Pallmann COBRA CLASSIC Quick guide

Translation of the original Operating instructions
ParquetoorsanderCOBRACLASSIC2,5kW/50Hz
with gentle lifting lever
COBRACLASSIC230V2,5kWneutral #071845
COBRACLASSIC230V2,5kWCH  #075488
COBRACLASSIC230V3,2kWAUS  #075490
COBRACLASSIC230V2,5kWNO  #075489
Manual #076697
PALLMANN GmbH l Ein Unternehmen der Uzin Utz AG | Im Kreuz 6 | 97076 Würzburg | www.pallmann.net

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PALLMANN GmbH l Ein Unternehmen der Uzin Utz AG | Im Kreuz 6 | 97076 Würzburg | Telefon [phone] | Telefax [phone] I www.pallmann.net
© 2015
All rights reserved.
Reproduction on whole or in part requires written permission from
WOLFF GmbH & Co. KG, Ungerhalde 1, D-74360 Ilsfeld, Germany.
No liability for any damage arising from the use of this brochure.
Subject to alterations.
WOLFF GmbH & Co. KG
Ungerhalde 1
D-74360 Ilsfeld
Deutschland
Fon: [phone]
Fax: [phone]
www.wol󰀨-tools.de | info@wol󰀨-tools.de
Stand: 11/2018

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Inhalt:
1 Introduction................................................................................................................................... 4
2Scopeofdelivery............................................................................................................................. 5
3MachinespecicationsCOBRACLASSIC...................................................................................... 6
3.1 Important components..................................................................................................................... 6
3.2 Technical data................................................................................................................................. 7
3.3 Safety and machine protection facilities.......................................................................................... 7
4Proper use...................................................................................................................................... 7
5Assemblyofthemachine............................................................................................................. 8
5.1 Installing the guide tube.................................................................................................................. 8
5.2 Installing the motor ......................................................................................................................... 8
6Disassemblingfortransport ....................................................................................................... 9
6.1 Removing the guide tube ............................................................................................................... 9
6.2 Removing the motor........................................................................................................................ 10
7OperatingtheCOBRACLASSIC ................................................................................................. 11
7.1 Protective clothing and equipment ................................................................................................. 11
7.2 Fitting the dust bag........... .............................................................................................................. 11
7.3 Safety instructions regarding dust .................................................................................................. 12
7.4 Disposing of sanding dust .............................................................................................................. 12
7.5 Replacing the sanding belt.............................................................................................................. 13
7.6 Adjusting the sanding pressure ...................................................................................................... 14
7.7 Safety instructions for electric cable and connectors...................................................................... 14
7.8 Connecting the COBRA CLASSIC to the mains power .................................................................. 15
7.9 Remarks about sanding parquet and plank oors .......................................................................... 16
7.10 Sanding with the COBRA CLASSIC................................................................................................ 19
8Maintenance ................................................................................................................................. 24
8.1 Changing the sanding drum ........................................................................................................... 24
8.2 Adjusting the running wheels ......................................................................................................... 26
8.3 Adjusting the castor wheels ........................................................................................................... 27
8.4 Adjusting the tension roller ............................................................................................................. 28
8.5 Changing the belt............................................................................................................................ 29
8.6 Checking dust extraction ................................................................................................................ 30
8.7 Switching o󰀨 and storing the machine............................................................................................. 30
9Declarationofconformity................................................................................................................. 31
10 Warranty.......................................................................................................................................... 32

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PALLMANN GmbH l Ein Unternehmen der Uzin Utz AG | Im Kreuz 6 | 97076 Würzburg | Telefon [phone] | Telefax [phone] I www.pallmann.net
1 Introduction
Dear customer,
you have decided in favour of the WOLFF parquet  oor sander COBRA CLASSIC, the correct
choice with respect to quality and performance.
The COBRA CLASSIC is the result of a consistent implementation of many years of experience.
This machine combines an extraordinary high sanding performance and an excellent sanding
quality, together with an easy to operate, proven and reliable technology.
This operating instructions contain important informations for the use and safe operation of the
COBRA CLASSIC.
Caution!
Readtheseoperatinginstructionscarefullybeforeassemblingoroperatingthe
COBRA.Ensurethatalloperatorsreadtheseoperatinginstructionspriortooperate
themachine.
Adherencetothesafetynoteshelpstoprotectagainstpotentialdangersforhealth
andpersonalsafetyandtopreventanimproperutilisationofthemachine.
Beforestartingtowork,makeyourselffamiliarwiththeoperationofthemachine.
It‘stoolateifyoudoitwhileworking!
Neverallowanybodywithoutsufficientskillsandknowledgetooperatethemachine
This brochure uses the symbol to mark important instructions for safety
and preventing damage. Please give special attention to the marked instructions.
They refer to a potentially dangerous situation. Failure to comply can result
in fatal or severe injuries and damage to property.
This brochure uses the symbol
to mark important instructions for safety
and preventing damage. Please give special attention to the marked instructions.
They refer to a potentially dangerous situation. Failure to comply can result
in fatal or severe injuries and damage to property.

