A New Drive Bearing Is Now Used on Certain 3406E, C11, C13, C15, C16, and C18 Machine Engines {1207} Caterpillar

Articulated Truck

735 (S/N: WWC1-1; B1N1-29297; AWR1-880)

735B (S/N: L4D1-462; T4P1-490; E4R1-1)

735C (S/N: LFJ1-254; TFJ1-257)

740 (S/N: WWD1-485; AXM1-2154; B1P1-30660; DTX1-253)

740 EJECTOR (S/N: B1R1-544; AZZ1-390)

740B (S/N: L4E1-41945; GLH1-143; T4R1-32032; E4S1-139)

740B EJECTOR (S/N: L4F1-530; T4S1-383)

740C EJECTOR (S/N: LFN1-276; TFN1-187)

745 (S/N: 3F61-263; 3T61-154)

745C (S/N: JE81-90118; JE91-102; LFK1-919; TFK1-1492)

Excavator

320D2 (S/N: ZBD1-847)

374F (S/N: EBF1-113; DNM1-497)

390F (S/N: TYE1-223; MGF1-354; FEH1-214; HSM1-306)

UNDERCARRIAGE (S/N: L5N1-11118)

Landfill Compactor

826G Series II (S/N: AYH1-76002)

826H (S/N: AWF1-78001)

826K (S/N: 2321-6253; SET1-509)

836G (S/N: BRL1-75027; 7MZ1-75013)

836H (S/N: BXD1-75014)

836K (S/N: LWZ1-232; TWZ1-594)

Material Handler

MH3295 (S/N: PA91-303)

Mobile Hydraulic Power Unit

374F MHPU (S/N: DP41-105)

385C MHPU (S/N: MSF1-119)

390F MHPU (S/N: B371-98198; PT71-102)

Motor Grader

24M (S/N: B931-195; B9K1-662)

Off-Highway Truck/Tractor

770 (S/N: BZZ1-75001)

770G (S/N: RMA1-101; TWA1-152; KDH1-361; ECM1-329; ECX1-114)

772 (S/N: RLB1-905)

772G (S/N: LTS1-398; KEX1-255; LTX1-210)

Reclaimer Mixer

RM500B (S/N: MB91-146; TAS1-123)

Road Reclaimer/Soil Stabilizer

RM-500 (S/N: ASW1-577)

Soil Compactor

825G Series II (S/N: AXB1-501)

825H (S/N: AZW1-429)

825K (S/N: 2331-5017; SEE1-210)

Wheel Dozer

824G Series II (S/N: AWW1-76003)

824H (S/N: ASX1-78001)

824K (S/N: 2341-4008; RWB1-123)

834G (S/N: BPC1-205; 6GZ1-219)

834H (S/N: BTX1-78004)

834K (S/N: LWY1-722; TWY1-707)

Wheel Loader

980G (S/N: 2KR1-75012; 2SR1-928)

980G Series II (S/N: AXG1-76005; AWH1-75003; AYT1-521)

980H (S/N: PF81-698; P8B1-103; MHG1-78002; A8J1-4264; KZL1-1312; JMS1-78003)

980H Series 2 (S/N: MKP1-388)

986H (S/N: L8S1-357)

986K (S/N: MH81-172)

988G (S/N: BNH1-76001; 2TW1-78002)

988H (S/N: A7A1-333; BXY1-78005)

988K (S/N: LWX1-726; TWX1-1126)

Wheel Tractor-Scraper

641B (S/N: 65K1-1181)

651B (S/N: 67K1-1038)

657B (S/N: 68K1-1380)

660B (S/N: 58K1-421)

666B (S/N: 66K1-237)

Description Of Change: The new drive bearing reduced the stress risers by removing the counterbore and improving the radius.

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

The new 506-9239 Drive Bearing replaces the former 143-8971 Drive Bearing.