MIRKA MR-38SGV User manual

(3 x 8 in.)

Parts Page
1
TO VACUUM
SYSTEM FOR
CENTRAL VAC
TO
INLET
TO
INLET
2
3
4
5
6
7
8
9
10
11
12
13 15
14
16
17
18
19
20
21
22
23
24
25
26
28
31
32
33 34
35
36
37
38
39
40
41
42
43
44
45
46 47
36
37
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
69
70
30
68
67
27
29
72
71
REVISION RECORD
R DESCRIPTION / DATE
A
RELEASED TO PRODUCTION.
MDR 08/19/10 PWH 08/19/10
B
XPA1697 WAS XPA0786. XPA0766 WAS
XPA1989. ITEM# 71 XPA2541, #72 XPA2542
WAS NOT ON.
MDR 09/23/10 PWH 09/30/10
C
TORQUE SETTING CHART ITEM #S
INCORRECT: 34 WAS 36, 37 WAS 39, 42
WAS 44, 44 WAS 46, 45 WAS 47, 50 WAS 52,
54 WAS 56, 56 WAS 58, 66 WAS 68. NOTE #2
58 WAS 68.
MDR 10/20/10 PWH 10/21/10
D
-ITEM 67: XPA0200-Z WAS NOT ON
MCC 11/03/15 KVN 11/03/15
E
-ITEM 67 : XPA0200-Z WAS REMOVED
-ITEM 63 QTY : "OPT" WAS "1"
Allen 06/22/16 Kevin 06/22/16
IT P/N DESCRIPTION QTY
1 XPA0040 EXTERNAL RETAINING RING 1
2 XPA0021
10 X 26 X 8 BEARING - 2 SHIELDS 1
3 XPB0017
REAR ENDPLATE 1
4 XPA0005
20 mm CYLINDER ASSEMBLY 1
5 XPA0042
5 mm x 2.0 mm O-RING 1
6 XPB0005
MACHINED ROTOR 1
7 XPA0010
VANE 5
8 XPA0041
3 mm x 13 mm WOODRUFF KEY 1
9 XPB0016
FRONT ENDPLATE 1
10 XPA0019
12 X 28 X 8 BEARING - 2 SHIELDS 1
11 XPA0045
39.4 mm x 3.1 mm O-RING 1
12 XPA0001
LOCK RING 1
13 XPB0531
70 X 198mm, 1/8 in. (3mm) ORBIT OS AirSHIELD™ SHAFT BALANCER 1
14 XPA0122
FILTER 1
15 XPA0121
DUCKBILL CHECK VALVE 1
16 XPA0120
VALVE RETAINER 1
17 XPA0090
11.9 mm (15/32 in.) RETAINING RING 1
18 XPA0938
12 x 28 x 16 DOUBLE ROW ANGULAR CONTACT BEARING - 1 SEAL 1
19 XPA0016
SPACER 12.1 ID x 18.0 OD x 0.2 THK 1
20 XPA0017
BELLEVILLE WASHER 1
21 XPA0018
RETAINING RING 1
22 XPA0113
SPINDLE ASSEMBLY 1
23 XPA0079
SPACER 6.5 ID x 20.0 OD x 0.2 THK 1
24 XPA0080
SPACER 6.5 ID x 20.0 OD x 0.4 THK 1
25 XPA1697
THROTTLE LEVER FOR MIRKA 10,000 OPM 3.0 mm (1/8 in.) ORBIT SANDERS 1
26 XPA0031 LEVER SPRING PIN 1
27 XPA0288
GRIP, 2 1/2 in. YELLOW PMS 123 C OPT
27 XPA0289 GRIP, 2 3/4 in YELLOW PMS 123 C OPT
27 XPA0290 GRIP, 3 in. YELLOW PMS 123 C 1
28 XPA0015
VALVE SLEEVE 1
29 XPA0227
HOUSING FOR MIRKA 3 in. LW, MACHINED 1
30 XPA0008
VALVE STEM ASSEMBLY 1
31 XPA0043
9 mm x 1.5mm O-RING 1
32 XPB0014
SPEED CONTROL 1
33 XPA0039
INTERNAL RETAINING RING 1
34 XPA0768
HEX SOCKET BUTTON HEAD MACHINE SCREW M4 x 12 4
35 XPA0076
M4 WASHER 4.3 ID x 9 OD x 0.8 THK 4
36 XPA0071
THREADED INSERT 4 MM 2
37 XPA0770 HEX SOCKET HEAD CAP SCREW M4 x 40 2
38
XPD0051 70 X 198 NON-VACUUM SHROUD 2
39 XPA0169