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1 machine
2 dust bag
3 cable with plug and coupling
4 respirator
5 Multiclip
6 operating instructions
7 hexagon socket screw key 5 mm
8 hexagon socket screw key 6 mm
9 hexagon socket screw key 10 mm
10 running wheel adjusting tool
11 tool pouch
12 fork wrench 10 mm
13 fork wrench 13 mm
14 fork wrench 24 mm
15 double fork wrench 30/36 mm
16 hearing protectors
2 Scopeofdelivery

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3 MachinespecicationsCOBRACLASSIC
3.1Importantcomponents
1 pressure regulating screw
2 castor wheels
3 running wheels
4 drum cover
6 tension lever
7 cylinder head bolt
8 clamping lever
9 motor plug
10 carrying handle
11 bumper wheel
12 belt guard
13 motor
14 switch box
15 dust bag
16 cable arm
17 left hand grip
18 main lifting lever
19 right hand grip
20 gentle lifting lever

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3.2Technicaldata
Single-phase AC motor....................................................... 230 V, 50 cps
Motor power ............................................................................... 2500 W
Sanding drum speed................................................................. 2100 rpm
Sanding width............................................................................. 200 mm
Sanding belt dimensions ............................ 200 mm x 750 mm, endless
Gesamtgewicht .......................................................................... 83,5 kg
Gewicht Chassis ........................................................................ 42,5 kg
Gewicht Motor ........................................................................... 33,0 kg
Gewicht Führungsrohr ................................................................ 8,0 kg
3.3Safetyandmachineprotectionfacilities
COBRA CLASSIC is equipped with an
- overcurrentcutoutandan
- no-volt release
The overcurrent cutout protects the machine from damage and persons from endangering
in the case of short circuits.
The no-volt release prevents uncontrolled restart of the machine after power failure. The motor
will not restart automatically when the power returns, it will have to be switched on again.
4Properuse
TheparquetoorsanderCOBRACLASSICissuitablefordrysandingofparquetand
plankoors.Nootheruseisallowed.
Caution!
NeveruseCOBRACLASSICforwetprocedures(mortalriskfromelectricshock)!

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5 Assemblyofthemachine
5.1 Installingtheguidetube
Note! The Cobra Classic is delivered with the guide tube (1) removed.
Caution!Injurytotheoperatororotherpersonscouldoccurordamagecouldoccurifthemachine
startsupunintentionally.Disconnectthemachinefromthepowersupplybeforeworking
onthemachine!
Instructions:
1. Insert the guide tube (1) into the guide tube support (7). The curved section of the tube must
face toward the motor. Clamp the guide tube by means of the clamping lever (6) located on
the guide tube support.
2. Fit the connector (8) into the both screws of th pull rod
3. Move the main lifting lever (2) into the rear position to raise the sanding drum from the  oor.
4. Tighten both wing nuts
5.2 Installingthemotor:
Installation of the motor is performed in the opposite order to the steps described in Chapter 6.2
Removing the motor.

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6 Disassemblingfortransport
For easy transportation the motor and the guide tube can be removed.
6.1 Removingtheguidetube
Caution!Injurytotheoperatororotherpersonscouldoccurordamagecouldoccurifthemachine
startsupunintentionally.Disconnectthemachinefromthepowersupplybeforeworking
onthemachine!
Instructions:
1. Fold down the cable arm (3).
2. Move the main lifting lever (2) to the front position in order to lower the sanding drum to the
 oor. This removes the load from the control rod (5).
3. Loosen both of the wing screws a little (4). Push the handle down to detach the control rod
(5) from the connector (8).
4. Open the guide tube support (7) with the clamping lever (6) and pull the guide tube (1) out.

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6.2 Removingthemotor
Instructions
1. Make sure that the motor switch is
in the o󰀨 position and that the
mains cable is disconnected from
the motor plug.
3. Lift belt tensioner (2) until locating
pin (3) snaps.
4. Remove the belt (1).
6. Remove the knurled nut from the
motor bracket.
7. Now you can remove the motor.
Caution!Injurytotheoperatororotherpersonscouldoccurordamagecouldoccurifthemachine
startsupunintentionally.Disconnectthemachinefromthepowersupplybeforeworking
onthemachine!

