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1
.X +/-
NA
RAG
0.5°
10/30/08
PWH
STD TOL
0.05
0.1
XPD0062
P/N
TITLE
DRWN BY / DATE
DUCTION IN PART O R AS A WHOLE WITHOUT THE WRITTEN
.XX +/-
MATERIAL
NA
TOOLS INC.
X'POLE PRECISION
SEE BOM
PROPERTY OF X'POLE PRECISION TOOLS INC. ANY REPRO-
ANGLES +/-
PROPRIETARY AND CONFIDENTIAL
PERMISSION OF X 'POLE PRECISION TOOLS INC. IS PRO HIBITED.
XX/XX +/-
CKD BY / DATE ENG APP / DATE
10/29/08
THE INFORMAT ION CONTAINED IN THIS DRAW ING IS THE SOLE
.XXX +/-
MIRKA 125 & 150 mm (5 & 6 in.) 12,000
RPM TwoHAND™ ROS
1DLEIHS TSUD GNIRAEB ELDNIPS DNAHowT0452APX07
A
DESCRIPTION / DATER
REVISION RECORD
-ITEM 49: XPC0146 AND XPC0147 WERE
B
RAG 10/29/08 PWH 10/30/08
-RELEASE FOR PRODUCTION
-ITEMS 69 AND 70 WERE NOT ON
C
RAG 09/03/09 PWH 09/03/09
NOT REMOVED
1DLEIHS TSUD GNIRAEB TNORF1452APX96
1GAB MUUCAV AKRIM ROF TRESNI4640APX86
RAG 11/04/10 PWH 11/05/10
-ITEMS 68 WAS XPC0109
D
RAG 10/12/10 PWH 10/13/10
YTQNOITPIRCSEDN/PTI
1GNIR GNINIATER LANRETXE0400APX1
1SDLEIHS 2 - GNIRAEB 8 X 62 X 011200APX2
1ETALPDNE RAER7100BPX3
1YLBMESSA REDNILYC mm 0.63 X mm 0
.05 Ø1440APX4
1GNIR-O mm 0.2 x mm 52400APX5
1ROTOR DENIHCAM ROTOM mm 63 x mm 0.05 Ø8110BPX6
5ROTOM mm 0.63 x mm 0.05 Ø ROF ENAV5440APX7
2YEK FFURDOOW mm 31 x mm 31400APX8
1ETALPDNE TNORF6100BPX9
1SDLEIHS 2 - GNIRAEB 8 X 82 X 219100APX01
1GNIR-O mm 1.3 x mm 4.935400APX11
1GNIR KCOL1000APX21
13 XPB0207TwoHAND 125 x 5.0 mm (5 x 3/16 in.) ORBIT ROS AirSHIELD™ SHAFT
BALANCER1
13 XPB0189TwoHAND 125 x 10 mm (5 x 3/8 in.) ORBIT ROS AirSHIELD™ SHAFT
BALANCER1
13 XPB0187TwoHAND 150 x 5.0 mm (6 x 3/16 in.) ORBIT ROS AirSHIELD™ SHAFT
BALANCER1
13 XPB0188TwoHAND 150 X 10 mm (6 x 3/8 in.) ORBIT ROS AirSHIELD™ SHAFT
BALANCER1
1RETLIF2210APX41
1EVLAV KCEHC LLIBKCUD1210APX51
1RENIATER EVLAV0210APX61
1GNIR GNINIATER ).ni 23/51( mm 9.110900APX71
18 XPA075112 x 32 x 15.9 DOUBLE ROW ANGULAR CONTACT BEARING - 1 SEAL 1
1KHT 2.0 x DO 0.22 x DI 1.21 RECAPS7671APX91
1REHSAW ELLIVELLEB4201APX02
1ELDNIPS8020BPX12
1GNIR GNINIATER5201APX22
1HCNERW DAP mm 422200APX32
24 NA 1 Pad Supplied With Each Tool (Type Determined By Model) 1
2GULP DEDAERHT 8M1171APX52
26 XPB039336.0 mm RH PMS 123C YELLOW MIRKA HOUSING W/SIDE HANDLE HOLE 1
1)senihcaM MPR 000,01 rof( TRESNI RELFFUM2300APX72
1LAES GNISUOH POT8121APX82
1LAES GNISUOH ROTOM mm 0.630920BPX92
30 XPA2068 MIRKA 12,000 RPM 5.0 mm (3/16 in.) ORBIT THROTTLE LEVER - TwoHAND 1
30 XPA2069 MIRKA 12,000 RPM 10.0 mm (3/8 in.) ORBIT THROTTLE LEVER - TwoHAND 1
1KCALB - REGNAH0240BPX13
2GNIR RECAPS5681APX23
33 XPB035636.0 mm DIE-CAST MACHINE MOTOR HOUSING W/SIDE HANDLE
MOUNTING STUDS1
1NIP GNIRPS REDNILYC4000APX43
1YLBMESSA METS EVLAV
5560APX53
1EVEELS EVLAV5100APX63
1TAES EVLAV9000APX73
1EVLAV7000APX83
1GNIRPS EVLAV4100APX93
1YLBMESSA LAES ENILRIA0370APX04
1TEKSAG TSUAHXE0050APX14
1ELZZON TSUAHXE VGS ROTOM mm 0.631810BPX24
1ELZZON TSUAHXE VC/VN2810BPX34
3WERCS PAC DAEH NOTTUB TEKCOS XEH 8 X 4M4660APX44
1)senihcaM VC & VN( GNIBUT TSUAHXE7150APX54
1PMALC GNIBUT6150APX64
1GNIBUT TELNI1150APX74
1DUORHS VN/REFFUB .ni 6/5 ™DNAHowT3510CPX84
1DUORH
S PL/ELOH-ITLUM .ni 5 ™DNAHowT5410CPX94
1DUORHS PL/ELOH-ITLUM .ni 6 ™DNAHowT8310CPX94
