2012/05/21 Caterpillar

Generator Set:

3512B (S/N: ZAH1-UP)

3516B (S/N: ZAP1-UP)

Engine:

3508 (S/N: 97Y1-UP)

3508B (S/N: CNB1-UP; S2B1-UP; ZAD1-UP; 5PS1-UP; BPX1-UP)

3512B (S/N: BRC1-UP; 8RM1-UP)

3512C (S/N: F2X1-UP)

3516 (S/N: CMD1-UP; ZAL1-UP; YAS1-UP; 25Z1-UP; 73Z1-UP)

3516B (S/N: FDN1-UP; 6HN1-UP; 7RN1-UP; PBR1-UP; GZS1-UP; GZT1-UP)

G3516 (S/N: 25Z1-UP)

Description of Change: The new clamping for the jacket water bypass tube provides more secure clamps that help to reduce the possibility of leaks.

Adaptable To: The 7C-8122 Water Lines Gp has been updated with new clamping.

The new parts are listed in Table 1.

The effective serial numbers are listed in Table 2

Rework Procedure

1. Drain the cooling system.

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Illustration 1	g03045497
(1) 0L-2070 Bolt (2) 5M-2894 Hard Washer (3) 8N-3639 Retainer (4) 8N-3640 Retaining Ring (5) 0S-1594 Bolt

2. From the top of the tube, remove two bolts (1), two washers (2). two retainers (3), and one ring (4) .

3. From the bottom of the tube, remove two bolts (5), two washers (2). two retainers (3), and one ring (4) .

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Illustration 2	g03045501
(5) 0S-1594 Bolt (6) 340-1591 Ring (7) 108-6170 Clamp As (8) 0S-1619 Bolt (9) 9X-6458 Hard Washer (10) 9S-8752 Full Nut (11) 0S-1571 Bolt

4. At the top of the tube, install ring (6). Press the ring against the flange.

5. Loosely assemble two clamps (7) with two bolts (5), two nuts (10), and four washers (9) .

6. Bolt the clamps to the flange with two bolts (8) and two washers (9). After those bolts are tightened, tighten bolts (5) and nuts (10) .

7. At the bottom of the tube, install ring (6). Press the ring against the inlet elbow for the water pump.

8. Loosely assemble two clamps (7) with two bolts (5), two nuts (10), and four washers (9) .

9. Bolt the clamps to the inlet elbow with two bolts (11) and two washers (9). After those bolts are tightened, tighten bolts (5) and nuts (10) .