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7 OperatingtheCOBRACLASSIC
7.1 Protectiveclothingandequipment
Caution!Weareardefenders!Thelevelsofnoisegeneratedaredamagingtothehearing.
Whileoperatingthetool,youmustweareardefenders.
Usethecapsuleeardefenderswhicharesuppliedasanaccessory.
Hand/armvibration
The following vibration levels have been measured, in accordance with EN 60745:
Vibrationemissionsvalue: ah/DS < 2,5 m/s2
Measuringinaccuracy: K = 1,5 m/s2
For the parquet sanding machine COBRA CLASSIC the following sound level values were obtained
determined according to DIN 45645:
No-load operation LEQ = 84 dB (A)
Operating mode LEQ = 87 dB (A)
Caution!Weararespirator!
WhenusingtheparquetoorsanderCOBRACLASSICandwhendisposingofthesanding
dust,alwaysweararespirator(seechapter7.3and7.4).Weartherespiratorwhichis
suppliedwiththeaccessories.
Caution!Wearsafetygoggles!
WhenusingtheparquetoorsanderCOBRACLASSICandwhenworkingonCOBRA,
alwayswearsafetygogglestoprotectyoureyes.
Caution!Wearproperworkingclothing!
WhenusingtheparquetoorsanderCOBRACLASSICandwhenworkingonCOBRA
CLASSIC,neverwearlooseclothing.Thiscangetcaughtupinmovingparts.
7.2 Fittingthedustbag
Caution!
OnlyuseoriginalWOLFFdustbagsfortheparquetoor
sanderCOBRACLASSIC.Thedustbagmustbermly
ttedtothedustpipebeforesanding.
Instructions:
1. Pull the dust bag over the dust pipe to behind the pipe
reinforcement.
2. Fasten the dust bag here using the Multiclip.

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7.3 Safetyinstructionsregardingdust
 Caution!Ultra-nesandingdust!
 Alwaysweararespiratorwhensandingparquetandplankoors(isincludedwiththe
 accessories).
When the machine is used for its proper purpose, the sanding of wooden  oors naturally
produces dust. The machine has an integrated dust collecting system which blows the dust into
the dust bag. The dust is collected in the dust bag. Even so, this cannot prevent  ne and
ultra- ne dust being produced when using the machine.
 Caution!Healthrisk!
 Wooddust,particularlywhentreatedwithimpregnatingagents,solventsandcoatings,
 cancauseallergicreactions(e.g.oftheskinorrespiratorysystem)afterasensitization
 period.Beechandoakdustisclassiedasbeingcarcinogenic(cancerofthenasal
 mucousmembranes).Dustfromotherkindsofwoodissuspectedofhavinga
 carcinogeniceffect.
 Caution!Firerisk!
 Nosmokingwhilesanding!
 Allignitionsourcesareprohibitedinroomswheresandingworkisbeingcarriedout!
 Airtheroomsthoroughly.
Together with an ignition source and the oxygen in the air, wood dust can cause  res and
explosions.
 Caution!Firerisk!
 Sandingovermetalpartssuchasnailscanproducesparkswhichareblownintothe
 dustbagtogetherwiththewooddust.Heretheglowingmetalchipscanstillcauseare
 evenhourslater.
 Everytimeafterthemachinehasstoppedandattheendofworking,thesandingdust
 containedinthedustbagmustalwaysbedisposedofimmediatelyinare-proof,
 non-ammablecontainer.Thecontainermustbecoveredwithare-proof,
 non-ammablelid.Storethecontaineronlyoutdoors.
7.4 Disposingofsandingdust
 Caution!Firerisk!
 Becauseofthererisk,thesandingdustcontainedinthedustbagmustalwaysbe
 disposedofimmediatelyeverytimeafterthemachinehasstoppedandattheendof
 working.Thesandingdustmustbedisposedofimmediatelyinare-proof,
 non-ammablecontainer.Thecontainermustbecoveredwithare-proof,
 non-ammablelid.Storethecontaineronlyoutdoors.
Caution!
 Atthelatestwhen1/3full,thesandingdustcontainedinthedustbagmustbedisposed
 of,becausethedustcollectingcapacityisreducedwhenthebagisanyfuller.The
 sandingdustmustbedisposedofinare-proof,non-ammablecontainer.Thecontainer
 mustbecoveredwithare-proof,non-ammablelid.Storethecontaineronlyoutdoors.
Caution!
 Alwaysweararespiratorwhendisposingofthesandingdust(includedwiththe
 accessories).