1AKRIM - ELDNAH EDIS1891APX05
51 XPB039436.0 mm LH PMS 123 YELLOW HOUSING W/SIDE HANDLE HOLE 1
5KCALB mm 51 X 0.4M XROT DAEH NOTTUB ,WERCS8931APX25
7KCALB mm 03 X 0.4M XROT DAEH NOTTUB ,WERCS0341APX35
1GNIR-O mm 5.1 x mm 93400APX45
1LORTNOC DEEPS ™DNAHowT3810BPX55
1GNIR GNINIATER LANRETNI9300APX65
1GNIR EVITPAC TELNI0150APX75
1GNIR-O mm 87.1 x mm 6.790
50APX85
1)senihcaM VC & VN( GNIR-O8260APX95
2)senihcaM VC & VN( RELFFUM6770APX06
61 XPA0731 INLET/EXHAUST END CAP ASSEMBLY FOR NV MACHINES 1
62 XPA1294 INLET/EXHAUST END CAP ASSEMBLY FOR SGV AND CV MACHINES 1
1YLBMESSA GNIHSUB TELNI TPN 81-4/13100APX36
64 XPA0392Ø 1 in. VAC HOSE TO Ø 1 in./28 mm x 1 1/2 in. ADAPTOR COUPLING AND
AIRLINE ASSEM1
1™DNAHowT-LAES ESOH )mm 82( .ni 13260APX56
66 XPA0412 Ø 1 in. VAC HOSE TO DOUBLE BAG FITTING AND AIRLINE ASSY 1
1GAB MUUCAV0110CPX76
ITEM NO. TORQUE SETTINGS N-m (in.-lbs)
12 6.2 - 7.3 (55 - 65)
43 2.4 - 3.4 (21 - 30)
52 3.0 - 3.4 (27 - 30)
53 3.3 - 3.7 (29 - 33)
63 6.8 - 8.1 (60 - 72)
66
46
68
65
TO VACUUM
SYSTEM FOR
CENTRAL
VACUUM
69
1
2
3
4
5
6
7
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
31
32 33
34
35
64
53
60
8
52
27 28
29
30
41
42
43
44
67
45
47
48
36
37
49
25
50
51
38
39
54 55 56
40
52
57 58
59
61
62
63
53
52
70
Parts Page
Part numbers for ordering Spare Part Assemblies, labeled A through H, are located on page 3.
Original Instructions
D
F
H
C
G
A
E
A
D
B
D
2
Parts List
Item No. Part No. Description Qty.
1 MPA0040 RETAINING RING 1
2 MPA0021 BEARING 1
3 MPB0017 REAR ENDPLATE 1
4 MPA0441 CYLINDER ASSEMBLY 1
5 MPA0042 O-RING 1
6 MPB0118 ROTOR 1
7 MPA0445 VANE 5
8 MPA0041 KEY 2
9 MPB0016 FRONT ENDPLATE 1
10 MPA0019 BEARING 1
11 MPA0045 O-RING 1
12 MPA0001 LOCK RING 1
13 MPB0189 125 x 10 mm (5 x 3/8 in.) ORBIT SHAFT BALANCER 1
MPB0188 150 X 10 mm (6 x 3/8 in.) ORBIT SHAFT BALANCER 1
14 MPA0122 FILTER 1
15 MPA0121 DUCKBILL CHECK VALVE 1
16 MPA0120 VALVE RETAINER 1
17 MPA0090 RETAINING RING 1
18 MPA0751 DOUBLE ROW BEARING 1
19 MPA1767 SPACER 1
20 MPA1024 BELLEVILLE WASHER 1
21 MPB0208 SPINDLE 1
22 MPA1025 RETAINING RING 1
23 MPA0022 PAD WRENCH 1
24 NA 1 Pad Supplied With Each Tool (Type Determined By Model) 1
25 MPA1711 THREADED PLUG 2
26 MPB0393 RH HOUSING 1
27 MPA0032 MUFFLER INSERT 1
28 MPA1218 TOP HOUSING SEAL 1
29 MPB0290 MOTOR HOUSING SEAL 1
30 MPA2069 10.0 mm (3/8 in.) ORBIT THROTTLE LEVER 1
31 MPB0420 HANGER - BLACK 1
32 MPA1865 SPACER RING 2
33 MPB0356 MOTOR HOUSING 1
34 MPA0004 CYLINDER SPRING PIN 1
35 MPA0655 VALVE STEM ASSEMBLY 1
36 MPA0015 VALVE SLEEVE 1
37 MPA0009 VALVE SEAT 1
38 MPA0007 VALVE 1
39 MPA0014 VALVE SPRING 1
40 MPA0730 AIRLINE SEAL ASSEMBLY 1
41 MPA0500 EXHAUST GASKET 1
42 MPB0181 SGV EXHAUST NOZZLE (SGV Machines) 1
43 MPB0182 NV/CV EXHAUST NOZZLE (NV & CV Machines) 1
44 MPA0664 SCREW 3
45 MPA0517 EXHAUST TUBING (NV & CV Machines) 1
46 MPA0516 TUBING CLAMP (NV & CV Machines) 1
47 MPA0511 INLET TUBING 1
48 MPC0153 125/150 mm (5/6 in.) BUFFER/NV SHROUD 1
49 MPC0145 125 mm (5 in.) MULTI-HOLE/LP SHROUD 1
MPC0138 150 mm (6 in.) MULTI-HOLE/LP SHROUD 1
50 MPA1981 SIDE HANDLE - MIRKA 1
51 MPB0394 LH HOUSING 1
52 MPA1398 SCREW 5
53 MPA1430 SCREW 7
54 MPA0043 O-RING 1
