TRANSMISSION AR 6Y6844 - Caterpillar

Removal Procedure
Table 1
Required Tools
Tool Part Number Part Description Qty
A 279-3473 Engine Turning Tool 1
329-3831(1) Air Power Turning Tool 1
B 274-5875(2) Guide 2
418-1340(3) Guide 2
339-6503 Bolt 2
C 8T-2686 Puller Group 1
D 328-5926 Spacer 1
E 322-3564 Cylinder Puller 1
(1) Optional
(2) Use for engine serial numbers 1-999 (type 1)
(3) Use for engine serial numbers 1000-99999 (type 2)Start By:
Remove the cylinder head. Refer to Disassembly and Assembly, "Cylinder Head - Remove".
Remove the piston cooling jet. Refer to Disassembly and Assembly, "Piston Cooling Jet - Remove and Install".
Care must be taken to ensure that fluids are contained during performance of inspection, maintenance, testing, adjusting, and repair of the product. Be prepared to collect the fluid with suitable containers before opening any compartment or disassembling any component containing fluids.Refer to Special Publication, NENG2500, "Dealer Service Tool Catalog" for tools and supplies suitable to collect and contain fluids on Cat products.Dispose of all fluids according to local regulations and mandates.
Drain the engine oil into a suitable container for storage or for disposal. Refer to Operation and Maintenance Manual, "Engine Oil and Filter - Change".
Illustration 1 g03405954Note: Inspect the connecting rod and connecting rod cap for the proper identification mark. The connecting rod and the connecting rod cap should have an etched number on the side. The number should match the cylinder number. Mark the connecting rod and the connecting rod cap, if necessary. Careful handling is required for fractured connecting rods. The connecting rod and the rod cap should be placed on the sides in order to prevent damage. When possible, the connecting rod and the rod cap should be bolted together in order to prevent damage.
Use Tooling (A) to rotate the flywheel in order to access the connecting rod cap that will be removed.
Remove bolts (1), spacers (2), and connecting rod cap (3). Position the crankshaft so that the piston is at the bottom dead center. Inspect the connecting rod bearing for wear or for damage.
Illustration 2 g01240845
Install Tooling (B) onto the connecting rod.
Illustration 3 g01240763
Install Tooling (C). Hold the bolt of Tooling (C) and turn the nut. Turn the nut until the nut is tight.
Rotate the engine in order to position the cylinder pack to the proper height and install Tooling (D).
Illustration 4 g01997933
Install Tooling (D). Remove Tooling (C). Note: Do not remove the cylinder pack with Tooling (C).
Illustration 5 g01765495
Install Tooling (E) onto the piston liner. Rotate the engine in order to position the piston to the top. Attach Tooling (E) to the piston. Attach a suitable lifting device onto Tooling (E). The weight of the piston, the liner, and the connecting rod is approximately 50 kg (110 lb). Remove Tooling (D).
Illustration 6 g03405978
Remove cylinder pack (4) from the cylinder block.