Dynabrade Wet Dynafile II, Operating Instructions

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Disassembly/Assembly Instructions - Wet Dynafile
II
Important: Manufacturer’s warranty is void if tool is disassembled before warranty expires.
A Motor Repair Kit (95604) is available which contains special tools for disassembly/assembly. Please refer to parts breakdown for part identification.
To Disassemble:
1. Remove Belt Guard, abrasive belt and contact arm assembly.
2. Loosen 01788 Screw and remove housing assembly from air motor.
3. Loosen 95427 Screw and remove 40366 Guide, this will release 40361 Tension Arm and 95426 Spring.
4. Remove 40367 Dust Cover. Remove 95217 Screw, 95425 Screw and 40362 Support Rod.
Motor Disassembly:
1. Secure tool in a soft jaw vise holding onto wrench flats on rear of motor housing. Important: Do not over tighten vise or housing could be damaged.
2. Remove drive wheel by inserting a 4 mm hex key through drive wheel and into the end of the rotor/drive shaft.
3. Using a wrench (14 mm) or pliers, twist the drive wheel counterclockwise and remove.
4. Secure lock ring with a wrench and twist from motor housing ( Note: Left hand threads).
5. Remove 42636 Spindle from planetary gear assembly.
6. Pull planetary gear assembly from motor housing. Pull motor from housing (if motor does not pull out freely, lightly tap end of housing with a rubber mallet).
7. Clamp a bearing separator between the 54522 Ring Gear of the planetary carrier assembly and front 54520 Bearing (nearest to spindle end of assembly).
Press bearing from carrier.
8. Remove ring gear and gears. Press rear 54520 Bearing from planetary carrier.
9. Press rotor from 02649 Bearing and front bearing plate. Remove spacer, cylinder and blades from rotor. Press 11016 Bearing from rear bearing plate.
10. Remove 54505 Plug from motor housing. Remove valve assembly.
11. Remove 95713 Inlet Adapter. Pry retaining ring from rear of housing and remove 04020 Muffler and 95584 O-Ring.
Motor disassembly complete.
Motor Reassembly:
Important: Be sure parts are clean and in good repair before reassembly. Follow all torque, grease and lubrication instructions.
1. Insert a .002" shim from 54529 Shim pack into front bearing plate.
2. Insert 02649 Bearing into front bearing plate.
3. Place 54515 Spacer onto pinion end of rotor. Make sure countersink faces rotor.
4. Press from bearing plate assembly onto rotor until tight against spacer.
5. Check clearance between rotor and bearing plate. Apply an outward (pulling) pressure on rotor. If rotor rubs bearing plate, reduce the spacing by removing
shim or substitute with .001" shim.
6. Insert 54514 Blades (lubricate blades with Dynabrade Air Lube P/N 95842 or equivalent before installation).
7. Place cylinder over rotor. Be sure pin holes and air inlet holes align with holes in bearing plate.
8. Press 11016 Bearing into rear bearing plate and press assembly onto rotor. Be sure pin holes and air holes line up with holes in cylinder.
9. Insert motor assembly into housing. The pin in front bearing plate should enter guide slot in housing wall.
10. Install 54517 Spacer with unrelieved face towards front bearing plate.
11. Press 54520 Bearing onto front end of planetary carrier. Replace gears, gear shafts and ring gear (notches face rear of carrier).
12. Press 54520 Bearing onto carrier (there should be a slight drag between ring gear and bearings).
13. Install planetary assembly onto motor housing. Line-up notches in ring gear with hole in housing for lock screw.
14. Install 42637 Lock Ring onto motor housing.
15. Install O-rings and spring stem assembly and replace into motor housing.
16. Install 95584 O-Ring onto muffler and replace into housing. Replace snap ring and inlet adapter.
17. Install drive wheel.
Motor reassembly complete.
To Reassemble:
1. Place 40362 Support Rod into housing.
2. Apply one drop of #271 Loctite® (or equivalent) to 95217 Screw and tighten.
3. Install 40637 Dust Cover onto 40362 Support Rod. Lubricate (grease) inside of 40362 Support Rod and 40361 Tension Arm.
4. Install 95426 Spring into 40362 Support Rod and place 40361 Tension Arm over 95426 Spring.
5. Place 40366 Guide onto 95427 Screw, apply one drop of #271 Loctite® (or equivalent) to screw threads.
6. Compress tension arm and secure in place with 40366 Guide/ 95427 Screw. Adjust 95427 Screw so that 40361 Tension Arm slides freely.
7. Press 40025 Button onto 95425 Screw and apply one drop of #271 Loctite® to threads.
8. Place 40365 Belt Guard over 40360 Housing, tighten 95425 with 40025 Button into 40360 Housing
9. With 40373 Motor lock in place, install air motor assembly into housing and secure in place with 95311 Screw.
10. Complete assembly by installing contact arm assembly, abrasive belt and 40365 Belt Guard.
Tool assembly is complete. Please allow 30 minutes for adhesives to cure before operating tool.
Important:
Motor should now be tested for proper operation at 90 PSI. If motor does not operate properly or operates at a higher RPM than marked on the
tool, the tool should be serviced to correct the cause before use. Before operating, place 2-3 drops of Dynabrade Air Lube (P/N 95842 ) directly into air inlet
with throttle lever depressed. Operate tool for 30 seconds to determine if tool is operating properly and to allow lubricating oils to properly penetrate motor
Loctite® is a registered trademark of Loctite Corp.