MIRKA AP 300NV User manual

1
Parts Page
B
A
C
D

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Parts List
Item Description Qty.
1 MOTOR HOUSING 1
2 SET SCREW 1
3 OILER 1
4 SHIELD 1
A BEARING AND VANES KIT
5 BEARING 1
6 REAR END PLATE 1
7 SPRING PIN 2
8 ROTOR 1
A BEARING AND VANES KIT
9 VANES 4
10 SPACER 1
11 CYLINDER 1
12 FRONT END PLATE 1
A BEARING AND VANES KIT
13 O-RING 1
14 BEARING 1
15 SPACER 1
16 BEARING 1
17 BEARING 1
18 NEEDLE ROLLER 2
19 NEEDLE BEARING 2
20 PLANET GEAR 2
21 PLANETARY CARRIER 1
22 RING GEAR 1
23 ADAPTER(1/4”-20) 1
24 REAR EXHAUST COVER 1
25 LOCK NUT 1
26 GASKET 1
27 AIR GUIDE 1
28 GASKET 1
29 THROTTLE HANDLE 1
30 THROTTLE LEVER 1
31 SPRING PIN 1
32 GRIP 1
DMUFFLER AND O-RING KIT
33 MUFFLER FELT 1
34 MUFFLER PLATE 1
35 AIR INLET BUSHING 1
36 THROTTLE VALVE 1
B O-RING AND VALVE SPRING KIT
37 O-RING 2
38 O-RING 1
39 VALVE STEM 1
B O-RING AND VALVE SPRING KIT
40 VALVE SPRING 1
41 AIR REGULATOR 1
42 SANP RING 1
C QUICK LOCK KIT
43 SET SCREW 1
44 ADAPTER(1/4”-20) 1
45 Backing Pad 77mm 1/4” 1
46 Backing Pad Quick Lock 32mm OPT
47 14mm WRENCH 1
C QUICK LOCK KIT
48 L SHAPE HEX WRENCH(3.0mm) 1

3
Spare Parts Kits
BAOS107 O-Ring & Valve Spring Kit
Code: 8992331071
AAOS121 Bearing & Vanes Kit
Code: 8992331211
CQuick Lock Kit
Code: 8992324411 D Mu󰀪er and O-Ring Kit
Code: 8992321091

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Manufacturer/Supplier
Mirka Ltd.
FI-66850 Jeppo
Finland
Tel: + 358 20 760 2111
Required Personal Safety Equipment
Safety Glasses Breathing Masks
Safety Gloves Ear Protection
Operator Instructions
Includes – Please Read and Comply, Proper Use of Tool,
Work Stations, Putting the Tool Into Service, Operating In-
structions, Product Conguration/Specications Tables, Parts
Page, Parts List, Trouble shooting guide.
Important
Read these instructions care-
fully before installing, operating,
servicing or repairing this tool.
Keep these instructions in a safe
accessible location.
Declaration of conformity
Mirka Ltd.
FI-66850 Jeppo, Finland
declare on our sole responsibility that the product
Mirka® AP 300NV 3,200 rpm Polisher )see “Product Conguration/Specications” table for particular model(
to which this declaration relates is in conformity with the following standard(s) or other normative document(s) EN ISO 12100:2010, EN ISO 11148-
8:2011, EN ISO 15744:2008 & EN 28927-3:2009 in accordance with the regulation 2006/42/EC.
Place and date of issue Company Stefan Sjöberg, CEO
Original Instructions
AP 300NV
77 mm Polisher
Jeppo 04.06.2020
WARNING
Always wear required personal safety protection in accordance with manufacturer’s instructions and local/national standards while
using this tool.
• Do not use a power tool if you are tired or under the inuence of drugs, alcohol or medication.
• Read the Materials Safety Data Sheet )MSDS( for the working surface.
• Use the tool with dust extraction. A suitable dust extraction unit will reduce hazardous dust.
• Do not overreach. Keep proper footing and balance at all times.
• Do not wear loose clothing or jewellery. Keep your hair, clothing and gloves away from moving parts.
Loose clothes, jewellery or long hair can be caught in moving parts.
• If any physical hand/wrist discomfort is experienced, stop working and seek medical attention.
Hand, wrist and arm injury may result from repetitive work, motion and overexposure to vibrations.
• Do not operate power tools in explosive atmospheres, such as in the presence of ammable liquids, gases or dust.
• The tool is not electrically insulated. Check work area for live electricity, gas pipes, etc. before operation.
CAUTION
• Prevent unintentional starting.
• Remove pad wrench before connecting the tool to the air supply.
• Keep work area clean and well lit.
• Always ensure that the work piece to be sanded is rmly xed.
• Before changing abrasive always disconnect the air supply.
Additional safety warnings
• Read all instructions before using this tool. All operators must be fully trained in usage and safety of this tool.
• All maintenance must be carried out by trained personnel. For service, contact Mirka authorized service centre!
• Always wear required safety equipment )see warnings(.
• The operator must be in a secure position and have a rm grip and footing on a solid oor.
• Always ensure that the work piece to be sanded is rmly xed.
• Check tool, backing pad, hose and ttings regularly for wear.
• Always take care to ensure your safety at work; never carry, store or leave the tool unattended with the air supply connected.
• Vacuum unit dust collection bag should be cleaned or replaced daily. Dust can be highly combustible.
Cleaning or replacing of bag also assures optimum performance.
• Do not exceed maximum recommended air pressure of 6.2 bar )90 psi(.
• Take care to avoid entanglement of the moving parts of the tool with clothing, ties, hair, cleaning rags, etc.
• Keep hands clear of the spinning pad during use.
• If the tool appears to malfunction, remove from use immediately and arrange for service and repair.
• Before changing abrasive always disconnect the air supply. Take care to properly attach and centre the abrasive
on the backing pad.

