BLOCK-TRACK IDLER 9W7884 - Caterpillar

Engine:
C-18 (S/N: MEP1-UP)
C15 (S/N: KRA1-UP; TRB1-UP; LDN1-UP; JEP1-UP; SDP1-UP)
C18 (S/N: BDN1-UP)
Industrial Engine:
C15 IND (S/N: JRE1-UP; MCW1-UP)
C18 INDUSTRIAL (S/N: WJH1-UP; WRH1-UP)
Petroleum Power Train Package:
TH35-C15T (S/N: PBL1-UP)
A new oil emulsion preventative is now being used on the brake actuators of the engines that are listed above. The oil emulsion preventative stops rust from forming on the brake actuator The oil emulsion preventative is being applied at the factory. The oil emulsion preventative will not be applied by anyone anywhere else except the factory.The change is effective at the factory with the engine serial numbers BDN00534-UP, LDN00500-UP, and WRH01703-UP. All other engine prefixes listed above will have the preventative added to all serial numbers at the factory.