SHROUD SEAL 1
40
XPD0052 70x198mm CV/SGV SHROUD 1
41
XPC0230 ASSEMBLY FOR 70mm WIDE OS PAD SUPPORT 2
42 XPA0766
HEX SOCKET COUNTERSUNK HEAD MACHINE SCREW M4 x 6 4
43 XPB0534
70 x 198mm OS PAD BACKING - BLACK, MACHINED 1
44 XPA0767
HEX SOCKET COUNTERSUNK HEAD MACHINE SCREW M4 x 10 4
45 XPA0078
SOCKET FLAT COUNTER SUNK MACHINE SCREW M6 x 14 1
46 N/A
1 Pad Supplied With Each Tool (Type Determined By Model) 1
47 XPA0864 2.5 mm HEX WRENCH 1
48 XPA0032
MUFFLER INSERT (for 10,000 RPM Machines) 2
49 XPA0038
MUFFLER PLATE 1
50 XPA0166
MUFFLER HOUSING 1
51 XPA0009 VALVE SEAT 1
52 XPA0007 VALVE 1
53 XPA0014 VALVE SPRING 1
54 XPA0013
1/4-18 NPT INLET BUSHING ASSEMBLY 1
55 XPA0044
14.0 x 1.5 O-RING 2
56 XPA0722
10,000 RPM SVG RETAINER 1
57 XPA0410
ASSEMBLY FOR 1 in/28 mm HOSE SuperVAC SGV SWIVEL EXHAUST FITTING 1
58 XPA0409
ASSEMBLY FOR 3/4 in./19 mm HOSE SuperVAC SWIVEL EXHAUST FITTING OPT
59 XPA0778 1 in./28 mm HOSE SEAL 1
60 XPA0854
3/4 in./19 mm HOSE SEAL OPT
61 XPA0931 MIRKA 1 in./28 mm HOSE SEAL TAG W/INSTRUCTION 1
62 XPA0092
1 in/28 mm OS SuperVAC CV SWIVEL EXHAUST ASSEMBLY 1
63 XPA0298
OS SuperVAC 3/4 in CV SWIVEL EXHAUST ASSEMBLY OPT
64 XPA0048 M5 x 0.8 FLANGED NUT 1
65 XPA0047
M5 WASHER 1
66 XPA0769
HEX SOCKET BUTTON HEAD MACHINE SCREW M5 x 10 1
67 XPA0300
Ø 3/4 in. VAC HOSE TO Ø 3/4 in. x 1 in./28 mm ADAPTER COUPLING AND AIRLINE ASSM OPT
68 XPA0411 Ø 3/4 in. VAC HOSE TO DOUBLE BAG FITTING AND AIRLINE ASSY OPT
68 XPA0412 Ø 1 in. VAC HOSE TO DOUBLE BAG FITTING AND AIRLINE ASSY 1
69 XPA0464
INSERT FOR MIRKA VACUUM BAG 1
70
XPC0110 VACUUM BAG 1
71 XPA2541
FRONT BEARING DUST SHIELD 1
72 XPA2542
SPINDLE BEARING DUST SHIELD 1
ITEM
TORQUE SETTING
Nm (in.-lbs.)
12 6.2 - 7.3 (55 - 65)
34 2.2 - 2.8 (20 - 25)
37 2.2 - 2.8 (20 - 25)
42 2.8 - 3.4 (25 - 30)
44 2.8 -3.4 (25 - 30)
45 10.7 -11.8 (95 - 110)
50 1.8 - 2.3 (16 - 20)
54 6.8 - 8.1 (60 - 72)
56 4.0 - 5.4 (36 - 48)
66 3.4 - 3.9 (30 - 35)
XPC0318
P/N
TITLE
DRWN BY / DATE
MATERIAL
PROPRIETARY AND CONFIDENTIAL
THE INFORMATION CONTAINED IN THIS DRAWING IS THE SOLE
PROPERTY OF X'POLE PRECISION TOOLS INC. ANY REPRO-
DUCTION IN PART OR AS A WHOLE WITHOUT THE WRITTEN
PERMISSION OF X'POLE PRECISION TOOLS INC. IS PROHIBITED.
CKD BY / DATE
ENG APP / DATE
STD TOL
.X +/-
.XX +/-
.XXX +/-
XX/XX +/-
ANGLES +/-
0.1
0.05
NA
NA
0.5°
X'POLE
PRECISION
TOOLS INC.
MDR
08/18/10
08/19/10
PWH
REVISED 05/26/09
NA
PARTS PAGE FOR MIRKA
70x198mm 10,000 OPM OS
G
H
I
J
E
A
H
F
D
C
B
K
Original Instructions
H
L

