Sunday, May 26, 2013
Repair parts differ
Repair parts main transmission and differential, requires experience and skill of specialists. The main defects in the repair may be wearing spikes crossing the differential gear teeth, holes in the box differ, necks under the bearings on the shafts, cones and keyways or splines shafts end surfaces poluosevyh gears and satellites, seals, bearings landing sites. Identification and elimination of various defects can be made after partial or complete disassembly of the main transmission and differential. Current maintenance is usually performed when replacing damaged seals and worn bearings. Gear should be replaced with a large wear or breakage of teeth. Getting the correct position of engagement of teeth can be achieved by simultaneously replacing the conjugate gear. Check proper engagement of gears of the main gear is made on paint. With a view to the work surface adjacent teeth of the driven gear can apply a thin layer of paint that is diluted in oil. Then carry through the drive shaft is in one or the other the opposite direction. At the same time on the shaded teeth of driven gear and the places of contact with the teeth of pinion gear begins to appear friendly sites, or the contact patch. Location of the contact with the wide part of the tooth indicates that it is necessary to move up driven gear to the lead. And if the side clearance between the teeth to be very small, it is necessary to move the pinion gear. In the case of the location of the contact patch in a narrow part of the tooth to move the driven gear from the master. If the repair seen a big backlash, then we can move up pinion gear. When marking the contact spot at the tip of the tooth must move up to a pinion gear driven. Small size of the backlash can be increased by pushing the driven gear. If the contact spot marked at the base of the tooth, then you need to move the pinion gear from the driven, but with too large size of the gap can move up driven gear. Proper engagement of gear teeth displays the default location of the contact spot, exactly in the middle edge of the tooth along the entire length. Eliminating axial clearance in the bearings in the repair of the main transmission and differential, and adjustable engagement of gears can be done in different ways. Axial gap bearings pinion shaft can be adjusted by changing the number of pads. The total thickness of the strips are usually chosen so as to prevent axial movement of the shaft, and its turn-by-flange could be a little effort. Adjusting the axial clearance bearing boxes differ, the intermediate shaft can also be made with gaskets. When carrying out adjustment of engagement of gears driven bevel gear is moved in relation to the rearrangement of the leading pads and leads with respect to the slave can be adjusted by changing the number of shims under the bearing frame shaft leading bevel gear. Valid values ??backlash, conical teeth located between the pair of the new main gear should not exceed 0,24-0,48 mm.
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