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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 O󰀩ce; 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 tool is designed for use on all types of materials i.e. metals,
wood, stone, plastics, etc. using abrasive designed for this pur-
pose. Do not use this tool for any other purpose than that speci-
ed without consulting the manufacturer or the manufacturer’s
authorized supplier. Do not use back-up pads that have a working
speed less than 3,200 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 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 tool 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-o󰀨 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 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. Take care to 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 tool before t-
ting, 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 tool.
7) Use only correct spare parts.
8( Always ensure that the material to be sanded is rmly
xed to prevent its movement.
9( Check the 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( Do not exceed the maximum recommended air pressure.
Use safety equipment as recommended.
11) 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 operation.
12) 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, which can be very dangerous.
13) Keep hands clear of the spinning pad during use.
14) If the tool appears to malfunction, remove from use immediately and arrange for service and
repair.
15) 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
Figure 1

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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 su󰀩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 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 physical condi-
tion of the user. 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:
https://osha.europa.eu/en (Europe)
http://www.osha.gov (USA)
Product Conguration/Specications: AP 300NV 3,200 rpm
Orbit Pad Size
mm (in.)
Model
Number
Product Net
Weight
kg (pounds)
Height
mm (inch)
Length
mm (inch)
Power
watts (HP)
Air Consump-
tion LPM (scfm)
*Noise
Level
dBA
*Vibration
Level
m/s2
*Uncertainty
K
m/s2
NA 77
(3) AP 300NV 0.66 (1.46) 113.0 (4.45)
172.5
(6.79) 298 (0.40) 626 (22) 76.0 1.34 0.63
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 vibra-
tion emission – Part 3: Polishers and rotary , orbital and random orbital sanders.
Greasing Instructions:
Hold the tool in a horizontal position to keep the grease in the correct position.
Lubricate with gear grease )molybdenum disulde( using a suitable grease gun
through the (3) Oiler with 2 to 3 plunges for 24 hours of use.
Technical data
Mirka® AP 300NV
Recommended Airline Size - Minimum 10 mm 3/8 in
Recommend Maximum Hose Length 8 meters 25 feet
Air Pressure - Maximum Working Pressure 6.2 bar 90 psig
Air Pressure - Recommended Minimum NA

31
Symptom Possible Cause Solution
Low power and/or low free
speed.
Insu󰀩cient air pressure. Check air line pressure at the Inlet of the tool while
the tool is running at free speed. It must be 6.2 bar
(90 psig/620 kPa).
Clogged Mu󰀪er)s(. The Mu󰀪er can be back-ushed with a clean, suit-
able cleaning solution until all contaminants and
obstructions have been removed. If the Mu󰀪er can
not be properly cleaned then replace it. Replace
Mu󰀪er Insert.
Plugged Inlet Screen. Clean the Inlet Screen with a clean, suitable
cleaning solution. If 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.
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 Shield
engagement. Check for damaged O-Ring in Front
End Plate. Remove Motor Assembly and re-install
the Motor Assembly.
Motor parts worn. Overhaul Motor. Contact authorized Mirka Service
Center.
Worn or broken Gear Bearings. Replace the worn or broken Gears and/or Bear-
ings.
Air leakage through the Air
Regulator and/or Valve Stem.
Dirty, broken or bent Valve Spring, Valve
or O-Ring.
Disassemble, inspect and replace worn or dam-
aged parts.
Vibration/rough operation.
Incorrect Pad. Only use Pad sizes and weights designed for the
machine.
Addition of interface pad or other material. Only use abrasives and/or interfaces designed for
the machine. Do not attach anything to the Tool’s
Pad face that was not specically designed to be
used with the Pad and Tool.
Improper lubrication or buildup of foreign
debris.
Disassemble the Tool and clean in a suitable
cleaning solution. Reassemble the Tool.
Worn or broken Rear or Front Motor
Bearing(s).
Replace the worn or broken Bearings.
Troubleshooting Guide
AP 300NV Rev 05/19/22