55 MPB0183 SPEED VALVE 1
56 MPA0039 RETAINING RING 1
57 MPA0510 INLET CAPTIVE RING 1
58 MPA0509 O-RING 1
59 MPA0628 O-RING (NV & CV Machines) 1
60 MPA0776 MUFFLER (NV & CV Machines) 2
61 MPA0731 INLET/EXHAUST END CAP ASSEMBLY (NV Machines) 1
62 MPA1294 INLET/EXHAUST END CAP ASSEMBLY (SGV & CV Machines) 1
63 MPA0013 INLET BUSHING ASSEMBLY 1
64 MPA0392 Ø 28 mm (1 in.) VACUUM HOSE TO Ø 28 mm (1 in.) x 38 mm (1 1/2 in.) ADAPTOR COUPLING & AIRLINE
ASSEMBLY (CV Machines)
1
65 MPA0623 Ø 28 mm (1 in.) HOSE SEAL (SGV Machines) 1
66 MPA0412 Ø 28 mm (1 in.) VACUUM HOSE TO DOUBLE BAG FITTING AND AIRLINE ASSEMBLY (SGV Machines) 1
67 MPA0658 VACUUM BAG (SGV Machines) 1
68 MPA0465 10 PACK OF VACUUM BAG INSERTS (SGV Machines) 1
69 MPA2541 FRONT BEARING DUST SHIELD 1
70 MPA2540 TwoHAND SPINDLE BEARING DUST SHIELD 1
3
Sander Spare Parts Kits
C MPA2216 Air Inlet Kit
Code: 8994024011
A MPA2214 Mufer Kit
Code: 8994026011
B MPA2186 Spindle Bearing Kit
Code: 8994021811
F MPA2220; Rotor Vanes and Key Kit
Code: 8994020611
REVISION RECORD
R DESCRIPTION / DATE
A-RELEASE FOR PRODUCTION
RAG 01/30/08 PWH 02/13/08
YTQNOITPIRCSEDN/PTI
2RELFFUM6770APX1
1)senihcaM MPR 000,01 rof( TRESNI RELFFUM2300APX2
1TIK RELFFUM MPR 000,21 EGATNAVriA ROF LEBAL3881APX3
1GAB EPAN4
RAG
01/30/08
PWH
02/13/08
REVISED 12/19
- 2 HAND
XPA1877
TOOLS INC.
NA
0.05
P/N
TITLE
DRWN BY / DATE
MATERIAL
.XX +/-
DUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN
PROPRIETARY AND CONFIDENTIAL
NA
0.5°
X'POLE PRECISION
/05
PROPERTY OF X'POLE PRECISION TOOLS INC. ANY REPRO-
ANGLES +/-
0.1
PERMISSION OF X'POLE PRECISION TOOLS INC. IS PROHIBITED.
CKD BY / DATE ENG APP / DATE
STD TOL
.X +/- XX/XX +/-
THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE
.XXX +/-
AirVANTAGE™ 12,000 RPM MUFFLER KIT
SEE BOM
E MPA2218 Speed Valve Kit
Code: 8994025511
G MPA2222 Vacuum Endcap Kit
Code: 8994026711
H MPA0993 Lock Ring and O-ring Kit
Code: 8993007911
D MPA0799 Endplate Bearing Kit
Code: 8993019811
RAG 01/31/08 PWH 02/13/08
-RELEASE FOR PRODUCTION
A
DESCRIPTION / DATER
REVISION RECORD
YTQNOITPIRCSEDN/PTI
2YEK FFURDOOW mm 31 x mm 31400APX1
1ROTOR DENIHCAM ROTOM mm 63 x mm 0.05 Ø8110BPX2
5ROTOM mm 0.63 x mm 0.05 Ø ROF ENAV5440APX3
4 XPA1887 LABEL FOR AirVANTAGE ROTOR, VANES AND KEYS KIT - 36.0 MM MOTOR 1
1GAB EPAN5
01/31/08
PWH
02/13/08
REVISED 12/19
KEYS KIT - 36.0 MM MOTOR
XPA1881
P/N
RAG
NA
NA
TITLE
DRWN BY / DATE
MATERIAL
PROPRIETARY AND CONFIDENTIAL
DUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN
.XX +/-
PERMISSION OF X'POLE PRECISION TOOLS INC. IS PROHIBITED.
0.5°
X'POLE PRECISION
/05
PROPERTY OF X'POLE PRECISION TOOLS INC. ANY REPRO-
ANGLES +/-
0.1
0.05
CKD BY / DATE ENG APP / DATE
STD TOL
.X +/- XX/XX +/-
TOOLS INC.
THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE
.XXX +/-
AirVANTAGE™ ROTOR, VANES AND
SEE BOM
4
MIRKA 12,000 RPM Two-handed
125 mm (5 in.) & 150 mm (6 in.)
RANDOM ORBITAL SANDERS
The warranty terms are as follows:
- 12 months on KWH MIRKA air tools.
- 3 months on tool parts repaired by KWH MIRKA.
The warranty period commences at the date of purchase. The warranty only covers imputable material and manu-
facturing defects.
