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1. 3 in 1 Digital Compression Tester order no 10034098 Comprises Digital compression tester in protective rubber casing 20 bar max with quick release connection for fitting adapter hose to the spark plug thread incl 9V battery battery compartment on back of tester 3 adapter hoses for 10 12 14mm spark plug threads 3 O rings 1 valve incl valve core remover as spares Display Continuous display of unit of measurement 1 Shows the selected unit of measurement bar psi or kPa This momentary setting is retained when the device is switched on and off Continuous pressure display 2 Shows the maximum pressure reached in the indicated cylinder until the pressure relief button 7 is pressed Display of cylinder number 3 Shows the number of the cylinder for which the momen tary and maximum pressures are displayed The num ber changes when the ZYLINDER CYLINDER button is pressed Maximum pressure display 4 Shows the maximum pressure in the indicated cylinder This figure is saved until the LOSCHEN CLEAR button 8 is pressed Buttons AN EINHEIT AUS ON UNIT OFF button 5 Press this button to switch the compression tester on Press it again to change the unit of measurement Press the button for 3 seconds to switch the compressi on tester off The compression tester switches itself off automatically if it is not used for six minutes The com pression measurements are retained when
2. number 0049 0 40 734 195 58 resp by email technikcenter louis eu before using the article for the first time if you have any questions on the product and or these instructions We will be happy to provide you with quick help In this way together we guarantee that the product is correctly assembled and used without any problems Detlev Louis Motorradvertriebs GmbH 21027 Hamburg Germany www louis eu E Mail technikcenter louis eu As at 01 12 GB_10034098 indd 2 16 01 12 18 35 Operating instructions 16 17 18 19 20 3 in 1 Digital Compression Tester order no 10034098 from Cylinder 1 Fit the adapter in Cylinder 2 and attach the com pression tester Press the ZYLINDER CYLINDER button 6 to change the cylinder number on the display from 1 to 2 Repeat the compression test on Cylinder 2 and all the remaining cylinders Ensure that the cylinder number on the compression tester changes each time you move on to the next cylinder When you have tested all the cylinders look at the readings for each individual cylinder by pressing the ZYLINDER CYLINDER button 6 If individual measurements are too low or inconsistent carry out the wet compression test see below nozzles on many later vehicle models are activated by the ignition switch in starting mode This could cause a fire hazard or contamination of the engine oil with fuel It is essential to obtain precise information from y
3. spark eventually get into the engine oil To prevent this plugs can be screwed out from happening it is advisable to interrupt the 5 Wear protective goggles Use compressed air to power supply to the injection system if the engine carefully remove any dirt around the spark plugs has to turn for a prolonged periods without ignition Wear gloves for protection against burns on the hot e g when testing numerous cylinders in succes engine sion Vehicle service workshops use special 6 Pull off the spark plug connectors do not pull on the auxiliary start switches in the starting circuit so ignition cable and remove the spark plugs one by that the starter can be operated while circumventing one Mark each spark plug with the number of the the ignition and electronic fuel injection It is essen cylinder and then place it on a clean flat surface tial to obtain precise information from your autho this will help with finding any defective cylinders rised dealer before working on a vehicle with because the appearance of the plugs can be com electronic fuel injection to avoid problems error pared with the compression reading for a particular messages from the vehicle electronics etc cylinder 14 Press the pressure relief button 7 to depressurise NOTE If the engine has two plugs per cylinder only the compression tester one needs to be removed 15 Disconnect the display unit and remove the adapter Please contact our technics centre via the fax
4. damaged Safety instructions Always wear protective goggles when carrying out a compression test The expected combustion pressure must not exceed the maximum rating of the compression tester which is 2Obar or 300psi or 2000 kPa Always put the vehicle into neutral before carrying out the test Ensure that all connections are secure before carrying out the test Take precautions to prevent contact with hot engine parts Before cranking the engine ensure that the ignition is disconnected from the electric circuit For fuel injected engines it is advisable to disconnect the injection system from the vehicle s electrical system or to use an auxiliary starting switch see above The injection Please contact our technics centre via the fax number 0049 0 40 734 195 58 resp by email technikcenter louis eu before using the article for the first time if you have any questions on the product and or these instructions We will be happy to provide you with quick help In this way together we guarantee that the product is correctly assembled and used without any problems Detlev Louis Motorradvertriebs GmbH 21027 Hamburg Germany www louis eu E Mail technikcenter louis eu As at 01 12 GB_10034098 indd 3 16 01 12 18 35
5. e adapter s O ring sits firmly wear incorrect valve adjustment a defective cylinder 11 Switch on the compression tester by pressing the head gasket or a worn cylinder head Engine wear can AN AUS ON OFF button 5 affect pistons and cylinders or valves and valve seats 12 Press the ZYLINDER CYLINDER button 6 for at If the combustion pressure is too high this indicates least three seconds to clear the memory and reset major carbon build up in the engine The Rothewald the cylinder display to CYL 1 compression tester enables you to carry out two tests 13 Observe the test display and at the same time the dry and the wet compression test crank the engine using the starter button or kick starter for approx 10 compression strokes or just The dry test procedure long enough that the pressure no longer rises the 1 Refer to the owner s manual for the compression peak pressure is automatically saved specifications of the engine Important In vehicles with electronic fuel injection 2 Start the engine and wait until it reaches normal the petrol air mixture still reaches the cylinders operating temperature then switch off the engine when the ignition no longer has a power supply 3 Always put the vehicle into neutral before carrying out If the engine is cranked for too long without igniti the test on petrol may accumulate on the pistons and will 4 Make the cylinder head accessible so that the
