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Dynabrade 53472 Disassembly & Assembly Instructions

Reversible pistol grip 0.5 hp. direct-drive screwdriver
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Reversible Pistol Grip 0.5 hp. Direct-Drive Screwdriver
Model: 53472, 53474, 53475, 53477
Notice: Use these instructions along with the tool manual.
Important: Disconnect tool from the air supply.
To avoid damage, use the Special Repair Tools designed for disassembly and assembly.
Motor Disassembly:
Protective
Padding
1.
Place protective padding around housing. Fasten "Driver" in vise with spindle pointing
up.
Use a 1-9/16" (~40 mm) crowfoot or adjustable wrench to remove gear housing.
Turn counterclockwise.
(To disassemble gears see: Planetary Gear Disassembly)
1-9/16" (~40 mm) crowfoot

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Summary of Contents for Dynabrade 53472

  • Page 1 Reversible Pistol Grip 0.5 hp. Direct-Drive Screwdriver Model: 53472, 53474, 53475, 53477 Notice: Use these instructions along with the tool manual. Important: Disconnect tool from the air supply. To avoid damage, use the Special Repair Tools designed for disassembly and assembly.
  • Page 2 HEAT Remove motor from housing: a) Carefully fasten 53339 Front Plate in vise with aluminum or bronze jaws. b) Notice: Motor is held by o-rings. Use HEAT GUN to warm and expand housing.
  • Page 3 Pull up and wiggle housing to release motor. Remove motor from housing.
  • Page 4 96232 Arbor Press Ø 1/4" or 6 mm flat punch 96346 Bearing Separator Fasten 96346 Bearing Separator (2") around 52046 Cylinder. Place separator and motor in 96232 Arbor Press (#2) with rotor spindle pointing down. Use a Ø 1/4" or 6 mm flat-end drive punch to push rotor out of 02649 Bearing.
  • Page 5 96213 Bearing Removal Tool Use 96213 Bearing Removal Tool and arbor press to remove 02649 Bearing from 52044 Rear Plate.
  • Page 6 Use arbor press and separator to remove rotor from front bearing and plate. Remove 02651 Bearing, 53339 Front Plate, shims, and 53337 Spacer.
  • Page 7 96214 Bearing Removal Tool Use 96214 Bearing Removal Tool to push 02651 Bearing and 96556 Wave Washer out of 53339 Front Plate. Remove shims from plate.
  • Page 8 Motor disassembly completed. Clean and inspect parts for wear or damage.
  • Page 9 Motor Assembly: Select .003" (~0.08 mm) shim thickness from 53397 Shim Pack. • Place shims into 53339 Front Plate. • Install 02651 Bearing.
  • Page 10 96239 Bearing Press Tool Install 53337 Spacer onto rotor. Use RAISED INSIDE DIAMETER of 96239 Bearing Press Tool and arbor press to install; 53339 Front Plate, shims and 02651 Bearing. Notice: Use a socket on top of 96239 to extend depth of press tool.
  • Page 11 .001"-.0015" (~0.03-0.04 mm) By hand, move front plate forward away from rotor. Check clearance between rotor and front plate. Use a .001" (~0.03 mm) thick feeler gauge. Notice: Clearance should be .001"-.0015" (~0.03-0.04 mm). If rotor/plate clearance needs further adjustment, repeat steps 1-3. Remove, or add shims as required.
  • Page 12 Oil 01057 Vanes with 95842 Dynabrade Air Lube 10W/NR or equivalent and install in rotor.

