米切尔手动变速器差速器调整讲课文档.pptVIP

第一页，共二十六页。 优选米切尔手动变速器差速器调整 * 第二页，共二十六页。 Carrier Adjustments Carriers require four major adjustments during assembly: 1. Pinion bearing preload 2. Pinion depth 3. Carrier bearing preload 4. Backlash 第三页，共二十六页。 Pinion Gear Adjustments Pinion Preload Shims Collapsible Spacer Pinion Depth Shim Shim Most pinion preload adjustments are made using a collapsible spacer; some use selective shims. Most pinion depth shims are between the gear head and the bearing; some fit between the bearing cup and the carrier. 第四页，共二十六页。 Crush Sleeve The collapsible spacer, commonly called a crush sleeve, fits between the upper bearing and the lower bearing or gear. Tightening the pinion shaft nut collapses the sleeve and increases the preload on the bearings. A new crush sleeve is used when the pinion gear is installed. Nut Crush Sleeve 第五页，共二十六页。 Checking Preload The amount of torque required to rotate the pinion gear is being measured using a low-reading torque wrench. If the amount is too low, the pinion nut will be tightened further to put more preload on the bearings. Low-reading Torque Wrench 第六页，共二十六页。 Shim Adjustment A group of shims are placed between a step on the pinion shaft and the bearings. Thinner shims will increase the amount of bearing preload. Pinion Gear Pinion Preload Shims 第七页，共二十六页。 Replacing Differential The differential and ring gear with the carrier bearings has been placed into the carrier with the ring gear contacting the pinion gear. An adjusting shim is being inserted between the left bearing cup and the housing. Shim Carrier Differential Case 第八页，共二十六页。 Carrier Bearing Preload A shim is being inserted between the right side bearing cup and the housing. The thickness of this (right side) shim and the left side shim will determine carrier bearing preload and back lash. Carrier bearing preload occurs when the shims are thicker than the space. Shim 第九页，共二十六页。 Checking Back Lash The dial indicator is set up using a flexible mount. The meas