2003/09/01 Caterpillar

Engine:

3508B (S/N: 2BM1-UP)

3512 (S/N: 3YF1-UP; 3RS1-UP; 50Y1-UP)

3512B (S/N: S2G1-UP; S2H1-UP; S2J1-UP; S2K1-UP; S2L1-UP; 7HM1-UP; 8EM1-UP; 8RM1-UP; BRN1-UP; S2N1-UP; 4TN1-UP; 6WN1-UP; BMS1-UP; 2GW1-UP; 2EZ1-UP; 1GZ1-UP)

3516 (S/N: 4XF1-UP; 4MJ1-UP; 5MJ1-UP; 3SS1-UP; 29Z1-UP)

3516B (S/N: CDE1-UP; BLH1-UP; FDN1-UP; 6HN1-UP; 7RN1-UP; 8KN1-UP; 9AN1-UP; S2P1-UP; S2R1-UP; S2S1-UP; S2T1-UP; S2W1-UP; 3CW1-UP; 4BW1-UP; S2X1-UP; 1HZ1-UP)

Description of Change: A new pump drive gear is used in the 9Y-5710 Auxiliary Sea Water Pump Group. The new pump drive gear has a larger shaft diameter for increased strength.

Adaptable To: The new 239-5790 Pump Drive Gear is a direct replacement for the 122-3205 Pump Drive Gear. Eight new 0S-1588 Bolts and eight new 8M-3175 Hard Washers are required when you install the new pump drive gear.

Illustration 1	g01018647
(1) Bolts and hard washers (2) Pump drive gear

Illustration 2	g01022717
(2) Pump drive gear