PLATE-ISOLATION 9T3338 - Caterpillar

This group combines coverage of the removal and installation of Piston, Rings, Connecting Rod, Cylinder Liners, Main Bearings and Crankshaft. It is divided into three sections:First: tool usage in the operation of crankshaft removal, both the engine tilting method and engine lifting method. Keep in mind that caution should be used in either method used, because of the great weight being handled. Depending on components remaining on the engine block, approximate minimum weights are: Second: Cylinder Liners, Piston, Rings and Connecting Rod Disassembly and Assembly.Third: Crankshaft and Main Bearings Disassembly and Assembly.Engine Tilting Method Of Crankshaft Removal
Tools required for engine tilting method of removing crankshaft:
Never use the engine tilting group unless the engine base is securely fastened to its foundation.
The procedure described is for removing the crankshaft where there is a minimum of overhead and side clearance.1. Always position 5B1181 Turnbuckles (5) so the left-handed threads are toward the top of the engine. 2. Mount FT731 left and FT735 right Support Beams (10) and FT734 Supports (11) on the respective sides of the engine. D398 and D379 Engines use FT113A and FT113 Support Beams.3. Install 8F4239 Blocks (2) and 8F4226 Yokes (9) on Support Beams (10) and thread 8F4230 Studs (8) [14.5 in. (368,3 mm) long] into 8F4226 Yokes (9). Use jam nuts on studs as shown. If the engine is installed with vibration isolation dampers, place wooden blocks on both sides of each damper. This will prevent excessive load on the damper when the engine weight is shifted in the tilting operation.4. Thread 5B1181 Turnbuckles (5) onto studs (8).5. Thread 8F4231 Studs (4) [9 in. (228,6 mm) long] into the turnbuckles.
The turnbuckles and studs must carry the load evenly and must be operated evenly or they will bind. If any one turnbuckle is excessively hard to turn, correct the binding before proceeding. Forcing may cause damage to threads.
TOOL ARRANGEMENT TO TILT BLOCK FROM BASE (D399 Engine illustrated)
1. FT736 Bracket. 2. 8F4239 Block. 3. 8F4226 Yokes. 4. 8F4231 Stud. 5. 5B1181 Turnbuckle. 6. 8F4228 Hinge yoke. 7. 8F4225 Bolts. 8. 8F4230 Stud. 9. 8F4226 Yoke. 10. FT731 and FT735 Support beams (left and right). 11. FT734 Support beam. 12. Bolts. 13. Steel plate.6. Thread the top of 8F4231 Studs into 8F4226 Yokes (3) and attach 8F4239 Yoke, block (2) and FT736 Bracket (1) to the cylinder head.7. Install 8F4225 Bolts (7), (six for D399 and D398 Engines and four for D379 Engines) in place of the bolts used to secure the block to the engine base.Be sure to place blocking with a steel plate (13) under the 1A8628 Bolts (12) in all support brackets (11).8. Raise the engine four inches (101,6 mm) with the turnbuckles so 8F4228 Hinge Yoke (6) and 8F4233 Hinge Block can be installed.
The engine must be kept level while it is being raised. If an excessive amount of effort is required to turn one turnbuckle, or hinge block and hinge yoke mounting holes do not line up, check the opening around the engine base