New Cylinder Pack Components Are Now Used on Certain 3508B and 3512B Standard Stroke Machine Engines {1239} Caterpillar

Excavator

5130B (S/N: 4CS1-218)

Off-Highway Truck/Tractor

777D (S/N: AGC1-2547; 3PR1-1126; 2YW1-105; AGY1-80)

785C (S/N: 1HW1-134; APX1-2404)

Track-Type Tractor

D11R (S/N: AAF1-290; 8ZR1-471; 9TR1-473; 9XR1-189; 7PZ1-5050)

Wheel Loader

992G (S/N: 7HR1-387; AZX1-839; ADZ1-623)

Description Of Change: The new cylinder pack components improve engine reliability and durability. The new cylinder liner has an anti-polishing sleeve and upper liner seal with improved thermal properties. The piston has a rectangular steel compression ring and rectangular steel intermediate ring.

Adaptable To:

Show/hide table

Do not operate or work on this product unless you have read and understood the instruction and warnings in the relevant Operation and Maintenance Manuals and relevant service literature. Failure to follow the instructions or heed the warnings could result in injury or death. Proper care is your responsibility.

The following changes are adaptable to the products within the listed serial numbers, and are effective with all products after the listed serial numbers.

These changes are effective with the following engine serial numbers:

• 2GR08292-UP

• 8BR03231-UP

Note: These changes apply only to the machine serial numbers listed above if a 3508B or 3512B standard stroke engine is installed. These changes do not apply to machines with High Displacement (HD) engines .or other 3500 series engines.

The new cylinder pack components are direct replacements for the previous cylinder packs components. If replacement of the previous cylinder packs occurs, the replacement with the new cylinder packs must be done for every cylinder in the engine. The new cylinder packs are not compatible to be run with the previous cylinder packs in the same engine.

Table 1 contains the new and previous part numbers for the cylinder packs.

Table 1

New Part Number	Part Name	Previous Part Number	Qty
20R-6618	Cylinder Pack As	10R-4343	1
448-3651	Piston Ring (Intermediate)	144-5695	1
454-9920	Cylinder Liner	211-7826	1
481-5615	Piston	299-5204	1
488-9888	Piston Ring (Top)	509-6461	1
516-0827	Liner Seal	352-6061	1
516-1856	Sleeve	N/A	1

Table 2 contains the part numbers for the other cylinder pack components that have not been replaced with a new part number.

Table 2

Part Number	Part Name	Qty
223-6361	Piston Ring (OIL CONTROL)	1
263-8955	Piston Pin	1
253-1238	Pin Retainer	2
193-3282	Retainer As (PISTON COOLING JET)	1
204-5447	Piston Cooling Jet As	1
144-0725	Connecting Rod	1

Illustration 1	g06330714
(1) New piston ring groove (2) Previous piston ring groove

Illustration 2	g06023610
(1) Anti-Polishing Sleeve

Note: Anti-polishing sleeve (1) must be installed before installation of the cylinder head or related components.

The new 485-8003 Tool As will work with cuff and non-cuffed cylinder liners. The tool is designed to seat inside the cuff counterbore, eliminating the need for use of the 471-6593 Tool As.