FLANGE-HALF 1P4578 - Caterpillar

Electric Power Generation:
3512 (S/N: ZAF1-UP)
3512B (S/N: ZAH1-UP; ZAJ1-UP)
Engine:
3508 (S/N: 95Y1-UP; 96Y1-UP; 68Z1-UP)
3508B (S/N: CBB1-UP; S2B1-UP; S2D1-UP; ZAD1-UP; S2E1-UP; 5PS1-UP; GS71-UP)
3508C (S/N: TTB1-UP)
3512 (S/N: PTH1-UP; YAK1-UP; YAX1-UP; 49Y1-UP; 50Y1-UP; 65Z1-UP)
3512B (S/N: YBB1-UP; BRC1-UP; LDE1-UP; PTF1-UP; 2AF1-UP; S2G1-UP; S2H1-UP; S2J1-UP; S2K1-UP; PTM1-UP; YAM1-UP; 8RM1-UP; YAN1-UP; 3ZW1-UP; YAY1-UP; YAZ1-UP)
3512C (S/N: TTC1-UP; TTF1-UP; SBG1-UP; TTG1-UP; MKH1-UP; MLM1-UP; SLM1-UP; TKP1-UP; T3P1-UP; T3R1-UP; T3S1-UP; E3W1-UP; T3W1-UP; E3X1-UP; F2X1-UP; E3Y1-UP)
3516 (S/N: YAL1-UP; ZBL1-UP; YBS1-UP; 71Z1-UP; 73Z1-UP)
3516B (S/N: BCK1-UP; S2P1-UP; YAP1-UP; ZBP1-UP; S2R1-UP; GZT1-UP; YBT1-UP; S2X1-UP; 6HZ1-UP)
3516C (S/N: SKC1-UP; TTD1-UP; TKG1-UP; TTH1-UP; SFJ1-UP; TTJ1-UP; SEK1-UP; SFK1-UP; JTS1-UP; TKS1-UP; WFS1-UP; TKT1-UP; TKY1-UP; GS21-UP)
G3508 (S/N: CPJ1-UP; DLR1-UP)
G3508B (S/N: RBK1-UP)
G3512 (S/N: CSP1-UP)
G3512B (S/N: JHH1-UP)
G3512E (S/N: SSR1-UP; NGS1-UP)
G3516 (S/N: L6A1-UP; L6E1-UP; L6F1-UP; L6G1-UP; WPS1-UP; WPT1-UP; WPW1-UP)
G3516B (S/N: JEF1-UP; L6J1-UP)
G3516C (S/N: F6D1-UP)
G3516H (S/N: GLM1-UP)
G3520C (S/N: GZA1-UP; GZJ1-UP; GZM1-UP; GZN1-UP)
G3520E (S/N: GZE1-UP)
Petroleum Engine:
3508C (S/N: LLC1-UP)
3512C (S/N: LLA1-UP; R1A1-UP; LLF1-UP; R1S1-UP)
3516C (S/N: PES1-UP)
G3520B (S/N: TPC1-UP)
Power Module:
PM3516 (S/N: NBR1-UP)
PMG3516 (S/N: KAD1-UP; JKK1-UP)
Description of Change: The improved oil pump groups provide tighter tolerances for a better press fit.Adaptable To: The improvement has been made to the following oil pump groups listed in Table 1.The oil pump group part numbers have not changed.The improved oil pump groups are adaptable to the above engines back to first production.
Table 1
Oil Pump Groups    
4P-5638 Engine Oil Pump Gp    
106-9872 Engine Oil Pump Gp    
231-5127 Engine Oil Pump Gp    
245-6771 Engine Oil Pump Gp    
273-1587 Engine Oil Pump Gp    
273-1588 Engine Oil Pump Gp    
372-5733 Engine Oil Pump Gp    
395-4207 Engine Oil Pump Gp    Identifying the Former Pump
Illustration 1 g03582929
Illustration 2 g03582922
Identify the former pumps by looking for a series of small dimples at the lower base of the pump. The number of dimples can vary from 1 to 7. Refer to Illustrations 1 and 2 for the location of the dimples.
Illustration 3 g03582921
Remove all pumps identified in Step 1 that have a Julian Date of 13152 - 13234. Refer to Illustration 3 for the location of the Julian Date.The effective serial numbers are listed in Table 2.
Table 2
Effective Serial Numbers    
S/N:68Z01399-UP    
S/N:95Y01465-UP    
S/N:96Y02168-UP    
S/N:5PS00826-UP    
S/N:CBB00591-UP    
S/N:GS700103-UP    
S/N:S2B00834-UP    
S/N:S2D00275-UP    
S/N:S2E00852-UP    
S/N:ZAD92016-UP    
S/N:LLC00225-UP    
S/N:TTB00553-UP    
S/N:49Y01253-UP    
S/N:50Y01907-UP    
S/N:65Z01616-UP    
S/N:PTH00966-UP    
S/N:YAK00911-UP    
S/N:YAX00396-UP    
S/N:ZAF00807-UP    
S/N:2AF00888-UP    
S/N:3ZW01184-UP    
S/N:8RM01058-UP    
S/N:BRC00243-UP    
S/N:LDE00113-UP    
S/N:MKH00283-UP    
S/N:PTF92004-UP    
S/N:PTM02980-UP    
S/N:S2G00405-UP    
S/N:S2H00638-UP    
S/N:S2J00786-UP    
S/N:S2K00377-UP    
S/N:YAM00986-UP    
S/N:YAN00337-UP    
S/N:YAY01107-UP    
S/N:YBB00117-UP    
S/N:ZAH91004-UP    
S/N:ZAJ00302-UP    
S/N:YAZ00585-UP    
S/N:E3W00350-UP    
S/N:E3X00278-UP    
S/N:E3Y00363-UP    
S/N:LLA03932-UP    
S/N:LLF00508-UP    
S/N:MLM00244-UP    
S/N:R1A01863-UP    
S/N:SBG01345-UP    
S/N:SLM00519-UP    
S/N:TTC00609-UP    
S/N:TTF00559-UP    
S/N:TTG00330-UP    
S/N:F2X00294-UP    
S/N:R1S01342-UP    
S/N:T3P00222-UP    
S/N:T3R00263-UP    
S/N:T3S00208-UP    
S/N:T3W00215-UP    
S/N:TKP00226-UP    
S/N:71Z00462-UP    
S/N:73Z00999-UP    
S/N:YAL00408-UP    
S/N:YBS00138-UP    
S/N:ZBL00113-UP    
S/N:6HZ00278-UP    
S/N:BCK00395-UP    
S/N:GZT00172-UP    
S/N:S2P00251-UP    
S/N:S2R00798-UP    
S/N:S2X01696-UP    
S/N:YAP00652-UP    
S/N:YBT00202-UP    
S/N:ZBP00171-UP    
S/N:YAR00457-UP    
S/N:YBW00177-UP    
S/N:ZBR00164-UP    
S/N:JTS00440-UP    
S/N:PES00856-UP    
S/N:SFJ00311-UP    
S/N:TTD00415-UP    
S/N:TTH00746-UP    
S/N:TTJ00477-UP    
S/N:GS200131-UP