WHEEL-COMPRESSOR 1W8420 - Caterpillar

Engine:
3508 (S/N: 5XM1-UP; 3PS1-UP; BGX1-UP)
3508B (S/N: CBB1-UP; CNB1-UP; PTJ1-UP; 4GM1-UP; PTN1-UP; 6PN1-UP; 2HW1-UP; 5KW1-UP; BPX1-UP; 3LS1-UP; BAG1-UP; 2BM1-UP; 3DM1-UP; 7SM1-UP; 1TW1-UP; 3DW1-UP)
3508C (S/N: LLC1-UP; LLE1-UP)
3512 (S/N: 4DR1-UP; 6PM1-UP; 3MS1-UP; 3RS1-UP; 3WS1-UP)
3512B (S/N: CMC1-UP; FDE1-UP; BLF1-UP; PTF1-UP; BRK1-UP; PTM1-UP; 8RM1-UP; 6WN1-UP; 4AW1-UP; 5AW1-UP; 6GW1-UP; AAG1-UP; FFG1-UP; 7HM1-UP; 8EM1-UP; BRN1-UP; 4TN1-UP; 1PW1-UP; 2EZ1-UP; 2GM1-UP)
3512C (S/N: LLA1-UP; R1A1-UP; LLB1-UP; LLF1-UP)
3516 (S/N: 7KM1-UP; 3SS1-UP)
3516B (S/N: 3NS1-UP; CPA1-UP; 3XS1-UP; BMB1-UP; BPJ1-UP; LEK1-UP; CAN1-UP; FDN1-UP; 6HN1-UP; 7RN1-UP; ZAP1-UP; GAR1-UP; PBR1-UP; GZS1-UP; 1NW1-UP; 2JW1-UP; 8NW1-UP; PTC1-UP; CDE1-UP; TAK1-UP; CBN1-UP; 8CN1-UP; 8KN1-UP; 9AN1-UP; 2FW1-UP; 3CW1-UP; 4BW1-UP; FDX1-UP)
Power Module:
PM3508 (S/N: BLM1-UP)
PM3512 (S/N: BNR1-UP)
PM3516 (S/N: PPS1-UP; BPD1-UP)
A new speed-timing sensor group is now available. The 273-5041 Speed Sensor Group replaces the 129-6628 Speed Sensor Group. The improved design will enhance the sensitivity of the speed-timing sensor. No adjustments are necessary for installation.Replacing an old non-defective speed-timing sensor group with a new sensor group is not a warrantable repair.