orbital sanding machine repair guide - · pdf fileorbital sander spare part kits 8 motor...

ORBITAL SANDING MACHINE REPAIR GUIDE

07/2007

Table of contents

Application Slide:

Orbital Sanders 343CV and 343DB 3

Orbital Sanders 353CV and 353DB 5

MPA1027 General service tool kit for OS 7

Orbital sander Spare Part Kits 8

Motor disassembly 9

Change of under bearings 23

Change of front end bearing 41

Motor assembly 51

Machine assembly 58

Change of air inlet 66

Change of speed valve 70

Change of muffler 83

Orbital Sanders 343CV and 343DB

OS343CV75 x 100 mm, 33 HCode: 8991600111

OS343DB75 x 100 mm, 33 HCode: 8991610111

Orbital Sanders 343CV and 343DB Parts

Orbital Sanders 353CV and 353DB

OS353CV81 x 133 mm, 54 HCode: 8991800111

OS353DB81 x 133 mm, 54 HCode: 8991810111

Orbital Sanders 353CV and 353DB Parts

MPA1027 General service tool kit for OS

Code: 8991606011

Service clamp T-7

Bearing separator

Service wrench T-6

Spindle bearing removerT-9

Bearing press sleeveT-13

Hex wrench 8 mm

Hex wrench 2,5 mm

End plate bearing tool T-8

Spindle puller T-12

T-2A

T-2B

T-3B

T-3A

Spindle bearing pressing tools:T-3A, T-3B, T-2A, T-2B

OS Spare Part Kits

MPA0805 10 000 opm Muffler kitfor OSCode:8993017211Contents: MPA0032 x 2, MPA0038, MPA0166

MPA0807 Spindle bearing kitfor 77mm ROS and 75x100mm OSCode:8993019611Contents: MPA0162, MPA0196, MPA0161, MPA0108, MPA0126, MPA0177

MPA0806 Spindle bearing kitfor 81x133mm/ 75x180mm/93x180mm OSCode: 8993019411Contents: MPA0016, MPA0017, MPA0018, MPA0020, MPA0035, MPA0193

MPA0798 Air inlet kitfor ROS and OSCode: 8993018811Contents: MPA0007, MPA0013, MPA0014, MPA0009

MPA0799 Endplate bearing kitfor ROS and OSCode: 8993019811Contents: MPA0019, MPA0040, MPA0021

MPA0800 Speed valve kit for ROS and OSCode: 8993019011Contents: MPA0008, MPA0015, MPA0039,MPA0043, MPB0014

MPA0801 Rotor, Vanes and Key kitfor ROS and OSCode: 8993017711Contents: MPA0010 x 5, MPA0041 MPB0005

Motor Disassembly

Remove the four screws holding the backing pad with the hex wrench 2,5mm tool.

Motor Disassembly

Apply the service clamp T7 to the bench vise

Motor Disassembly

Apply the sander to the service clamp and fasten it firmly.

Motor Disassembly

Remove the center screw with the hex wrench 4mm.

Motor Disassembly

Remove the four screvs holding the pad support with hex wrench 2,5mm.

Motor Disassembly

Remove the pad support and the spacer.

Motor Disassembly

Turn the machine around and remove the four screws holding the pad support assembly

Motor Disassembly

Remove the pad support assembly from the motor house.

Motor Disassembly

Apply the service wrench T-6 into position into the slots. Loosen the motor by turning the wrench anti-clockvise.

Motor Disassembly

Attach the spindle puller T12 to the motor. Attach the service wrench T-6 to the spindle puller T12.

Motor Disassembly

Pull the motor out of the house. It might help to loosen up the bench vice a little.

Motor Disassembly

Remove the motor top retaining ring.

Motor Disassembly

Release the under bearing plate cylinder & rotor and upper bearing plate from the motor shaft by a pulling device.

Motor Disassembly

1. Retaining ring

2. Bearing

3. Rear end plate

4. Pin

5. Cylinder assembly

6. O-ring

7. Vanes

8. Rotor

9. Key

10. Front endplate

11. Bearing

12. O-Ring

13. Lock ring

14. Shaft balancer1. 3.

2.

4.

5.

7.

8.

9.10.

11.

6.

12.

13.

14.

Change of under bearings


Apply the shaft balancer to the bench vice.


Remove the retaining ring (24)


Attach the spindle puller T12 to the shaft balancer (14). Attach the service wrench T-6 to the spindle puller T12. Pull out the spindle assembly from the balancer.


