623F Wheel Tractor-Scraper 3406C Engine Supplement Caterpillar

Removal Procedure

Start By:

1. Remove the crankcase guard. Refer to Disassembly and Assembly, "Crankcase Guard - Remove and Install" .

1. Put identification marks on all lines, hoses, wires, and tubes for installation purposes. Plug all lines, hoses and tubes. This helps prevent fluid loss and contamination of the oil system.

2. Drain the engine oil in a suitable container for disposal. The capacity of the engine crankcase is 36 L (9.5 US gal) .

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Illustration 1	g00489644

3. Inspect the oil drain adapter for leaks around the gasket. If necessary, remove two bolts (1) and the washers that secure gasket (2) between the adapter and the oil pan. Replace the gasket. Reinstall the adapter, the two bolts, and the washers.

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Illustration 2	g00489267

4. Loosen retaining nut (3) . Disconnect oil hose (4) from oil pan (5) . Remove bolt (6) and the washer that secures wiring bracket (7) to the oil pan. Move the wires and the hose aside.

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Illustration 3	g00489407

5. Loosen retaining nut (8) . Disconnect hydraulic hose (9) from the screen assembly.

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Illustration 4	g00489422

6. Remove two bolts (10) and the washers that secure bracket (11) to the transmission oil cooler. Remove two bolts (12) and the washers that secure bracket (11) to the oil pan. Remove the bracket. To prevent seepage, reinstall two bolts (10) to the transmission oil cooler.

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Illustration 5	g00489427

7. Remove two bolts (13) that secure bracket (14) to the oil pan. Remove bolt (15) that secures bracket (14) to the transmission oil cooler. Remove the bracket. To prevent seepage, reinstall bolt (15) to the transmission oil cooler.

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Illustration 6	g00489432

8. Place Tooling (A) under oil pan (5) .

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Illustration 7	g00489434
Tooling (A) has been removed for photographic purposes.

9. Remove 37 bolts (16) that secure oil pan (5) to the engine block.

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Illustration 8	g00489438

10. Lower Tooling (A) . Remove gasket (17) and the oil pan from the machine.

Installation Procedure

1. Clean all parts and inspect all parts. If any parts are worn or damaged, use new Caterpillar parts for replacement.

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Illustration 9	g00489438

2. Inspect gasket (17) for the oil pan. If necessary, replace the gasket. Position the oil pan under the machine. Raise Tooling (A) .

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Illustration 10	g00489434
Tooling (A) has been removed for photographic purposes.

3. Install 37 bolts (16) that secure oil pan (5) to the engine block.

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Illustration 11	g00489427

4. Before installing bracket (14) , remove bolt (15) from the transmission cooler. Position the bracket on the transmission oil cooler and the oil pan. Install bolt (15) and two bolts (13) that secure the bracket to the transmission oil cooler and the oil pan.

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Illustration 12	g00489422

5. Before installing bracket (11) , remove two bolts (10) from the transmission cooler. Position the bracket on the transmission oil cooler and the oil pan. Install two bolts (12) and two bolts (10) that secure the bracket to the oil pan and the transmission oil cooler.

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Illustration 13	g00489407

6. Connect hydraulic hose (9) to the screen assembly. Tighten retaining nut (8) .

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Illustration 14	g00489267

7. Place wires in the wiring bracket. Install bolt (6) and the washer that secures wiring bracket (7) to the oil pan. Connect oil hose (4) to oil pan (5) . Tighten retaining nut (3) .

8. Fill the oil pan with the appropriate oil. Refer to Operation and Maintenance Manual, SEBU7143 for information on filling the engine crankcase.

End By: Install the crankcase guard. Refer to Disassembly and Assembly, "Crankcase Guard - Remove and Install".