructions - Right Angle Sanders
Important:
The Manufacturing Warranty is void if the tool is disassembled before the warranty expires by anyone other than a Dynabrade
Notice: A 96100 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.
Note: Use a wrench to hold the air tool inlet bushing stationary when removing the air supply connection.
2. Remove any abrasive product, flanging, guard, and side handle.
Motor Disassembly:
1. Use a 3mm drive punch to remove the throttle lever.
2. Roll back front edge of 25253 Insulating Cover just enough to expose wrench flats on 25257 Cup Nut.
3. Place padding around the housing and carefully hold the housing stationary in a vise. Use an adjustable wrench or 98283 Open End Wrench ( sold separately ) to loosen the
25257 Cup Nut. Turn counterclockwise. Note: Applying heat to cup nut will help loosen adhesive.
4. Carefully pull motor assembly out of the housing.
5. Hold pinion gear in a vise with aluminum or bronze jaws. Use an adjustable wrench to remove the governor assembly.
LEFT HAND THREAD Turn clockwise.
6. Fasten 96346 2" Bearing Separator around the portion of 25235 Cylinder that is closest to 25237 Rear Bearing Plate. Place the bearing separator motor on the table
of the 96232 #2 Arbor Press with pinion gear pointing downward. Use a 3/16" or 4mm diameter flat end drive punch push rotor out of the 01206 Bearing.
7. Remove the vanes from rotor and 01206 Bearing from bearing plate.
8. Fasten the vane slot portion of rotor in a vise with aluminum or bronze jaws so that the pinion gear is pointing up.
9. Use a hook/pin spanner wrench unthread pinion gear from rotor. Turn counterclockwise.
10. Remove the front bearing plate, shims and 01010 Spacer.
Motor Disassembly Complete.
Spindle/Gear Disassembly:
1. Place padding around the housing and carefully hold the housing stationary in a vise with the spindle pointing up. Use the 97782 Pin Wrench ( sold separately ) or an
adjustable pin wrench to remove 25265 Retainer. LEFT HAND THREAD Turn clockwise.
2. Remove 53609 Felt Seal from spindle or retainer.
3. Pull spindle and gear assembly out of the housing.
4. Fasten the 96346 2" Bearing Separator under 02057 Bearing and press spindle through bearing. Remove 25264 Wick.
Remove 98243 Wave Spring from the right angle housing.
5. Fasten the 96346 2" Bearing Separator between 01036 Bearing and spiral bevel gear. Place the bearing separator along with the spiral bevel gear assembly on the table of the
96232 #2 Arbor Press so that the spindle thread is pointing down. Push the gear off the spindle.
6. Remove the 01036 Bearing the same way.
7. Remove the housing from vise.
Spindle Disassembly Complete.
Spindle Lock Disassembly:
1. Apply a small amount of the Dynabrade Air Lube 10W/NR (P/N 95842 or equivalent) around the 25273 Plunger Assembly.
2. Place padding around the housing and carefully hold the housing stationary in a vise with the plunger assembly facing up.
3. Use two flat blade screwdrivers to pry the plunger assembly out of the 25275 Spindle Lock Bushing.
4. Remove the 98285 Spring and the 96156 Ring from the plunger.
Spindle Lock Disassembly Complete.
Valve Disassembly:
1. Secure 25245 Throttle Handle in a vise using wrench flats so that the 25213 Inlet Bushing pointing upward.
2. Use an adjustable wrench, unthread 25213 Inlet Bushing. Turn counterclockwise.
3. Use needle nose pliers, pull 25249 Tip Valve from handle.
4. Use a small screwdriver to remove the 96443 O-Ring from the valve stem and remove the valve stem.
5. Position 25245 Throttle Handle in the vise with 25257 Cup Nut and 25256 Governor Housing pointing up. Use a 10 mm hex key to remove the 25256 and
25257. Turn counterclockwise. Note: Applying heat to throttle handle will help loosen adhesive bond.
6. Push the 51945 Valve Seat out of the 25245 Throttle Handle.
Valve Body Disassembly Complete.
Important: Clean and inspect all parts for wear before assembling. Note: Follow all lubricant, adhesive, and torque specifications.
Valve Assembly:
1. Install 96443 O-Ring onto 25247 Valve Stem. Apply Dynabrade Air Lube to 96443 O-Ring and carefully install the valve stem and o-ring assembly into the
throttle handle. Note: Rotating the valve stem while inserting prevents damage to the o-ring
2. Apply several drops of the Dynabrade Air Lube 10W/NR (P/N 95842 or equivalent) to valve seat pocket wall on the inside of the 25245 Throttle Handle before inserting the
51945 Valve Seat. Install the 51945 Valve Seat by aligning the 3 male prongs of the valve seat with three slots of the valve seat pocket in the throttle handle. Note: Use an
arbor press and the 96241 Bearing Press Tool to support the valve seat and press it into the valve seat pocket. Make certain that the valve seat lays flat.
3. Use needle nose pliers install 25249 Tip Valve into the throttle handle.
4. Install 51940 Spacer onto 25213 Inlet Bushing, followed by the 96442 O-Ring. Install the larger end of the 25250 Spring into the inlet bushing. The smaller end of the
spring fits against the back of the tip valve.
5. Apply a small amount of the Loctite
vise using wrench flats. (Torque to 35N·m/310 lbs. in.)
6. Position the throttle handle in vise with the inlet bushing pointing downward.
7. Install the 66435 O-Ring onto the 25256 Governor Housing. Apply some Dynabrade Air Lube to the o-ring. Insert the governor housing through the 25257 Cup Nut. Apply a
small amount of the Loctite
®
#567 (or equivalent) to the external threads of the governor housing. Use a 10 mm hex key to fasten the governor housing and cup nut onto the
throttle handle. Turn clockwise. (Torque to 34N·m/300 lbs. in.) Note: The position of the throttle lever should be secured between the 9:00 to 11:00 o'clock position to best
protect the operator from unintentional starts.
8. Apply a few drops of Loctite
®
#380 (or equivalent) to both sides of the throttle handle (as shown). Install the 25253 Insulating Cover and the 01462 Throttle Lever onto
the throttle handle.
Valve Assembly Complete.
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#243 (or equivalent) to the external threads of the 25213 Inlet Bushing and install it onto the throttle handle. Secure throttle handle in a
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5
®
Approved Repair Technician.
®