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ToC GENERAL SERVICE MANUAL MARINE ENGINES H 3 Testing of torque wrenches The torque wrenches are subject to regular tests of the set values. By doing so, the tripping value of signalling torque wrenches and the scale accuracy of measuring torque wrenches are tested. H 4 Non-destructive material testing For the detection of surface cracks, the non-destructive test according to colour penetration test procedure is recommended. The workpiece is sprayed or coated with a penetration agent, and after drying a developer is applied. After a development time of appr. 10 minutes, defects on the workpiece appear as dots or lines. H 5 Use of adhesive and sealing materials In the workshop manual adhesive and sealing materials are specified for the repair of engines and aggregates, which are used at operating temperatures of up to 150° C and agents such as water, coolants and hydraulic fluids, engine and gear oils as well as fuels. Solvent-free sealing materials The hardening takes places without loss of volume, so that a retightening of screw connections is not necessary. Anaerobic sealing materials These are used for securing, fixing and sealing, and only harden under exclusion of air. Solvent containing sealing materials Due to their contents of volatile parts a loss of volume occurs during hardening. During repair, the hardening time is taken into consideration. If such sealing materials are used, special reference is made in the description of the workshop manual. H 6 Solvent-free sealing materials Silicon sealing materials They consist of silicon and filling materials and are free of solvents. The product is applied to the cleaned sealing surface from the tube or cartridge in form of a string. Sealing material residues are removed with cleaning agent. Silicon sealing material is to be stored below 30° C. Anaerobic sealing materials They consist of a single component epoxy in liquid form. The product is applied as a liquid to the components and remains liquid, as long as it is in contact with ambient air (oxygen). Only when the parts are assembled, chemical reaction starts due to exclusion of air (oxygen) and metal contact, i.e. transformation of liquid state into an epoxy built up by molecular chains. Any residues remaining after assembly and/or are pressed out of the connection remain liquid and may be removed easily. Page GENERAL-50 Z001019/0_8_Octobre 2011
ToC SERVICE MANUAL MARINE ENGINES GENERAL General guidelines of application for the of use of anaerobic sealing materials Cleanliness of components Non-metallic surface protection must be removed. In case of repair, soiled and oily components are to be cleaned and residues of adhesive plastic material are to be removed. Thread bores are recut with the appropriate thread bore and blown out with compressed air. If solvents or degreasing agents are used for cleaning, take care that they are completely volatilized before application of the epoxyl. Storage At temperatures below 28° C, 1 year minimum. Guidelines of application for securing (S) Designation: SM ....... Securing medium tight (the connection is to be loosened without problems) Designation: SF ........Securing tight (the connection is difficult to loosen) Application: Screw connections Fixing procedure In general, the application of the epoxy to the screw thread is sufficient. If screws are screwed into socket threads, only the thread bore is wet in order to let the air escape during screwing in. Screws or nuts which are tightened with a specified torque, are slightly oiled on their support surface or housing part. Guidelines for fixing (B) Designation: BM ....... Fixing medium tight Designation: BF ........ Fixing tight Application: Jointing connections, bushings, sprockets, belt pulleys, bearings etc. Jointing procedure In case of jointing connections both jointing parts are to be wetted. The wetting has to completely cover the jointing surfaces. The parts are shifted into each other by turning, in case of slide fits. No strength may be exerted to the connection until sturdiness is reached (for time, refer to Table 1). Guidelines of application for sealing (D) Designation: DR ....... Sealing of pipe connections Designation: DF ........Sealing of plane surfaces Application: Sealing of threads , screw connections, jointing connections and plane surfaces. Hardening time Use S ecuring Fixing (B) Sealing Class SM SF BF DR DF DF Product Loctite 243 Loctite 262 Loctite 620 Loctite 509 Loctite 510 Loctite 5900 Handtightnes s reached after Functional tightness reached after F inal tightnes s reached after Z001019/0_8_Octobre 2011 15 - 30 min 15 - 30 min 5 - 10 min 15 - 30 min immediately immediately 1 h 1 h 1 h 0.5 h immediately immediately 3 h 3 h 4 h 12 - 24 h 24 h 12 - 24 h Page GENERAL-51
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STEYR MARINE ENGINES 4 CYLINDERS +
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PREFACE STEYR MOTORS GmbH has devel
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