REMAN 3500 ENGINE CORE ACCEPTANCE CRITERIA REVISION AND OTHER RECENT PRODUCT IMPROVEMENTS Caterpillar

Monotherm Piston Packs

A new remanufactured cylinder pack has been introduced for use in 3500 High Displacement Engines. The cylinder pack contains a one-piece forged steel piston (monotherm piston) and a drilled rod. Effective in May, this monotherm piston design will be used in all Reman 3500 High Displacement Engines.

Table 1 illustrates the old part numbers and new part numbers. Illustration 1 shows the affected parts.

Table 1

A typical repair process employed during an engine block rebuild is to insert stainless steel plugs where pitting has occurred in the water ferrule area. Stainless steel inserts used by Cat Reman to salvage 3500 engine blocks are now being released as a serviced part number. The inserts have the water ferrule passage pre-drilled. Reman is releasing these pre-drilled inserts to enable dealers to standardize their salvage processes and to decrease the time required for this salvage procedure. The water ferrule insert salvage procedure is documented in SEBF8263. Cat Reman installs these stainless steel inserts as standard practice on all salvaged 3500 engine block water ferrules. New engine blocks which are sometimes used in remanufactured products will not have these inserts. Inserts will be sold in packages of 50.

To improve the reliability and durability of the 3500 engines, Caterpillar and Cat Reman have released different cylinder head part numbers for use on all 3500 engines. These new releases incorporate new springs and rotocoils shown to provide longer life.

* Due to a different tolerance in the injector bore, the 10R8843 cylinder head could cause leaks if used in the 793B 3500 EUI application. The 10R8842 cylinder head is the one that should be used for this specific application. The 10R8846 UTN option can be used in either application.

? Reman UTN now 100% new parts - Historically Reman UTN heads have only guaranteed that the cylinder head casting was new. This provided the customer an opportunity to typically get two lives out of the head by milling it down at the first rebuild. Now, the UTN heads include all new parts but can still be purchased at a discount to new when the customer has a useable core to return to Caterpillar. Refer to SELD0287 or SELD0018 for the core acceptance criteria for cylinder heads.

? Discontinuance of Reman valves ? Due to low customer acceptance, effective July 2008, Reman has discontinued the use of Reman valves in 3500 HD applications.

Cat^? Remanufactured Engine Components offer excellent value to customers. Customers who want fast repair turn-around, superior quality and reliability, and lower repair costs will benefit from the use of these Remanufactured Engine Components. Cat Remanufactured Engine Components provide immediate, off-the-shelf availability at a fraction of the new price.

Please consult the appropriate warranty statement for your area.

Please refer to the Cat Core Management Information System (CMIS 2) Parts Information application describing all reman part/CAF and related information. Also refer to other CMIS 2 inquiry applications such as Customer Profiles, Inspection Reason Codes, Inspection Line Inquiry, Add Charge Information, Entitlement Activity, Entitlement Inquiry, CCR Inquiry, CCR Entry, Shipment Processing; Process Packaging Grief; and Reporting to properly manage core returns and monitor inspection performance. This information will be available to all dealers worldwide after your CMIS 2 conversion date. In the meantime, please continue to use the current CMIS Entitlement Parts Inquiry Screen describing the list of parts in a Core Acceptability Family (CAF) and related part number detail.

For the latest updates of Reman Policies and Core Management (SELD0122), Core Management Systems & Operations Procedures (SELD0040), and Shipping Instructions (SELD0039), go to the Reman Dealer website https://catreman.cat.com and click on Procedures and Policies (listed under Reman Program Information).

If you have any questions regarding core return processing, feel free to call Corinth toll free at (800) 537-2928. For assistance with technical questions, call the Peoria Reman