MAINTENANCE MANUAL - Meritor

Assembly and Installation14. IInstall the capscrews through both differentialcase halves and into the ring gear.Use a CRISSCROSS pattern to tightenthe capscrews like specification below: ForM14 screws, apply toque at an angle of 63+ 4/-0 Lb. foot (85 + 5 /-0 N.m + 60º + 5º /-0º)15. Inspect the differential gears rotating resistance.Use the following procedure.NOTE:• Make sure that the bearing cones are freeof burrs;• Make sure that during the pressing, thehousing material is not being pulled;• Make sure that the cones are completelytouching their respective.CAUTIONHeat the ring gear before seatingit onto the differential case. Donot press a cold ring gear ontothe differential case. A cold ringgear will damage the differentialcase because of the tight fit.1 - capscrewsFigure 4.10Assembly of the Bearing Cones ontoBoth Halves of the Differential Case1. Use a press to install the bearing cones ontoboth halves of the differential caseAssembly of the Bearing Cones onto BothHalves of the Differential Case1. Install the bearing cones onto both halves ofthe differential case using a proper tool and apress. See Figure 4.11.2. Heat the ring gear. A maximum temperatureof 340°F (170°C) can be applied at the gearweb. The temperature at the gear teeth mustnot exceed 250°F (120°C). Wear safe clothingand gloves while working with the hotring gear.3. Position the differential case on a workbenchwith the bearing cone on top.4. Place the ring gear over the differential caseimmediately after the gear is heated.• If the ring gear does not fit easily on the differentialcase: Heat the gear again.5. Align the ring gear and differential casecapscrew holes. Rotate the ring gear as necessary.6. Use a feeler gauge to inspect for gaps betweenthe ring gear and the differential case.• If the gap exceeds 0.001-inch (0.025 mm)atmore than three places with an arc lengthgreater than 1.0-inch (25.4 mm): Inspect thedifferential case and ring gear for wear or damage.Repair or replace parts as necessary.Check the differential case and ring gear forwear or damage. Fix or replace the parts asnecessary.7. Turn the differential case over on the workbenchso that the bearing cone is on thebottom.Figure 4.1124 MAINTENANCE MANUAL