Parts replacement or repair during the warranty period is free of charge if carried out by an ofcial KWH MIRKA
service center.
Freight costs are always to be paid by the purchaser.
The warranty does not include:
Normal wear and tear i.e.
- Bearings, backing pad, shroud, rotor, vanes, swivel tting, mufer
Overloading or improper use i.e.
- Dropping the tool in water
- Damage caused by misuse
- Damage caused by anything other than defects in material and workmanship
- Dropping or other excessive impact
Normal maintenance and service that can be carried out by the operator:
- Changing of the packing pad
- Changing of the spindle bearing
- Changing of the exhaust tting
- Changing of the shroud
Please Note! All other service operations must be carried out by an authorized Mirka service center.
The warranty only covers the local repair, not the tool replacement.
Compensation for downtime and loss of production are explicitly not included in the warranty.
Repair claims under warranty will only be honored if the tool is returned in its original assembled state. Any disas-
sembly will void the warranty.
The warranty can only be submitted to the dealers where the tool was purchased.
Warranty
5
Closed Loop Pipe System
Sloped in the direction of air flow
Drain Leg
Ball Valve
To Tool Station
Filter
Drain Valve
Regulator
Lubricator
Ball
Valve
Ball Valve Air Flow
Air Dryer
Air Compressor
and Tank
Air Hose
To Coupler
at or near Tool
Please Read and Comply with Putting the Tool into Service
Operating Instructions
Work Stations
Proper Use of Tool
1) General Industry Safety & Health Regulations, Part 1910,
OSHA 2206, available from: Superintendent of Documents;
Government Printing Ofce; Washington DC 20402
2) Safety Code for Portable Air Tools, ANSI B186.1 available from:
American National Standards Institute, Inc.; 1430 Broadway;
New York, New York 10018
3) State and Local Regulations.
This sander is designed for sanding all types of materials i.e.
metals, wood, stone, plastics, etc. using abrasive designed for this
purpose. Do not use this sander for any other purpose than that
specied without consulting the manufacturer or the manufac-
turer’s authorized supplier. Do not use back-up pads that have a
working speed less than 12,000 RPM free speed.
The tool is intended to be operated as a hand held tool. It is
always recommended that the tool be used when standing on a
solid oor. It can be in any position but before any such use, the
operator must be in a secure position having a rm grip and foot-
ing and be aware that the sander can develop a torque reaction.
See the section “Operating Instructions”.
Use a clean lubricated air supply that will give a measured air
pressure at the tool of 6.2 bar (90 psig) bar when the tool is run-
ning with the lever fully depressed. It is recommended to use an
approved 10 mm (3/8 in.) x 8 m (25 ft) maximum length airline. It
is recommended that the tool be connected to the air supply as
shown in Figure 1.
Do not connect the tool to the airline system without incorporating
an easy to reach and operate air shut off valve. The air supply
should be lubricated. It is strongly recommended that an air lter,
regulator and lubricator (FRL) be used as shown in Figure 1 as
this will supply clean, lubricated air at the correct pressure to
the tool. Details of such equipment can be obtained from your
supplier. If such equipment is not used then the tool should be
manually lubricated
To manually lubricate the tool, disconnect the airline and put 2 to
3 drops of suitable pneumatic motor lubricating oil such as Fuji
Kosan FK-20, Mobil ALMO 525 or Shell TORCULA® 32 into the
hose end (inlet) of the machine. Reconnect tool to the air supply
and run tool slowly for a few seconds to allow air to circulate the
oil. If the tool is used frequently, lubricate it on a daily basis or
lubricate it if the tool starts to slow or lose power.
It is recommended that the air pressure at the tool is 6.2 bar (90
psig) while the tool is running. The tool can run at lower pressures
but never higher than 6.2 bar (90 psig)
1) Read all instructions before using this tool. All operators must be fully trained in its
use and aware of these safety rules. All service and repair must be carried out by
trained personnel.
2) Make sure the tool is disconnected from the air supply. Select a suitable abrasive
and secure it to the back-up pad. Be careful and center the abrasive on the back-
up pad.
3) Always wear required safety equipment when using this tool.
4) When sanding always place the tool on the work then start
the tool. Always remove the tool from the work before stop-
ping. This will prevent gouging of the work due to excess
speed of the abrasive.
5) Always remove the air supply to the sander before tting,
adjusting or removing the abrasive or back-up pad.
6) Always adopt a rm footing and/or position and be aware
of torque reaction developed by the sander.
7) Use only correct spare parts.
8) Always ensure that the material to be sanded is rmly xed
to prevent its movement.
9) Check hose and ttings regularly for wear. Do not carry the
tool by its hose; always be careful to prevent the tool from
being started when carrying the tool with the air supply
connected.
10) Dust can be highly combustible. Vacuum dust collection
bag should be cleaned or replaced daily or when bag
reaches half full or 2.3 kg (5 lbs.). Cleaning or replacing of
bag also assures optimum performance.
11) Do not exceed maximum recommended air pressure. Use
safety equipment as recommended.
12) The tool is not electrically insulated. Do not use where
there is a possibility of coming into contact with live
electricity, gas pipes, water pipes, etc. Check the area of
operation before operation.
13) Take care to avoid entanglement with the moving parts of the tool with clothing,
ties, hair, cleaning rags, etc. If entangled, it will cause the body to be pulled
towards the work and moving parts of the machine and can be very dangerous.
14) Keep hands clear of the spinning pad during use.
15) If the tool appears to malfunction, remove from use immediately and arrange for
service and repair.
