Dynabrade 52900 Посібник з експлуатації та технічного обслуговування - Сторінка 5
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Disassembly/Assembly Instructions for 3"X 24" Belt Sander
Important: Manufactures warranty is void if machine is disassembled before warranty expires.
The special repair tools referred to in these instructions can be purchased from Dynabrade Inc. Please refer to the exploded view of this machine
for proper part identification.
Motor Disassembly:
1. Shut the air supply and disconnect the machine from the air supply hose.
2. Release the belt tension and remove the abrasive belt.
3. Use a 2.5mm hex key to remove the 96030 Screws (2) and the 31636 Cover Plate.
4. Use a Phillips
®
screwdriver to remove the 31678 Screw and the 31646 Belt Guard.
5. Use a small thin flat blade screwdriver to remove the 31661 Snap Ring.
6. Remove the 31645 Timing Belt. Important: Carefully check the condition of the timing belt, the timing belt pinion and the timing belt gear. Also, check
the condition of the related drive mechanism. Service as required.
7. Use a 5mm hex key to remove the 01790 Screws (5), the 01791 Washers (5), the 31637 Motor Cover and the 31638 Motor Gasket.
8. Carefully push/pull the motor assembly out of the 31650 Housing.
9. Fasten a 4
5
/
" bearing separator around the back portion of the 54976 Cylinder, (area closest to the 54977 Rear Bearing Plate).
8
10. Position the motor along with the attached bearing separator in the 96323 Arbor Press (#2) so that the 31634 Timing Belt Pinion is pointing down.
Note: Additional blocking may be required between the separator and the table of the arbor press to allow clearance for disassembling the motor.
11. Use a short flat end press tool to push the 31631 Rotor out of the 02651 Bearing.
12. Remove the 54972 Vanes (5), the 02651 Bearing, and the 07158 Spacer.
13. Hold the rotor in a vise equipped with aluminum or bronze jaws so that the timing belt pinion is pointing up.
14. Use a non-marring strap wrench to remove the timing belt pinion by turning it clockwise. (Left Hand Thread) Remove the 31644 Washer.
15. Use an adjustable open-end wrench to remove the 31633 Rotor Nut by turning it clockwise. (Left Hand Thread)
16. Remove the 31632 Front Bearing Plate, the 02552 Bearing, the 01277 Shims, and the 52467 Spacer.
Motor Disassembly Complete.
Important: Clean and inspect motor parts for wear or defect before assembling.
Motor Assembly:
1. Hold the rotor in a vise equipped with aluminum or bronze jaws so that the threaded spindle is pointing up.
2. Install the 52467 Spacer onto the rotor.
3. Install the 31632 Front Bearing Plate and the 02552 Bearing onto the rotor.
4. Install the 31633 Rotor Nut hand tight by turning it counterclockwise. (Left Hand Thread)
5. Check the fit between the front of the rotor and the face of the bearing plate. The clearance should be .001"- .0015" (0.3mm – 0.4mm).
Note: A .001" (0.3mm) feeler gauge can be used to check the clearance. If the fit is too loose, remove the rotor nut and select a .001" (0.3mm) thick
shim from the 01277 Shim Pack. Place the .001" (0.3mm) shim in between the 02552 Bearing and the inside of the 31633 Front Bearing Plate. Install
these components onto the rotor and make the rotor nut hand tight to hold them in place. Check the clearance. Repeat this process as necessary until
the correct clearance is established.
6. With correct clearance established, use a 22mm crowfoot/torque wrench and tighten the 31633 Rotor Nut. (Torque to 17N·m/150 in. lbs.)
7. Position the rotor in the vise equipped with aluminum of bronze jaws so that the threaded spindle is pointing up. Install the 31644 Washer and
the 31634 Timing Belt Pinion. (Left Hand Thread) Tighten with a non-marring strap wrench. (Torque to 17N·m/150 in. lbs.)
8. Apply the 95842 Dynabrade Air Lube (10W/NR of equivalent) to the vanes. Install vanes with the curved side toward the center of the rotor.
9. Install the 54976 Cylinder so that the line-up pin fits into the hole in the front bearing plate.
10. Install the 54977 Rear Bearing Plate and the 02651 Bearing. Note: Use the 96239 Bearing Press Tool so that the raised center portion is positioned
against the inner race of the 02651 Bearing. Use the 96232 Arbor Press (#2) to carefully press the bearing down until it touches against the bearing seat
on the inside of the rear bearing plate. This should create a snug fit between the bearing plates and the cylinder. Note: A "snug fit" allows the cylinder to
be shifted from side to side with slight finger pressure while still trapping the cylinder so that it is not loose or sloppy between the bearing plates.
11. Apply a small amount of petroleum grease to the exposed shield of the 02552 Bearing and then install the 52467 Spacer over the timing belt pinion and
washer. Position the spacer so that it is centered on the 02552 Bearing and the grease sticks it to the bearing.
12. Carefully install the motor into the 31650 Housing using the line-up pin as a guide for positioning the motor correctly in the housing.
13. Install the 31638 Gasket, and the 31637 Motor Cover with the 01790 Screws (5), and the 01791 Washers (5). Use a 5mm hex key to fasten these
components. (Torque to 9N·m/80 in. lbs.)
14. Add several drops of the 95842 Dynabrade Air Lube (10W/NR or equivalent) through the air inlet fitting, connect the machine to the air supply hose,
and turn on the air supply to test run the air motor.
15. Shut the air supply and disconnect the machine from the air supply hose.
16. If the air motor functions properly, install the 31645 Timing Belt and the 31661 Snap Ring. Carefully rotate the timing belt and gear mechanism by hand
to check for smooth operation and proper belt tracking. Important: If the air motor does not function properly, disassemble and make the necessary
adjustments. If the timing belt and the related drive mechanism does not function properly, disassemble and make the necessary adjustments.
17. Use a Phillips
®
screwdriver to install the 31678 Screw and the 31646 Belt Guard.
18. Use a 2.5mm hex key to install the 96030 Screws (2) and the 31636 Cover Plate.
19. Install the abrasive belt and apply the belt tension.
20. Add several drops of the 95842 Dynabrade Air Lube (10W/NR or equivalent) through the air inlet fitting, connect the machine to the air supply hose,
and turn on the air supply.
21. With the machine off the work surface, carefully run and track the abrasive belt.
Motor Assembly Complete. Sander Assembly Complete. Please allow 30 minutes for adhesives to cure before operating tool.
Important: Motor should now be tested for proper operation at 90 PSIG. 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 permeate motor.
Loctite
®
is a registered trademark of Loctite Corp.