Download
Share
Print this page
Dynabrade 51520 Disassembly/Assembly
  1. Manuals
  2. Brands
  3. Dynabrade Manuals
  4. Sander
  5. 51520
  6. Disassembly/assembly

Dynabrade 51520 Disassembly/Assembly

Wet, stone polisher
Hide thumbs

Advertisement

Quick Links

Download this manual
Model: 51520
Important: Use these instructions along with tool parts page or manual.
Notice:
Shut off air supply and depress throttle lever to deplete air.
Disconnect tool from air supply hose.
Shut off water supply faucet and disconnect.
Remove all accessories (abrasive product, backup disc, and flanges) from tool.
Motor Disassembly:
1.
Push against collar of 96227 Fitting and pull 95579 Water Line tubing from fitting.
Disassembly Instructions - Wet, Stone Polisher

Advertisement

loading
Need help?

Need help?

Do you have a question about the 51520 and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Dynabrade 51520

Summary of Contents for Dynabrade 51520

  • Page 1 Disassembly Instructions - Wet, Stone Polisher Model: 51520 Important: Use these instructions along with tool parts page or manual. Notice: Shut off air supply and depress throttle lever to deplete air. Disconnect tool from air supply hose. Shut off water supply faucet and disconnect.
  • Page 2 3 mm hex key Install 95492 Screws (5/16"-18 SHC) in two handle bosses on housing. Fasten 95492 Screws in vise to hold tool with 51546 Valve Body pointing up. Use a 3 mm hex key to remove 96296, 95916 Screws along with 01211 Lock Washers.
  • Page 3 Remove motor form housing.
  • Page 4 96346 Bearing Separator Fasten 96346 Bearing Separator (2") around 01028 Cylinder. Place assembly in 96232 Arbor Press (#2) with pinion pointing down. Use a Ø 1/4" drive punch to push 02373 Rotor out of 02649 Bearing.
  • Page 5 96213 Bearing Removal Tool NOTICE: In the same way, use bearing separator, arbor press and 96213 Bearing Removal Tool, to remove 02649 Bearing from 01732 Rear Bearing Plate. Save parts.
  • Page 6 Fasten 02373 Rotor in vise with aluminum or bronze jaws, with pinion pointing up. Use an adjustable hook spanner wrench to remove 51513 Pinion Gear. Turn counterclockwise. Remove front bearing, plate, spacer and shims. Motor disassembly completed. Clean and inspect parts for wear or damage. Save and reuse good parts.
  • Page 7 Right Angle Gear Disassembly: HEAT Install 95492 Screws (5/16"-18 SHC) in two handle bosses on housing. Fasten 51545 Housing in vise with spindle pointing up. Use a HEAT GUN to warm housing. Use an adjustable pin spanner wrench to remove 51551 Spindle Retainer. Turn clockwise.
  • Page 8 Loosen vise and remove housing. Remove 96584 O-Ring. Remove spindle and bevel gear assembly. Remove 98243 Wave Spring.
  • Page 9 96346 Bearing Separator Fasten 96346 Bearing Separator (2") under 02057 Bearing. Place assembly in 96232 Arbor Press (#2) with threaded end of spindle pointing down. Use a Ø 3/16" drive punch to push spindle out of 02057 Bearing. NOTICE: In the same way, use bearing separator and arbor press to remove 51514 Gear and 02685 Bearing.
  • Page 10 Assembly Instructions - Wet, Stone Polisher Motor Assembly: Install 01010 Spacer onto rotor. Install .003" (~0.08 mm) shim thickness into 02375 Front Bearing Plate. Install 01007 Bearing into front bearing plate. Install bearing and plate onto rotor.
  • Page 11 .001"-.0015" (~0.03-0.04 mm) Install 51513 Pinion Gear hand tight. Place end of pinion gear against a solid surface. Push down on front bearing plate. Use a .001" (~0.03 mm) thick feeler gauge to check clearance between rotor and plate. Notice: Clearance should be .001"-.0015" (~0.03-0.04 mm). If rotor/plate clearance needs further adjustment, repeat steps 1 and 2.
  • Page 12 Torque to 17 N•m/~150 lbs. in. Fasten 02373 Rotor in vise with aluminum or bronze jaws. Use an adjustable hook spanner wrench to tighten 51513 Pinion Gear. Torque to 17 N•m/~150 lbs. in.