  • Page 13: Air Inlets

    96240 Bearing Press Tool AIR INLETS JUST TOUCH AIR EXHAUST 96239 Bearing Press Tool Use RAISED INSIDE DIAMETER of 96239 Bearing Press Tool to support 02651 Bearing. Use RAISED INSIDE DIAMETER of 96240 Bearing Press Tool and arbor press to install 02649 Bearing. Notice: Press bearing and plate down until it just touches the cylinder.
  • Page 14 96556 Wave Washer Install 96556 Wave Washer into 53339 Front Plate.
  • Page 15 96583 O-Rings (3) Install 96583 O-Rings (3) into housing. Apply oil to O-Rings. Use 95842 Dynabrade Air Lube 10W/NR or equivalent.
  • Page 16 MOTOR LINE-UP MOTOR HOUSING Line-up motor pin with groove in Housing. • Install motor.
  • Page 17 80" (2.04 mm) 53339 Front Bearing Plate should stand ~.080" (2.04 mm) beyond edge of housing. Motor assembly completed.
  • Page 18 Planetary Gear Disassembly: NOTICE: Use these instructions along with the tool manual. Apply similar steps to double gear reduction models: 53472 and 53474. 2.5 mm Use a 2.5 mm hex key to remove 96467 Set Screw. Turn counterclockwise.
  • Page 19 By hand, push spindle with gear assembly out of housing.
  • Page 20 96214 Bearing Removal Tool 96346 Bearing Separator BEVELED SIDE Use 96346 Bearing Separator and 96214 Bearing Removal Tool to remove the 02651, 01036 or 53330 Bearing from carrier. IMPORTANT: Always position flat side of carrier toward the ring gear and beveled side toward the bearing. Remove gears from carrier.
  • Page 21 Tap carrier on a hard surface so shafts fall out of carrier. Remove gears.
  • Page 22 To disassemble “Quick Chuck”, fasten carrier with spindle pointing up in vise with aluminum or bronze jaws. Use a small screwdriver or pick to remove 96592 Snap Ring.
  • Page 23 Remove all “Quick Chuck” components: 96592 Snap Ring, 53357 Washer, 53359 Spring, 53356 Sleeve, and 53358 Ball.
  • Page 24 Use arbor press and bearing separator to remove 01036 Bearing. Planetary gear disassembly completed. Clean and inspect parts for wear or damage.
  • Page 25 Planetary Gear Assembly: To install 01036 Bearing onto carrier spindle, use a 15 mm deep-well socket as a press tool along with arbor press.
  • Page 26 With spindle pointing up, fasten carrier in vise with aluminum or bronze jaws. • Install 53358 Ball into carrier.
  • Page 27 Install 53356 Sleeve and 53359 Spring onto carrier spindle.
  • Page 28 Install 53357 Washer and 96592 Snap Ring onto carrier spindle.
  • Page 29 Use a small screwdriver and push down on 96592 Snap Ring and 53357 Washer to fasten snap ring into groove in spindle.
  • Page 30 Pull up on 53356 Sleeve to check operation.
  • Page 31 Apply 95542 Grease or equivalent to gears and bearings.
  • Page 32 Install gears and 53182 Shafts into carrier.
  • Page 33 • 96239 Bearing Press Tool (02651 Bearing) • 15 mm Deep Well Socket (01036 & 53330 Bearings) To install 02651 Bearing onto carrier, use arbor press and 96239 Bearing Press Tool. To install 01036 or 53330 Bearing onto carrier, use arbor press and a 15 mm deep well socket as a press tool.
  • Page 34 53385 Ring Gear Gear Housing 10. Install ring gear so that openings will line-up with set screw and lube fitting openings in gear housing.
  • Page 35 11. Install gear assembly in gear housing. IMPORTANT: Models 53472 and 53474, install 53188 Spacer before installing second planetary assembly. (See Tool Manual) IMPORTANT: Models 53474 and 53477 (with 53330 Bearing) install 53334 Spacer between planetary and motor assemblies. (See Tool Manual)
  • Page 36 12. Use a small screwdriver to rotate and line-up ring gear openings with openings in gear housing.
  • Page 37 Loctite #567 2.5 mm Hex Key 13. Apply a small amount of #567 Loctite to thread of 96467 Set Screw. Use a 2.5 mm hex key to install set screw. Planetary gear assembly completed.
  • Page 38 Final Assembly: #243 Loctite Apply #243 Loctite or equivalent to threads on gear housing.
  • Page 39 Torque to 28 N•m/~250 lbs. in. 1-9/16" (~40 mm) crowfoot Protective Padding Use protective padding around housing and fasten “Driver” in vise with spindle pointing up. Use a 1-9/16" (~40 mm) crowfoot or adjustable wrench to fasten gear housing. Turn clockwise. Torque to 28 N•m/~250 lbs. in. Initially, use 95541 Lubricant Gun to apply three plunges of 95542 Grease through 01041 Lube Fitting.

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