16) Do not allow the tool to free speed without taking precautions to protect any per-
sons or objects from the loss of the abrasive or pad.
6
Orbit Vacuum
Type
Pad
Size
mm
(inch)
Model Number
Product Net
Weight kg
(pounds)
Height
mm
(inch)
Length
mm
(inch)
*Noise
Level
dBA
Power
watts
(HP)
Air Consumption
LPM (scfm)
*Vibration
Level
m/s2
*Uncertainty
K
m/s2
10.0 mm
(3/8 in.)
Non-
Vacuum
125 (5) MR-510TH 1.22 (2.70) 112.6
(4.43)
276.4
(10.88) 85 343
(.46) 594 (21) 3.4 1.7
150 (6) MR-610TH 1.27 (2.81) 112.6
(4.43)
287.7
(11.33) 87 343
(.46) 594 (21) 3.3 1.7
Central
Vacuum
125 (5) MR-510THCV 1.25 (2.76) 112.6
(4.43)
317.0
(12.48) 83 343
(.46) 594 (21) 3.5 1.8
150 (6) MR-610THCV 1.32 (2.90) 112.6
(4.43)
328.3
(12.93) 81 343
(.46) 594 (21) 3.4 1.7
Self-Gen.
Vacuum
125 (5) MR-510THSGV 1.25 (2.74) 112.6
(4.43)
317.0
(12.48) 85 343
(.46) 594 (21) 3.1 1.6
150 (6) MR-610THSGV 1.31 (2.88) 112.6
(4.43)
328.3
(12.93) 90 343
(.46) 594 (21) 3.3 1.7
The noise test is carried out in accordance with EN ISO 15744:2008 - Hand-held non-electric power tools -- Noise measurement code
-- Engineering method (grade 2).
The vibration test is carried out in accordance with EN 28662-1 Hand-held portable power tools – Measurement of vibration at the
handle. Part 1: General and EN 8662-8. 1997 Hand-held portable power tools – Measurement of vibration at the handle. Part 8:
Polishers and rotary. orbital and random orbital sanders.
Specications subject to change without prior notice.
*The values stated in the table are from laboratory testing in conformity with stated codes and standards and are not sufcient for risk
evaluation. Values measured in a particular work place may be different than the declared values. The actual exposure values and
amount of risk or harm experienced to an individual is unique to each situation and depends upon the surrounding environment, the way
in which the individual works, the particular material being worked, work station design as well as upon the exposure time and the physi-
cal condition of the user. KWH Mirka, Ltd. cannot be held responsible for the consequences of using declared values instead of actual
exposure values for any individual risk assessment.
Further occupational health and safety information can be obtained from the following websites:
http://europe.osha.eu.int (Europe)
http://www.osha.gov (USA)
Product Conguration/Specications: 12,000 RPM Random Orbital Sander
7
Symptom Possible Cause Solution
Low Power and/or Low Free
Speed
Insufcient Air Pressure Check air line pressure at the Inlet of the Sander
while the tool is running at free speed. It must be
6.2 Bar (90 psig/620 kPa).
Clogged Mufer(s) See the “Housing Disassembly” section for Mufer
removal. The Item 60 Mufer can be back ushed
with a clean, suitable cleaning solution until all con-
taminates and obstructions have been removed.
If the Mufer can not be properly cleaned then
replace it. (See the “Housing Assembly” Section).
Plugged Inlet Screen Clean the Inlet Screen with a clean, suitable
cleaning solution. If Screen does not come clean
replace it.
One or more Worn or Broken Vanes Install a complete set of new Vanes (all vanes must
be replaced for proper operation). Coat all vanes
with quality pneumatic tool oil. See “Motor Disas-
sembly” and “Motor Assembly”.
Internal air leakage in the Motor Housing
indicated by higher than normal air con-
sumption and lower than normal speed.
Check for proper Motor alignment and Lock Ring
engagement. Check for damaged O-Ring in Lock
Ring groove. Remove Motor Assembly and Re-In-
stall the Motor Assembly. See “Motor Disassembly”
and “Motor Assembly”.
Motor Parts Worn Overhaul Motor. Contact authorized Mirka Service
Center.
Worn or broken Spindle Bearings Replace the worn or broken Bearings. See “Shaft
Balancer and Spindle Disassembly” and “Spindle
Bearings, AirSHIELD™ and Shaft Balancer As-
sembly”.
Air leakage through the Speed
Control and/or Valve Stem.
Dirty, broken or bent Valve Spring, Valve
or Valve Seat.
Disassemble, inspect and replace wore or dam-
aged parts. See Steps 2 and 3 in “Housing Disas-
sembly” and Steps 2 and 3 in “Housing Assembly”.
Vibration/Rough Operation
Incorrect Pad Only use Pad Sizes and Weights designed for the
machine.
Addition of interface pad or other material Only use abrasive and/or interface designed for the
machine. Do not attach anything to the Sanders
Pad face that was not specically designed to be
used with the Pad and Sander.
Improper lubrication or buildup of foreign
debris.
Disassemble the Sander and clean in a suitable
cleaning solution. Assemble the Sander. (See
“Service Manual”)
Worn or broken Rear or Front Motor
Bearing(s)
Replace the worn or broken Bearings. See “Motor
Disassembly” and “Motor Assembly”.
For vacuum machines it is possible to
have too much vacuum while sanding on a
at surface causing the pad to stick to the
sanding surface.
For SGV machines add extra washer(s) to the pad
spindle to increase the gap between the pad and
shroud. For CV machines reduce vacuum through
the vacuum system and/or add extra washer(s)
to the pad.