  • Page 13 Apply 95842 Dynabrade Air Lube or equivalent to 01185 Vanes. Install vanes into rotor.
  • Page 14 96240 Bearing Press Tool Use RAISED OUTSIDE DIAMETER of 96240 Bearing Press Tool to install 02649 Bearing into 01732 Rear Bearing Plate.
  • Page 15 96240 Bearing Press Tool JUST TOUCH Use RAISED INSIDE DIAMETER of 96240 Bearing Press Tool and arbor press to install 02649 Bearing and rear bearing plate onto rotor. Carefully press bearing and plate down until plate just touches cylinder. This will produce a close fit between bearing plates and cylinder.
  • Page 16 HEAT Use a HEAT GUN to warm and expand housing.
  • Page 17 51560 Spacer Use 51560 Spacer as a guide to position and install air motor.
  • Page 18 01024 O-Ring 51552 Gasket Install 01024 O-Ring and 51552 Gasket.
  • Page 19 51569 Spacer 01024 O-Ring 51113 Gasket 51568 Spacer 51560 Spacer • 10. Install 51560 Spacer, 51569 Spacer & 01024 O-Ring, 51113 Gasket & 51568 Spacer.
  • Page 20 Torque to 4.5 N•m/~40 lbs. in. 11. Install 51546 Valve Body assembly. Use 3 mm hex key to install 96296 & 95916 Screws with 01211 Lock Washers. Torque to 4.5 N•m/~40 lbs. in. Important: Check operation of air motor. Connect tool air inlet, to an air supply that delivers a maximum of 90 PSIG (6.2 Bar) operating air pressure.
  • Page 21 Right Angle Gear Assembly: Notice: To remove 95913 Seals. Soak 51551 Spindle Retainer with old seals in a closed container of acetone overnight. Seals will be released from retainer.
  • Page 22 Install first 95913 Seal so that open-side will face toward inside of 51545 Housing. To install seal use Ø 1½" (~38 mm) press tool against OUTSIDE EDGE of seal. Use 96232 Arbor Press to push seal all the way into 51551 Spindle Retainer. Ø...
  • Page 23 ACETONE To install second seal, use acetone to clean inside Ø of 51551 Spindle Retainer and outside Ø of 95913 Seal. Apply a bead of Loctite #380 Black Max or equivalent to outside Ø of seal. Loctite #380 Black Max...
  • Page 24 LEVEL Apply 95848 Gear Oil Install second 95913 Seal with open-side facing in toward first seal. Use Ø 1 " (~43 mm) press tool, FLAT against seal. Make seal level with surface of 51551 Spindle Retainer. Allow 30 minutes for adhesive to cure. Apply a small amount of 95848 Gear Oil to lip of each seal.
  • Page 25 Ø outside ~1.0781 (~27 mm) Use deep-well socket with Ø outside ~1.0781 (~27 mm) and arbor press. Install 02685 Bearing and 51514 Gear.
  • Page 26 Use 96242 Bearing Press Tool Press bearing level with end of spindle. Saturate using 95848 Gear Oil Saturate 53608 Wick using 95848 Gear Oil. Install 53608 Wick. Use RAISED INSIDE DIAMETER of 96242 Bearing Press Tool to install 02057 Bearing. Notice: Make bearing level with end of spindle.
  • Page 27 Install 98243 Wave Spring in housing. Use one to two 96554 Shims (.003"-.006" or ~0.08 - 0.15 mm) from 96570 Shim Pack and install into housing. By eye, line-up notch in 53608 Wick, with lobe in housing. Carefully install spindle assembly. Install 96564 O-Ring.
  • Page 28 Torque to 23 N•m/~200 lbs. in. Apply a small amount of Loctite #567 to threads on 51551 Spindle Retainer. Carefully install spindle retainer so as not to damage seals. Use an adjustable pin spanner wrench to fasten spindle retainer. Turn counterclockwise. Left Hand Thread. Torque to 23 N•m/~200 lbs. in.
  • Page 29 360° Fasten an adjustable wrench thumb tight onto flats of spindle. Rotate spindle forward and backward to check amount of backlash or free movement between gear teeth. There should be minimal free movement between teeth. Check 360° rotation of spindle and gear assembly. The correct fit should have minimal backlash without any restricted movement between gear teeth.