NUT 1793038 - Caterpillar

Electric Power Generation:
3512B (S/N: ZAH1-UP)
Engine:
3508 (S/N: 95Y1-UP)
3508B (S/N: S2A1-UP; CNB1-UP; S2B1-UP; S2D1-UP; YAD1-UP; ZAD1-UP; S2E1-UP; S2F1-UP; 2BM1-UP; 3DM1-UP; 7SM1-UP; PTN1-UP; 1TW1-UP; 5KW1-UP)
3512B (S/N: CMC1-UP; NSC1-UP; S2G1-UP; S2H1-UP; YAH1-UP; S2J1-UP; S2K1-UP; S2L1-UP; PTM1-UP; S2M1-UP; YAM1-UP; 7HM1-UP; 8EM1-UP; 4TN1-UP; 1PW1-UP; 2GW1-UP; 6GW1-UP; YAY1-UP; 2EZ1-UP)
3512C (S/N: TTF1-UP; MKH1-UP; SLM1-UP)
3516B (S/N: BMB1-UP; PTC1-UP; 7RN1-UP; 8KN1-UP; S2P1-UP; S2R1-UP; S2S1-UP; YAT1-UP; 4BW1-UP; S2X1-UP; S2Z1-UP)
3516C (S/N: PAG1-UP; JTS1-UP)
G3516B (S/N: ZBC1-UP)
Petroleum Engine:
3512C (S/N: LLB1-UP)
Power Module:
PM3508 (S/N: BLM1-UP)
PM3512 (S/N: BNR1-UP)
Engine News, SEBD9732, 06 October 2011, "Repairing Expansion Tank Support Brackets for Certain 3500 Engines". Disregard the information in the article that is listed above. Refer to the information in the following article.Some support brackets for the following tanks:236-1839, 187-6587 and 293-3399 in applications with excessive vibrations have developed cracks. The cracks can result in damage to the expansion tanks that causes leaking.Recommendations for Repair
Illustration 1 g03683566
187-6587 Expansion Tank As (1) CP01 (2) CP02 (3) CP03
Illustration 2 g03683567
293-3399 Expansion Tank As (1) CP01 (2) CP02 (3) CP03
Illustration 3 g03683568
236-1839 Expansion Tank As (1) CP01 (2) CP02 (4) CP04If small cracks are found in the support bracket, refer to Special Instruction, SEBD0512, "Caterpillar Service Welding Guide". Grind out the cracks to a width and depth of 6.35 mm (0.250 inch). Fill the void with welding material.The bracket assembly can be strengthened by welding additional steel onto the bracket.Cut all pieces to the proper size using carbon steel 10 mm (0.4 inch) thick plate. Refer to "Gusset and Plate Dimensions" for the correct dimensions of the plates. The chamfers are required where the gussets meet the heat exchanger mounting plate.
Illustration 4 g03683569
Close up for CP01 weld repair (1) CP01 (5) Chamfer both sides of the bracket and heat exchanger mounting plateUtilizing 8 mm (0.3 inch) fillet welds, weld entire perimeter of CP01 (1) as shown in Illustration 4 on front and back of gusset for both sides.Note: Welds at location (5) must be ground flush for assembly.
Illustration 5 g03683570
Close up for CP02 weld repair (2) CP02 (6) Chamfer front side of the bracket and additional gusset at this locationUtilizing 8 mm (0.3 inch) fillet welds, weld entire perimeter of CP02 (2) as shown in Illustration 5 on the front of gusset for both sides.Note: Welds at location (6) must be ground flush for assembly.
Illustration 6 g03683571
Close up for CP03 or CP04 weld repair (2) CP02 (3) CP03For 187-6587 Expansion Tank As and 293-3399 Expansion Tank As utilize CP03.For 236-1839 Expansion Tank As utilize CP04.Utilizing 8 mm (0.3 inch) fillet welds, weld entire perimeter of the corresponding piece CP02 as shown in Illustration 6. Recess plate 10 mm (0.4 inch) between main heat exchanger bracket supports to ensure proper weld assembly. Weld the perimeter of CP03 or CP04 shown in Illustration 6.Paint any bare metal after the modifications are complete.Gusset and Plate Dimensions
Illustration 7 g03683537
Support plate CP01The support plate CP01 fits all
Illustration 8 g03683540
Support plate CP02The support plate CP02 fits allNote: The support plate CP02 has a left-hand side and right-hand side.
Illustration 9 g03683541
Support plate CP03The support plate CP03 fits 187-6587 Expansion Tank As and 293-3399 Expansion Tank As