Technical Notes
Alignment Equipment - Complete SystemsNOTES, REQUIREMENTS, INFORMATION, ETC.
All measured components are on the vehicle. The measurement is carried out using the Geometrical Drive Axis as reference, eliminating the requirement for placing and retaining vehicle in an "optical square". Minimal space requirement in width (scissors type rack - 3200mm, 4-post type rack - 4000mm. However, additional length is required to accommodate the display console, which is placed in front of the vehicle (particularly important for devices with drawer-type control panel) and the approach ramps. Caster is measured electronically. Measurements are according to Geometric Drive Axis using position of rear wheels as reference. Only one power cable. Printer (to produce the MB test sheet) provides documentation on results. Monitors with operators guidance and help features. Specifications are stored for specification/actual reading comparisons. The hose-type liquid-level or manometer used for checking height level deviation of the rack surfaces is no longer adequate for the stricter accuracy requirements of MKS needed today. A transit must be used for new installations by the equipment manufacturer. For any adjustments and/or annual calibration, a transit must similarly be used.
QUALITY ASSURANCE AND UTILITY VALUE RETENTION: Wheel alignment requires the careful handling of equipment, tools, components and instruments. In the alignment bay, it should be possible to position the vehicle properly without difficult maneuvering. The bay should not be located close to main workshop thoroughfares (if possible in a quiet corner of the workshop). The required MB Special Tools should be permanently stored in a safe organized and tidy manner. Measurement sensors cables should be anchored to the rack (available accessories). The number of people working here should be limited and personal responsibilities for work space and equipment maintenance should be established. "Non-alignment work" e.g. general service/maintenance should only be performed here in exceptional cases. In such cases, the electronic turnplates and rear slip plates should be removed or covered to prevent soiling and contamination. The tire contact patches must be horizontally and vertically even. NOTE: that a height deviation of a little as 1 mm with a track width of 1,500mm corresponds to a maximum camber error of 2.3 minutes. When the rack is properly installed by the manufacturer using a transit, any variations occurring later can be identified by the operator to be due to either the alignment console (and sensors) or the rack with the aide of MKS This is done by inserting the alignment heads (measuring sensors) into the precision bores (fit dia. 15 F6) of the MKS brackets located at the sides of the runways with rack in the lowered position, aligning them horizontally and fixing them in places. A vehicle should be on the rack (to provide load) and the front Turn Plates and rear Slip Plates should be released. If reference value variations > 5' are found, then the cause (alignment heads/sensors or rack) can be ascertained (e. g. using the calibration bar included with the alignment console package) and deviating alignment heads/sensors can be adjusted by the user (with on-screen instructions). If there is no deviation in the alignment heads/sensors, the adjustment of the rack must be checked by the manufacturer. See Quality Assurance Alignment Lift-Rack Section for additional information Approved Alignment Consoles have a special software program for determining the reference value variation. With this instrumentation, the camber and track values (of the runways) are determined using the alignment heads/sensors mounted in the MKS brackets. This procedure can only be used after the initial physical leveling of the rack and "marrying" the rack electronically to the alignment console; which results in an electronically stored set of reference values ("zero values"). Approved Alignment Consoles with 8-sensor systems feature a permanent self-test of track measurement accuracy (camber indirectly only). However, both the 6-sensor systems as well as the 8-sensor systems can both be checked by MKS and/or calibration kit. ACCESSORIES (general): Specific MB Special Tools are required for vehicle alignment. An additional group of MB Special Tools are needed for accident measurement (K-points). Tools should be organized and stored in the alignment bay mounted on tool boards.
MB Quick Clamps: All MB approved wheels have bores to accommodate the mounting of Quick Clamps. By using Quick Clamps, the need to perform compensation is eliminated. Further there is no risk of damage to the light-alloy rims.
RECOMMANDATIONS FOR THE ALIGNMENT BAY LAYOUT:
Contact the MBUSA Facility Planning Department for specific installation recommendations
Clearance Recommendations: A = 1550 mm B = 1000mm
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