Troubleshooting Guiide
Note: All Sections referred to under “Solution” are located at the end of the manual in “Service Instructions”
8
MIRKA 12,000 RPM
125 mm (5 in.) & 150 mm (6 in.)
RANDOM ORBITAL SANDERS
SERVICE INSTRUCTIONS
NOTICE: To receive any expressed or implied warranty, tool must be repaired by an authorized Mirka Service Center. The following
general service instructions provided are for use after completion of the warranty period.
DISASSEMBLY INSTRUCTIONS
Motor Disassembly:
To prevent damage to the motor assembly the following sequence
must be followed:
1. Remove the (24) Pad with the (23) 24 mm Pad Wrench.
2. Unscrew the (12) Lock Ring with the (MPA0025) T-6 Motor
Lock Ring Wrench/Spindle Puller Tool. The motor assembly
and Lock Ring can now be lifted out of the (33) Motor Hous-
ing.
3. Remove the (1) Retaining Ring and the (5) O-Ring from the
(4) Cylinder.
4. Remove the (3) Rear Endplate. This requires supporting the
Rear Endplate using a (MPA0416) Bearing Separator and
lightly pressing the shaft through the (2) Bearing and the
Rear Endplate. Remove the (4) Cylinder and the ve (7)
Vanes and (6) Rotor from the shaft of the (13) Shaft Balancer.
Remove the (8) Keys then press off the (9) Front Endplate
(with (10) Bearing), (11) O-Ring and the (12) Lock Ring. It
may be necessary to remove the Bearing with a Bearing
Separator if it came out of the Front Endplate and stuck to the
shaft of the Shaft Balancer.
5. Remove and discard (69) Dust Shield from the (13) Shaft
Balancer.
6. Remove the bearing(s) from the endplates by using the
(MPA0036) T-8 Bearing Removal Tool to press out the bear-
ings.
Shaft Balancer and Spindle Disassembly:
1. With a thin screwdriver pick out the slotted end of the (22)
Retaining Ring and peel out.
2. Screw the threaded end of the (MPA0025) T-6 Motor Lock
Ring Wrench/Spindle Puller Tool into the (21) Spindle until
hand tight. Apply a gentle heat from a propane torch or hot
air gun to the large end of the (13) Shaft Balancer until it is
about 100° C (212° F) to soften the adhesive. Do not over
heat. Remove the spindle assembly by using the slider to
pull the spindle assembly outward. Allow the parts to cool
until they are safe to handle. Do not “bang out” the spindle
assembly using the T-6 Motor Lock Ring Wrench/Spindle
Puller Tool because this could damage the Bearing.
3. The AirSHIELD™ components are held in place by the light
press t of the (16) Retainer. These components can be
damaged during removal and may need to be replaced if
removed. To remove the Retainer, use an o-ring pick or a #8
sheet metal screw to grip and pull out the Retainer. Remove
the (15) Valve and (14) Filter from the bore in the (13) Shaft
Balancer. If the Retainer and Valve were not damaged, they
can be reused. However, the Filter should be replaced on
re-assembly.
4. Remove the (17) Retaining Ring from the (21) Spindle.
5. Remove the (18) bearing from the (21) Spindle. Remove
the (19) Spacer, (70) Dust Shield and (20) Washer from the
Spindle. Discard Dust Shield.
Housing Disassembly:
1. Unscrew the threaded (25) Plug(s) and/or the (50) Handle (if
used) from the (33) Motor Housing.
2. Remove the (31) Hanger and (32) Spacer Ring. (if used)
3. Remove the (56) Retaining Ring. The (55) Speed Control
(with (54) O-Ring) will now pull straight out from the (33) Mo-
tor Housing. Use an o-ring pick to remove the O-Ring from
the Speed Control.
4. Use a T-20 Torx driver to unscrew all (52 and 53) Screws.
5. Remove the (26 and 51) Housings.
6. Remove the (27) Mufer and (28 and 29) Seals from the (26)
Housing.
6a. For Non-Vacuum (NV) machines: Remove the (61) End Cap.
6b. For Central Vacuum (CV) and Self Generated Vacuum (SGV)
machines: Remove the (62) End Cap. Remove the (65)
Hose Seal from the CV/SGV End Cap.
7. Unscrew the (63) Inlet Bushing from the (61 and 62) End
Cap. Remove the (60) Mufers, (57) Captive Ring, (58) O-
Ring, and (59) O-Ring from the End Cap.
8a. For NV and CV machines: Remove the exhaust (45) Tubing,
(46) Tubing Clamp, and inlet (47) Tubing from the motor
housing assembly. Separate the exhaust Tubing, Tubing
Clamp, and inlet Tubing from each other.
8b. For SGV machines: Remove the inlet (47) Tubing from the
motor housing assembly.
9. Unscrew the three (44) Screws from the motor housing as-
sembly.
10a. For NV and CV machines: Remove the NV/CV (43) Exhaust
Nozzle and the (41) Gasket from the motor housing assem-
bly.
10b. For SGV machines: Remove the SGV (42) Exhaust Nozzle
and the (41) Gasket from the motor housing assembly.
11. Press out the (34) Spring Pin from the (33) Motor Housing
and remove the (30) Throttle Lever.
12. Remove the (40) Seal Assembly. This component can be-
come damaged during removal and will need to be replaced if
damaged.
13. Remove the (39) Spring, (38) Valve, (37) Valve Seat, and the
(35) Valve Stem from the (33) Motor Housing. Use an o-ring
pick to remove the o-ring from the Valve Stem.