Parts List
Item P/N Description Qty.
1 MPA0040 EXTERNAL RETAINING RING 1
2 MPA0021 BEARING - 2 SHIELDS 1
3 MPB0017 REAR ENDPLATE 1
4 MPA0005 CYLINDER ASSEMBLY 1
5 MPA0042 O-RING 1
6 MPB0005 ROTOR 1
7 MPA0010 VANE 5
8 MPA0041 WOODRUFF KEY 1
9 MPB0016 FRONT ENDPLATE 1
10 MPA0019 BEARING - 2 SHIELDS 1
11 MPA0045 O-RING 1
12 MPA0001 LOCK RING 1
13 MPB0531 SHAFT BALANCER 1
14 MPA0122 FILTER 1
15 MPA0121 DUCKBILL CHECK VALVE 1
16 MPA0120 VALVE RETAINER 1
17 MPA0090 RETAINING RING 1
18 MPA0938 DOUBLE ROW ANGULAR CONTACT BEARING - 1 SEAL 1
19 MPA0016 SPACER 0.2 THK 1
20 MPA0017 BELLEVILLE WASHER 1
21 MPA0018 RETAINING RING 1
22 MPA0113 SPINDLE ASSEMBLY 1
23 MPA0079 SPACER 0.2 THK 1
24 MPA0080 SPACER 0.4 THK 1
25 MPA1697 THROTTLE LEVER 1
26 MPA0031 LEVER SPRING PIN 1
27
MPA0288 GRIP, 2 1/2 in. OPT
MPA0289 GRIP, 2 3/4 in OPT
MPA0290 GRIP, 3 in. 1
28 MPA0015 VALVE SLEEVE 1
29 MPA0227 HOUSING 1
30 MPA0008 VALVE STEM ASSEMBLY 1
31 MPA0043 O-RING 1
32 MPB0014 SPEED CONTROL 1
33 MPA0039 INTERNAL RETAINING RING 1
34 MPA0768 SCREW 4
35 MPA0076 WASHER 0.8 THK 4
36 MPA0071 THREADED INSERT 2
37 MPA0770 SCREW 2
38 MPD0051 NON-VACUUM SHROUD 2
39 MPA0169 SHROUD SEAL 1
40 MPD0052 CV/DB SHROUD 1
41 MPC0230 PAD SUPPORT 2
42 MPA0766 SCREW 4
43 MPB0534 PAD BACKING 1
44 MPA0767 SCREW 4
45 MPA0078 SCREW 1
46 N/A SCREEN ABRASIVE MOLDED INSERT PAD LAYOUT 1
47 MPA0864 HEX WRENCH 1
48 MPA0032 MUFFLER INSERT (for 10,000 RPM Machines) 2
49 MPA0038 MUFFLER PLATE 1
50 MPA0166 MUFFLER HOUSING 1
51 MPA0009 VALVE SEAT 1
52 MPA0007 VALVE 1
53 MPA0014 VALVE SPRING 1
54 MPA0013 INLET BUSHING ASSEMBLY 1
55 MPA0044 O-RING 2
56 MPA0722 10,000 RPM DB RETAINER 1
57 MPA0410 ASSEMBLY FOR 1 in./28 mm HOSE SuperVAC DB SWIVEL EXHAUST FITTING 1
58 MPA0409 ASSEMBLY FOR 3/4 in./19 mm HOSE SuperVAC SWIVEL EXHAUST FITTING OPT
59 MPA0778 1 in./28 mm HOSE SEAL 1
60 MPA0854 3/4 in./19 mm HOSE SEAL OPT
61 MPA0931 MIRKA 1 in./28 mm HOSE SEAL TAG W/INSTRUCTION 1
62 MPA0092 1 in./28 mm OS SuperVAC CV SWIVEL EXHAUST ASSEMBLY 1
63 MPA0298 OS SuperVAC 3/4 in. CV SWIVEL EXHAUST ASSEMBLY OPT
64 MPA0048 FLANGED NUT 1
65 MPA0047 WASHER 1
66 MPA0769 SCREW 1
67 MPA0300 Ø 3/4 in. VAC HOSE TO Ø 3/4 in. x 1 in./28 mm ADAPTER COUPLING AND AIRLINE ASSM OPT
68 MPA0412 Ø 1 in. VAC HOSE TO DOUBLE BAG FITTING AND AIRLINE ASSY 1
MPA0411 Ø 3/4 in. VAC HOSE TO DOUBLE BAG FITTING AND AIRLINE ASSY OPT
69 MPA0465 10 PACK OF VACUUM BAG INSERTS 1
70 MPA0658 VACUUM BAG 1
71 MPA2541 FRONT BEARING DUST SHIELD 1
72 MPA2542 SPINDLE BEARING DUST SHIELD 1