6. or example disconnect the power button 8 while the relevant cylinder and its pressure supply to the ignition coils Dangerous high and low measurements are displayed If the LOSCHEN CLEAR voltages occur in ignition systems Always switch off button 8 is pressed for 3 seconds at any time the the ignition or disconnect the battery before carrying pressure measurements for all the cylinders will be out any work deleted from the memory and the display returns to 8 Remove the air filter and secure the throttle valves Cylinder 1 in the fully open position or open the carburettor valve fully full throttle position Carrying out a compression test NOTE Never place anything in the throttle body as An internal combustion engine in good operating this could cause internal engine damage condition creates a specific pressure in each cylinder 9 Use the starter to turn the cam shaft over briefly with Normally the pressure should not vary by more the plug threads open in order to eject any loose than 10 between cylinders or from the engine contaminants from the cylinders manufacturer s guide figure The larger the variance 10 Select the correct adapter for the thread depen between cylinders or from the manufacturer s recom ding on the particular spark plug and screw the mended pressure the lower the compression the adapter hand tight into the plug hole of Cylinder 1 greater the likelihood that this indicates serious engine until th
7. our authorised dealer before working on a vehicle with electronic fuel injection to avoid problems error messages from the vehicle electronics etc Since this compression tester is a universal device and not intended just for one particular vehicle it is impor tant to make sure that it is suitable for your type of vehicle before you use it for the first time Always follow the instructions in your vehicle owner s manual and the directions of the vehicle manufacturer This is essential as improper use of this product or its unsuitability for a vehicle could impair the safety and or 21 On completion of the compression test refit the condition of the vehicle spark plugs and connectors and return all other components to their normal position The wet test procedure The wet compression method ensures that the test is not influenced by the piston rings pistons or cylinders But it is only recommended for vehicles that are not fitted with a catalytic converter On completion of the dry compression test put approx half a teaspoon of engine oil into each of the plug holes Then repeat the com pression test as described above If the readings from the wet test are significantly higher there is a pressure loss at the piston rings which means worn pistons cylinders piston rings or damaged piston rings If the readings from the dry and wet tests are approximately the same but too low the valves and or valve seats may be
8. the tester is switched on and off Cylinder Forwards button 6 Press this button to move on to the next cylinder num ber The momentary and stored maximum pressure measurements for the last cylinder measured continue to be displayed until the pressure in the hose assembly is zeroed by pressing the pressure relief button or by disconnecting the hose at the quick release connection Pressure relief button 7 Press this button to release the remaining pressure in the hose unit of the compression tester The momentary pressure reading returns to zero but the maximum pres Please contact our technics centre via the fax number 0049 0 40 734 195 58 resp by email technikcenter louis eu before using the article for the first time sure is saved electronically until the LOSCHEN CLEAR button is pressed Functional overview The Rothewald Compression Tester can be used for wet and or dry compression testing in order to determine the pressure created in the cylinders of a petrol engine The unit can measure display and save pressures of up to 300psi 20 bar 2 000kPa for up to 12 cylinders In the compression test the momentary peak pressure is displayed in large numbers in the centre of the liquid crystal display This reading is automatically saved and appears in small figures at the bottom right of the display If the pressure relief button 7 is pressed the momentary measurement on the display is zeroed but the peak
9. value is saved and still appears at the bottom right of the display Repeat tests can be performed on the same cylinder and the new momentary peak value will be displayed in large numbers again This new maximum value is only saved if it is higher than the maximum value from the previous test or if the LOSCHEN CLEAR button 8 is pressed in order to delete the old maximum value from the memory Pressure measurements for up to 12 cylinders can be saved Each reading is shown on the display together if you have any questions on the product and or these instructions We will be happy to provide you with quick help In this way together we guarantee that the product is correctly assembled and used without any problems Detlev Louis Motorradvertriebs GmbH 21027 Hamburg Germany www louis eu E Mail technikcenter louis eu As at 01 12 GB_10034098 indd 1 16 01 12 18 35 3 in 1 Digital Compression Tester order no 10034098 with the corresponding cylinder number The peak values 7 To prevent any risk of explosion caused by ignition can be compared by pressing the ZYLINDER CYLINDER sparks and to avoid damage to the electronic igniti button 6 either during testing or after all the cylinders on system the primary low voltage circuit of the have been tested Individual readings can be deleted ignition system must always be disconnected throug from the memory by pressing the LOSCHEN DELETE hout the test F

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