14. Remove the (36) Sleeve from the (33) Motor Housing.
15. Remove the (48 or 49) Shroud from the (33) Motor Housing.
ASSEMBLY INSTRUCTIONS
NOTE: All assembly must be done with clean dry parts and all
bearings are to be pressed in place by the correct tools and
procedures as outlined by the bearing manufacturers.
Housing Assembly:
1. Press the (36) Sleeve ush to the top of the (33) Motor Hous-
ing.
2. Lightly grease the o-ring and place it in the groove of the (35)
Valve Stem. Install the Valve Stem into the (36) Sleeve.
3. Install the (37) Valve Seat, the (38) Valve and the (39) Spring.
Press the (40) Seal Assembly into the (33) Motor Housing.
4. Install the (30) Throttle Lever into the (33) Motor Housing with
the (34) Spring Pin.
5. Install the (48 or 49) Shroud onto the (33) Motor Housing.
6a. For NV and CV machines: Install the NV/CV (43) Exhaust
Nozzle and the (41) Gasket using the three (44) Screws.
Torque setting to be 2.4-3.4 N-m (21-30 in-lbs). Insert the
exhaust (45) Tubing and the inlet (47) Tubing into the (46)
Tubing Clamp. Then insert the exhaust Tubing into the
Exhaust Nozzle and insert the inlet Tubing into the (40) Seal
Assembly.
6b. For SGV machines: Install the SGV (42) Exhaust Nozzle and
(41) Gasket using the three (44) Screws. Torque setting to
be 2.4-3.4 N-m (21-30 in-lbs). Insert the inlet (47) Tubing into
(40) Seal Assembly.
7. Install the two (60) Mufers, (58) O-Ring, (57) Captive Ring,
(59) O-Ring into the (61 or 62) End Cap. Lightly grease the
o-rings before installation.
8. Coat the threads of the (63) Bushing Assembly with 1 or 2
drops of Loctite™ 222 or equivalent non-permanent pipe
9
thread sealant. Screw the Bushing Assembly into the inlet
port on the (61 or 62) End Cap until hand tight. Torque set-
ting to be 6.8-8.1 N-m (60-72 in-lbs).
9a. For CV and SGV machines: Insert the Inlet (47) Tubing into
the (62) End Cap. Install the Inlet Tubing into the (40) Seal
Assembly.
9b. For NV machines: Insert the inlet (47) Tubing into the (61)
End Cap.
10. Install the (27) Mufer and (28 and 29) Seals into the (26)
Housing.
11. Install the internal components into the (26) Housing. Then
install the (51) Housing.
12. Install the (52 and 53) Screws. Torque setting to be 3.0-3.4
N-m (27- 30 in-lbs) for (52) Screw. Torque setting to be 3.3-
3.7 N-m (29- 33 in-lbs) for (53) Screw.
13. Lightly grease the (54) O-Ring and place it in the groove on
the (55) Speed Control. Insert the Speed Control into the
(33) Motor Housing in the full on position. Install the (56)
Retaining Ring. Caution: Make sure the Retaining Ring is
completely snapped into groove in the Motor Housing.
14. Install the (32) Spacer Ring into the (31) Hanger Secure the
hanger by screwing in the (25) Plugs and/or install the (50)
Side Handle.
Spindle, AirSHIELD™ and Shaft Balancer Assembly:
1. Place the (MPA0194) T-1A Spindle Bearing Pressing Tool
Base onto a at, clean surface of a small hand press or
equivalent with the pocket facing upward. Place the (21)
Spindle into the spindle pocket with the shaft facing upward.
2. Place the (20) Washer on the (21) Spindle shaft with the
curve of the Washer facing up so that the outside diameter of
the Washer will contact the outer diameter of the (18) Bear-
ing. Place the (70) Dust Shield onto the Spindle shaft. Place
the (19) Spacer onto the shoulder of the Spindle. Note: Be
sure that the Dust Shield is past the shoulder where Spacer
rests. Place the Bearing on the Spindle with the seal side
toward the Washer. Note: Make sure that both the inner
and outer races of the Bearing are supported by the Bearing
Press Tool when pressing them into place. Press the Bearing
to the Spacer using the (MPA0195) T-1B Spindle Bearing
Pressing Tool Top.
3. Take the (14) Filter and center it on the small bore that the
original Filter was in before removal. With a small diameter
screwdriver or at-ended rod, press the Filter into the bore
until it is at in the bottom of the bore. Place the (15) Valve
into the bore so it is oriented correctly, then press the (16)
Retainer into the bore until it is ush with the surface of the
(13) Shaft Balancer.
4. Apply a pin head size drop of #271 Loctite® or equivalent to
the outside diameter of the (18) Bearing of the Spindle As-
sembly. Spread the drop of bearing locker around the Bear-
ings until it is distributed evenly. Caution: Only a very small
amount of bearing locker is needed to prevent rotation of the
bearing OD. Any excess will make future removal difcult.
Place the Spindle Assembly into the bore of the (13) Shaft
Balancer and secure with the (22) Retaining Ring. Caution:
Make sure that the Retaining Ring is completely snapped into
the groove in the Balancer shaft. Allow the adhesive to cure.
Motor Assembly:
1. Place the (69) Dust Shield onto the shaft of the (13) Shaft
Balancer.
2. Lightly grease the (11) O-Ring with a light mineral grease and
place it in the groove of the (12) Lock Ring, then place it on
the (13) Shaft Balancer with the O-Ring facing towards the
keyway.
