2013/07/01 Caterpillar

Petroleum Engine:

3512C (S/N: LLA1-UP)

Description of Change: The new turbocharger water lines provide lower turbocharger cartridge housing temperatures.

Adaptable To: The new 421-6545 Turbocharger Water Lines Gp replaces the 161-4087 Turbocharger Water Lines Gp in the above engines.

The new 421-6545 Turbocharger Water Lines Gp is adaptable to the above engines back to first production.

Rework Procedure

The new parts required to install the 421-6545 Turbocharger Water Lines Gp are listed in Table 1.

Illustration 1	g03387432
(1) 3B-1915 Bolt (2) 5M-2894 Hard Washer (3) 107-0744 Block (4) 252-5658 Hose As (5) 118-4728 Elbow

Note: Steps 1 through 3 are performed for both the left and right turbochargers.

1. Remove hose (4) and elbow (5) from blocks (3) .

2. Remove block (3) from the turbochargers. Set aside blocks and associated hard for reuse.

3. Remove and throw away the 341-9211 Gaskets .

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Illustration 2	g03387422
(4) 252-5658 Hose As (6) 4S-4869 Tee

4. Remove hoses (4) from tee (6) .

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Illustration 3	g03387423
(7) 1L-5081 Spacer (8) 2A-4639 Bolt (9) 5M-2894 Hard Washer (10) 7N-7878 Cover Plate

Note: Steps 5 through 9 are performed for both the left and right turbochargers.

5. Remove cover plate (10) from the turbochargers. Set aside cover plates and associated hard for reuse.

6. Remove and throw away the 341-9211 Gaskets .

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Illustration 4	g03387426
Front view of left-hand turbocharger (7) 1L-5081 Spacer (8) 2A-4639 Bolt (9) 5M-2894 Hard Washer (10) 7N-7878 Cover Plate (11) 341-9211 Gasket

7. Install one cover plate (10) per turbocharger use one gasket (11), two spacers (7), two bolts (8), and two washers (9) .

   Tighten cover plate bolts ... 47 ± 9 N·m (35 ± 7lb ft)

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Illustration 5	g03387428
Rear view of left-hand turbocharger (1) 3B-1915 Bolt (2) 5M-2894 Hard Washer (3) 107-0744 Block (11) 341-9211 Gasket (12) 8M-0505 Connector (13) 6V-6609 O-Ring Seal

8. Install one block (3) per turbocharger use one gasket (11), two bolts (1), and two washers (2) .

   Tighten block bolts ... 47 ± 9 N·m (35 ± 7lb ft)

9. Install one connector (12) and one O-ring (13) per block (3) .

   Tighten connector ... 80 ± 12 N·m (59 ± 9 lb ft)

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Illustration 6	g03387429
Rear view of turbochargers (6) 4S-4869 Tee (12) 8M-0505 Connector (14) 421-6547 Water Tube As (15) 421-6546 Water Tube As

10. Attach water tube assemblies (14) and (15) to tee (6) and connectors (12) .

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Illustration 7	g03387431
Rear view of left-hand supply line (15) 421-6546 Water Tube As (16) 4P-7233 Grommet (17) 8T-1887 Clip (18) 8T-1888 Clip (19) 322-1556 Frame As (20) 0S-1588 Bolt (21) 5M-2894 Hard Washer (22) 9S-8752 Full Nut (23) 254-3262 Bracket As

11. Install grommet (16) around water tube assembly (15) .

12. Install clips (17) and (18) around grommet (16) .

13. Attach bracket (19) to clips (17) and (18) with one bolt (20), two washers (21), and one nut (22) .

    Tighten bracket bolts ... 47 ± 9 N·m (35 ± 7lb ft)

14. Attach bracket (19) to bracket (23) with one bolt (20), two washers (21), and one nut (22) .

    Tighten bracket bolts ... 47 ± 9 N·m (35 ± 7lb ft)

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Illustration 8	g03387420
Rear view of right-hand supply line (14) 421-6547 Water Tube As (16) 4P-7233 Grommet (17) 8T-1887 Clip (18) 8T-1888 Clip (19) 322-1556 Frame As (20) 0S-1588 Bolt (21) 5M-2894 Hard Washer (22) 9S-8752 Full Nut (24) 254-3261 Bracket As

15. Install grommet (16) around water tube assembly (14) .

16. Install clips (17) and (18) around grommet (16) .

17. Attach bracket (19) to clips (17) and (18) with one bolt (20), two washers (21), and one nut (22) .

    Tighten bracket bolts ... 47 ± 9 N·m (35 ± 7lb ft)

18. Attach bracket (19) to bracket (24) with one bolt (20), two washers (21), and one nut (22) .

    Tighten bracket bolts ... 47 ± 9 N·m (35 ± 7lb ft)