Dynabrade 10746 Sécurité, fonctionnement et entretien - Page 5
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Important: The manufactures warranty is void if the tool is disassembled before the warranty expires. Use these instructions in conjunction with the Part Number
57260 Tool Repair Kit. This kit includes special tooling for the proper disassembly/assembly of the Dynorbital Buffer. This Tooling will be referred to in these
instructions. An air motor Tune-Up Kit, Part Number 98220 is also available. It contains the high and medium wear components that most
commonly need replacement.
Motor Disassembly:
1. Disconnect the sander from the air supply.
2. Use the 57092 Repair Collar to hold the sander in a vise. Position the sander so that the sanding pad is facing up. Note: Do not tighten the collar and sander in the vise.
Only hold the sander snugly, so that the motor lock ring can be removed easily.
3. Use the 50679 26mm Open End Wrench to remove the sanding pad from the sander by holding the 57069 Balancer Shaft stationary and turning the pad counterclockwise.
4. Use the 56058 Lock Ring Tool to remove the 56046 Lock Ring by turning it counterclockwise.
5. Pull the air motor assembly out of the sander housing.
6. Use the retaining ring pliers to remove the 95626 Retaining Ring.
7. Remove the 01020 O-Ring from the 56595 Cylinder and fasten a 2" bearing separator around the part of the cylinder that is closest to the 54629 Rear Bearing Plate.
8. Place the air motor with the bearing separator attached onto the 96232, #2 Arbor Press so that the counter-balance is hanging down from the table of the arbor press.
9. Use a 5/16" dia. flat end drive punch as a press tool to push the motor shaft balancer out of the 01206 Bearing. Use 96213 Bearing Removal Tool to push the
01206 Bearing out of the 54629 Rear Bearing Plate.
10. Remove the cylinder, rotor, vanes, key and the 54630 Front Bearing Plate.
11. Use a 2" bearing separator and arbor press to remove the 02695 Bearing.
12. Fasten the counterweight of the motor shaft balancer in a vise with aluminum or bronze jaws so that the 57069 Balancer Shaft is pointing up.
13. Use a small flat blade screwdriver to remove the 95630 Snap Ring.
14. Use the 56056 Bearing Puller to remove the balancer bearing assembly.
15. Fasten the separator between the 57069 Balancer Shaft and the 95628 Washer.
16. Place the bearing separator on the table of the arbor press so that the hex end of the 57069 Balancer Shaft is pointing down. Use the 5/16" flat end drive punch as a
press tool to push the balancer shaft out of the 56052 Bearing. Remove the 56053 Bearing Seal and the 95628 Bearing Shield.
Motor Disassembly Complete.
Motor Assembly:
Important: Clean and inspect all motor parts for wear or defect.
1. Balancer Assembly:
a.) Install the 95630 Snap Ring onto the 57069 Balancer Shaft.
b.) Install the 95628 Bearing Shield onto the balancer shaft so that the convex side is toward the hex portion of the balancer shaft.
c.) Install the 56053 Bearing Seal so that it fits down completely over the shaft step.
d.) Apply a small amount of the Loctite #271 (or equivalent) to the bearing surface of the 57069 Balancer Shaft.
e.) Orient the seal side of the 56052 Bearing toward the hex portion of the balancer shaft. Use the large end of the 57091 Bearing Press Tool along with the 96232,
#2 Arbor Press to push the 56052 Bearing onto the balancer shaft until it fits against the shaft step. (Drawing 1)
2. Fasten the counterweight of motor shaft balancer in a vise with aluminum or bronze jaws so that the bearing pocket is pointing up.
3. Apply a small amount of the Loctite #271 (or equivalent) to the outside diameter of the 56052 Bearing. Slide the balancer shaft/bearing assembly all the way into the
bearing pocket of the motor shaft balancer. Secure this assembly in the motor shaft balancer by squeezing the 95630 Snap Ring into the groove in the
motor shaft balancer.
4. Install the 56046 Lock Ring onto the motor shaft balancer so that the "OFF" inscription is toward the counterweight of the shaft.
5. Use the small end of the 57091 Bearing Press Tool and the arbor press to install the 02695 Bearing all the way onto the motor shaft balancer. (Drawing 2)
6. Install the 54630 Front Bearing Plate onto the 02695 Bearing and check it for smooth rotation. (Drawing 3)
7. Install the 54673 Key and 54705 Rotor/Blade Set (5) onto the motor shaft balancer.
8. Apply the 95842 Dynabrade Air Lube (10W/NR or equivalent) to the blades.
9. Install the 56595 Cylinder over the rotor so that the short line-up pin fits into the front bearing plate.
10. Place the 54629 Rear Bearing Plate over the shaft so that the long line-up pin fits through the hole in the rear bearing plate. Use the small end of the 57091 Bearing
Press Tool to install the 01206 Bearing onto the motor shaft balancer and into the 54629 Rear Bearing Plate. Use the press tool and the arbor press to install these so
that there is a snug fit between the bearing plates and the cylinder. Note: Carefully press the 01206 Bearing onto the motor shaft balancer. (Drawing 4)
11. Use retaining ring pliers to install the 95626 Retaining Ring so that the concave side of the ring is toward the motor assembly.
Note: Be sure that the retaining ring is completely pressed down into the groove on the shaft.
12. Use the 57092 Repair Collar to hold the housing in a vise so that the opening for the motor is facing up.
13. Apply a small amount of petroleum lubricant to the 01020 O-Ring and install the o-ring into the air inlet hole in the cylinder.
14. Install the motor assembly into the housing making sure to align the line-up pin with the line-up hole that is on the inside of the housing.
15. Use the 56058 Lock Ring Tool to secure the motor in the housing. (Torque to 34 N·m/300 in. lbs.)
16. Install the appropriate shroud and weight-mated sanding pad.
Motor Assembly Complete.
Handle and Valve Disassembly:
1. Place the 57092 Repair Collar around the housing so that the handle is pointing up.
2. Use a Phillips screwdriver to remove the four screws that fasten the handle to the housing. Carefully pull the handle from the housing. This provides access to the tip
valve components, also the handle; o-ring, gasket, muffler clip, muffler disc and felt silencer.
3. Use a 1/8" dia. flat end drive punch to remove the 95627 Pin and the 56582 Safety Throttle Lever Assembly.
4. Pull the 56578 Regulator and valve stem out of the housing.
Handle and Valve Disassembly Complete.
Handle and Valve Assembly:
1. Place the 57092 Repair Collar around the housing so that the handle mounting area is facing up.
2. Install the 01025 O-Rings (3) onto the 56578 Regulator, apply a small amount of petroleum lubricant to the o-rings and insert the regulator assembly into
the housing. Note: Be careful that the o-rings do not get caught and pulled out of the o-ring grooves.
Disassembly/Assembly Instructions
(continued text and diagrams on next page)