Motor Assembly/Disassembly Instructions - Dynorbital -Spirit
™
Important: Manufacturers warranty is void if tool is disassembled before warranty expires.
A Full Service Repair Kit P/N
57098
, is available which includes special repair tools for correct disassembly/assembly of the sander.
To Disassemble
1.
Disconnect sander from air supply.
2.
Invert the sander, and place the
57092
Repair Collar (supplied in the
57098
Full Service Repair Kit) around the housing and secure in a vise. Padding
can be used on the vise jaws to protect the housing.
Important:
Do not over tighten the sander in the vise. If the sander is held too tight the
removal of the lock ring and air motor will be difficult.
3.
Remove sanding pad with the
50679
26 mm Open-end Wrench (supplied with the sander).
4.
Insert
56058
Lock Ring Tool (supplied in
57098
Full Service Repair Kit) into the corresponding tabs of lock ring. Loosen the
59058
Lock Ring
turning it counterclockwise.
5.
Remove the
59058
Lock Ring and the
50659
O-Ring from the air motor assembly (3/32" and 3/16" dia. orbits only).
6.
Remove
01024
O-Ring and
98463
Retaining Ring from motor assembly.
7.
Fasten a 2 in. bearing separator (P/N
96346
available) around the
59051
Cylinder just below the
59077
Rear Bearing Plate. Place the air motor
assembly in a #2 arbor press (P/N
96232
available) so that the separator is resting on the table of the arbor press and with the balancer pointing down.
8.
Use a flat nose 3/16" dia. drive punch as a press tool. Place it against the small end of the motor shaft balancer and push the shaft out of the
upper
58368
Bearing.
9.
Remove the rotor, vanes and rotor key from the motor shaft balancer.
10.
Again fasten the 2 in. bearing separator between remaining
59076
Front Bearing Plate/
58368
Bearing and the top of the balancer. Rest the separator
on the table of the arbor press and push the motor shaft out of the
58368
Bearing.
11.
Disassemble the balancer assembly as follows:
a.)
Place motor shaft assembly into a soft jaw vise. Using a thin screwdriver, pick out the end of
95630
Snap Ring and peel out. This will loosen the
balancer assembly.
b.)
Screw the threaded portion of the
56056
Bearing Puller (supplied in
57098
Repair Kit) into the
57069
Balancer Shaft and heat the outside of the
motor shaft balancer to approximately 200° F (approximately 10 seconds with a propane torch). Now, using the slider weight, pull
the assembly out.
c.)
Press off
56052
Bearing with a bearing separator and remove bearing seal and bearing shield.
12.
If during step 11, the
56052
Bearing remains in the motor shaft balancer, it can be removed by the heating the shaft balancer again and using either an
inside bearing puller or a blind hole bearing puller.
To Assemble:
Important:
Be certain parts are clean and in good repair before assembling.
1.
Assemble the balancer assembly as follows:
a.)
Install
95630
Snap Ring onto balancer shaft. Install
95628
Shield with convex face toward hex of balancer shaft.
b.)
Install
56053
Seal.
Note:
Be certain seal is pressed completely over shaft step.
c.)
Apply 1 drop of #271 Loctite
®
(or equivalent) and spread over several places around inside diameter of
56052
Bearing and the outside diameter
of the
57069
Balancer Shaft.
d.)
Press fit
56052
Bearing with seal side toward hex of balancer shaft up to shaft step as shown in
Drawing 1
. This must be a firm press fit for
proper retention of bearing.
2.
Place the motor shaft balancer in a soft jaw vise with large end-up.
3.
Apply 1 drop of #609 Loctite
®
(or equivalent) and spread over several places around the outside diameter of the
56052
Bearing and slide balancer
assembly into the motor shaft balancer until
56052
Bearing are firmly seated at bottom. Squeeze
95630
Snap Ring into groove in motor shaft balancer
to complete the assembly. Remove from vise. Place
50659
O-Ring and
59058
Lock Ring onto the motor shaft balancer (3/8" orbit models only).
4.
Apply 1 drop of #609 Loctite
®
(or equivalent) and spread around lower area of motor balancer shaft where the front
58568
Bearing will be located.
5.
Install
58368
Bearing onto the motor shaft balancer down to the shoulder as shown in
Drawing 2
.
6.
Press
59076
Front Bearing Plate onto
58368
Bearing as shown in
Drawing 3
and check for smooth rotation.
7.
Install the
98451
Rotor Key and
57090
Rotor on the motor shaft balancer. Place the
56073
Vanes into the rotor slots.
Note:
Vanes should be lubricated with Dynabrade Air Lube P/N
95842
(or equivalent) before installation.
8.
Place
59051
Cylinder Assembly over rotor. The “short” line-up post goes toward the front bearing plate.
9.
Place
58368
Bearing into
59077
Rear Bearing Plate. Apply 1 drop of #609 Loctite
®
(or equivalent) and spread around inside diameter of
58368
Bearing.
(Continued on next page.)
7
57091
Bearing Press Tool
Balancer Shaft Assembly
56052
Bearing
Shaft Step
Bearing Seal and
Bearing Shield
Drawing 1
Balancer Shaft Assembly
Motor Shaft Balancer
58368
Bearing
57091
Bearing Press Tool
Drawing 2
Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade
Buy parts on line at https://Dynashop.co.uk/ for all things Dynabrade