3. Use the larger end of the (MPA0494) T-13 Bearing Press
Sleeve to press the front (10) Bearing (with 2 Shields) onto
the shaft of the (13) Shaft Balancer.
4. Slide the (9) Front Endplate with the bearing pocket facing
down onto the motor shaft. Gently press the Front Endplate
onto the (10) Bearing using the larger end of the (MPA0494)
T-13 Bearing Press Sleeve until the front (10) Bearing is
seated in the bearing pocket of the Front Endplate. Caution:
Only press just enough to seat the Bearing into the pocket.
Over-pressing can damage the Bearing.
5. Place the two (8) Keys into the grooves of the (13) Shaft
Balancer. Place the (6) Rotor onto the shaft of the Shaft
Balancer, making sure that it is a light slip t.
Press Tool Top
Press Tool Base
Spacer
Bearing
Washer
Spindle
T-1B
T-1A
Dust Shield
10
6. Place the (4) Cylinder Assembly over the (6) Rotor with the
shorter end of the spring pin engaging the blind hole in the
(9) Front Endplate. Note: The spring pin must project 1.5
mm (.060 in.) above the anged side of the Cylinder. Oil the
ve (7) Vanes with a quality pneumatic tool oil and place in
the slots in the Rotor. One or two drops of oil should be suf-
cient.
7. Press t the rear (2) Bearing (2 shields) into the (3) Rear
Endplate with the T-1B Bearing Press Tool. Make sure the
T-1B Press Tool is centered on the O.D. of the outer race of
the Bearing. Lightly press t the Rear Endplate and Bearing
over the (13) Shaft Balancer using the small end of the
(MPA0494) T-13 Bearing Press Sleeve. The Sleeve should
press only the inner race of the Bearing. Important: The
Rear Endplate and Bearing is pressed correctly when the (4)
Cylinder is squeezed just enough between the endplates to
stop it from moving freely under its own weight when the mo-
tor assembly is held horizontal, but be able to slide between
the Endplates with a very light force. If pressed too tightly the
motor will not run freely. If the pressed assembly is to loose,
the motor will not turn freely after assembly in the (33) Motor
Housing.
8. Secure the assembly by placing the (1) Retaining Ring in the
groove of the (13) Shaft Balancer. Caution: The Retaining
Ring must be placed so that the middle and two ends of the
hoop touch the (2) Bearing rst. Both raised center portions
must be securely “snapped” into the groove in the Shaft
Balancer by pushing on the curved portions with a small
screwdriver.
9. Lightly grease the (5) O-Ring and place in the air inlet of the
(4) Cylinder Assembly.
10. Lightly grease or oil the inside diameter of the (33) Motor
Housing, line up the spring pin of the (4) Cylinder Assembly
with the marking on the Motor Housing and slide the Motor
Assembly into the Motor Housing. Make sure the Spring
Pin engages the pocket in the Motor Housing. Carefully
screw the (12) Lock Ring into the Motor Housing with the
(MPA0025) T-6 Motor Lock Ring Wrench/Spindle Puller Tool.
Torque settings to be 6.2-7.3 N-m (55-65 in-lbs). Note: A
simple technique to assure rst thread engagement is to turn
the Lock Ring counter-clockwise with the T-6 Motor Lock
Ring Wrench/Spindle Puller while applying light pressure.
You will hear and feel a click when the lead thread of the Lock
Ring drops into the lead thread of the housing.
11. Spin on a new (24) Pad and hand-tighten it using the (23)
Pad Wrench.
Testing:
Place 3 drops of quality pneumatic air tool oil directly into the
motor inlet and connect the machine to a 6.2 bar (90-psig) air
supply. A 12,000 RPM tool should run between 11,500 to 12,500
RPM when the air pressure is 6.2 bar (90-psig) at the inlet of the
tool while the tool is running at free speed. This free speed will
be about 500 rpm to 1,000 RPM less when a Vacuum or Hook
Face Pad is used because of wind resistance. This will not affect
performance when sanding.
* Loctite® is a registered trademark of the Loctite Corp.
DOC A2233 REV 05/08/12
KWH Mirka Ltd
Finland
Tel. +358 20 760 2111
www.mirka.com
Mirka (UK) Ltd
United Kingdom
Tel. +44 1908 375 533
Mirka Schleifmittel GmbH
Germany
Tel. +49 6196 7616-0
Mirka Abrasives Inc.
USA
Tel. +1 330 963 6421
www.mirka-usa.com
Mirka Scandinavia AB
Sweden, Norway, Denmark
Tel. +46 54 690 950
Mirka Abrasifs s.a.r.l.
France
Tel. +33 1 4305 4800
ventes[email protected]
Mirka Italia s.r.l.
Italy
Tel. +39 0733 207511
www.mirkaitalia.com
KWH Mirka Ibérica S.A.U.
Spain
Tel. +34 93 682 09 62
mirkaiber[email protected]
KWH Mirka Mexicana S.A. de C.V.
México
Tel. +52 55 5148 3212
www.mirka.com.mx
Mirka Brasil Ltda.
Brasil
Tel. +55 11 5543 3639
Mirka Asia Pacific Pte Ltd
Singapore
Tel. +65 6733 5422
Mirka Trading Shanghai Co., Ltd
China
Tel. +86 21 6390 0018
Mirka Rus LLC
Russia
Tel. +7 812 640 27 77
Mirka Abrasives Canada Inc.
Canada
Tel. +1 330 963 6421
Mirka India Pvt Ltd
India
Tel: +91 11 4949 3333
www.mirka.com
Orbital Sander Pärm.indd 2 2010-12-08 01.05
Quality from start to finish
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