Updated Cylinder Block Rear Housing Gasket is Now Available for Certain Cat® Machine Engines {1157, 1201} Caterpillar

Hydraulic Shovel

6015 (S/N: DHB1-UP)

6015B (S/N: FKD1-UP; HSE1-UP; HSF1-UP; LWN1-UP; WSN1-UP; LWS1-UP)

6020B (S/N: HS21-UP; D4R1-UP; DNR1-UP)

6030 (S/N: DHL1-UP)

6030 FS (S/N: DHG1-UP)

6040 (S/N: DHJ1-UP)

6040 FS (S/N: DHX1-UP)

Off-Highway Truck/Tractor

773D (S/N: NBJ1-UP)

773F (S/N: EED1-UP; EXD1-UP)

777E (S/N: KDP1-UP; KDZ1-UP)

777F (S/N: WTK1-UP; JRP1-UP; JXP1-UP)

777G (S/N: GT71-UP; T5A1-UP; TNM1-UP; RDR1-UP; T4Y1-UP)

Quarry Truck

773G (S/N: MWH1-UP; JWS1-UP; T5S1-UP; T5T1-UP)

775F (S/N: EYG1-UP; DLS1-UP)

775G (S/N: T5F1-UP; RFM1-UP; MJS1-UP; T5W1-UP)

Track-Type Tractor

D10T (S/N: RJG1-UP)

D10T2 (S/N: RAB1-UP; JJW1-UP)

D11T (S/N: AMA1-UP; GEB1-UP; TPB1-UP; MDG1-UP; JEL1-UP; JNS1-UP)

Underground Articulated Truck

AD55 (S/N: ANW1-UP; DNW1-UP)

AD55B (S/N: JNW1-UP)

AD60 (S/N: KNW1-UP; NNW1-UP)

Wheel Loader

990H (S/N: BWX1-UP)

990K (S/N: DJK1-UP; A9P1-UP; M9P1-UP; K9X1-UP)

992K (S/N: 8801-UP; KK21-UP; RM21-UP; KK41-UP; RM51-UP; H4C1-UP; ZMX1-UP)

993K (S/N: LWA1-UP; Z4D1-UP; Z8D1-UP; Z9K1-UP; Z4Z1-UP; Z8Z1-UP)

The updated cylinder block rear housing gasket is more durable for improved sealing capacity.

Note: The changes are adaptable to first production. Refer to Technical Marketing Information (TMI) for engine build date to determine parts installed on engine. Production date for this change began at factor by 17 September 2018.

Illustration 1	g06353878
Typical view of gasket with the pop out indicating the "X" identifier imprint. (1) 161-7293 Cylinder Gasket

Note: The updated gasket can be identified by "X" identifier on the lower portion of gasket as shown in Illustration 1.