Sander Spare Parts Kits
A MPA0805
10,000 OPM Mufer Kit
Code: 8993017211
B MPA0802
Spindle Bearing Kit
Code: 8993019711
C MPA0798
Air Inlet Kit
Code: 8993018811
H MPA0799
Endplate Bearing Kit
Code: 8993019811
I MPA0800
Speed Valve Kit
Code: 8993019011
J MPA0801
Rotor, Vanes & Key Kit
Code: 8993017711
Scaled 50%
Scaled 50%
Scaled 50%
Scaled 50%
E MPA0994
Cylinder & O-ring Kit
Code: 8993009211
F MPA0993
Lock Ring & O-ring Kit
Code: 8993007911
D MPA0932
DB Swivel Fitting Kit
Code: 8993011311
G MPA3207
CV Swivel Fitting Kit
Code: 8991600311
K MPA1672
Screw Kit
Code: 8993015511
L MPA2697
DB Retainer Kit
Code: 8991600911
REVISED 05/26/09

Putting the Tool into Service
Operating Instructions
Work Stations
Proper Use of Tool
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
specied without consulting the manufacturer or the manufac-
turer’s authorized supplier. Do not use back-up pads that have a
working speed less than 10,000 OPM 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 used in any position but before any such use,
the operator must be in a secure position and have a rm grip
and footing, 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 the tool to the air
supply and run the 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 servicing and repairs 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 the 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 stopping. This will prevent gouging of the work
due to excess speed of the abrasive.
5) Always disconnect the air supply from 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 the 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. The vacuum dust
collection bag should be cleaned or replaced daily.
Cleaning or replacing of the bag also assures opti-
mum performance.
11) Do not exceed the maximum recommended air pres-
sure.
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 working area before use.
13) Take care to avoid entanglement of 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, stop using it immediately and arrange for servicing
and repair.
16) Do not allow the tool to free speed without taking precautions to protect any persons or
objects from the loss of the abrasive or pad.
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

Specications 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 sufcient for risk
evaluation. Values measured in a particular work place may be higher than the declared values. The actual exposure values and amount of
risk or harm experienced by an individual are unique to each situation and depend 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 physical 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.
Product Conguration/Specications: 10,000 OPM Orbital Sander
Product Conguration and Specications: 10,000 OPM 70 mm x 198 mm (3 in. x 8 in.) Orbital Sander
Note: All vacuum machines use Ø 28 mm (1 in.) Vacuum hose ttings standard. Ø 19 mm (3/4 in.) is available.
Orbit Vac
Type
Pad
Size mm
(in.)
Model
Number
Product Net
Weight
kg (pounds)
Height
mm (inch)
Length
mm
(inch)
Power
watts
(HP)
Air Consumption
LPM (scfm)
*Noise
Level
dBA
*Vibration
Level
m/s2
*Uncertainty
K
m/s2
3 mm
(1/8
in.)
Central
Vacuum
70 x 198
(3 x 8) OS383CV 0.96 (2.1) 118 (4.65)
248
(9.76) 179 (0.24) 453 (16) 75 3.3 0.83
Self-
Gen
Vacuum
70 x 198
(3 x 8) OS383DB 0.97 (2.14) 118 (4.65)
261
(10.26) 179 (0.24) 453 (16) 85 2.8 0.77
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) and EN ISO 11203:2009 Acoustics-Noise emitted by machinery and equipment-Determination of emission sound pressure levels at a
work station and other specied positions from the sound power level.
The vibration test is carried out in accordance with EN ISO 28927-3, Hand-held portable power tools – Test method for evaluation of vibration emission
– Part 3: Polishers and rotary , orbital and random orbital sanders.

Symptom Possible Cause Solution
Low power and/or low free
speed.
Insufcient 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 Mufer(s). See the ”Housing Disassembly“ section for Mufer
removal. Replace item 48, Mufer Insert (see the
”Housing Assembly“ section).
Plugged Inlet Screen. Clean the Inlet Screen with a clean, suitable clean-
ing solution. IIf the Screen cannot be cleaned,
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-install the Motor Assembly. See ”Motor Disas-
sembly“ 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 worn 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 Sander
Pad face that was not specically 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 central 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 CV machines reduce vacuum through the
vacuum system.
Troubleshooting Guide
Learn more about air sanders and polishers we have.