Remove the retaining ring from the bearing.


Apply the bearing separator under the washer. Disconnect the bearings from the spindle assembly.


Finally remove both bearings from the shaft with a pulling device.


14. SHAFT BALANCER

18. RETAINING RING

19. BEARING

20. SHIM

21. BEARING

22. SHIM

23. WASHER

24. RETAINING RING

25. SPINDLE ASSEMBLY

18. 22. 19. 20.

14..

21. 23. 25. 24.


Apply the Spindle assembly (25) into the T-3A tool.


Apply the washer (23) on the spindle assembly (25).


Apply the shim(22) on the spindle assembly (25).


Apply the bearing (21) on the spindle assembly (25).


Press the bearing into position by the bench vice or hydraulic press. Support the bearing with press tool T-2B when pressing.


Apply the shim (20) over the bearing.


Apply the second bearing (19).

Change of front end bearing

Apply the spindle assembly (25) into the shaft balancer (14).


Lock the spindle assembly to the shaft balacer with the retaining ring (24).


Apply the end plate to the press tool T-3A. Apply the bearing tool T-8 to the end plate.


Remove bearing from the end plate by nocking it out from the plate.


Apply the new bearing to the plate. Press it slightly to it’s position on the plate.


T-3B


Change of under motor bearing


Apply the bearing separator under the motor lock ring beneath the front and end plate. Pull and disconnect the bearing from the plate.


Finally remove the bearing from the shaft with a pulling device.


Apply the new bearing onto the shaft (14).


Apply the bearing pressing socket T-13 to the bearing inner race. Press or nock the bearing (11) gentle to it’s position.

Motor Assembly

Position the front end plate (10) to the bearing (11).

Motor Assembly

Apply the bearing pressing socket T-13 to the front end plate. Gentle! Press or nock the front end plate (10) to position on bearing (11).

Motor Assembly

Apply the key (9) to the shaft (14).

Motor Assembly

Apply the rotor (8) to the shaft (14). Replace the rotor / vanes (7) if damaged or vorned out

Motor Assembly

Mount the cylinder (5) to its position.

Motor Assembly

Apply rear end plate (3) with bearing (2), to the motor. Nock the bearing and rear end plate to position. Apply the O-Ring (6) to the cylinder (5).

Motor Assembly

Apply and lock the retaining ring (1).

Machine Assembly

Apply the motor to the machine frame.

NOTE! The pin (4) shall fit into the grove on the machine frame.

Machine Assembly

Apply the lock ring (13) over the motor.

Machine Assembly

Fasten the the motor to the body with the service wrench tool by turning it clockwise.

Machine Assembly

Apply the pad support assembly (41) into the house and fasten them with the hex wrench 2,5mm tool.

Machine Assembly

Apply the spacer (27) on top of the motor.

Machine Assembly

Apply the pad backing on top of the motor. Fasten the center screw (45) with the hex wrench tool 4mm.

Machine Assembly

Fasten the other four screws (44) holding the pad backing with the hex wrench tool 2,5mm.

Machine Assembly

Apply the pad (46) and fasten the four screws (42) holding it to the machine with the hex wrench tool 2,5mm.

Change of air inlet

Change of air inlet

Remove the vacum hose from the inlet bushing (51).

Change of air inlet

Remove the inlet bushing (51) from the machine.

Change of air inlet

51. INLET BUSHING 52. VALVE SPRING 53. VALVE 54. SEAT

Change the parts that are worn out and apply the parts back together in reverse order.

Change of speed valve


Remove the pin (29) holding the lever (28).


Remove the retaining ring (39) holding the speed control (38).


28.

29.

39. 31.

35.

38.

28. LEVER

29. PIN

31. SLEEVE

35. VALVE STEAM ASSEMBLY

38. SPEED CONTROL

39. RETAINING RING


Apply the slleve (31) into the housing.


Apply the speed control (38) into the housing. Lock the speed control with the retaining ring (39).


Apply the Valve steam assembly (35) into the housing.


Apply the seat (54) into the housing.


Valve (53) into the housing.


Apply the valve spring (52) into the housing.


Attach the inlet bushing (51) to the housing.


Attach the vacum hose to the inlet bushing (51).


Attach the lever (28) to the machine. Fasten the lever with the pin (29).

Change of muffler

Change of muffler

Remove the muffler assembly (50) from the housing.

Change of muffler

Change the parts that are worn out and apply the parts back together in reverse order.

orbital sanding machine repair guide - · pdf fileorbital sander spare part kits 8 motor...

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