MAINTENANCE MANUAL - Meritor

IntroductionMeritor’s model MS-113 and MS-113 Plus single-reductionrear axle have a single-reductiondifferential, which is front-mounted into the axlehousing. Figure 1.1. The differential has a hypoiddrive pinion and ring gear set. Bevel gearsare used in the differential assembly. All bearingsin the differential are tapered roller bearings.When the differential operates, there is normaldifferential action between the wheels all thetime.WARNINGTo prevent serious eye injury, always wearsafe eye protection when you perform vehiclemaintenance or service.Park the vehicle on a level surface. Block thewheels to prevent the vehicle from moving.Support the vehicle with safety stands. Do notwork under a vehicle supported only by jacks.Jacks can slip and fall over. Serious personalinjury and damage to components can result.Use a brass or leather mallet for assembly anddisassembly procedures. Do not hit steel partswith a steel hammer. Pieces of a part can breakoff and cause serious personal injury.1 - ADJUSTING RING2 - DIFFERENTIAL3 - RING GEAR AND DRIVE PINION4 - TAPERED ROLLER BEARING5 - TAPERED ROLLER BEARING6 - HOUSING7 - SIDE GEAR8 - COTTER PINFigure 1.1RemovalAxle Shafts from the Axle Assembly1. Park the vehicle on a level surface. Block thewheels to prevent the vehicle from moving.2. Raise the rear end of the vehicle so that therear wheels are off the ground. Support thevehicle with safety stands. Figure 2.1.3. Place a drain pan under the rear axle.4. Remove the drain plug from the bottom of theaxle housing. Drain the lubricant from the assembly.Install the drain plug and tighten it to35 lbs.ft minimum.5. Disconnect the driveline universal joint fromthe pinion input Fork on the differential. Figure2.2.1 - SAFETY STANDSFigure 2.16 MAINTENANCE MANUAL