ENGINE AR-CORE 4478250 - Caterpillar

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Install sleeve bearing (18) , spider gear (17) , and washer (16) on spider (19) . Coat all components with SAE 30W gear oil during assembly.
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Install spider assembly (15) in differential case (2) .
Place bevel gear (14) on spider assembly (15) .
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Install Tooling (B) and a suitable lifting device on the differential housing, as shown. The weight of the assembly is approximately 68 kg (150 lb).
Place the assembly on differential housing (2) , as shown. Make sure that you align the scribe marks on the housing when you assemble the two sections of the housing.
Install bolts (13) in differential housing (2) . Tighten bolts (13) to a torque of 300 40 N m (220 30 lb ft).
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Turn over the differential assembly in order to position the assembly, as shown.
Install splined bevel gear (12) .
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Inspect the clutch pack for the locking differential. Refer to Specifications, "Differential".Note: Before inspection, all discs should be thoroughly cleaned in cleaning fluid. Allow the discs to air dry. Do not reuse any discs with the following conditions: signs of overheating, missing friction material, oil grooves less than 0.25 mm (0.010 inch) and excessive spline wear.
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Install discs (11) in differential case (2) . Begin with the one thick disc that has no teeth. Install one of the thin discs with external teeth. Install one of the friction discs with internal teeth. Install the remaining discs and the remaining friction discs in alternating order until the proper number of discs are installed.Note: Thoroughly coat all discs with SAE 30W gear oil during assembly.
Personal injury can result from being struck by parts propelled by a released spring force.Make sure to wear all necessary protective equipment.Follow the recommended procedure and use all recommended tooling to release the spring force.
Install springs (10) in differential case (2) .
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Install thrust washer (9) on cover assembly (4) . Apply Tooling (E) to differential case (2) that will be in contact with thrust washer (24) . Apply Tooling (E) to the threads and the screw head of flat head screws (23) in order to bond the screw heads to thrust washer (24) . Tighten flat head screws (23) to a torque of 12 3 N m (9 2 lb ft). Torque the screws in a pattern of opposing sides.
Install cover (4) on thrust ring (7) .
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Install plate (6) on cover assembly (4) .
Install flat head screws (5) in thrust ring (7) . Tighten flat head screws (5) to a torque of 28 7 N m (20 5 lb ft).
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Position cover assembly (4) on differential case (2) . Align the tabs on plate (6) with the slots in differential case (2) . Make sure that the scribe mark on cover assembly (4) aligns with the scribe mark on differential case (2) .
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Apply Tooling (F) to the threads of bolts (3) . Install bolts (3) in differential case (2) . Tighten bolts (3) to a torque of 120