Dynabrade 51420 Podręcznik - Strona 3
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Drukuj stronęDisassembly/Assembly Instructions - .4 Hp/7˚/Rear Exhaust
Important: Manufacturer's warranty is void if tool is disassembled before warranty expires.
Notice: Dynabrade strongly recommends the use of their 52296 Repair Collar (sold separately) during assembly/disassembly activities. All of the
special repair tools referred to in these instructions can be ordered from Dynabrade. Please refer to this parts page for proper part identification.
Planetary Gear Case Disassembly:
1. Disconnect tool from power source.
2. Remove the disc pad.
3. Use the 52296 Repair Collar to secure the tool in a vise so that the 50782 Adapter is pointing up.
4. Use the 50971 Lock Ring Wrench to remove the 50781 Rear Exhaust Cover by turning it counterclockwise.
5. Use the 96401 2mm Hex Key to remove the 50784 Set Screw.
6. Pull the 50782 Adapter Along with the planetary gear assembly out of the 50776 Motor Housing.
7. Fasten the 96346 2" Bearing Separator between the 54468 Ring Gear and the rear 54552 Bearing.
8. Place the planetary gear assembly and the separator on the table of the 96232 Arbor Press so that the 50782 Adapter is pointing down.
9. Carefully place the 96213 Bearing Removal Tool against the 50786 or 50787 Planetary Carrier removing it from the rear 94552 Bearing.
10. Remove the ring gear, shafts and gears from the planetary carrier.
11. Secure the planetary carrier in a vice with aluminum or bronze jaws so that the 50782 Adapter is pointing up. Use an adjustable wrench to remove the adapter from
the planetary carrier.
Planetary Gear Case Disassembly Complete.
Motor Disassembly:
1. Pull the motor assembly from the housing.
2. Remove the 50778 Spacer from the motor.
3. Fasten the 96346 2" Bearing Separator around the rear portion of the 01476 Cylinder closest to the rear bearing plate.
4. Place the separator and the motor assembly on the table of the 96232 Arbor Press so that the pinion gear of the rotor is pointing down. Use a 3/16" dia. flat end drive punch
as a press tool. Place it against the rear bearing journal of the rotor and push the rotor from the 02696 Bearing.
5. Remove the 02679 Shield from the 02696 Bearing.
6. Use the 96210 Bearing Removal Tool to remove the 02696 Bearing from the 02676 Rear Bearing Plate.
7. Remove the 01480 Blades from the rotor.
8. Press the 02649 Bearing from the rotor, removing the 01478 Front Bearing Plate and the 54529 Shims.
9. Remove the 01479 Spacer from the rotor.
Motor Disassembly Complete.
Valve Disassembly:
1. Place the 52296 Repair Collar around the valve housing and secure it in a vise so that the air inlet is pointing up.
2. Use two wrenches when removing the air fitting. Place one wrench on the 94523 Inlet Adapter to hold it stationary and use another wrench to remove the air fitting.
3. Remove the inlet adapter from the valve housing. Note: Refer to the exploded view of the muffler assembly to identify the parts and their order of disassembly.
4. Use a needle nose pliers to remove the 01468 Spring and the 01472 Tip Valve. The 01464 Seal can be removed from the valve housing with a small screwdriver.
5. Use retaining ring pliers to remove the 95558 Retaining Ring and push the 01469 Speed Regulator Assembly along with the 01449 Valve Stem out of the valve housing.
6. Use a 2.5mm drive punch to remove the 12132 Pin and the throttle lever.
Valve Disassembly Complete.
Valve Assembly:
Important: Clean and inspect all parts before assembling.
1. Place the 52296 Repair Collar around the valve housing and secure it in a vise so that the air inlet is pointing up.
2. Install the 01469 Speed Regulator Assembly (includes o-rings) into the motor housing and secure it in place with the 95558 Retaining Ring.
3. Insert the 01449 Valve Stem so that the end with the hole fits into the 01469 Speed Regulator Assembly.
4. Install the 01469 Seal into the air inlet so that it is lying flat.
5. Use a needle nose pliers to gasp the white nylon portion of the 01472 Tip Valve and insert the metal pin of the tip valve into the hole in the 01449 Valve Stem.
6. Install the 01468 Spring so that the smaller end of the spring fits against the center of the tip valve.
7. Note: Refer to the exploded view of the muffler assembly to identify the parts and their order of assembly. Apply a small amount of the #567 Loctite (or equivalent) to the
threads of the inlet adapter and install it into the air inlet of the valve housing. (Torque to 23 N•m/200 in.- lbs.)
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Install the throttle lever and secure it in place with the 12132 Pin.
9. Use two wrenches when installing the air fitting. Place one wrench on the 94523 Inlet Adapter to hold it stationary and use another wrench to install the air fitting.
Valve Assembly Complete.
Motor Assembly:
1. Install the 01479 Spacer onto the rotor.
2. Select .003" thickness in shims from the 54529 Shim Pack and place these into the 01478 Front Bearing Plate.
3. Install the 02649 Bearing into the front bearing plate.
4. Use the 96240 Bearing Press Tool (position the raised inside diameter against the inside diameter of the bearing) and the 96232 Arbor Press to install these parts onto the
pinion end of the rotor.
5. Check the rotor/plate clearance with a .001" (0.03mm) feeler gage. The clearance should be .001"-.0015" (0.03-0.04mm). If the rotor/plate clearance needs adjustment,
repeat steps 4-5 and shim as required.
6. Apply the 95842 Dynabrade Air Lube (10W/NR or equivalent) to the 01480 Blades (4) and install these into the slots in the rotor.
7. Install the 01476 Cylinder over the rotor so that the air inlet opening of the cylinder will align with the air inlet opening of the 02676 Rear Bearing Plate.
8. Use the 96216 Bearing Press Tool (position the raised outside diameter against the outside diameter of the bearing) and 96232 Arbor Press to install the 02696 Bearing into
the rear bearing plate.
9. Use the 96216 Bearing Press Tool (position the raised inside diameter against the inside diameter of the bearing) and 96232 Arbor Press to install these parts onto the rear
bearing journal of the rotor. Important: Press the rear bearing/plate assembly down onto the rotor only until the 02676 Rear bearing Plate comes in contact with the 01478
Cylinder. This fit will establish a preload on the motor bearings producing a "snug fit" between the bearings and the cylinder. If the fit is too tight it will cause the bearings to
wear prematurely, too loose and the desired preload will not be achieved. If an adjustment is required disassemble and repeat steps 7-8.
10. Apply a small amount of the 95542 Grease to the seal of the 02696 Bearing and install the 02679 Shield against the bearings.
(continued on next page)
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