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7.5 Replacingthesandingbelt
Caution!Dangerfrommachinestartingup!
Whenreplacingthesandingbelt,thereisariskfromthemachinestartingup
unintentionally.Alwaysdisconnecttheparquetoorsanderfromthemainspowerbefore
workingatthesandingbelt.
Caution!Riskofcuttingyourhands!
Thesandinggrainsofthesandingbelthavesharpedges.Alwayswearsafetygloves
whenreplacingthesandingbelt.
Instructionsforreplacingthesandingbelt:
1. Switch the machine o󰀨 .
2. Disconnect the machine from the mains
power.
3. Open the sanding drum cover (1).
4. Move the tension lever (2) forward. The
sanding belt which was held under tension
is now released. Pull it out to the side.
5. Insert a new sanding belt.
6. Clamp the new sanding belt by moving the
tension lever (2) backward.
7. Close the sanding drum cover (1).

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7.6 Adjustingthesandingpressure
Use the pressure regulating screw to adjust the required sanding pressure.
Highsandingpressure:
Turn the pressure regulating screw inwards as far as it will go.
Lowsandingpressure:
Turn the pressure regulating screw outwards to the red marking (2) on the screw thread.
7.7 Safetyinstructionsforelectriccableandconnectors
Caution!Mortalriskfromelectricshock!
Thereisamortalriskfromelectricshockifthemachineisusedwhentheelectriccable
orconnectorsaredamaged.Iftheelectriccableandconnectorsaredamaged,theymust
bereplacedbyaqualiedelectrician.
Caution!Mortalriskfromelectricshock!
Runningovertheelectriccablewiththesanderentailsamortalriskfromelectricshock!
Neverpointthemachinetowardsthecable!

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7.8 ConnectingtheCOBRACLASSICtothemainspower
Instructionsforconnectingtomainspower:
1. Make sure that the switch (1) is in the o󰀨 position. The machine must be switched o󰀨 before
connecting up to the mains power.
2. The main lifting lever for the sanding drum (2) must be moved backward so that the sanding
drum is raised from the  oor.
3. Hang the swivelling cable arm (3) into the left or right cable arm bracket as required.
Wind the mains cable through the curl at the end of the cable arm (3) to keep the cable
away from the sanding zone.
4. Connect the coupling (4) of the mains cable to the motor plug, which must be disconnected
from mains power.
5. Connect the plug of the mains cable via a portable RCD (Residual Current Protective
Device) to an adequately fused and earthed 230 V mains socket.
Caution!Neverswitchthemotoronifthesandingbeltisnottightened.
Caution!Neverswitchthemotoronifthesandingdrumisnotraisedfromtheoor.
Caution!Riskofinjuriesfromthemachinestartingupunintentionally!Disconnectthemachinefrom
thepowersupplywhennotinuse,whenchangingthesandingbeltandwhen
7.9 AnmerkungenzumSchleifenvonParkett-undDielenfußböden

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Floorsaresandedinsandingpathswhicharearran-
gedoverlappinglyfromlefttoright.
7.9 Remarksaboutsandingparquetandplankoors
Checktheoortoseeifanyboardsareloose.Thesemustbefastenedbefore
sanding.
Caution!Firerisk!
Iftherearenailsintheoor,theymustbecountersunksoloweverytimebefore
sandingthatthereisnoriskofhittinganailwhilesanding.
Hittinganailwhilesandingcanproducesparksandcancauseare.
Forexampleasparkcancreateareinthedustbag.

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Eachsandingpathcorrespondstoone
forwardandonebackwardmovement.
Thebackwardmovementcoversthesame
pathastheprecedeforwardmovement.

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Becauseofthespaceneededforthepersonoperatingthemachineandthemachineitself,the
oorisnotsandedoveranareaofapproximately1.5mtothewallbehindthesander.
Turnthemachine180°andsandtheremainingareaoftheooralsoinsandingpathswhichare
arrangedoverlappinglyfromlefttoright.Makesurethatthetwoareasareblendedtogether
withoutleavinganymarks.
Note!
Inmostcases,theoorissandedinseveralprocedures.Thewholeoorareaissandeddown

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7.10 SandingwithCOBRACLASSIC
1. Before starting the machine, the main lifting lever for the sanding drum (1) must be in the
rear position. The sanding drum is clearly raised from the oor. The distance to the oor is
approx. 15 mm.
2. Before starting the machine, ensure that the sanding belt is tightened.
3. Bring the machine into the start position.
4. Set the switch to setting „I“. Once the motor has started up, switch to setting „II“.
This gradual start-up procedure avoids high start-up currents.

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5. Before you lower the sanding drum to approx. 5 mm above the oor, you must pull the
gentle lifting lever (2) up by bending the ngers of your right hand and hold in this position.
6. While you hold the gentle lifting lever (2) up, push the main lifting lever (1) forward. This
lowers the sanding drum to approx. 5 mm over the oor. The gentle lifting lever (2) must
always be held up because otherwise the sanding drum will be lowered to the oor.