HOSE AS 3631753 - Caterpillar

6. Remove crankshaft main bearing caps No. 2 through No. 6 for the 3412 Marine Engine and bearing caps No. 2 through No. 4 for the 3408 Marine Engine.7. Push the pistons as far away as possible from the crankshaft. 8. Remove bearing (6) from each crankshaft main bearing cap. Make sure that each bearing is kept with the crankshaft main bearing cap it is removed from for correct installation purposes. 9. Remove two thrust plates (7) from the center main bearings. 10. Fasten Tool (B) and a hoist to the crankshaft as shown.11. Remove the No. 1 and No. 7 crankshaft main bearing caps for the 3412 Marine Engine. Remove the crankshaft main bearing caps No. 1 and No. 5 for the 3408 Marine Engine.12. Use Tool (B) and a hoist to remove crankshaft (8) from the cylinder block. The weight of the crankshaft for the 3412 Engine is approximately 181 kg (400 lb). The weight of the crankshaft for the 3408 Engine is approximately 143 kg (315 lb). 13. Use Tool (C) to remove gear (9) from the crankshaft. Use Tool (D) to remove the dowel that is under the gear if a replacement is necessary. 14. Use Tool (E) to remove pin (10) from the crankshaft if a replacement is necessary. 15. Put identification on bearings (11) and (12) as to their location on the cylinder block or connecting rod. Remove bearings (11) and (12).Install Crankshaft
Do not put oil on the bearings until the bearing clearance has been checked.1. Install bearings (1) in the connecting rods they were removed from. Make sure the tab in each bearing is in alignment with the notch in each connecting rod.2. Install bearings (2) in the cylinder block. Make sure the tab in each bearing is in alignment with the notch in the cylinder block. 3. Install pin (3) in the end of the crankshaft. Install the pin so that it extends a maximum of 6.40 mm (.252 in) above the surface. 4. Install the dowel in the crankshaft that puts gear (4) in the correct position. Install the dowel so that it extends 4.10 0.50 mm (.161 .020 in) above the surface.5. Heat gear (4) to a maximum temperature of 233°C (451°F). Gear (4) must be installed on the crankshaft with the "V" timing mark toward the outside.6. Install gear (4) on the crankshaft. Make sure the notch in the gear is in alignment with the dowel on the crankshaft. 7. Fasten Tool (A) and a hoist to the crankshaft (5) as shown. Install the crankshaft in the engine. The weight of a crankshaft for the 3412 Engine is approximately 181 kg (400 lb). The weight of a crankshaft for the 3408 Engine is approximately 143 kg (315 lb). 8. Make sure that "V" mark (6) on the crankshaft is in alignment with "V" mark (7) on the idler gear.9. Install the bearings in the No. 1 and No. 7 crankshaft main bearing caps.